Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- PacNW928
- Messages
Search
|
Re: Any ride height tips?
Curt Nichols
BTW, I made ground-to-fender height measurements before and after mounting
my new wheels to the car. Some tidbits I found interesting: - After lifting but before settling, the front sat 2.5" (63mm) higher and the rear sat 1.5" (38mm) higher. - After 60 miles of driving the car sat about .25" (6mm) higher at the fender (all around) than it did before the wheel change. This could be due to the slightly larger tire diameter, full tread depth, or dumb luck. - When I started, the fenders sat .25" higher on the left than on the right. I park immediately next to a concrete pillar, around which I make a tight left turn. I have limited space to work, so half way through I backed the car out and parked it tail-first, repeating the parking maneuver in reverse. After that the right side came up .25". I'm guessing one should measure ride height w/o turning the car in tight circles. Curt Nichols '87 S4 A/T great white -- Seattle, USA member: Rennlist, 928OC, PCA/PNWR, ACM |
|
Any ride height tips?
Curt Nichols
I got the monster truck tires* mounted on the mudshark and dang if they
don't fill out those wheel wells, maybe a bit too much. Upon returning from my "settle the suspension and give 'em a good heat cycle" drive, I noticed a grandprixweiss scuff on the outer edge of one of the rear tires (fantastic potholes here!). I can still fit my fingers between the rear tires and fender without pinching them badly, but I'm thinking I need to make sure the ride height is adjusted well. So, I've armed myself with the factory specs, a handy tip page () and a little knowledge (DANGER!). What I'm still lacking is a handy tool for turning the nut to adjust the height and any sage advice from those who have gone before me. (I've searched the Rennlist archives for "ride height" and came up completely empty. This is, of course, impossible.) Any tips in the "make it easier" category are appreciated. *Okay, they're not quite mudders, they're S-02 Pole Positions on 9/10x17" Kinesis Supercups. But they DO fill out to the fender nicely. Only 70 miles on 'em so far. Curt Nichols '87 S4 A/T great white -- Seattle, USA member: Rennlist, 928OC, PCA/PNWR, ACM |
|
Re: A day with ProFormance
rhenson
Hey Adam,
toggle quoted message
Show quoted text
So why don't you tell us what you really think about dragg'in the cars? Love it all..you only live once...and you can't take it with you... Ray Henson 88' S4 Auto - SandMetallic/Rolls Royce Port Orchard, WA -----Original Message-----
From: Adam Birnbaum [mailto:adamb777@...] Sent: Friday, June 02, 2000 12:34 PM To: PacNW928@... Subject: Re: [PacNW928] A day with ProFormance Hey Calvin, I think I can answer your query regarding drag racing. The reason we're racing is because we are a bunch of mindless idiots that are fanatical about our cars, believe them to be one of the finest and most desirable automobiles on the road, like to test the limits of our sharks and ourselves, and above all else, we like to hang out together and watch each other do silly things. (Can I get an AMEN BROTHER?) With regard to the half shaft issue, I've inserted an (edited) email exchange between myself and DR which all of you might find of interest: Hi Adam,....and I'd send you the airfare if I didn't think you'd get flamed on the list for the next two months straight for taking a weekend off just to have a life :). Wally was nice enough to impart some comforting words of wisdom on a slight mishap I had on my Nology wire install. Just to show my thanks for that and for 928SP's ongoing support of my 928 habit, I'm going to be sending y'all (trying my best southern accent here) a Pac NW Shark Drags T-shirt. Since you folks won't be here for the event, I thought I'd send a piece of the event out to you. They should be ready in the next couple weeks. I figure with you getting the event shirts coupled with all of the orders to replace broken half shafts after the event, it'll be just like you're here. In truth I'm hoping for no mechanical failures, and will probably be giving an "it's all about consistency, not quick e.t." speech prior to everyone running. I'd feel really terrible of someone damaged their shark as a result of the event. So, can we get a bulk discount on those half shafts? Discount heck, if anyone breaks theirs at your event I will sell them theNow, now,..... I don't want to tell them that. Knowing these guys they'll probably