Hello, I have a question im not sure if this is the right area to post in but we'll see, i have a 04 lifted on 37" tires and curently i have 4.56s in the rear, i am not to happy with them at all and was thinking about 4.88s but now im putting a vortech SC on it and was wondering what everyone recomends? thanks

 

Big tires and serious gears! If re-tuning is not too hard to come by, I would take the wait and see approach. Lower gears will help the Vortech spool quicker, I'm sure.

 

for the very small difference between 4.56 and 4.88 i wouldnt bother...thats alot of money for that small of a change and honestly you will barely feel a difference. I think you will be happy once you get some boost goin.

 

Thanks Paralyzer, thats what i needed to know i really didnt fell much of a difference when i went to the 4.56s from the 3.73 but i noticed my gas get better. and ya gears are expensive i need to save that money for the brakes now

 

make sure it's an inter(after)cooled system...

run larger injectors and get a good tune, a tranny shift kit won't hurt anything either

 

That Vortech will make enough to throw rods...

My aftercooler vortech kit on 12lbs did 450rwhp/450ftlbs on a conservative tune. I would leave the gears you have in there.

 

are you running stock internals? the Vortech kit i have comes with the aftercooler and injectors as long as the programer, but i didnt think i was able to get numbers like that from it

 

Yes, stock from throttle body to oil pan. Stock Transmission at that.....

 

what would i have to do if you dont mind me asking to make numbers like that? is it at a safe level for a daily driver if that makes any scence? i know i need a smaller pulley, and a dyno tune but did you add anything else? thank you

 

what would i have to do if you dont mind me asking to make numbers like that? is it at a safe level for a daily driver if that makes any scence? i know i need a smaller pulley, and a dyno tune but did you add anything else? thank you

 

You might have to throw on a boost a pump....

Smaller belt and smaller pulley...

I was running an electric fan and true dual 2.5" exhaust through the exhaust manifolds, factory cats, and Magnaflow dual in/out.

That is actually a very conservative tune... We saw numbers that began with 5 and backed it down. I drove at this power level for nearly 40k miles. I took it off to go a different route, but the blower was stout that's for sure.

 

ok i like the sound of that, is the boost a pump the lil thing that supplies the fuel pump with a constant 14volts ? do you know a good place to find one of these at?

 

bought my used from my tuner. Check SVTperformance or the like for deals.

 

do you know weather the 20 amp or 40 amp?