akcrash

I have an '03 Silverado SCSB with a 4.8, mods are intake, MAF, TB spacer, cat back and a predator tuner (long tubes coming soon). I wasn't satisfied with the options on the Predator so I just got hooked up with EFI live. I looked at the tune that I'm running and it says I'm only running 18 deg. That sounds a bit on the low side to me and I'd like to bump it up but I'm not sure how much is "safe" to go with. I live in Alaska and the best fuel you can get from the pump here is 90. Any advice?

dirt track racer 81

iTrader: (45)

ditch the aftermarket maf and tb spacer..as they are junk..about 20-22 is bout all youll get before you get knock..get a cam and you can get 27-28

akcrash

Damn, I was hoping I could go to at least 22.

dirt track racer 81

iTrader: (45)

well command 22 degrees..log a wot run and see if you can any knock on your efi live scan tool

03sierraslt

iTrader: (22)

Ya 18 is low, I get 18-19 degrees at WO with my blower.

Klive

iTrader: (4)

28ish should be fine with NA

dirt track racer 81

iTrader: (45)

i highly doubt that..if he had a cam yea he can... every stock truck ive tuned will only take around 23-24 on 91 before it gets knock and it is audible

2k5Squirrel

iTrader: (3)

i think i get about 34 @ WOT. i'll go take it for a spin and find out. readings will be done off an interceptor.

dewmanshu

iTrader: (4)

Interesting. I've messed with a couple stocks and I like 24-26. No kr and it felt strong enough that the driver was happy. 91 in your area shouldn't suck that bad I'd think.

Klive

iTrader: (4)

sounds like a gas problem to me too dew...our 91 here is some good ****!