Quote:
Originally Posted by nikitopo
The dyno is what it is. A before and after measurement of a vendor's pulley kit installation. A 2-8whp increase depending the rpm range is not a huge difference. You might feel it a bit, but it will not change totally the car as I mentioned already. If your model cannot explain the result there are the following options:
1. Vendor doing the dyno is lying and favoring a bigger difference
2. Theoretical model is incorrect
You invited me here and I was polite to reply. What is the GTFO acronym? Please explain ...
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I didn’t realize the dyno you posted was Todas pulley set.
1. Yes all vendors lie and over hype their product.
2. Yes the Toda underdrive pulley set does work/make measurable gains. Bcs it’s underdriving alt/water pump, not bcs of its weight or being lighter. I assumed this thread was about weight reduction on pulleys. Not underdriven pulleys.
I have posted the math on previous threads. So I’ll just give numbers here.
15% underdriven alt pulley will had .65whp 15% underdriven water pump will add 1whp. Obviously 0 crank hp, but less parasitic leach from the two accessories.
I haven’t looked at the % Toda underdrives if it’s diff then the 15% fensport pulleys you can just do the conversion math.