NightmareTA

iTrader: (20)

Hey guys. My car is currently set up for 11 PSI on 15* timing with a conservative AFR running pump gas. I am wondering now that I got my boost controller...can I simply add straight meth and size the nozzle to compensate the AFR for say 14-15 PSI without touching the tune? I'm assuming the straight meth will act just like adding fuel...only issue I can see is getting the nozzle size right for the boost increase. Anybody have any input on this theory??

68 SS

iTrader: (23)

You are asking for trouble, lots of people have done what you are thinking about and yes it works but the return for the risk is simply not worth it. Get it tuned for the higher boost and use the meth as an aid not a crutch.

stock48

iTrader: (17)

Either way if crutch or tuned for it, if it fails = same result.....

71 chevy

iTrader: (18)

Use .5 lbs of meth/water for every lb of fuel you run and you are golden.i suggest meth to water in a 70/30 relationship

NightmareTA

iTrader: (20)

Thanks for the replies guys. I know meth is not perfect and it's got it's quirks, but I want more power out of the car from where it's at. Currently I'm at 11 psi, 11.3 AFR, 15* timing. Not sure how much boost it'll take on pump gas before it gets dangerous, but I'd like to run more. Anybody think it'll take 13-14 PSI on straight pump gas? Motor is 8.6:1 since it's got 317's and I have ARP head studs.

I know a lot of guys either run meth or E5 on the boosted 5.3's, but unfortunately E85 is not common at all around my parts and my only option would be meth if I wanted to up the boost.