Originally Posted by Kurtz
AFAIK the ECU has no idea what octane fuel you're using... all it knows is if it's knocking or not.
So if you're not knocking on 91 (and shouldn't be) I can't imagine why "higher" octane would do anything for you at all.
Cooler intake charge sure, but you're not going to get anything from the octane boost unless the car is knocking on pump gas, which it shouldn't be...
I'm kinda having a hard time with this subject. All thats being done is cooling the intake air. I know thats the idea and can see how a big differance can be made on a 100 degree day. But anything below 50 degrees I would think this would be a waste of time.
There is almost no chance of the computer adding timing. So the only gain factor is A/F ratio change.
Kurtz- This ^^ A/F change would be noticed and adjusted. I agree that the knock sensor would pull timing and as much data logging as I've done with piggy back systems I have never seen a stock ECU add timing. Thus gains will be almost none.
I'm sure I would have seen 2-5% gain with my S/C setup but N/A on these motors? I'm not sold.
Originally Posted by jgbackes
In the old days, the MAF was a heated nichrome wire. The air passing over it cooled the wire and the ECU could compute the amount of air being delivered past the throttle body (TB).
If you put the meth/water (MW) injector in front of the MAF, will it notice that there is more/cooler air going past? One of the photos I saw put the injector after the MAF and before the TB. What's the best location?
Don't put anything across the MAF on the ISx50. Or you'll lose alot of power like 100%, lol / Tow truck / New MAF