interpret that as an incentive to be breaking parts. :) I kid you not when I talk about the competitiveness of these guys, they're insane! {End email} ........so, there you have it Calvin. The half shafts are covered :). There are several different reasons for owning a shark, and I don't think that one is more valid than the other. You can buy a low mileage show piece and save it for sunny weekends, you can buy a high mileage mule and run it through the paces (yours truly). Or you can do both with the same car (Redinger, you kill me!) I don't discount pride in ownership at all, for many having a shark in the garage is the most satisfying part of ownership. (I'm not saying that this is you, it's just an example). For many of us locally here, pride in ownership is just a piece of the pie, our intrigue goes into other areas like performance driving and upgrades. One of the reasons that I enjoy putting together these gatherings is that there are so many local owners that share my philosophy of pushing these cars deep into their performance envelope and trying different means to extend that envelope. Its kind of self serving, but I organize these Pac NW Gatherings because it an opportunity for me to share ideas and stories with like minded individuals. I realize that many out there don't share the same philosophy regarding their sharks, and prefer to preserve them and drive them occasionally. The first local gathering, The 928 Owner's Showdown which was held last fall, was tailored to allow all local owners to participate in an event (Kart Race) regardless of everyone's personal philosophy about their own car, and just share in our pride of ownership. I wanted an event designed around getting people together without putting any of the sharks at risk. Much to my suprise, I discovered a lot of owners were interested in pushing their cars and discovering and improving performance benefits much like myself. We did a dyno day next. I couldn't believe the amount of willing participants that attended. As almost a joke, I threw out the idea of bracket drags for the next event. I really was hit with a sense of pride when there was an almost unanimous "when's the date?" for a reply. Breakage is costly, there's no doubt about it, but a lot of us accepted that long before we purchased our sharks. A lot of the crazy things we do with our sharks provides R&D opportunities to help the 928 community as well. Louie is actively developing and designing modifications for our cars, some of which I can proudly say he tested at our last event. Ultimately, these performance items may end up on your car. If you have a set of steroid drop links, than you already have benefitted from someone else's high performance testing. I hope this kind of explains things Calvin. I wouldn't fault any shark owner for not wanting to race his car, I can see how it may be seen as abusing the vehicle. For some of us though, part of ownership means finding shortfalls in our cars and improving them. So, are you going to come out and watch the carnage on the 25th? Someone may need to ask you for a ride home if their shark goes home on a flatbed. :) -Adam Birnbaum '88 S4 A/T - "Ready to romp on June 25th!" ---------- From: mmayn43508@...oil and that may be what happened, it is corrected by buying a redrilledthe half shafts on the rearend?------------------------------------------------------------------------ Porsche Boxter. You and a friend. Nine dream days from Napa Valley to Beverly Hills. Provided by CarsDirect.com. Click to enter. ------------------------------------------------------------------------ To unsubscribe from this group, send an email to: PacNW928-unsubscribe@... |
|
Re: A day with ProFormance
--- In PacNW928@..., mmayn43508@a... wrote:
I agree that they need to be driven, like anything they fall apartrevs all day.I had two alcy dragsters they ran 6.25 et at 230 and we burned up parts like crazy going faster and faster. Wow different league all together, must have been a blast though. 1/4 mile shit in these cars..... boy expensive stuff to replace. then there is the 2.02 rearend isreally hard to load up!!! Can thess be changed to a 3 something?My 87 Auto has a 2.2 as does the 88. I think 89 and up got the 2.57 and the GT has a 2.75. Someone put in a 3.11 (Rennlist) but don't know the cost or loss of top end. As with all things there are trade offs going one way or the other. Im not looking to be competitive in the 1/4 mile events, just out there to have some fun. Personally I think putting my 128000 miler on the dyno was a he## of a lot riskier than running down the 1/4 mile. Shoot I do that every time I hit one of those timed merging traffic control lights when I drive the I-5. Pedal to the metal Yea!!!!!! Later Tom |
