Modified Intake Idea! Input welcome
Just a bit of info;
Ive tested a 102mm TB and a 75mm TB back to back on a 500hp LS engine. The difference was 5 fwhp across the board. Lets do quick math, 27mm difference, 5hp. 5/27 = .185hp per mm. Your looking at going 10mm x .185 = 1.85hp gain going from the 80 to the 90mm. This is all assuming your engine requires 500hp of air and your intake gains like the FAST does.
Like said above, the power is in the runners and not the TB opening.
Ive tested a 102mm TB and a 75mm TB back to back on a 500hp LS engine. The difference was 5 fwhp across the board. Lets do quick math, 27mm difference, 5hp. 5/27 = .185hp per mm. Your looking at going 10mm x .185 = 1.85hp gain going from the 80 to the 90mm. This is all assuming your engine requires 500hp of air and your intake gains like the FAST does.
Like said above, the power is in the runners and not the TB opening.
Last edited by SweetS10V8; Jan 27, 2012 at 09:35 AM.
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From: Langley AFB (Hampton VA)
My backup plan is to go with an 85mm throttlebody, but I can upgrade to a 92mm for less than $150. Seems like a simple decision to me and will give me something custom .
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From: Langley AFB (Hampton VA)
Well Im waiting for the TB flange to arrive, but I have the new piece of pipe cut and ready to be put onto the intake. I am going in for a surgery tomorrow so I will be unable to do very much until I recover from that. For the throttle cables, Im going to trim around the bracket thats already on there and the new pipe will be welded onto them as well.
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From: Langley AFB (Hampton VA)
The mailman delivered a nice little part today. I have the intake cut and ready to go to the welders monday morning. The welder wants to mount the flange onto the original snout and then bore it out from there and it looks to have plenty of room.
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From: Langley AFB (Hampton VA)
I havent finished cleaning the inside opening out yet. But currently the measurement is 89mm across and 91mm vertically. Im going to finish it to a 92mm opening all the way into the plenum.
