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Re: Regearing 3rd & 4th gear after conversion
Larry Hamm
You mean the one out of a light, aerodynamic car...?
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Larry H. On 4/17/2012 7:47 PM, Gordon Anderson wrote:
Use the Subaru transmission made for the engine |
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Re: Regearing 3rd & 4th gear after conversion
eric rowland
There will always be plenty of differing opinions on the board. I've read here for over 5 years and learned a lot before I decided on an upgrade both in engine size and make trans changes. The gearing in the VW trans is optimized for a VW waterboxer engine. If that's not what you intend to run, and presumably it's not if you're posting here, you'll have to work through a lot of posts and a little math to help you make a good guess as to the right direction for your van. Take the time to outline how you intend to use your newly robust vehicle. If you're solid there, you'll be able to sort through everyone's opinions and find the few that address your requirements. That's what I did. Everyone here is passionate but they can't know what you want from your Westy.
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--- On Tue, 4/17/12, Tom Dueck <glen_burnie@...> wrote:
From: Tom Dueck <glen_burnie@...> Subject: RE: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 5:42 PM Thanks for your advice, it's much appreciated.听 There seems to be a mixed consensus on this issue. Tom To: subaruvanagon@... From: eric_rowland1@... Date: Tue, 17 Apr 2012 12:05:42 -0700 Subject: Re: [subaruvanagon] Regearing 3rd & 4th gear after conversion 听 听 听 听 听 听 听 听 听 听 听 听 My '91 Westy/Syncro is running a 3.0 conversion w/16" rims and a higher 3rd/4th gear courtesy of Lucas Hofgard in Boulder. The higher 3rd works as intended and the gear spacing between 2nd/3rd is not an issue when driving in town. Even here in the Southern Rockies at 7000 feet with the higher 4th gear I can climb almost any hill at highway speeds and maintain 60/65 in 3rd on those occasions where I need to downshift. From my experience, I'd recommend both changes with a 6 cylinder engine but your 2.5 may have different requirements and your location may present a different set of issues. If your trans is in good shape you can leave it intact and add 16" rims to see if that gives you the upper range you're looking for on the highway. Then tackle the gearing at another time if the rim/tire choice doesn't give you everything you're looking for. --- On Tue, 4/17/12, surfervan91 <tomdueck@...> wrote: From: surfervan91 <tomdueck@...> Subject: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 10:00 AM 听 Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? [Non-text portions of this message have been removed] 听 听 听 听听听 听 听 听 听 听听听听听听 听听听听听听听听 听听听听听听 听听听 听 [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
Use the Subaru transmission made for the engine
On 2012-04-17, at 20:02, Richard Koerner <rjkinpb@...> wrote: They used to advertise "close ratio transmissions" as a selling point back in the 70's. I'm still not even sure what that means. But I'm guessing winding it out "equally" in all four gears, and then cruise merrily along. I've been advised by an extremely knowledgeable Vanagon guy to NOT change the gears when considering a Subie conversion; a modest tinkering with tire diameters is OK but DON'T change the ratios inside the tranny. [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
Thanks everyone for your responses. I'm quite satisfied with what I've heard so far and all your rationales make sense. Better arguments toward leaving the tranny gear ratios alone and make up the difference with larger rims and tires. The experience in this group is very much appreciated and all your inputs are welcome. Since money is always a bit tight, looks like i will keep my hands off the tranny and put my money in a rim/tire upgrade.
