I think you may need a tune after a ported TB
08-09-2008, 10:00 AM
#22
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No, he's not. He doesn't have the headers on his car yet. Regardless if he had full bolt-ons or not, there's nothing to tune for if the only change he made was a ported throttlebody. You might pick up 2-3 horsepower out of it by just installing it, but again, you cannot tune for simply a ported throttle body. It's like trying to tune for bigger/better plug wires.
08-09-2008, 10:04 AM
#23
No way a ported TB allowed a 27HP gain on it's own. If any tune is done to a stock car, potentially it's because GM richens the tune a bit to be on the safe side and that you can lean it out to gain more HP, but a ported TB is not worth 27 HP. I'd be hard pressed to say it gains even 2-3 HP considering that is barely 1% of a stock powered LS1 at the wheels and much smaller than the standard deviation you can get between dyno runs.
08-09-2008, 03:48 PM
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No way a ported TB allowed a 27HP gain on it's own. If any tune is done to a stock car, potentially it's because GM richens the tune a bit to be on the safe side and that you can lean it out to gain more HP, but a ported TB is not worth 27 HP. I'd be hard pressed to say it gains even 2-3 HP considering that is barely 1% of a stock powered LS1 at the wheels and much smaller than the standard deviation you can get between dyno runs.
