FK-8 camshaft

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mlrailguy
Posts: 265
Joined: Sat Nov 16, 2002 3:01 am

FK-8 camshaft

Post by mlrailguy » Sun Jul 02, 2017 11:59 am

Is any body running this cam? If so, what kind of timing are you set at? I have a 2332 dual 48's 1.4 ratio rockers. Also running Pertronix distributor, with factory springs, set at 32 BTC at 3000 rpm. I'm having problem with engine coming back to idle speed, after running hard, then pulling over to stop. It stays at 3000 rpm. The linkage is not sticking.

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dustymojave
Posts: 2011
Joined: Tue Dec 02, 2008 12:08 am
Location: Lake LA, Mojave Desert, SoCal

Re: FK-8 camshaft

Post by dustymojave » Mon Jul 03, 2017 2:14 pm

Might have a vacuum leak.
Richard
Lake LA, Mojave Desert, SoCal
Speed Kills!, but then...So does OLD AGE!!
A.R.T.S. OffRoad Race Tech Inspection
MDR / MORE / Glen Helen BajaCup Challenge
AKA: MojaveRacer208
'58 Baja with 815K Miles and counting

mlrailguy
Posts: 265
Joined: Sat Nov 16, 2002 3:01 am

Re: FK-8 camshaft

Post by mlrailguy » Mon Jul 03, 2017 3:09 pm

Just picked up a couple rebuild kits, hopefully this will help

mlrailguy
Posts: 265
Joined: Sat Nov 16, 2002 3:01 am

Re: FK-8 camshaft

Post by mlrailguy » Thu Jul 06, 2017 10:53 am

Got them rebuilt, and running 100% better. Still need to get accelerator pumps adjusted. Not pumping till throttle is wide open. Also noticed that arm on backside of one carb had gotten bent and was not letting throttle plates close completely, couldn't figure out why the rpm's wouldn't come back down after a ride. Also the other carb had a loose nut on throttle arm. It was just enough to cause problems.
Any way, back to timing. Still learning. I've been told to advance it as far as it will go, and still restart easily. Also, I am running the Flamethrower billet distributor. I don't know anything about advance curves. It came with a lot of springs and tabs for setting up. I have all the stock settings still.

mlrailguy
Posts: 265
Joined: Sat Nov 16, 2002 3:01 am

Re: FK-8 camshaft

Post by mlrailguy » Thu Jul 06, 2017 11:32 am

here is pic of pump adjust
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dustymojave
Posts: 2011
Joined: Tue Dec 02, 2008 12:08 am
Location: Lake LA, Mojave Desert, SoCal

Re: FK-8 camshaft

Post by dustymojave » Sun Jul 09, 2017 8:46 pm

Normally aspirated gasoline fueled air cooled VWs rarely like more than about 30° total advance. Alcohol fuel or nitro might lead to slightly different advance. Maybe even turbo or blower could have some impact on it. But old school "advance 'til it won't start and back off 'til it will" is a recipe for engine damage.
Richard
Lake LA, Mojave Desert, SoCal
Speed Kills!, but then...So does OLD AGE!!
A.R.T.S. OffRoad Race Tech Inspection
MDR / MORE / Glen Helen BajaCup Challenge
AKA: MojaveRacer208
'58 Baja with 815K Miles and counting

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