GT Motorsports: 370Z Supercharger system development

SAM@GTM · 02-27-2010, 06:08 PM

Quote:

Originally Posted by Red370

The top end hp numbers are good, but the TQ is extremely lacking, TQ is what powers you through turns, i'll say that whoever makes the most low end TQ between this and the Stillen kit, is gonna be the one who gets my hard earned cash.

How much torque are you expecting ?

Sam

Red370 · 02-27-2010, 06:56 PM

Quote:

Originally Posted by SAM@GTM

How much torque are you expecting ?

Sam

I'd like somewhere between 340-350.

Buddy Revell · 02-27-2010, 07:20 PM

Quote:

Originally Posted by Red370

I'd like somewhere between 340-350.

340-350 ft. lbs. to the wheels is about what TT'ed VQ37's put out at 6-7 psi. That's probably an unrealistic expectation for a centrifugal SC that builds up boost in a more linear fashion compared to twin-turbos that hit full boost much lower in the rpm range.

DannyGT · 02-27-2010, 07:32 PM

Quote:

Originally Posted by Buddy Revell

340-350 ft. lbs. to the wheels is about what TT'ed VQ37's put out at 6-7 psi. That's probably an unrealistic expectation for a centrifugal SC that builds up boost in a more linear fashion compared to twin-turbos that hit full boost much lower in the rpm range.

He's 20whp shy of that right now with everything else stock...I dont see a problem with reaching that number when you consider everything else that will be added/retuned for.

Buddy Revell · 02-27-2010, 07:52 PM

Quote:

Originally Posted by DannyGT

He's 20whp shy of that right now with everything else stock...I dont see a problem with reaching that number when you consider everything else that will be added/retuned for.

It's currently at 314 ft. lbs., and it's a bit harder to increase torque than peak whp with a centrifugal SC kit.

Red370 · 02-27-2010, 09:01 PM

Quote:

Originally Posted by Buddy Revell

340-350 ft. lbs. to the wheels is about what TT'ed VQ37's put out at 6-7 psi. That's probably an unrealistic expectation for a centrifugal SC that builds up boost in a more linear fashion compared to twin-turbos that hit full boost much lower in the rpm range.

Its completely realistic with a centrifugal supercharger, the Vortech kits for the 350Z were making 440whp with 352 ft./lbs, our engine displaces more than the 3.5L, which leads me to believe that 350 ft./lbs is a very realistic number. I dont understand how we can have a larger engine and make less power with the supercharger. And BTW, this was using the same V-3 blower that Stillen is using.

Buddy Revell · 02-27-2010, 09:10 PM

Quote:

Originally Posted by Red370

Its completely realistic with a centrifugal supercharger, the Vortech kits for the 350Z were making 440whp with 352 ft./lbs, our engine displaces more than the 3.5L, which leads me to believe that 350 ft./lbs is a very realistic number. I dont understand how we can have a larger engine and make less power with the supercharger. And BTW, this was using the same V-3 blower that Stillen is using.

The numbers on Vortech's site are not to the wheels. Notice how they compare their numbers to the 350Z's factory bhp and torque ratings.
http://www.vortechsuperchargers.com/view.php?pcat=15

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