Quote:
Originally Posted by Gardus@Supersprint
For the dip, yes, I agree.
For peak power there is a gain without a tune.
We've seen a 15 hp increase at 6000rpm and 11 hp of peak power with catless headers and HFC front pipe.
Then with a specific map made by a Ecutek master tuner here in Italy the car gained ad additional 9 hp of peak power, 218 hp against 198 stock.
The dip is gone obviously.
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when you do the math those gains with out tune are probably below average. If the dyno reads 198hp stock, that basically correlates to crank hp. Crank HP gains are roughly 70% of whp gains. So you have a 5% peak increase over stock (11hp) Just not worth it to me. Especially when stock cars fluctuate +_5% on the dyno. Basically repeatability of the dyno.