here are some dyno of the same engine as i did mods to the 03 suburban 5.3 and 4l60 trans
this is when it was all stock with stock ls1 exhuast manifold cutout closed and open


this one is when i added the weiand ls6 intake and a comp cam 222/224 567/569
as you can see now it makes power all the to 6500

now this is with the same set up as above with a garret gt42r turbo /60pound injectors and base speed density tune
blue line are with 4 pounds of boost and the red is with 8 pounds of boost




and this are just pics of the car

 

Numbers look good. How conservative is the 8psi tune? I think my friends stock 5.3 at 9 psi made 570's whp thru but i think with meth inj. Cam id expect a tad more but good nonetheless

 

yeah its on the safe side right now i forgot it also has a resonator and also depend on the dyno were i take it to,to get tune is dynos higher than my friend dynojet .also go do meth injection in the future. all the dyno charts that i posted
are from the same dynojet

 

Nice, one day i will boost a LS, but not yet. Why the newer front nose and older GFX? Or is it just me?

 

yep your right,86 trans am with the 91-92 front end

 

I got two questions.With any turbo,isn't it limited to 92 octane gas only??. And doesn't turbo's require more frequent oil changes because the turbo's are so reliant on good clean oil but coke the oil up faster because of heat??.

 

You can run whatever gas you want as long as you tune for it. Oil gets hotter and turbo bearings would be more susceptible to damage from dirty oil so more frequent changes wouldnt hurt but you could install inline filters on the feeds to keep particles out if thats an issue

 

Thanks for the reply Orr.Guess your talking waste gate for tuning.The numbers these guys are talking must be the best pump gas you can get.You guys have a retard system for the ignition on the top end??. I would think the cam grind is for a turbo only.

Sorry guy,I am just as curious as a cat on somethings and honestly don't mean to hi-jack you thread.

 

yeah all the dyno were done using 91 octane pump gas.all the tunning is through a the stock gm ecu.and the is a off the shelf cam from comp cam LS1 XR275HR-12

 

i would like to see other ls turbo dyno to compare

 

My buddys truck

Stock 5.3 longblock with cam and twin 62-1's pump gas plus meth inj

http://www.unitedgearheads.com/showthread.php?t=12422

http://www.unitedgearheads.com/showthread.php?t=12473