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Cheers everyone, Tom To: subaruvanagon@... From: rjkinpb@... Date: Tue, 17 Apr 2012 19:02:55 -0700 Subject: Re: [subaruvanagon] Regearing 3rd & 4th gear after conversion They used to advertise "close ratio transmissions" as a selling point back in the 70's. I'm still not even sure what that means. But I'm guessing winding it out "equally" in all four gears, and then cruise merrily along. I've been advised by an extremely knowledgeable Vanagon guy to NOT change the gears when considering a Subie conversion; a modest tinkering with tire diameters is OK but DON'T change the ratios inside the tranny. Rich San Diego --- On Tue, 4/17/12, Scott Daniel - Turbovans <ScottDaniel@...> wrote:
From: Scott Daniel - Turbovans <ScottDaniel@...> Subject: Re: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Cc: "Tom Dueck" <glen_burnie@...> Date: Tuesday, April 17, 2012, 6:51 PM I can tell you this .. higher 3rd and 4th gears are not neccessarily better. two cases.. one guy raised his gearing in hopes of better fuel milage as he was spinning something like 3,800 rpm at a good cruise speed. His fuel mileage got worse, not better, going for lower rpm's at cruise speed. ( and 3,800 is not that bad on a 6K rpm engine anyway )_ another case ...I insalled a modified gearbox into an SVX Syncro I had built for a guy. He raised 3rd and 4th .. and in my opinion kinda ruined it. Sure ..with a very tall 4th you can cruise at 75 + more replaxed than with stock gearing. .. but how often does one get to cruise that fast anyway. the real bad part though was.. I'd be drivin' nicely in 3rd ....50ish and rev's were too high for relaxed goin' down the road.. shift into 4th ..lugging . Shift back to 3rd ...more rev's than ideal. There are no 'holes' in the stock gear like this.. the gap between ratios is very important. if one wanted to raise the over all gearing in all gears ( and thus not affect the gap between gears ) that would be fine.. say 10 % worth ...like with taller tires. The gaps between the ratios are quite good the way VW set their manual trans us .. and ...they also match a fat wide torque curve .. which both a waterboxer and a subaru engine have. ( in a wbxr...there's not all that much power ..but you are strong in the power band from about 2,800 to 4,400 rpm , roughly .. subaur is the same way .. good power at say 2,500 on up ..to over 5K rpm .. that matches stock gear ratio gaps very nicely. If anything ...just raise the overall gearing a little, but don't raise just 3rd and 4th. Doing that turned a very nice 'power is nice in all modes.. whether loafing or rippin' vanagon' into one that has holes in its power curve from gear to gear, mainly 3rd and 4th. Scott www.turbovans.com On 4/17/2012 4:42 PM, Tom Dueck wrote: Thanks for your advice, it's much appreciated. There seems to be a mixed consensus on this issue. Tom To: subaruvanagon@... From: eric_rowland1@... Date: Tue, 17 Apr 2012 12:05:42 -0700 Subject: Re: [subaruvanagon] Regearing 3rd& 4th gear after conversion My '91 Westy/Syncro is running a 3.0 conversion w/16" rims and a higher 3rd/4th gear courtesy of Lucas Hofgard in Boulder. The higher 3rd works as intended and the gear spacing between 2nd/3rd is not an issue when driving in town. Even here in the Southern Rockies at 7000 feet with the higher 4th gear I can climb almost any hill at highway speeds and maintain 60/65 in 3rd on those occasions where I need to downshift. From my experience, I'd recommend both changes with a 6 cylinder engine but your 2.5 may have different requirements and your location may present a different set of issues. If your trans is in good shape you can leave it intact and add 16" rims to see if that gives you the upper range you're looking for on the highway. Then tackle the gearing at another time if the rim/tire choice doesn't give you everything you're looking for. --- On Tue, 4/17/12, surfervan91<tomdueck@...> wrote: From: surfervan91<tomdueck@...> Subject: [subaruvanagon] Regearing 3rd& 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 10:00 AM Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
They used to advertise "close ratio transmissions" as a selling point back in the 70's.听 I'm still not even sure what that means.听 But I'm guessing winding it out "equally" in all four gears, and then cruise merrily along.听 I've been advised by an extremely knowledgeable Vanagon guy to NOT change the gears when considering a Subie conversion; a modest tinkering with tire diameters is OK but DON'T change the ratios inside the tranny.
