Question on TFS heads

MEDIK418 · 02-22-2003, 01:53 AM

Well, I got the 89 back on the road and man it shifts nice. A little notchy but much better than before. Anyway, my question: My son called tonight and is about to buy a set of TFS heads for his car, The engine already has a Trick flow Track heat intake so he wants to do the same brand head. It has an F303 cam in it and he thinks the cam needs more compression. It already has 9.6:1 forged TRW's in it and I agree that the cam is too much for the engine but he likes the lope. He wants to raise the compression by shaving the heads before the install.
Does anyone know how much "shaving" will have to be done? What is the highest compression he could possibly go while still running pump premium? He's not sure what the chamber CC is but that's easily found. Have any of you done anthing like this and if so, can you shed some light for us?

Thanks for any input you can provide.
In case anyone here is confused, He is in Pensacola and the car is here and I'm trying to get it ready for him to take to North Carolina in a month or so. That's why all the long distance car building.

88workcar · 02-22-2003, 06:50 AM

Four years ago I had a set of Edelbrocs, we shaved .030 off before they ever went on, the car ran on 87octane and went 12teens at 113. With a B cam. If you have valve clearance, do it.

86GT · 02-22-2003, 10:51 AM

I ran Edel. with 1.90's and an F cam with stock pistons. Had around 9.4-9.5 compression. I ran 12.90's that way at 107 and change. I since switched to a TFS Stage 2 cam. If you're not taking too much off the heads I'd say you're fine with the cam clearances. Always check of course. I wouldn't go more than 0.030" because you'll reduce the chamber by roughly 6cc's then. They are 60 to begin with (Someone correct me if I'm wrong). That'll give you lots of compression then.

MEDIK418 · 02-24-2003, 12:13 AM

Thanks folks. He's planning to use his enslitment bonus if it amounts to anything for the heads so I think it'll be about 2 months away.

02-22-2003, 01:53 AM	#1
MEDIK418 Registered Member Join Date: Mar 1999 Location: Amarillo, Texas, USA Posts: 780	Question on TFS heads Well, I got the 89 back on the road and man it shifts nice. A little notchy but much better than before. Anyway, my question: My son called tonight and is about to buy a set of TFS heads for his car, The engine already has a Trick flow Track heat intake so he wants to do the same brand head. It has an F303 cam in it and he thinks the cam needs more compression. It already has 9.6:1 forged TRW's in it and I agree that the cam is too much for the engine but he likes the lope. He wants to raise the compression by shaving the heads before the install. Does anyone know how much "shaving" will have to be done? What is the highest compression he could possibly go while still running pump premium? He's not sure what the chamber CC is but that's easily found. Have any of you done anthing like this and if so, can you shed some light for us? Thanks for any input you can provide. In case anyone here is confused, He is in Pensacola and the car is here and I'm trying to get it ready for him to take to North Carolina in a month or so. That's why all the long distance car building. __________________ 1986 four-eyed LX coupe, 358 Cleveland, Tremec TKO600/centerforce clutch, dish cut Probe forged pistons, comp cams hyd.roller cam, .579/.588@224/230, Edel.performer, 670 holley street avenger, CPR custom built long tubes, ported and polished 4bbl heads, manley valves, beehive springs, MSD peo-billet dist/MSD6AL, fluidamper, 5 lug conv. with 17x8 bullits there's more but it's still not finished yet. Oh, and the oldest boy is turning his 89 GT into a FFR cobra this next summer.

02-22-2003, 06:50 AM	#2
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Four years ago I had a set of Edelbrocs, we shaved .030 off before they ever went on, the car ran on 87octane and went 12teens at 113. With a B cam. If you have valve clearance, do it. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

02-22-2003, 10:51 AM	#3
86GT Sniffed too much n20 Join Date: Oct 1998 Location: Ont, Canada Posts: 1,018	I ran Edel. with 1.90's and an F cam with stock pistons. Had around 9.4-9.5 compression. I ran 12.90's that way at 107 and change. I since switched to a TFS Stage 2 cam. If you're not taking too much off the heads I'd say you're fine with the cam clearances. Always check of course. I wouldn't go more than 0.030" because you'll reduce the chamber by roughly 6cc's then. They are 60 to begin with (Someone correct me if I'm wrong). That'll give you lots of compression then. __________________ 2002 Windsor Weekend Q16 Qualifier

02-24-2003, 12:13 AM	#4
MEDIK418 Registered Member Join Date: Mar 1999 Location: Amarillo, Texas, USA Posts: 780	Thanks folks. He's planning to use his enslitment bonus if it amounts to anything for the heads so I think it'll be about 2 months away. __________________ 1986 four-eyed LX coupe, 358 Cleveland, Tremec TKO600/centerforce clutch, dish cut Probe forged pistons, comp cams hyd.roller cam, .579/.588@224/230, Edel.performer, 670 holley street avenger, CPR custom built long tubes, ported and polished 4bbl heads, manley valves, beehive springs, MSD peo-billet dist/MSD6AL, fluidamper, 5 lug conv. with 17x8 bullits there's more but it's still not finished yet. Oh, and the oldest boy is turning his 89 GT into a FFR cobra this next summer.

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