Will cam work

I have a 318 with flat top pistons and stock J heads . Will a .292/.509 cam work ? Problems ?

  • Yes

    Votes: 1 20.0%
  • No

    Votes: 0 0.0%
  • Problem

    Votes: 4 80.0%

  • Total voters
    5
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1968 S

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I have a 318, flat top pistons, factory J heads. I would like to install a .292/.509 cam. Will this work ? Problems ?
 
What is the measured static compression ratio? Stall of converter if an automatic? Axle ratio and tire size? If you just dropped on a set of J heads with their larger combustion chamber without putting in a taller piston you lowered your compression ratio. That much duration of cam will move your peak torque higher up killing the low rpm torque so low gears and higher stall converter will be necessary or it will be a dog off the starting line.
 
Physically, yes, it will work fine. You can advance the camshaft timing down around 100 or even 98* ICL and that will help. It will sound nasty as all hell.

That said, I wouldn't use it either, unless I already had it and didn't want to buy something else. But yes, it will certainly work.
 
3.91 to 4.30 rear gear and a 3600 to 4200 stall converter you should be in business!!:thumbsup: also like rusty and others say advance that stick by 6 or 8 degrees and smoke some bowties & ford turds!!:)
 
A HAHAHAHAHAHAHAHAHAHAHAHAHAHA!!

Sorry, I couldn't help myself.
You will need about 11/1 compression.
You're current parts if stock, are at about 8/1
If you brought the pistons up to the top of the deck, you might get 8.6/1.
And if you used the .028 gasket, you might get 8.8
And if you got some closed chamber,big valve heads, you might get 9.6
If you need that much power, you need a bigger engine. And it will be cheaper to build,to maintain,and to operate. It will have way more torque, need way less stall,and be waaaay more streetable.
Unless you stroke it,that will cost more,lol

But to answer your question,"will it work";
In a dragrace car yes.In a really lightweight car,maybe...
In a 75 Dart SE hahaha
On the street, you will grow to hate it, and it won't take long.The power doesn't even start until 4000, and it could still be pulling at 7000. The powerband is very narrow, not at all suited to an automatic.
You will have to follow the break-in instructions to the letter to not wipe the lobes at start-up.
With 3.73s;4000 is about 34mph,7000 will be 59 mph at the top of first, and your cruise will be about 3000@65.

Now, a question for you: why do you ask?
 
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