? about internals

Squints · April 25th, 2008, 06:17 AM

i've read several posts here and elsewhere that claim the pistons in my car won't work with an aftermarket cam. any truth to this? i'm just wondering cause the guy i bought it from knew zero about the car and was no help as far as what was done to the engine. i found a list of mods a while back that the owner before had put in. Lunati Cam was one of them. didn't say anything about which cam it was though. but with a lunati cam, and edlebrock heads, would it be safe to assume that the internals aren't stock?

nba1341 · April 25th, 2008, 06:23 AM

you have flat top pistons which i guess run into problems when running different cam, heads

someone will come in here and tell you more about that im sure

trueblue01 · April 25th, 2008, 10:50 AM

I used an F-303 in an '86 GT motor with the stock '86 heads and a Trick Flow spring up-grade. That motor is still running around in a Ranger with no problems. I used head gaskets that were .042 thick and had the clearance needed. If you don't go bigger than that you should be fine.

Squints · April 25th, 2008, 11:02 AM

Originally Posted by trueblue01

I used an F-303 in an '86 GT motor with the stock '86 heads and a Trick Flow spring up-grade. That motor is still running around in a Ranger with no problems. I used head gaskets that were .042 thick and had the clearance needed. If you don't go bigger than that you should be fine.

i'm not changing anything. just wondering if it's more than likely that the internals were upgraded when the heads and cam were put in.

trueblue01 · April 25th, 2008, 02:16 PM

Depends on which cam and which heads. Could still have a stock bottom end. The F-303 cam is .512 / .512 lift with 1.6 rockers.

Squints · April 25th, 2008, 02:38 PM

Originally Posted by trueblue01

Depends on which cam and which heads. Could still have a stock bottom end. The F-303 cam is .512 / .512 lift with 1.6 rockers.

all i know is lunati cam, edelbrock heads. don't know which ones though. i've been trying to get ahold of the guy i bought it from, to try and track down the previous owner, but haven't been able to reach him.

and ".512 / .512 lift with 1.6 rockers" might as well be japanese. i'm not what you would call an aficionado.

April 25th, 2008, 06:17 AM	#1
Squints Enthusiast 1986 Mustang GT Join Date: Dec 2007 Location: Chesapecker,VA Posts: 758	? about internals i've read several posts here and elsewhere that claim the pistons in my car won't work with an aftermarket cam. any truth to this? i'm just wondering cause the guy i bought it from knew zero about the car and was no help as far as what was done to the engine. i found a list of mods a while back that the owner before had put in. Lunati Cam was one of them. didn't say anything about which cam it was though. but with a lunati cam, and edlebrock heads, would it be safe to assume that the internals aren't stock? __________________ MILITARY CREW AT2

April 25th, 2008, 10:50 AM	#3
trueblue01 Enthusiast 1989 Mustang LX 10.98@126.7 NA Join Date: Feb 2008 Location: N.E. Ohio Posts: 659	I used an F-303 in an '86 GT motor with the stock '86 heads and a Trick Flow spring up-grade. That motor is still running around in a Ranger with no problems. I used head gaskets that were .042 thick and had the clearance needed. If you don't go bigger than that you should be fine. __________________ Never fast enough.

April 25th, 2008, 02:16 PM	#5
trueblue01 Enthusiast 1989 Mustang LX 10.98@126.7 NA Join Date: Feb 2008 Location: N.E. Ohio Posts: 659	Depends on which cam and which heads. Could still have a stock bottom end. The F-303 cam is .512 / .512 lift with 1.6 rockers. __________________ Never fast enough.

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April 25th, 2008, 06:23 AM	#2
nba1341 Banned 1965 Mustang Fastback Join Date: Apr 2007 Location: Los Angeles, Cal Posts: 24,982 Posts: 2,195	you have flat top pistons which i guess run into problems when running different cam, heads someone will come in here and tell you more about that im sure

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