heading to the track this weekend and ill be spraying my 100 wet shot, i want to try out my 150 shot but i am a little hesitant about doing so because my computer is tuned from pcm for less for the 93 octane tune and i have no way of pulling timing out as car is all stock, but i do have 1 heat range colder plugs and i will be running a mix of 5 gallons VP 105 and about 7 gallons of sunoco ultra 94 octane, so should i go ahead and try it since ill have race fuel in it, the 100 shot doesnt even phase the motor so im thinking the 150 shot on a mix of race fuel would be ok, what do you guys think??

 

anyone??

 

You will be fine. Start off on the 100 shot and work with it for a while. Then if you know how to handle it start boosting it up to the 150 shot. As for timing it will do it auto. the fuel is pulled from the fuel rail and then the nitrous is mix together. That will tell the pcm to pull timing and a 150 shot is the max for stock LT1.

Vinny

 

stock pcm will only pull timing if it see's knock. 2 heat ranges colder on the plugs would help.

Try it,but listen for detonation and back off if you hear any. Should be fine,but i always like the ability to be able to pull some timing on the spray.

 

so i guess i should be ok then, how would daily driving be with plugs 2 heat range colder on basicly a stock car

 

daily driving is fine. my car runs the same n/a with the cold plugs as it did with stock 1's.

 

Ditto what Dirk said. I have Autolite 103's, which are 2 heat ranges cooler than stock. The car runs great NA and on the dope. NX 175 shot. Good luck.

 

thanks boys, i might have to trade in my 104's for some 103's before i head out this weekend... ill also post my times saturday when i get back...

 

my buddy picked up my fuel for me today, actually he got me 5 gallons of VP 115 so i toped off the tank with 10 gallons of ultra 94, will it hurt anything using the 115 octane? the guy at the station said i would be fine with the rest mixed with 94 octane just figured i would ask here...

 

Well your o2's probably won't like the lead in it but you should be fine. You'll just shorten the life of your o2's a little no big deal. I know plenty of people who run racegas mixes and they don't have any real issues.