GTM SC installs reviewed

Zat_Zuma · 11-01-2010, 12:31 PM

Sorry to hear that Shumby ....... hope it all works out for you

efuseakay · 11-01-2010, 12:50 PM

Quote:

Originally Posted by shumby

level 10?

PM'd you, but I'll share with everyone else as well...

Infinity

I know they misspell Infiniti, but these guys are great.

fstrnldr · 11-01-2010, 01:05 PM

I've heard mixed things about level 10, I have no personal experience with them though. I would do some research in the Supra world.

weiboy718 · 11-01-2010, 01:32 PM

Wow, I just made a few call's for shumby and the tranny out here cost 10,803. That's crazy expensive!

RCZ · 11-01-2010, 01:34 PM

I told him about OS Giken transmission, hopefully it was released already and is less than 10k.

Buddy Revell · 11-01-2010, 02:15 PM

Quote:

Originally Posted by DannyGT

Not sure, I'm going to a friends shop to see what he has from some of his track cars and test them out. He has a dyno on hand too so I should be able to get some results while I am there. Most likely I'll have that done on Thursday, late afternoon.

Sounds good. Good luck, bro.

Buddy Revell · 11-01-2010, 02:18 PM

Quote:

Originally Posted by christian370z

Do the GTM kits come with that plastic Bosch BPV? I used to run that stock in my old Saab 900 and once I got up to 360hp and 20+psi, it would flutter because the internal spring was simply not up to the task of holding back that boost or releasing it effectively.

I would definately move onto another BPV; I have had great experience with Forge personally.

Have you seen the GTM vids that show what the flutter sounds like? Did the flutter on your old Saab sound similar?

weiboy718 · 11-01-2010, 03:00 PM

Can the fluttering be compressor surge?

wishihadnav · 11-01-2010, 03:08 PM

Quote:

Originally Posted by weiboy718

Can the fluttering be compressor surge?

i dont think so..compressor surge would normally result in some sort of stalling/power loss...

Fezzik · 11-01-2010, 03:29 PM

It's not compressor surge. I'm going to try a new forged bypass valve out. I ordered it last friday so I hope it comes in this week sometime.

To Shumby: when i was looking into my g37 I looked at the price of replacements for the trannys and when I saw the AT price that is what helped me decided on the manual. I really dont think the upper gears are designed to take the high torque of the s/c. Sure these are in the fxs and all but When you are in 5th gear and hammer the gas it drops you down to 3rd or lower. If you cruise in a high gear and just give it a little more gas, you are giving it more torque without the same amount of throttle. My theory. You will probably want to get a built tranny cryo treat it and all. If my 6mt goes out I am definately going to get built tranny.

Also now would be a good time to start calling some junkyards and see if there are any there.

Brazilbro · 11-01-2010, 04:09 PM

I'm sure for half the price of the new AT you can just convert it to a 6spd.

christian370z · 11-01-2010, 04:39 PM

Quote:

Originally Posted by Buddy Revell

Have you seen the GTM vids that show what the flutter sounds like? Did the flutter on your old Saab sound similar?

It wasn't that rapid fluttering at part throttle but it was similar and it basically amounted to the fact that the car was trying to moderate boost at part throttle and the internal spring in the Bosch unit was too weak to deal with that type of pressure. I ran a Forge twin piston BOV for years and it was amazing in every way.

CGMobile370Z · 11-01-2010, 05:17 PM

Breaking new ground:

Nissan Performance Parts & Upgrades | Nissan Transmission, Torque Converter & Valve Body

517 Trans - Catalog - Infinity

Nissan Infiniti

KaienZ34 · 11-01-2010, 05:24 PM

Quote:

Originally Posted by CGMobile370Z

Breaking new ground:

Nissan Performance Parts & Upgrades | Nissan Transmission, Torque Converter & Valve Body

517 Trans - Catalog - Infinity

Nissan Infiniti

Nice find thanks

CGMobile370Z · 11-01-2010, 05:35 PM

I'm really interested in the results you get with the forged bypass valve, I have been waiting on my GTM S/C kit for quite a while and I already bought a forged bypass valve. To tell you the truth that fluttering sound will drive me insane, it makes me have second thoughts on the whole deal. This is the bypass valve I bought:

Forge Motorsport | Alloy Fabrication

11-01-2010, 12:31 PM	#136 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	Sorry to hear that Shumby ....... hope it all works out for you __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD

11-01-2010, 03:29 PM	#145 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	It's not compressor surge. I'm going to try a new forged bypass valve out. I ordered it last friday so I hope it comes in this week sometime. To Shumby: when i was looking into my g37 I looked at the price of replacements for the trannys and when I saw the AT price that is what helped me decided on the manual. I really dont think the upper gears are designed to take the high torque of the s/c. Sure these are in the fxs and all but When you are in 5th gear and hammer the gas it drops you down to 3rd or lower. If you cruise in a high gear and just give it a little more gas, you are giving it more torque without the same amount of throttle. My theory. You will probably want to get a built tranny cryo treat it and all. If my 6mt goes out I am definately going to get built tranny. Also now would be a good time to start calling some junkyards and see if there are any there. Last edited by Fezzik; 11-01-2010 at 03:39 PM.

11-01-2010, 04:09 PM	#146 (permalink)
Brazilbro A True Z Fanatic Join Date: Mar 2009 Location: Indianapolis, IN Posts: 1,131 Drives: Juke/240Z Rep Power: 848	I'm sure for half the price of the new AT you can just convert it to a 6spd. __________________ Juke AWD/240Z SR20 08 Evo 10(Stage 2) SOLD Fastest Sport 6spd 370Z 11.8 @126.5SOLD

11-01-2010, 05:17 PM	#148 (permalink)
CGMobile370Z Base Member Join Date: Sep 2009 Location: Miami, FL Posts: 144 Drives: 2009 Nissan 370Z Rep Power: 16	Breaking new ground: Nissan Performance Parts & Upgrades \| Nissan Transmission, Torque Converter & Valve Body 517 Trans - Catalog - Infinity Nissan Infiniti __________________ 370Z Touring/ Sports Package/ Stillen Gen3 Intake/ Stillen HFC/ NST Underdive Overdrive Pulleys/ FI Cat Back Exhaust/ Custom Headlights

11-01-2010, 05:35 PM	#150 (permalink)
CGMobile370Z Base Member Join Date: Sep 2009 Location: Miami, FL Posts: 144 Drives: 2009 Nissan 370Z Rep Power: 16	I'm really interested in the results you get with the forged bypass valve, I have been waiting on my GTM S/C kit for quite a while and I already bought a forged bypass valve. To tell you the truth that fluttering sound will drive me insane, it makes me have second thoughts on the whole deal. This is the bypass valve I bought: Forge Motorsport \| Alloy Fabrication __________________ 370Z Touring/ Sports Package/ Stillen Gen3 Intake/ Stillen HFC/ NST Underdive Overdrive Pulleys/ FI Cat Back Exhaust/ Custom Headlights

11-01-2010, 01:05 PM	#138 (permalink)
fstrnldr Base Member Join Date: Apr 2009 Location: CA Posts: 170 Drives: Canyonero Rep Power: 16	I've heard mixed things about level 10, I have no personal experience with them though. I would do some research in the Supra world.

11-01-2010, 01:32 PM	#139 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 16	Wow, I just made a few call's for shumby and the tranny out here cost 10,803. That's crazy expensive!

11-01-2010, 01:34 PM	#140 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	I told him about OS Giken transmission, hopefully it was released already and is less than 10k.

11-01-2010, 03:00 PM	#143 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 16	Can the fluttering be compressor surge?

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