GT Motorsports: 370Z Supercharger system development

shumby

thanks for the PM's Z

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Originally Posted by SAM@GTM
Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living .
Sam

G37Sam

WOW! It takes a stage 3 to put down 420whp?

What happened to the initial released estimations, I remember reading numbers in the 600+

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RCZ

It just might be. Could you explain how 5psi manifold pressure aka cyl pressure is different whether its a turbo creating the pressure or a sc creating the pressure?

I am a little confused as to how the same amount of PSI makes more power depending on what is creating that pressure. I always knew that bigger turbos had to work less because they flow more, therefore they can force MORE air into the same space more easily. Thats why a bigger turbo will have a much easier time making 40psi than a tiny one which would have to spin itself into kingdom come to generate 40psi.

However, that hardly explains anything. So please someone explain to me how "boost isnt boost".

420whp is almost 100% power increase over stock. Can we stop throwing numbers around? There's no backing to these claims. 420whp on some dynos is 350whp on other dynos too. I'm not too thrilled about someone other than the mfg coming out with some real numbers.

Are we to take these numbers seriously GTM? Its funny when numbers are released by a customer before the manufacturer.

G37Sam

You could have two compressors blowing air at the same pressure but one could be flowing twice as much air as the other.. the one flowing more air will obviously see higher hp numbers.

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BalanBro

Turbo's don't make pressure, they just blow air. The pressure that we see on our boost gage is a direct result of this blown air "building up" between the compressor outlet and the intake manifold. While different turbos have different flow capability and efficiencies, two identical engines with the same manifold pressure will have the same net flow rate into each cylinder regardless of the turbo that's being used.

When you hear about a smaller turbo falling on it's face, it typically means that it has reached or exceeded it's optimum efficiency, and you would see a decrease in the manifold pressure when this happens. A large turbo will make more power here simply because it can provide the necessary cfm to maintain the predetermined pressure level as set by the wastegate.

Keep in mind that high cfm almost always means turbo lag. Therefore the ideal setup would be the smallest turbo that would efficiently provide the necessary cfm for your target HP level. Any bigger would just increase lag with a marginal at best increase in peak power.

SAM@GTM

We are still testing with the Stage one supercharger that comes with C38-61 Trim. so i have no idea where the stage 3 came in the picture at this point .

Sam

budakai

Wow I have no life....I actually saw this post appear 10 secs ago.

SAM@GTM

Also i do have new dyno numbers that i will be posting shortly, just need to do some cleaning on the afr's

Sam

budakai

Good Stuff.

budakai

Hey sam, how are things going with the project?

SAM@GTM

Making a supercharger kit for this application is not easy. it is very complex car with very sophisticated engine and ecu.
Making a supercharger kit in General is much much harder and more complex then making a turbo system. and also making adjustment to anything in a supercharger system (especially in the initial stages of the project)is a lot more time consuming then a turbo system .

having said all that .the project has been a complete success so far, for a lot of reasons

-Supercharger belt is tracking very well
-No belt slippage issue what so ever
-No flex of any of the brackets and mounting hardware
-Excellent results for such a low boost
-Excellent torque curve
-the system has made close to 100 HP over stock on factory exhaust and cats @ only 5 psi

So you tell me how's the project going

budakai

Wooooooooboooyyyyy Hold onnn hold on

m4a1mustang

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shumby

z eliminator did not say theses were GTM's numbers he is only speculating and said as much in his post.

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Originally Posted by SAM@GTM
Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living .
Sam

DannyGT

GG 420 with stage 1?!?!~ OMGOMG let the speculations continue!!!!

ROFL in all serious, relax people...if they build it, we will cum.

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