help on choosing a cam.

Topic: help on choosing a cam. (Read 1742 times) previous topic - next topic

help on choosing a cam.

May 06, 2008, 01:49:10 PM

i need help choosing a cam for our 85 tbird sefi h.o conversion but we think it still has the stock cfi cam.i have a cam in mind it is the lunati voodoo 268 part # is 638-61003lk.now about the car it is an 85 tbird it has a 308 with a e5 head and a e7 head an 90 mustang intake throttle body and egr spacer it has a set of 19lb injectors the motors been rebuilt recently.it has a stock tranny w/converter and a stock rearend with 3.08 gears.any help would be appriciated

help on choosing a cam.

Reply #1 – May 06, 2008, 01:59:15 PM

Youre running two different heads on the same motor?

help on choosing a cam.

Reply #2 – May 06, 2008, 02:16:34 PM

yup,it was like that when we bought it :hick: .i plan on putting a set of ported e7s on though or some afr 165s or 185s with a trickflow trackheat intake also plan on a mass air conversion.

help on choosing a cam.

Reply #3 – May 07, 2008, 12:43:19 PM

Did you ever get that thing running?

help on choosing a cam.

Reply #4 – May 07, 2008, 02:42:35 PM

yes sir.its running rich cuz of the small ass cfi cam,atleast thats what i was told.

help on choosing a cam.

Reply #5 – May 07, 2008, 07:52:46 PM

Quote from: superpinto;217501

yup,it was like that when we bought it :hick: .i plan on putting a set of ported e7s on though or some afr 165s or 185s with a trickflow trackheat intake also plan on a mass air conversion.

How did that happen? I can see having a bad head but only having one E7 to put on, whats the odds of that happening lol..

Anyway for my old 302/306 combo I really enjoyed the hell out of the tfs-1 cam with the eddy heads and cobra intake. Nice idle and good powerband. For the E7 heads and HO intake I would just run a stock HO cam, why spend the cash for little hp gains and loss of drivability just not worth it in my opinion. You could take that money and get some nice headers, 3.55/3.73 gears or something to support future mods.

help on choosing a cam.

Reply #6 – May 07, 2008, 08:20:47 PM

it has a flat tappet cam,i think im going to save up for the intake and then some heads.im going to do a 5 lug conversion using a rear from a 94-98 mustang,and spindles from a 94-95 mustang cuz i know where one is.

help on choosing a cam.

Reply #7 – May 07, 2008, 08:39:41 PM

Oh my bad I thought 85 was a roller. Saving up and buying what you want the first time around is the best thing you can do. Less money and time wasted that way.

help on choosing a cam.

Reply #8 – May 07, 2008, 08:52:00 PM

they were,but we got a flat tappet motor

help on choosing a cam.

Reply #9 – May 12, 2008, 02:21:48 AM

First off if you're running 2 different heads how do we know that this conversion was in fact a true HO?

Second, You're running a flat tappet block and cam which riases the question of your firing order....What is the firing order of this car? What computer are you running? Which injectors?

Something's not adding up for your rich condition...a "small ass CFI cam" isn't the reason, at least not by itself. You have another issue.

help on choosing a cam.

Reply #10 – May 12, 2008, 07:25:31 PM

Wrong cam/firing order with an ho eec.
Not sure, but is the combustion chamber on both e5-e7 the same size???????
That can definetly cause some issues due to different compression from one side of the engine to the other.
I'd say start over and just get yourself a complete ho out of a wrecked stang for 500 bucks and don't waist your money on a flat tappet cfi block.
By the time you buy a cam,timing chain and gaskets you might as well spend the 100-200 extra and get an engine that will run better and out perform your current setup.

help on choosing a cam.

Reply #11 – May 12, 2008, 07:40:46 PM

Quote from: superpinto;217494

i need help choosing a cam for our 85 tbird sefi h.o conversion but we think it still has the stock cfi cam.i have a cam in mind it is the lunati voodoo 268 part # is 638-61003lk.now about the car it is an 85 tbird it has a 308 with a e5 head and a e7 head an 90 mustang intake throttle body and egr spacer it has a set of 19lb injectors the motors been rebuilt recently.it has a stock tranny w/converter and a stock rearend with 3.08 gears.any help would be appriciated

If the stock CFI cam is in it, its not, in fact, and HO conversion. Do you know what computer is in the car? I'm willing to be that it is a standard output computer because the stock CFI cam uses the same firing order as the standard output 5.0. The High Output uses a different firing order.

The reason you are running rich is most likely because of the computer, and the 19lbs injectors. If you put 14lbs injectors in it, it would probably run right.

Tell us more about your conversion.

help on choosing a cam.

Reply #12 – May 13, 2008, 11:48:04 PM

i ment the intake is ho sorry i was in a hurry.it has a so computer,itit also has so firing order.i plan on different heads.the guy we had the heads redone by said e5 and e7are pretty much the same witch i dought.

help on choosing a cam.

Reply #13 – May 14, 2008, 07:31:42 AM

if you're running the stock cam and the SO computer, then why are you running 19 pound injectors!? I assume you have no adjustable regulator as well....There is your problem.

help on choosing a cam.

Reply #14 – May 14, 2008, 03:37:23 PM

I think this only can happen in texas.But the car is rust free!!