GTM Performance Engineering 350Z HR SUPERCHARGER KIT PRESS RELEASE
09-13-2010, 01:57 PM
#81
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-Superchargers require back pressure. usually HFC and headers are not a good choice with a supercharger system, they can cause a drop of boost. The stage one kit is designed to accomplish 500 BHP which equal 410 WHP, So far we have made close to those numbers with all factory exhaust and cats components, We are going to be testing with a better exhaust so expect the numbers to be higher .
Sam
Sam
I'm pretty excited about this kit, it looks great! I have a question though relating to what you wrote above. Since I already have Stillen headers and Crawford HFC and Fast Intentions TD exhaust, what does that mean if I were to go with the stage 1 supercharger kit? Would that mean I should expect less WHP (less than 410) because of not enough back pressure? Would it be advised to go back to stock cats and headers?
Another question I wonder about is how gas mileage is affected? Not that it really matters to much to any of us...
Adam
Last edited by acharney; 09-13-2010 at 03:38 PM.
09-14-2010, 07:30 AM
#82
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Backpressure is only part of the equation. Spending $7k then having to run the stock cats and manifold seems quite an oxymoron. MANY cars other than Z's run superchargers with much success with no cats at all. Expelling gases is a very important part of the equation for proper power and lower EGT's. Running a high cpsi OEM cat really is dangerous with boost as you can melt them quite easily...
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
09-14-2010, 07:58 AM
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my thoughts exactly. I was hoping with adjustable cam timing via Uprev Osiris we wouldn't have to worry about this issue.
09-15-2010, 12:34 PM
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Backpressure is only part of the equation. Spending $7k then having to run the stock cats and manifold seems quite an oxymoron. MANY cars other than Z's run superchargers with much success with no cats at all. Expelling gases is a very important part of the equation for proper power and lower EGT's. Running a high cpsi OEM cat really is dangerous with boost as you can melt them quite easily...
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
09-19-2010, 10:33 PM
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i have been waiting for a SC kit like this ever since i bought the Z! im super excited and will have my car paid off by the end of the year! i am running megan racing TP's and the Greddy evo 2 exhaust. i am definately in for the stage 1 kit! when will it be available? also OP, where are you located? any local shops near LosAngeles area i could stop by and get general info/prices and dates?
09-20-2010, 08:33 AM
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I wouldn't hold your breath I ordered and paid for mine in March... I'm thinking we still have another week of tuning left. plus the installation instructions could take even longer. I'm hoping for an early October delivery...at least I'm at the front of the line.
09-22-2010, 11:25 AM
#96
Sam, add some photos of the front with the fascia put back on! Also, as others have said, videos with the car in motion, acceleration, etc would be greatly appreciated. Finally, does anything need to be significantly fabricated/modified for the kit to fit, or is it simple relocation here and there and maybe a few holes drilled?
Sam
So about 430whp with SC and catback? If the G sedan breaks 400whp i'll be super happy
09-22-2010, 11:54 AM
#98
Hey Sam,
I'm pretty excited about this kit, it looks great! I have a question though relating to what you wrote above. Since I already have Stillen headers and Crawford HFC and Fast Intentions TD exhaust, what does that mean if I were to go with the stage 1 supercharger kit? Would that mean I should expect less WHP (less than 410) because of not enough back pressure? Would it be advised to go back to stock cats and headers?
Another question I wonder about is how gas mileage is affected? Not that it really matters to much to any of us...
Adam
I'm pretty excited about this kit, it looks great! I have a question though relating to what you wrote above. Since I already have Stillen headers and Crawford HFC and Fast Intentions TD exhaust, what does that mean if I were to go with the stage 1 supercharger kit? Would that mean I should expect less WHP (less than 410) because of not enough back pressure? Would it be advised to go back to stock cats and headers?
Another question I wonder about is how gas mileage is affected? Not that it really matters to much to any of us...
Adam
Sam
09-22-2010, 12:08 PM
#99
Backpressure is only part of the equation. Spending $7k then having to run the stock cats and manifold seems quite an oxymoron. MANY cars other than Z's run superchargers with much success with no cats at all. Expelling gases is a very important part of the equation for proper power and lower EGT's. Running a high cpsi OEM cat really is dangerous with boost as you can melt them quite easily...
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
Sure a supercharger differs from a Turbo BUT only so much back pressure is needed. Definately waiting for some more results with a more efficient exhaust on the test car. I thought the VHR was the only car running into backpressure problems and that was in regards to the VVEL and valve overlap and not the exhaust itself?
Sam
