massred98gt

hey guys. i got my tune from brenspeed today and loaded it to my car. Wasn't to impressed with it. the canned tunes that came with my tuner seemed to be just as good. I'm going to advance the timing all the way throughout the rpm range on the brenspeed tune, but there is an option to tweak the global spark. what exactly is this? if i advance the global spark would that apply to the whole rpm range ontop of the other advancements.

Soldier GT

What mods do you have? My tuner did wonders for me...

massred98gt

pretty much the same mods as u except i have ported non-pi heads, pi cams, and pi intake same as u other than that

Pohatu18

strange i have a few mods such as CAI TB/plenum, O/R H/ SLP loudmouths with everything else stock and it felt like a whole new car literally and im only using the 87 octane tune.
cant wait till i do a PI swap and 4.10 gears

sstang

Going from one canned programmer tune to another wont make much of a difference. (I call it "canned" b/c your car was not tuned in person on a dyno, even if you gave your specific list of mods). All most canned tunes do for a bolt on GT is increase timing, thats where most of any power gain comes from, so there is only going to be a little variance between canned tunes, unless someone is just way off.

I have a Brenspeed canned tune and it's decent. The difference wasn't that much going from the stock tune, I didn't expect it to be, but after you drive around on the tune for a while, flash it back to stock and you will probably feel like the car is just slightly slower.

DeathRattle

My understanding is that global spark affects spark at all rpms (idle, part throttle, full throttle)...when you see the spark listed for a specific rpm range, then it only affects WOT...

massred98gt

so global spark affects timing at every throttle position. while the rpm range options only affects it at wot. didnt know that. i'm going to try to max out the global spark i think max is 4 degrees advanced. if theres no pinging im good right