|
Re: A day with ProFormance
Adam Birnbaum
Hey Calvin,
I think I can answer your query regarding drag racing. The reason we're racing is because we are a bunch of mindless idiots that are fanatical about our cars, believe them to be one of the finest and most desirable automobiles on the road, like to test the limits of our sharks and ourselves, and above all else, we like to hang out together and watch each other do silly things. (Can I get an AMEN BROTHER?) With regard to the half shaft issue, I've inserted an (edited) email exchange between myself and DR which all of you might find of interest: Hi Adam,....and I'd send you the airfare if I didn't think you'd get flamed on the list for the next two months straight for taking a weekend off just to have a life :). Wally was nice enough to impart some comforting words of wisdom on a slight mishap I had on my Nology wire install. Just to show my thanks for that and for 928SP's ongoing support of my 928 habit, I'm going to be sending y'all (trying my best southern accent here) a Pac NW Shark Drags T-shirt. Since you folks won't be here for the event, I thought I'd send a piece of the event out to you. They should be ready in the next couple weeks. I figure with you getting the event shirts coupled with all of the orders to replace broken half shafts after the event, it'll be just like you're here. In truth I'm hoping for no mechanical failures, and will probably be giving an "it's all about consistency, not quick e.t." speech prior to everyone running. I'd feel really terrible of someone damaged their shark as a result of the event. So, can we get a bulk discount on those half shafts? Discount heck, if anyone breaks theirs at your event I will sell them theNow, now,..... I don't want to tell them that. Knowing these guys they'll probably interpret that as an incentive to be breaking parts. :) I kid you not when I talk about the competitiveness of these guys, they're insane! {End email} ........so, there you have it Calvin. The half shafts are covered :). There are several different reasons for owning a shark, and I don't think that one is more valid than the other. You can buy a low mileage show piece and save it for sunny weekends, you can buy a high mileage mule and run it through the paces (yours truly). Or you can do both with the same car (Redinger, you kill me!) I don't discount pride in ownership at all, for many having a shark in the garage is the most satisfying part of ownership. (I'm not saying that this is you, it's just an example). For many of us locally here, pride in ownership is just a piece of the pie, our intrigue goes into other areas like performance driving and upgrades. One of the reasons that I enjoy putting together these gatherings is that there are so many local owners that share my philosophy of pushing these cars deep into their performance envelope and trying different means to extend that envelope. Its kind of self serving, but I organize these Pac NW Gatherings because it an opportunity for me to share ideas and stories with like minded individuals. I realize that many out there don't share the same philosophy regarding their sharks, and prefer to preserve them and drive them occasionally. The first local gathering, The 928 Owner's Showdown which was held last fall, was tailored to allow all local owners to participate in an event (Kart Race) regardless of everyone's personal philosophy about their own car, and just share in our pride of ownership. I wanted an event designed around getting people together without putting any of the sharks at risk. Much to my suprise, I discovered a lot of owners were interested in pushing their cars and discovering and improving performance benefits much like myself. We did a dyno day next. I couldn't believe the amount of willing participants that attended. As almost a joke, I threw out the idea of bracket drags for the next event. I really was hit with a sense of pride when there was an almost unanimous "when's the date?" for a reply. Breakage is costly, there's no doubt about it, but a lot of us accepted that long before we purchased our sharks. A lot of the crazy things we do with our sharks provides R&D opportunities to help the 928 community as well. Louie