OK i need help

[roaddevil]

i have a 1965 289 40 over crowerler street beast cam gt 40 styled heads, that i have been screwing with forever. heres my deal. when i fire her up i am getting a cough back thru the carb. im not her to run with a shit, the timeing is dead on. new chain and all, the valveing is correct and in the corect place. im holding 120 psi per cyl. even across the board. new head gaskets 2x the intake is cool and new lower end. the points are set at .17 with a new condenser. a few differnet coils have been tryed why in the @#$% am i flaming thru the carb. im at a loss.

[old beet]

I'd back the timing off a little.......OLDBEET

[roaddevil]

tryed that tonight i have been acorss the board on timing and to no avail. i tore down the head a couple of nights ago. NADA, next step is a dual the truck and me mono-et-mono and im packing the 45

[AHotRod]

1. Many Ford Performance cams require using the 351W firing order.
2. If it's a Holley carb, your power valve may be blown.
3. A bad or out-of-adjustment accelerator pump will also cause this problem.

[Fat Hack]

Correct firing order? (Small block Fords have two different ones...changing the cam is all that's required to change the firing order. Your new cam may use the newer (sometimes called 351W) firing order. Older small blocks used a different firing order.)

Rocker arms too tight? If so, they can hold a valve open, but that would shown up on a compression check, most likely.

Leak around manifold gaskets? If it's sucking air from the manifold or carb base gaskets, it can create the situation you're experiencing.

Aside from cam and ignition timing, those are a few other ideas I can toss ya to get ya started on the road to solving your problem.

Hope ya get it licked!

[roaddevil]

holy bat shit if it s just the firing order it will blow my mind. THe carb i thought about the power valve so i replaced it. and then i wondered about the rest of the carb so i rebuilt it..

Do you have the fireing order for the 351 off the top of your head.?
Thanks for the help guys

[roaddevil]

Hey it worked wooo hoo Thnaks guys. email or pm me your mailing address please.

[Smokin Joe]

Learn something new every day. Whudathunkit. http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif
I'm a Chevy guy, now I know why! http://www.jalopyjournal.com/ubbthreads/images/graemlins/wink.gif
Hope RACEFAB's got the firing order right on my new motor! http://www.jalopyjournal.com/ubbthreads/images/graemlins/wink.gif