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Unit 5302 · 07-15-2002, 09:21 PM

Okay #1 The Street Warrior or Trophy Stock or whatever the heck they want to call it now cars are running low low 11's at 120mph on stock GT-40P heads at full weight, basically. Yes they're running high compression, and they are limited in choice of cams ect. Those cars are every bit capable of dynoing at 340rwhp. That's over 400hp at the crank. Cams that aren't crazy, and stock GT-40P's with a lot of compression. Take the compression away to milled GT-40P's and they might give up 40hp or so.

TFS TW heads are great. They flow 255cfm, not 320cfm. Fully ported TFS TW's might get 280-290cfm. I can't ever see them hitting 320cfm+. That's maybe where the AFR 205 hangs out. The aluminum head will save you 25lbs. Whoopee doo. That's 0.0025 in the quarter. If you want to be really optimisic, 1/2 a tenth. They also require the use of an improved radiator if you won't want overheating problems.

The GT-40P heads are high velocity, good torque heads which offer significantly more power than stock E7TE's. The crate engine with the B303 or E303 cam is rated at 320hp. So no. A stage 1 GT-40P setup with the extra's is not optimistic at 320hp. Are low 12's with these heads realistic? In a full weight car and normal suspension mods, no. If you lose some weight and get some real good suspension and you have the rest of the combo? Yes.

If you have a car that's dynoing 290hp (240rwhp) with GT-40P's and all the rest with a 103.5 trap, it's broken. That's all there is to it. A stock fox with a killer driver can trap 100mph. So unless you feel like telling me all the mods you made were good for 35hp, I'd have to say something's wrong.

As for the doing things once, that's a great idea. Figure out what you want the car to do, and list the rest of the combo so we can all quit playing guessing games, and pick the best head for you of the two.

Example. You have a GT-40 Intake and a .500 lift 220 duration cam. The GT-40Ps are the better choice.

Example. You have the TFS Street heat and a .540 lift cam with 225 duration. The TFS TW's are the much better choice.

07-15-2002, 09:21 PM	#26
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Okay #1 The Street Warrior or Trophy Stock or whatever the heck they want to call it now cars are running low low 11's at 120mph on stock GT-40P heads at full weight, basically. Yes they're running high compression, and they are limited in choice of cams ect. Those cars are every bit capable of dynoing at 340rwhp. That's over 400hp at the crank. Cams that aren't crazy, and stock GT-40P's with a lot of compression. Take the compression away to milled GT-40P's and they might give up 40hp or so. TFS TW heads are great. They flow 255cfm, not 320cfm. Fully ported TFS TW's might get 280-290cfm. I can't ever see them hitting 320cfm+. That's maybe where the AFR 205 hangs out. The aluminum head will save you 25lbs. Whoopee doo. That's 0.0025 in the quarter. If you want to be really optimisic, 1/2 a tenth. They also require the use of an improved radiator if you won't want overheating problems. The GT-40P heads are high velocity, good torque heads which offer significantly more power than stock E7TE's. The crate engine with the B303 or E303 cam is rated at 320hp. So no. A stage 1 GT-40P setup with the extra's is not optimistic at 320hp. Are low 12's with these heads realistic? In a full weight car and normal suspension mods, no. If you lose some weight and get some real good suspension and you have the rest of the combo? Yes. If you have a car that's dynoing 290hp (240rwhp) with GT-40P's and all the rest with a 103.5 trap, it's broken. That's all there is to it. A stock fox with a killer driver can trap 100mph. So unless you feel like telling me all the mods you made were good for 35hp, I'd have to say something's wrong. As for the doing things once, that's a great idea. Figure out what you want the car to do, and list the rest of the combo so we can all quit playing guessing games, and pick the best head for you of the two. Example. You have a GT-40 Intake and a .500 lift 220 duration cam. The GT-40Ps are the better choice. Example. You have the TFS Street heat and a .540 lift cam with 225 duration. The TFS TW's are the much better choice.