is actively developing and designing modifications for our cars, some of which I can proudly say he tested at our last event. Ultimately, these performance items may end up on your car. If you have a set of steroid drop links, than you already have benefitted from someone else's high performance testing. I hope this kind of explains things Calvin. I wouldn't fault any shark owner for not wanting to race his car, I can see how it may be seen as abusing the vehicle. For some of us though, part of ownership means finding shortfalls in our cars and improving them. So, are you going to come out and watch the carnage on the 25th? Someone may need to ask you for a ride home if their shark goes home on a flatbed. :) -Adam Birnbaum '88 S4 A/T - "Ready to romp on June 25th!" ---------- From: mmayn43508@...oil and that may be what happened, it is corrected by buying a redrilledthe half shafts on the rearend? |
|
Re: A day with ProFormance
Hi Calvin,
--- In PacNW928@..., mmayn43508@a... wrote: I have heard that at high revs the some of the journals get starvedfor oil and that may be what happened, it is corrected by buying aredrilled crankshaft,I have heard this too, from Mark A (928 Intl) He describes it in his latest catalog. I didn't think Lloyd got the revs quite that high, but after what Adam posted about being at 6500 rpm , it could be!!. I am curious as to why everyone wants to quarter mile these cars.....they really are not setup for this, doesn' t anybody worryabout the half shafts on the rearend?I look at it as a way to get together with other 928 owners and what better way than at a "performance" event. True the 928 is not exactly the best 1/4 miler, but the numbers they can put out are very respectable and all these events give me data on the performance of my car vs other cars as well as other comparable 928s. Something to gauge my car with in my quest for perfect state of tune. If I was worried about things breaking on my car then it probably wouldn't see the light of day outside my garage. These cars are meant to be driven (case in point, let mine sit for one week, and the battery dies) and like anyone who has met me can testify to - if it breaks then its just an opportunity to replace it (hopefully with something better). ;-) Later, Tom |
|
Re: A day with ProFormance
Adam: I wan't trying to pass judgement, I just think that it is hard on a car
that isnt made for groung pounding, like 12 bolt rear ends or 9 inch fords and big and small blocks etc. Now i can see a road course with a 5 speed, I drive mine everyday and over to the tricities once a month, and i really enjoy driving the car, great car for the money, I wish I had a 5 speed....but shifting all day would wear me and the clutch out, I would like to see a 4:11 rear end in one of these, I think the 2:02 is to high, but thats what it was made for. I might come and watch it has been awhile since i was at the track Does it effect these cars much running them real hard? do you break much? Do you know who has the black GTS in seattle? Saw it at innerbay. calvin |
|
Re: A day with ProFormance
Lloyd Johnson
¿ªÔÆÌåÓýIt was better than that;? they were not using the bus stop or the chicane on the front straight.? You come sweeping out of turn 8 power through turn 9 onto the front straight and then just go full throttle until you reach the braking zone for turn 1. Lloyd -----Original Message-----
From: midlman@... [mailto:midlman@...] Sent: Friday, June 02, 2000 8:00 AM To: PacNW928@... Subject: [PacNW928] Re: A day with ProFormance Hi Lloyd, Now that would be a sight (and sound) to hear you coming out of the
--- In PacNW928@..., "Lloyd Johnson" wrote:
Bummer about the rod knock? let us know what comes of it.? Don't
A couple of other thoughts,?? There is that guy in St Louis (cant
Anyway , hope it turns out OK. Later, Tom ------------------------------------------------------------------------
To unsubscribe from this group, send an email to:
|
|
Re: A day with ProFormance
I agree that they need to be driven, like anything they fall apart
sitting...I would be scarred to death to unload the clutch at high revs all day. I had two alcy dragsters they ran 6.25 et at 230 and we burned up parts like crazy going faster and faster. 1/4 mile shit in these cars..... boy expensive stuff to replace. then there is the 2.02 rearend is really hard to load up!!! Can thess be changed to a 3 something? Calvin |
|
Re: A day with ProFormance
Hi Lloyd,
