GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE

Phimosis

I would say the answer is yes, based on: http://www.power-enterprise.co.jp/ro...rotrex/C38.pdf

The unit is rated for 865 cfm of flow, compared to 1150 cfm rating for the Vortech unit used in the Stillen kit. That number is relative though, based on the pressure map. The pressure map in the above referenced .pdf file shows the efficiency range as a % efficiency. You can get it to make 11 psi of boost, but not very effieciently and the volume of air flow will be much lower than its max of 865 cfm. Or, you can go to the other end of the extreme and get 865 cfm of flow, but with no boost, which is also inneficient as a compressor. The "sweet spot", or peak effieciency, is where you are getting good boost and good cfm of flow. The rationale for using this smaller compressor is that you can gear it high and spin it very fast, so that it builds boost at a lower engine rpm, but then in the upper rev range, the boost doesn't keep building.... it just kinda plateaus. If you use a big compressor and spin it fast, you get too much boost at high rpm, potentially causing engine failure. If you use a big compressor and spin it slower so boost is ideal at redline, the boost level in the midrange will be much less than ideal and performance will suffer.

Phimosis

I agree with you 100%. I didn't comment directly on that aspect, but it's part of the same issue. So the converse is that with a smaller sc unit, if you increase flow by reducing restriction, the boost number goes down. Additionally, I'm not even saying using the smaller unit is bad. It allows for peak boost to be achieved at lower rpms and makes the powerband more useable.

DannyGT

I dont care one way or another, I just want good usable power. I will be trying it out both ways. Additionally, I just got nice little gift from a friend - a brand spanking new AEM water/meth kit. Supposedly these are no joke...We already tore apart my trunk last night to get ready for the routing.

I should take a poll on this but I know Sam knows best. I'm still not sure where to tap into...different points will require a completely different way at looking how to 'custom' tune it. I may go the safe route and just put 2 small nozzels after the mafs just for the purpose of cooling the charge (distilled water)

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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

RCZ

direct port into the manifold.... How come you are using meth?

DannyGT

The AEM unit was given to me by a friend as a gift. So why not make use of it no?

Besides, maybe this will give us some new insight for others to either try it or stay away. Oh and I dont think i'll go meth, just water injection. I just want to have a cooler charge, I dont want to have to completely change the tune or rely on the meth for added tuning.

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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

DannyGT

Well, usually just by significantly cooling the charge there is a 8-12whp gain from it without tuning.

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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

Chris@FsP

But you are also displacing air/fuel mixture with water vapor.

RCZ

Yeah, I for one Im eager to see what you can do with it. I was just asking to see if you were going to try and crank up the boost. There are no power gains from just adding WI alone...

Neo187H

Out of curiosity what is the upper effienceny range of the stage 1 unit on this car? 500 crank HP as listed on the front page? Wouldn't that be right around the 8 psi that is supplied with it? Obviously there are many factors involved in all of this so I don't expect a precise answer, just something general.

Also, dumb question but what kit is being installed on cars and sent out, stage 1 correct? Stage 0 has yet to be installed or sold for any cars?

G37Sam

Could be, but oustide its efficiency range though?

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Zsteve

I just want to see some kits installed already and see how they are performing. Lets get it on!!!!!!!

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2010 LS3 C6 Silver coupe corvette

Nismo374

Does anyone know if you will have enough space to have a engine oil cooler with this supercharger kit? As the intercooler and supercharger oil cooler seem to take up most of the room in front.

travisjb

that was answered somewhere in the first 10 pages pretty clearly... yes

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2009 370Z #104
*For Sale*

DannyGT

Sorry I'm late with this...here is a quick preview of the parts laying on my lovely carpet, rofl.

It might take awhile to process it was just uploaded...

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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

DannyGT

My god, I sound retarded...

Sorry, I'm filthy and pulling an all-nighter with a friend of mine trying to get as much done as possible. I just came in shot the video and posted it, no editing, nothing. Anyway - let me know if you want to see anything specific or have any other questions...

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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)