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Rich San Diego --- On Tue, 4/17/12, Scott Daniel - Turbovans <ScottDaniel@...> wrote:
From: Scott Daniel - Turbovans <ScottDaniel@...> Subject: Re: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Cc: "Tom Dueck" <glen_burnie@...> Date: Tuesday, April 17, 2012, 6:51 PM 听 I can tell you this .. higher 3rd and 4th gears are not neccessarily better. two cases.. one guy raised his gearing in hopes of better fuel milage as he was spinning something like 3,800 rpm at a good cruise speed. His fuel mileage got worse, not better, going for lower rpm's at cruise speed. ( and 3,800 is not that bad on a 6K rpm engine anyway )_ another case ...I insalled a modified gearbox into an SVX Syncro I had built for a guy. He raised 3rd and 4th .. and in my opinion kinda ruined it. Sure ..with a very tall 4th you can cruise at 75 + more replaxed than with stock gearing. .. but how often does one get to cruise that fast anyway. the real bad part though was.. I'd be drivin' nicely in 3rd ....50ish and rev's were too high for relaxed goin' down the road.. shift into 4th ..lugging . Shift back to 3rd ...more rev's than ideal. There are no 'holes' in the stock gear like this.. the gap between ratios is very important. if one wanted to raise the over all gearing in all gears ( and thus not affect the gap between gears ) that would be fine.. say 10 % worth ...like with taller tires. The gaps between the ratios are quite good the way VW set their manual trans us .. and ...they also match a fat wide torque curve .. which both a waterboxer and a subaru engine have. ( in a wbxr...there's not all that much power ..but you are strong in the power band from about 2,800 to 4,400 rpm , roughly .. subaur is the same way .. good power at say 2,500 on up ..to over 5K rpm .. that matches stock gear ratio gaps very nicely. If anything ...just raise the overall gearing a little, but don't raise just 3rd and 4th. Doing that turned a very nice 'power is nice in all modes.. whether loafing or rippin' vanagon' into one that has holes in its power curve from gear to gear, mainly 3rd and 4th. Scott www.turbovans.com On 4/17/2012 4:42 PM, Tom Dueck wrote: Thanks for your advice, it's much appreciated. There seems to be a mixed consensus on this issue. Tom To: subaruvanagon@... From: eric_rowland1@... Date: Tue, 17 Apr 2012 12:05:42 -0700 Subject: Re: [subaruvanagon] Regearing 3rd& 4th gear after conversion My '91 Westy/Syncro is running a 3.0 conversion w/16" rims and a higher 3rd/4th gear courtesy of Lucas Hofgard in Boulder. The higher 3rd works as intended and the gear spacing between 2nd/3rd is not an issue when driving in town. Even here in the Southern Rockies at 7000 feet with the higher 4th gear I can climb almost any hill at highway speeds and maintain 60/65 in 3rd on those occasions where I need to downshift. From my experience, I'd recommend both changes with a 6 cylinder engine but your 2.5 may have different requirements and your location may present a different set of issues. If your trans is in good shape you can leave it intact and add 16" rims to see if that gives you the upper range you're looking for on the highway. Then tackle the gearing at another time if the rim/tire choice doesn't give you everything you're looking for. --- On Tue, 4/17/12, surfervan91<tomdueck@...> wrote: From: surfervan91<tomdueck@...> Subject: [subaruvanagon] Regearing 3rd& 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 10:00 AM Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
Scott Daniel - Turbovans
I can tell you this ..
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higher 3rd and 4th gears are not neccessarily better. two cases.. one guy raised his gearing in hopes of better fuel milage as he was spinning something like 3,800 rpm at a good cruise speed. His fuel mileage got worse, not better, going for lower rpm's at cruise speed. ( and 3,800 is not that bad on a 6K rpm engine anyway )_ another case ...I insalled a modified gearbox into an SVX Syncro I had built for a guy. He raised 3rd and 4th .. and in my opinion kinda ruined it. Sure ..with a very tall 4th you can cruise at 75 + more replaxed than with stock gearing. .. but how often does one get to cruise that fast anyway. the real bad part though was.. I'd be drivin' nicely in 3rd ....50ish and rev's were too high for relaxed goin' down the road.. shift into 4th ..lugging . Shift back to 3rd ...more rev's than ideal. There are no 'holes' in the stock gear like this.. the gap between ratios is very important. if one wanted to raise the over all gearing in all gears ( and thus not affect the gap between gears ) that would be fine.. say 10 % worth ...like with taller tires. The gaps between the ratios are quite good the way VW set their manual trans us .. and ...they also match a fat wide torque curve .. which both a waterboxer and a subaru engine have. ( in a wbxr...there's not all that much power ..but you are strong in the power band from about 2,800 to 4,400 rpm , roughly .. subaur is the same way .. good power at say 2,500 on up ..to over 5K rpm .. that matches stock gear ratio gaps very nicely. If anything ...just raise the overall gearing a little, but don't raise just 3rd and 4th. Doing that turned a very nice 'power is nice in all modes.. whether loafing or rippin' vanagon' into one that has holes in its power curve from gear to gear, mainly 3rd and 4th. Scott www.turbovans.com On 4/17/2012 4:42 PM, Tom Dueck wrote:
Thanks for your advice, it's much appreciated. There seems to be a mixed consensus on this issue. |
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Re: Regearing 3rd & 4th gear after conversion
Thanks for your advice, it's much appreciated. There seems to be a mixed consensus on this issue.
