How do you do it? I constantly see people talking about how their truck will light up the tires on command, but my truck at 600 hp won't do it. What am I missing here? Even stock turbo trucks are making these claims. What do you do to get your turbo to spool so quickly that you can light up your tires from a dead stop without boosting it? Anyone care to share and teach me something new?
Tuning for throttle response and turbo spool-up
- Thread starter JoshH
- Start date
What tune are you running JOsh? a modified mcrat race or what?
With my McRat Race if I punched it from a dead stop I would spin welll into 3rd gear. On the highway at 70mph in the rain I could get sideways.
Damn.... I miss that feeling
With my McRat Race if I punched it from a dead stop I would spin welll into 3rd gear. On the highway at 70mph in the rain I could get sideways.
Damn.... I miss that feeling
He's got twins and a 58 converter. It should scare you from 40 mph roll and boil 'em from a dead stop.
If the trans is fresh and you got fuel available its the tune and could be a number of things, call Pat send him the tune and let him look it over for ya.
Good luck Josh.
more fuel pressure down low will make your throttle response faster as well as highed desired tq values at lower rpms and desired fuel (mm3). if you are having trouble spooling to turbo(s) add a little pulse at the desired range and drop the timing a touch. also do some trans tuning to get out of first as fast as possible and lockup a little earlier in second to really break the tires loose when you mash the go pedal.
jmho
jmho
and fueling.. between 30-50mm3 range
with 265 i could bark the tires under les then 30% off a light..
now with 35" it gets little squirmy but doesnt bark. probly will when i change to 4.10 gears
Josh mine from a dead stop and no boost will roll about maybe 10 feet than blows the tires off. I usually don't like letting it keep shifting but have once before and let out after the speedo hit 75 mph. From about 30-35 mph I can break the 285 loose just by mashing it. I know with my turbo blanket and the driver side medium duty manifold and up pipe it spools quicker when I don't boost it from the git go. If you'd like we can trade setups:hug:
:hug:
The same thing happens with me. It takes about 3 seconds. It seems like even with the turbo no spooled the engine should still go as long as it isnt overfueled.
It seems like the stock tuning could take a lot more advantage from using the turbo vanes better. I have never seen a difference from timing no matter if im tuning a gas or a diesel. Maybe we can find out more about the LLY hesitation.
If you go WOT from idle my truck will barely move untill 3 seconds later when the turbo starts to spool.
It seems like the stock tuning could take a lot more advantage from using the turbo vanes better. I have never seen a difference from timing no matter if im tuning a gas or a diesel. Maybe we can find out more about the LLY hesitation.
If you go WOT from idle my truck will barely move untill 3 seconds later when the turbo starts to spool.
My LLY got that way towards the end of me having it.... prob something was about to blow LOL. It did have a bad water pump seal and headgaskets when I ditched it.
Ok, let me make something clear. I have stripped my truck and run 265s on PYOs and can light my tires up from a dead stop with no boost. There was even one instance a while back when I was behind a guy going 45 in a 65, and when I got on it to pass him, I left two black marks across the center line as I crossed it to go around him. The thing is, when I am at full weight with the 285s on H2s it doesn't react the same way. I'm not sure if I'm overfueling it down low or what. It would always blow a lot of smoke when I floor it from a stop, and then it would just take off. Maybe I'll just have to play with it when I have it running again.
try pulling a little fuel out. a lot of people say just add timing and fuel but i disagree. if you are adding timing and fueling that you cant use say because of greater weight and rolling mass, you are shooting right past that portion of the tune in the map. So in essence its worthless to have that much fuel and timing. By pulling timing out you will build boost quicker. Its been discussed at length. Overfueling will bog it down and pretty much equates to a big fat loss because you are losing fuel pressure and missing the powerband with your injection timing and pulse. Does that make any sense?
I have had good luck with pulling alot of timing out down low. I actually add fuel down low to help build egts and spool quicker but this is for a bigger single charger
I know the LLY has a bigger exhaust housing which makes them a little slower to spool compared to the lbz & lmm charger.
nitrous under smart control would be my vote. Performance is limited at first by a chicken or egg conundrum.