Now that would be a sight (and sound) to hear you coming out of the chicane full throttle!!!!! --- In PacNW928@..., "Lloyd Johnson" <lloydj@e...> wrote: I went out to SIR today to get some seat time with ProFormance.straight wide open (yes, toto, you can hit turn one doing in excess of 120 MPH). There were more passing and let by zones. And smaller run groups with more track time. and last session of the day. I was coming out of turn 5a going into 5b when then engine developed rod knock and I shut it down. If you use AAA don't call them to tow from the track. Saturday, when Leif gets back into town I'll find out what the damage is. The only way I can think to make this better is when the motor is opened up turn it into a 6 liter .... club on saturday. Bummer about the rod knock let us know what comes of it. Don't forget, Mark A is running a 6.5 liter. You know once its open you might as well.. Funny how easy it is to spend other peoples money ;-) A couple of other thoughts, There is that guy in St Louis (cant remember the name or web page --search the rennlist) He has complete rebuilt GT motor with ported and polished heads for $4500. And if you're really adventurous check out Sterling Gees page, he has lots of ways to spend money!!!. Anyway , hope it turns out OK. Later, Tom |
|
Re: O2 sensor Question ++
Hi Adam,
Thanks, the FPR is on back order for the moment (probably not ready for drag day) but will take you up on your offer once it comes in. I will probably spring for the A/F meter (with injector duration) sometime down the road too. Need something to put in place of the ashtray anyway. ;-) Later, Tom --- In PacNW928@..., "Adam Birnbaum" <adamb777@w...> wrote: Louie wrote:gauge toHi Tom, setIit to the correct (stock) pressure to start with.Hey Tom, bought a while ago trouble shooting a fuel system failure in a GMCJimmy I had a while back. It's one those that comes with a million different |
|
Re: O2 sensor Question ++
Adam Birnbaum
Louie wrote:
Hi Tom,set it to the correct (stock) pressure to start with.Hey Tom, I've got a fuel pressure gauge somewhere if you need to borrow it. I bought a while ago trouble shooting a fuel system failure in a GMC Jimmy I had a while back. It's one those that comes with a million different connectors and has like a three inch face. Let me know if your interested. -Adam |
|
Re: A day with ProFormance
I have heard that at high revs the some of the journals get starved for oil
and that may be what happened, it is corrected by buying a redrilled crankshaft, I am curious as to why everyone wants to quarter mile these cars.....they really are not setup for this, doesn' t anybody worry about the half shafts on the rearend? Calvin 90 928 S4 |
|
Re: A day with ProFormance
Adam Birnbaum
Lloyd wrote:
I went out to SIR today to get some seat time with ProFormance. If you ever get the chance you should do this. They run the frontstraight wide >open (yes, toto, you can hit turn one doing in excess of 120 MPH). Talk about some serious G's, I don't know if I'd have the kahuna's to stick turn one, I could see myself flying into the tire wall at turn two. That was the good news and what I found out in the first session and lastsession >of the day. I was coming out of turn 5a going into 5b when then engine developed >rod knock and I shut it down. Any ideas as to what caused this, higher shift points maybe? At the last DE, I happen to look at my shift point on the short straight between turn 2 and 3A. I was shifting to "3" at 6500 rpm (!) It's such a short straight I didn't even bother to watch my gauges, I was too focused on setting up for the turn. That could have been my stroker kit right there, I didn't pick pick up on it until the second session. If you use AAA don't call them to tow from the track.Do they ding ya? Saturday, when Leif gets back into town I'll find out what the damage is.The only >way I can think to make this better is when the motor is opened up turn it into a 6 >liter .... Oh yeah! The "Tom Middleton Postulate" or Dang this hurts, I had another track day scheduled with the Porsche clubon >saturday. I'll be there Lloyd, although I think its on Sunday. If you're not out pricing stroker kits, why don't you drop by. I'd like to chat about the ProFormance day and what's up with your GT. Who knows, after the Shark Drags we may have to do a group buy on those stroker things. :) -Adam - "We can rebuild it, make it stronger, faster........" |
|
A day with ProFormance
Lloyd Johnson
¿ªÔÆÌåÓýI went out to SIR today to get some seat time with
ProFormance.?