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Tom To: subaruvanagon@... From: eric_rowland1@... Date: Tue, 17 Apr 2012 12:05:42 -0700 Subject: Re: [subaruvanagon] Regearing 3rd & 4th gear after conversion My '91 Westy/Syncro is running a 3.0 conversion w/16" rims and a higher 3rd/4th gear courtesy of Lucas Hofgard in Boulder. The higher 3rd works as intended and the gear spacing between 2nd/3rd is not an issue when driving in town. Even here in the Southern Rockies at 7000 feet with the higher 4th gear I can climb almost any hill at highway speeds and maintain 60/65 in 3rd on those occasions where I need to downshift. From my experience, I'd recommend both changes with a 6 cylinder engine but your 2.5 may have different requirements and your location may present a different set of issues. If your trans is in good shape you can leave it intact and add 16" rims to see if that gives you the upper range you're looking for on the highway. Then tackle the gearing at another time if the rim/tire choice doesn't give you everything you're looking for. --- On Tue, 4/17/12, surfervan91 <tomdueck@...> wrote:
From: surfervan91 <tomdueck@...> Subject: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 10:00 AM Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
eric rowland
My '91 Westy/Syncro is running a 3.0 conversion w/16" rims and a higher 3rd/4th gear courtesy of Lucas Hofgard in Boulder. The higher 3rd works as intended and the gear spacing between 2nd/3rd is not an issue when driving in town. Even here in the Southern Rockies at 7000 feet with the higher 4th gear I can climb almost any hill at highway speeds and maintain 60/65 in 3rd on those occasions where I need to downshift. From my experience, I'd recommend both changes with a 6 cylinder engine but听your 2.5 may have different requirements and your location may present a听different set of issues. If your trans is in good shape you can leave it intact and add 16" rims to see if that gives you the upper range you're looking for on the highway. Then tackle the gearing at another time if the rim/tire choice doesn't give you everything you're looking for.
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--- On Tue, 4/17/12, surfervan91 <tomdueck@...> wrote:
From: surfervan91 <tomdueck@...> Subject: [subaruvanagon] Regearing 3rd & 4th gear after conversion To: subaruvanagon@... Date: Tuesday, April 17, 2012, 10:00 AM 听 Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? [Non-text portions of this message have been removed] |
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Re: Regearing 3rd & 4th gear after conversion
Christian Kennedy
On 17 Apr 2012, at 10:28 AM, Don wrote:
As an aside, having ripped the coupling teeth off of the first gear sets of probably a dozen 915 transmissions when fed by much more than 200 - 230HP and 200+ ft lbs of torque I'd suggest caution employing them for a 210HP/200+ ft lb application. While it's possible to massage in some 928.xxx.xxx parts to make the thing less prone to explosion it's still possible to do significant damage if you're not careful. I haven't used a 915 in anything for literally years; I prefer a 930 or G50 filled with Swepco 212 if it's hot or going to be run on the track, Swepco 201 otherwise. -- Dr. Christian Kennedy chris@... AF6AP PGP KeyID 108DAB97 PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97 "Mr. McKittrick, after careful consideration..." |
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Re: Hesitation and poor idle problem fixed
Does your '96 EJ22 have the single port exhaust on the heads?
