OK HERE GOES 1-MENACE I AM STILL FIGUREING MY CALCULATIONS ON FACTORY UPPER PULLEY ON LIGHTNING WHICH IS 2.93 NEXT 2.85 & 2.80 OK FACTORY STOCK BOOST IS 8# SO HOW MUCH WILL 2.85?? UPPER PULLEY PRODUCE WHAT IS THE DIFFERENCE IN MM OR INCHES JUST TRYING TO COMPUTE THESE FIGURES BUT MY INTELENGENCE LEVEL DOES NOT GO THAT HIGH BUT I KNOW YOURS DOES THANKS FOR YOUR HELP TOM

 

Why are you yelling?

 

I guess for people like my self and you who are a little short on brains enough said ha ha/ p.s . wana ask a another stupid question

 

Whoa, missed this one..
I didn't make this table or calculations, and I'd give credit to whoever did, But I don't know where I got it OR who made it.

Now with a stock lower and a 2.85 upper ONLY.
you will have the following:
Measured in INCHES! (2.85mm??? doesn't make sense)

http://www.msu.edu/~nawrock3/BlowerRPM.xls

Stock diameter is 7.4"

2.81% overdriving the eaton over stock
24.2 optomistic PSI over stock

7.4 lower pulle size
2.85 upper pulley size
2.81% overdriving the eaton over stock
24.2 optomistic PSI over stock
9.2 Optomistic PSI gauge
0.7 Best Guess PSI OVER STOCK
0.7 added blower drag
4 added blower drag
7 gain in torque over stock
7 gain in HP over stock

Blower RPM v Engine RPM

12982 5000
13242 5100
13502 5200
13761 5300
14021 5400
14281 5500
14540 5600
14800 5700
15060 5800
15319 5900
15579 6000

 

I-Men Guns + l owners = best combo.

 

Thanks 1- menace for your replys my 2003 svt lightning has 6# lower 285.upper which i just installed with diablo sport chip modified airbox single blade throttle body i am just not as sharp as i use to be i will be 66 years old next birthday thanks again tom

 

Glad to see some 'ol timer gear heads still enjoying their L's!

I know I'm going to be one of those old guys running around in some sort of hopped up fast car

 

Nothing like a lightning strike to charge your battery No 1 corvette and camaro killer nothing like a lightning/

 

hey no problem, that's what we're here for....