?
If you ever get the chance you should do
this.? They run the front straight wide open (yes, toto, you can hit turn
one doing in excess of 120 MPH).? There were more passing and let by
zones.? And smaller run groups with more track time.
?
That was the good news and what I found out in the
first session and last session of the day.? I was coming out of turn 5a
going into 5b when then engine developed rod knock and I shut it down.? If
you use AAA don't call them to tow from the track.? Saturday, when Leif
gets back into town I'll find out what the damage is.? The only way I can
think to make this better is when the motor is opened up turn it into a 6 liter
....
?
Dang this hurts, I had another track day scheduled
with the Porsche club on saturday.
?
Lloyd
? |
|
Re: O2 sensor Question ++
In a message dated 6/1/00 2:59:00 PM Pacific Daylight Time,
midlman@... writes: I have an adjustable FPR on order and it needs to beHi Tom, Yes It needs to be set/optimized. You will need a fuel pressure gauge to set it to the correct (stock) pressure to start with. The instructions that come with the FPR say to never adjust it without having a gauge connected so you can see what the pressure is while adjusting. You won't need to adjust it very far off of the stock setting so it is mostly a fine tuning of the pressure. With my adjustable FPR, I did the best I could by using a mixture meter, the JC Whitney one that recently broke. After I put on the Dastek Piggy back computer, I set the A/F ratio (for max power) with that so I set the adjustable FPR back to the stock setting and left it. How to do the optimization? I think the best way would be on a dyno since max power is the result you are after in the end anyway. An A/F gauge is the next best way and you would set the mixture for about half way between center and full rich. From what I have seen, the stock setting errors on the rich side of max power. Expect that you will need to reduce pressure to lean it a little from stock. There are formulas which will give you the percentage change in fuel flow vs pressure change. I can try to dig out the formulas if you want. The way you would set it on the dyno would be to start at the stock setting and make about 3 runs to get an average. Then richen the mixture about 2 or 3 percent using the formula to figure what that pressure change would be. Make 3 more runs and see what the result is. If power goes down, then you know you were too rich to start with so then reduce fuel flow by a couple percent from the stock pressure and try again. You keep doing this until you can't get any more gain. It's like changing jets on a carb and checking power. It takes some analysis of the dyno runs and jotting down the effects of each pressure change so it will be easier and you will use less dyno time if you have a helper. You always start by going rich so if it happened to be lean you won't go even leaner and maybe damage something. If you have made some mods like a different exhaust, don't expect that you will find a pressure setting that will give the max power throughout the rpm range. It will be a compromise, and if you have to leave it too rich at some rpms to get max power at some other rpm, leave it rich at the top end. When setting the mixture with the Dastek piggy back computer, I had to make the mixture richer at the bottom, leave it alone in the middle, and lean it at the top to get best power across the whole range. I recently put my car back to stock exhaust and stock chip to take baseline stock hp/tq readings. I was on the dyno Wednesday and noted on my mixture meter that it was pretty rich all across the rpm range. I had the FPR set for stock pressure, and I may have picked up a few hp by reducing pressure. I have my mix meter and fuel pressure gauge permanently mounted in the car or you could borrow them. Maybe someone else has a set you could use. I'll have a look at my old mixture meter. Maybe the reason it quit wasn't too drastic and you could use that one. Louie |
|
Re: O2 sensor Question ++
Thanks Louie,
I have an adjustable FPR on order and it needs to be adjusted/optimized after installation. Is there another way to do this (without A/F meter) or is this a necessity. I assume the car will run OK after installing the FPR??? You have the adjustable FPR on you GT right?? Did you optimize it yet? I wonder if there is a place where this can be rented?? Maybe the dyno shops.??? Thanks for the help, Later, Tom Hi Tom,Dave Roberts. It costs about $100 and is a quality unit. It had good installationWhitney snip snip Louie |