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On Mon, Apr 16, 2012 at 4:54 PM, eventide411 <eventide411@...> wrote:
** |
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Re: Regearing 3rd & 4th gear after conversion
Yup, I think you guys are on to something as I'm leaning toward the 16" rims with the "Subaru/Vanagon" conversion I'm about to do. Truthfully spoken, my concern was really the higher output Subaru engine linked with the lower HP rated VW transmission.
Tom To: subaruvanagon@... From: dkveuro@... Date: Tue, 17 Apr 2012 17:38:03 +0000 Subject: [subaruvanagon] Re: Regearing 3rd & 4th gear after conversion --- On Apr 17, 2012, at 11:28 AM, Don wrote: I'm pretty sure this thread is going to get "dinged" as not specifically related to Subaru-into-Vanagon subject matter, so take it elsewhere 锟�. but I completely agree with the above. Much easier, and just as effective, to use wheels/tires for "gearing-change" purposes. bob '87 Syncro Westy Subaru H6 3.0 235/70-16 BFG A/T KO'syeah...I agree but I mentioned Subaru and Vanagon as many times as I could ! Waddaya think Tom? |
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Re: Regearing 3rd & 4th gear after conversion
Thanks Bob. The initial request was actually related to a Subaru conversion. I was questioning the higher 2.5L hp Subaru when linked with the lower hp rated VW transmission. I believe I am leaning toward your suggestion.
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Thanks for your insight. Tom To: subaruvanagon@... |
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Re: Regearing 3rd & 4th gear after conversion
Thanks Don, I appreciate your life experience.
Tom To: subaruvanagon@... From: dkveuro@... Date: Tue, 17 Apr 2012 17:28:41 +0000 Subject: [subaruvanagon] Re: Regearing 3rd & 4th gear after conversion --- In subaruvanagon@..., "surfervan91" <tomdueck@...> wrote: .................regear 3rd and 4th in my Westy tranny to accommodate the new engine.Here's what I know: No early diesel engined Vanagon transmission is strong enough for anything over 150 lbs ft torque. Seen two break and one owner was secretly happy it broke so he could install a later trans. Those trans rev's at 60 mph are 4200 to 4500 rpm. The 1.6 diesel was governed to 5200 rpm....VW built it as a city delivery van during the 1980's oil crisis never intending it to run at max for hours on end. The later 1984 up transmissions where prone to spin the 3/4 gear set due to torque loading...VW welded later 89/99 up gear sets. These give 4000 rpm at 70mph on stock size wheels and tyres. Even the later trans will break the hub in the 3/4 gear set over 150 lbs ft torque and will do so more often if low 3/4 gears are installed. The reason being, that at the 60 to 70mph rpm, the engine works harder to maintain speed and therefore more time is spent under peak torque loading. With a more powerful engine this happens a lot. There are companies claiming to build these transmissions to get the rpm's down to 3500 rpm at 70mph and lower with 16 inch wheel/tire combo's. I am of the opinion that keeping the rpm higher will cause less transmission failure because torque loading will be less but i am not going to say that statement is gospel. My experience was as follows...1994 Vanagon ABA 2.0ltr turbo engined ( Yeah I know it wasn't a Subaru.) at 4260 lbs pulling a 2300 lb dual axle trailer with a 3800 lbs Sun Roof Vanagon on the trailer with a spare 2.1 motor in the trailer too. All up weight 10,610 lbs. Transmission was a low reving 4th for 3100 at 60mph. Engine developed 210 HP and around the 200+ft lbs torque. It shed the 3/4 hub after 300 miles ! An extreme case I know, but until I find a different transmission, I will use a stock trans with synthetic gear oil. I'm looking at locating a Delorean Automatic for my next project unless I find a 915 Porsche transmission I can afford. My suggestion is it would be cheaper to get a 14/15 or 16 inch wheel set up with some 29 inch tyres. Others may have different experiences, but cost of 3/4 gears and overhaul is quite high. |
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Re: Regearing 3rd & 4th gear after conversion
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On Apr 17, 2012, at 11:28 AM, Don wrote:yeah...I agree but I mentioned Subaru and Vanagon as many times as I could ! Waddaya think Tom? |
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Re: Regearing 3rd & 4th gear after conversion
On Apr 17, 2012, at 11:28 AM, Don wrote:
