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Power?

 

So the resto is done and I'm at the point where I have to put out all the little fires. The big one is top end power. Im new to an F head in a truck. I live on a road that is 20 degree slope. I can't go up it faster than 20mph and at times have to stop and shift to first. Top speed on the flat is 42. First gear 0 to 20, 2nd is 20 to 30 3rd is 30 to 40-42.
What has been done, efi distributor, new plugs and wires, new resister, new solex carburetor, new fuel pump. New alternator and battery. New plastic fuel tank, filter.?
Any thoughts, could the coil cause it?
 

I would check the jets for proper mixture. Too rich or lean will rob power. Also check the timing curve. Something else you might want to consider is advancing the timing a couple of degrees. Under heavy load with your right foot on the floor you won't have any vacuum advance and your engine might need more advance than the centrifugal advance is giving it.

John?
56 Pickup TKER TOY?
Graham Wash.


On Fri, Jul 12, 2024 at 7:00 PM, jay bernhardt
<bitrootvz@...> wrote:
So the resto is done and I'm at the point where I have to put out all the little fires. The big one is top end power. Im new to an F head in a truck. I live on a road that is 20 degree slope. I can't go up it faster than 20mph and at times have to stop and shift to first. Top speed on the flat is 42. First gear 0 to 20, 2nd is 20 to 30 3rd is 30 to 40-42.
What has been done, efi distributor, new plugs and wires, new resister, new solex carburetor, new fuel pump. New alternator and battery. New plastic fuel tank, filter.?
Any thoughts, could the coil cause it?
 

Jay,
When you say "Top speed on the flat is 42", do you mean the engine won't rev any higher or that's as far as you are willing to push the throttle... Our wagon tops out at about 50-55 mph but will go faster if I want to tempt fate - at 60 mph it brings back mortal memories of a young lad on a Norton 750 Commando (clearly, since I'm writing this, he was protected by several Guardian Angels). As you know there are many variables at play here, throttle linkage; engine timing; differential ratio; tire size; grabby brakes; number of chords of wood in the back; head wind; etc.etc.
I don't know what can be expected out of an F-head engine like yours, in a pickup - what do other operators say?
Cheers, Pavel up North.
 

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Start with checking the compression of all four cylinders
Bill

Get

 

All are 120psi


On Sat, Jul 13, 2024, 2:17?PM William Hickey via <billhickey=[email protected]> wrote:
Start with checking the compression of all four cylinders
Bill

Get

 

That's as Fast as it goes with the pedal to the metal. An incline of any amount drops me down big time.


On Sat, Jul 13, 2024, 11:48?AM willyswagon230 via <pavelb=[email protected]> wrote:
Jay,
When you say "Top speed on the flat is 42", do you mean the engine won't rev any higher or that's as far as you are willing to push the throttle... Our wagon tops out at about 50-55 mph but will go faster if I want to tempt fate - at 60 mph it brings back mortal memories of a young lad on a Norton 750 Commando (clearly, since I'm writing this, he was protected by several Guardian Angels). As you know there are many variables at play here, throttle linkage; engine timing; differential ratio; tire size; grabby brakes; number of chords of wood in the back; head wind; etc.etc.
I don't know what can be expected out of an F-head engine like yours, in a pickup - what do other operators say?
Cheers, Pavel up North.

 

Could it be something as simple as the linkage not allowing full throttle? Revving in neutral, how does the engine respond?
PuN.
 

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Jay, just took out the overhauled Fhead 4 wagon, runs great, a few (dozen) leaks to chase, power is good.? In terms of top speed with an Fhead, mine would difficult if it didn't have an overdrive. Without it, beyond 40 would be difficult; with it cruising 50-55 works, a tailwind helps.? These were stock on the 2 wd models.?

From: [email protected] <[email protected]> on behalf of jay bernhardt <bitrootvz@...>
Sent: Saturday, July 13, 2024 1:20 PM
To: [email protected] <[email protected]>
Subject: Re: [WillysTech] Power?
?
That's as Fast as it goes with the pedal to the metal. An incline of any amount drops me down big time.

On Sat, Jul 13, 2024, 11:48?AM willyswagon230 via <pavelb=[email protected]> wrote:
Jay,
When you say "Top speed on the flat is 42", do you mean the engine won't rev any higher or that's as far as you are willing to push the throttle... Our wagon tops out at about 50-55 mph but will go faster if I want to tempt fate - at 60 mph it brings back mortal memories of a young lad on a Norton 750 Commando (clearly, since I'm writing this, he was protected by several Guardian Angels). As you know there are many variables at play here, throttle linkage; engine timing; differential ratio; tire size; grabby brakes; number of chords of wood in the back; head wind; etc.etc.
I don't know what can be expected out of an F-head engine like yours, in a pickup - what do other operators say?
Cheers, Pavel up North.


--
Dan

53 2wd Wagon
Eugene, OR
 

Thanks


On Sat, Jul 13, 2024, 7:25?PM Dan Mulholland via <mulhollanddr=[email protected]> wrote:
Jay, just took out the overhauled Fhead 4 wagon, runs great, a few (dozen) leaks to chase, power is good.? In terms of top speed with an Fhead, mine would difficult if it didn't have an overdrive. Without it, beyond 40 would be difficult; with it cruising 50-55 works, a tailwind helps.? These were stock on the 2 wd models.?
From: [email protected] <[email protected]> on behalf of jay bernhardt <bitrootvz@...>
Sent: Saturday, July 13, 2024 1:20 PM
To: [email protected] <[email protected]>
Subject: Re: [WillysTech] Power?
?
That's as Fast as it goes with the pedal to the metal. An incline of any amount drops me down big time.

On Sat, Jul 13, 2024, 11:48?AM willyswagon230 via <pavelb=[email protected]> wrote:
Jay,
When you say "Top speed on the flat is 42", do you mean the engine won't rev any higher or that's as far as you are willing to push the throttle... Our wagon tops out at about 50-55 mph but will go faster if I want to tempt fate - at 60 mph it brings back mortal memories of a young lad on a Norton 750 Commando (clearly, since I'm writing this, he was protected by several Guardian Angels). As you know there are many variables at play here, throttle linkage; engine timing; differential ratio; tire size; grabby brakes; number of chords of wood in the back; head wind; etc.etc.
I don't know what can be expected out of an F-head engine like yours, in a pickup - what do other operators say?
Cheers, Pavel up North.


--
Dan

53 2wd Wagon
Eugene, OR

 

Congratulations on the successful rebuild, Dan! :o) Willys was sure ahead of its time; even today I can't think of a manufacturer who supplies a tailwind a standard equipment in their cars. <g>

On 7/13/2024 4:25 PM, Dan M wrote:
Jay, just took out the overhauled Fhead 4 wagon, runs great, a few (dozen) leaks to chase, power is good.? In terms of top speed with an Fhead, mine would difficult if it didn't have an overdrive. Without it, beyond 40 would be difficult; with it cruising 50-55 works, a tailwind helps.? These were stock on the 2 wd models.
--
John <jkohnen@...>
It is a great art to saunter. (Henry David Thoreau)
 

Willys tech guides at Kaiser WIllys can help--here's the one for lack of power:



(Have to thank Kaiser for putting so much technical information online and readily available)

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