Help me understand HP potential of S vs TT

Sh0velMan · 02-14-2013, 03:55 PM

Quote:

Originally Posted by DIGItonium

I'm still sleepy in the morning so I don't type as much, but twin charging will give you the low end response before the turbos kick in. Of course, this setup is a bit more complicated.

So one can setup a Stillen super charger and STS rear mount turbo setup. It was done on the 350Z.

But what about when VTEC kicks in, yo?

TopgunZ · 02-14-2013, 04:12 PM

Quote:

Originally Posted by DIGItonium

I'm still sleepy in the morning so I don't type as much, but twin charging will give you the low end response before the turbos kick in. Of course, this setup is a bit more complicated.

So one can setup a Stillen super charger and STS rear mount turbo setup. It was done on the 350Z.

The reason I asked if that was a smart*** comment is because I was the one who twin-charged my 350..lol.. Well I used a PL kit instead of STS.

The guy with the STS twin charged just sold his to a guy in England. That car never made it to the states.

DIGItonium · 02-15-2013, 09:17 AM

Oh snapz?! That's sick man. How about electric turbochargers?

Quote:

Originally Posted by Sh0velMan

But what about when VTEC kicks in, yo?

Shamu · 02-18-2013, 11:21 AM

Quote:

Originally Posted by SS_Firehawk

With turbo's, there will always be lag when coming on the throttle. Superchargers will have no delay coming on to the throttle, but when the turbo's kick in, there is no comparison to power under the curve. If I were you, I would start looking for dyno's showing when boost starts ramping up and what you find acceptable.

This isn't exactly true. It is highly dependent on setup. Put a couple small quick spooling turbos on a z34 and tune for low end and suspect you would find a car with very little lag but perhaps more limited top end from bigger turbos. Certainly less lag than say a centrifical supercharger running 8psi pulley. Now put a higher psi pulley on your car or put a roots type supercharger on and supercharger may have an advantage to two small turbos.

wstar · 02-18-2013, 11:42 AM

On the other hand, a flatter torque curve is generally a good thing. If you're going for drivability for racing, and staying under a certain HP number for points on your dyno inspection, going for smaller turbos (or smaller SC) tuned for the low end might be your best bet. Give you a wide usable power band and don't even try to go for a tall peak out at the high RPMs.

SS_Firehawk · 02-18-2013, 12:23 PM

Shamu, I'm referring to pedal delay, not boost lag. Definitely agree with what you are saying though.

02-18-2013, 11:42 AM	#35 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	On the other hand, a flatter torque curve is generally a good thing. If you're going for drivability for racing, and staying under a certain HP number for points on your dyno inspection, going for smaller turbos (or smaller SC) tuned for the low end might be your best bet. Give you a wide usable power band and don't even try to go for a tall peak out at the high RPMs. __________________ 7AT Track Car! Journal thread / Car setup details

02-18-2013, 12:23 PM	#36 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Shamu, I'm referring to pedal delay, not boost lag. Definitely agree with what you are saying though. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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