My suggestion is it would be cheaper to get a 14/15 or 16 inch wheel set up with some 29 inch tyres.I'm pretty sure this thread is going to get "dinged" as not specifically related to Subaru-into-Vanagon subject matter, so take it elsewhere 鈥�. but I completely agree with the above. Much easier, and just as effective, to use wheels/tires for "gearing-change" purposes. bob '87 Syncro Westy Subaru H6 3.0 235/70-16 BFG A/T KO's |
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Re: Regearing 3rd & 4th gear after conversion
--- In subaruvanagon@..., "surfervan91" <tomdueck@...> wrote:
.................regear 3rd and 4th in my Westy tranny to accommodate the new engine.Here's what I know: No early diesel engined Vanagon transmission is strong enough for anything over 150 lbs ft torque. Seen two break and one owner was secretly happy it broke so he could install a later trans. Those trans rev's at 60 mph are 4200 to 4500 rpm. The 1.6 diesel was governed to 5200 rpm....VW built it as a city delivery van during the 1980's oil crisis never intending it to run at max for hours on end. The later 1984 up transmissions where prone to spin the 3/4 gear set due to torque loading...VW welded later 89/99 up gear sets. These give 4000 rpm at 70mph on stock size wheels and tyres. Even the later trans will break the hub in the 3/4 gear set over 150 lbs ft torque and will do so more often if low 3/4 gears are installed. The reason being, that at the 60 to 70mph rpm, the engine works harder to maintain speed and therefore more time is spent under peak torque loading. With a more powerful engine this happens a lot. There are companies claiming to build these transmissions to get the rpm's down to 3500 rpm at 70mph and lower with 16 inch wheel/tire combo's. I am of the opinion that keeping the rpm higher will cause less transmission failure because torque loading will be less but i am not going to say that statement is gospel. My experience was as follows...1994 Vanagon ABA 2.0ltr turbo engined ( Yeah I know it wasn't a Subaru.) at 4260 lbs pulling a 2300 lb dual axle trailer with a 3800 lbs Sun Roof Vanagon on the trailer with a spare 2.1 motor in the trailer too. All up weight 10,610 lbs. Transmission was a low reving 4th for 3100 at 60mph. Engine developed 210 HP and around the 200+ft lbs torque. It shed the 3/4 hub after 300 miles ! An extreme case I know, but until I find a different transmission, I will use a stock trans with synthetic gear oil. I'm looking at locating a Delorean Automatic for my next project unless I find a 915 Porsche transmission I can afford. My suggestion is it would be cheaper to get a 14/15 or 16 inch wheel set up with some 29 inch tyres. Others may have different experiences, but cost of 3/4 gears and overhaul is quite high. |
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Re: Regearing 3rd & 4th gear after conversion
I'd recommend sticking with stock gearing. It's more fun to drive with the added power, and it will encourage you to stick to lower speeds (which will give you better gas economy.)
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On Apr 17, 2012, at 12:00 PM, surfervan91 wrote:
Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this? |
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Re: Regearing 3rd & 4th gear after conversion
Luke Bakken
I did that when I had Daryl @ aatransaxle rebuild my syncro
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transmission a couple years ago. I run BFG AT K/O 215/75R15 tires as well. I get 20 to 21 mpg when I keep it at 55 to 60 mph. '03 EJ25. There's a pretty big gap between 2nd and 3rd gear, but I like the change. Others on this group have said they prefer stock. On Tue, Apr 17, 2012 at 9:00 AM, surfervan91 <tomdueck@...> wrote:
Hello everyone, I'm a newbie here with my first question. 听I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. 听I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. 听What are people's thoughts on the pros and cons or even the necessity of doing this? |
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Regearing 3rd & 4th gear after conversion
surfervan91
Hello everyone, I'm a newbie here with my first question. I'm about to sink a 2.5L SOHC Subaru into my '91 Westfalia. I've been reading about some people recommending that it's best to regear 3rd and 4th in my Westy tranny to accommodate the new engine. What are people's thoughts on the pros and cons or even the necessity of doing this?
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Bob Stevens
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