exaust/maybe other issue

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Aug 20, 2007 | 10:59 PM

86BroncoGuy

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exaust/maybe other issue

i built a 331 stroker for a Mercury, and i cant find an exaust leak but it sounds like i have one could it be the timeing, or somthing like that im kinda new at this this was my 1st attemt at building a complete high out put engine

thanks for anyhelp/tips you might have

Aug 21, 2007 | 08:20 AM

Kemicalburns

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From: Bend,OR

efi or carb? headers or stock manifolds?

Aug 21, 2007 | 08:28 AM

86BroncoGuy

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edelbrock 650 carb with stock mustang 5.0L shorty headers (ported)
MSD-6al box, Pro Billet Distributer, superconductor wires
Edelbrock-Aluminium Heads, Alum. intake, Carb, and cam

Aug 21, 2007 | 10:14 AM

Kemicalburns

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From: Bend,OR

perhaps the timing is to far advanced, whats the comp ratio and what grade fuel are you running

Aug 21, 2007 | 11:06 AM

86BroncoGuy

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comp ratio is about 9.5:1-10:1 should be closer to 10:1
it has old gas(1+ year old) in it probably 89 but i put in a lot of octane boster 4 or 5 cans for a little less than a half tank

Aug 21, 2007 | 12:16 PM

86BroncoGuy

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i dont think the cam timing is off but i guess its possible would it be the cam or distributer, or both

Aug 21, 2007 | 01:12 PM

Kemicalburns

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From: Bend,OR

could it be a lifter tick you hear? i would remove that gas, replace the fuel filter and start with some fresh fuel as well.

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Aug 21, 2007 | 02:25 PM

86BroncoGuy

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i got some more symtoms...
1.wet hissing sound kinda like boiling (when running or not) from cylinder#4 each time it comes up in the rotation (this seems to be the problem, but what causes it?)
2.cyl.#4 is where the exaust leak like sound comes from
3.fouled-out plugs
4.abnormaly strong smell of fuel in engine compartment