|
O2 sensor Question ++
Hi everyone,
I would like to know if anyone knows how to get readings from the O2 sensor. I know Louie had something rigged up at the dyno day, I have a digital multi-meter, is there a way to hook it up and what kind of readings can I expect to see (ie rich vs lean vs rpm)?? On the topic of the prize for the Drag "winner", if the "Stone Guards" don't work out, how about a copy of the Need for Speed Porsche Edition? Thanks in advance, Tom midlman@... 87S4 (tweaking away ;-))) |
|
Re: O2 sensor Question ++
In a message dated 6/1/00 1:42:04 PM Pacific Daylight Time,
midlman@... writes: I would like to know if anyone knows how to get readings from the O2Hi Tom, Yes, there is a way. The easiest is to order the A/F meter from Dave Roberts. It costs about $100 and is a quality unit. It had good installation instructions. I bought one from him when my $40 unit from J.C. Whitney failed. You may also want to look at . Click on the Air-Fuel Monitor menu selection on the left side of the screen. They have something very similar to what DR has for the same price and they also have a combination A/F ratio meter and injection pulse duty cycle meter, also for the same price. I wish I had gotten that one instead since I want to know how long the injectors are open as well as the A/F fuel ratio. You will go nuts trying to get a meaningful reading from your O2 sensor with a digital meter. The reading fluctuates rapidly as the computer is constantly adjusting mixture based on the O2 output. At idle, mine changes from full lean to full rich about once per second. At cruise, it stays near the center and changes at maybe 4 or 5 times a second. At WOT the O2 sensor is out of the loop for controlling the mixture and the reading is much more stable with little fluctuation. You could get some indication with a very high impedance, 10 meg ohm, analog meter since that would tend to average the signal. Thebar graph type meter works ok as long as it is high impedance. A simple analog VOM would load the O2 sensor too much. You connect to the black O2 wire and ground. If you have a heated sensor, the white wires are the heater wires. The O2 sensor output is between zero and about 1 volt with A/F ratio of 14.7 ocurring at approximately 0.45V. Best power A/F of around 13 would show about .85V. These are not absolute numbers because the O2 voltage and A/F ratio is non linear and varies with the O2 sensor, it's age, temperature, phase of the moon, color of your socks, and other stuff. They are more accurate in a narrow range around the center, and get worse with age near the ends of the range. You can get more accurate, calibrated O2 sensors though if you desire. EFI Systems has them and the price is no worse than the standard Bosch. Let me know if I can help/confuse more. Louie |
|
Nology install part II
ADAM BIRNBAUM
On my last post I stated how I munged up two of the valve cover bolts on
reinstall. I talked it over with Wally Plumley at 928 SP, who was quite suprised (like myself) as to what happened. He was concerned that because the bolts are steel and the heads are aluminum, that the head threads might be damaged. He said to go ahead and chase the threads with a tap and use lots of oil. I did this, and the tap followed the threads fine. In flashing a light onto the valve cover bolt hole, I notice some interesting things. 1) The hole does not go through the head, so I wouldn't have to worry about shavings dropping into the motor anywhere. 2) The hole has an insert! Thank god for small miracles. I'm thinking that the bolt must be made of milder steel than the insert, which would explain why the bolt threads chewed up, and (hopefully) not the head threads. The tap chased the threads easily, and there was no (visible) metal fragments from using the tap. I ordered new bolts from 928 Int'l, which I should have by thursday. Got a DE this weekend that I don't want to miss. As far as the stock retaining clips, Wally suggested drilling them out, which I will be doing tonight. Hopefully I should be all back together thursday night, new coils and all. I'll post the results! -Adam Birnbaum '88 S4 A/T |
to navigate to use esc to dismiss