i have a 2006 s/c ss i have stage two on there along with hahn full exhaust (header back) i also have the polyeurathain transmission mounts. and a injen and i was wondering what else i should do for engine performance. i feel like im at a lost on engine upgrades.

 

smaller pully?

 

how much smaller should i go and if i do that will it mess up my reflash

 

i'm def no expert on the LSJ, but it does seem to be a popular change to make.

 

go 2.8 or 2.7 they are both popular sizes... im running the 2.8 i love it

 

If you switch to a smaller pulley, you may want to look into HPTuners.

 

If you go with a 2.9" pulley, you should net about 1.5 pounds of extra boost. This setup will run fine with the stage 2 reflash and belt.


It also couldn't hurt to look into getting cooling mods: https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/official-cooling-thread-59987/

 

Suggestion>>> Do the dual pass Setup with another H/E before you throw anymore heat thru the manifold! It will sustain More HP Longer without Heat soak!

 

What is your goal for your car? Power wise?

 

i would like to brake in to 12's and be over 300 wheel power. any suggestions

 

What is required in order to use a 2.8" pulley?

 

any idea what ill run in the 1/4 if i go down to a 2.8 pully with all my mods

 

go with a smaller pully like 2.5, meth injection, 60lb injectors, ported blower, cai and full exhaust. With a good tune you'd have a shot at 300.

 

u wont have to get a machined snout.. it bolts right up.. nething under 2.8 requires a machined snout.. all u need is the pulley system which u can get from pulley boys for $100

if u dropped down to a 2.8 u would gain roughly 10hp.. they say every .10 u go down u gain 5hp.. u might run a high 13 in the 1/4

 

Actually guys have run mid 13s with ST2 and a 2.8 pulley. GM ST2 alone can net a high 13 second pass, if you have some skills.

 

Stage2 with 2.8 might be pushing it, I wouldnt go under 2.9 without cooling and monitoring. Get your IAT cooling in order before you mod too much, temps are killer on these motors. And 300 is hard to do on the stock blower w/o N2O I have read, be careful....

 

GM Stage 3 w/50 shot

 

2.85 from zzp and stage 2 is good setup

 

yea driving does play a factor.. its hard to get it down pact.. i've been to the track several times and have been driving since i could walk and i still have a lil trouble launching my car..

 

2.6 pulley, heat exchanger, dual pass intercooler, spark plugs, HP Tuners, and maybe a nitrous system

 

do you know where i cpuld find a machined snout or is it a do it your self?

 

if you're looking for a smaller pulley, nherbst454, makes them that fit the stg2 hub - no snout needed... word is though - don't go smaller than 2.9 (2.85 very smallest) to be safe w/stg2 tune

 

Yea I think I am going with a 2.85" pulley from Nate with one step colder plugs. What do some of you guys think about this set up?

 

nice mods ..i loike the hahn exhasut but its too steep for me

 

u can get the machined snout from intense-racing.com..