Have the tuner take the IAT spark timing down -4 Degrees (example) in the IAT Spark -40 column, then Wire in a resistor / relay set up to the IAT sensor so when you arm the system it signals the PCM that its -40 and it pulls whatever amount of timing you pull out of it. Once you try it and get the right resistor to trigger it it works AWESOME. Google it, the info is out there. Why risk detonation and knocking those weak pistons out of it.

 

you guys the get to use a dyno as if it was free sure are cool the guy here charges 500 for 4 pulls weather its right or not then its another 500 for 4 more pulls and so on

 

He's got the market cornered I guess huh. Isn't more like 150 or so for 3 average for most places? Haven't paid much attention but that's high!

 

I did a friendly grudge race about two weeks ago, completely bone stock 03 4.8 we threw on a 125 nozzle and some tr6 plugs..... used the entire bottle that night and it was a blast..... but that's as far as Id push my luck with out pulling any timing

 

Listen to this guy^^. If the tune was bone stock I dont think it'd blow up on a 100 shot based on what I've READ of other people doing, but do it right the first time. Don't go on hopes and dreams if you're not willing to blow it up.

 

i run 200 on a completely stock 2008 5.3L, its on a XJ cherokee, 23 degrees, VP fuel on the NOS fuel cell

 

according to cold fusion nitrous you dont need to pull any timing at all untill you reach 150 then its only 2 degrees per 50hp over that

 

100 shot max with at least 1 step colder plug(tr6,br6ef). The iat mod is a great way to have the best of both an NA and nitrous tune. I ran 100 shot for a couple years with tr6 plugs and GOOD tune. Check plugs until you get it right.