GTM supercharger install on G37 Vert

SAM@GTM · 10-30-2010, 10:14 PM

Quote:

Originally Posted by Fezzik

Just an update. Sam has been in constant contact with me. I've had a cold start issue and a heat soak issue. NOt a big deal, i just have to give it a little gas to start. Sam is also working on the solution to the fluttering and will send out a fix when he has it. I"m going to try to do a few more runs for sam to gather data if efuseakay is free

David is it a hot or a cold start issue that you are having ? I understood it was when the car is cold witch We had never ran into a cold start issue before, might not be a bad idea to verify the fuel pump install and even checking base fuel press, The map i sent you was based on 18 Celsius coolant temp starting problem.

Let me know.

Sam

efuseakay · 10-31-2010, 11:26 AM

Sorry I couldn't come out last night. Hope you still had a chance to log more data!

Fezzik · 11-01-2010, 03:33 PM

No prob Jeff. I have done a few runs. I have been monitoring boost. the vaccum stays at -20 until i get on it and boost goes up to a pinch under 9 psi. So far the car is running well. I'm having to learn to drive the car all over again with this much torque and power. I've seen the VDC go off as much in the last week as I have in my whole life of owning cars with VDC.

My power steering is groaning ever so slightly. I think I have a small kink in the return line from the power steering pump to the resevoir. I'm going to put a new hose on ther eand see if that helps. My theory is that if fluid cant be pushed out enough then that can cause the groan.

Fezzik · 11-04-2010, 07:58 PM

Well. I put in the forged bypass valve with 3 different springs. Still fluttering. I tried extending the hose, That helped a little but not solved.

CGMobile370Z · 11-04-2010, 08:01 PM

Quote:

Originally Posted by Fezzik

Well. I put in the forged bypass valve with 3 different springs. Still fluttering. I tried extending the hose, That helped a little but not solved.

Damn, I was hoping the Forged bypass valve would solve the problem.

wishihadnav · 11-04-2010, 08:07 PM

damn sorry to hear...hopefully Sam comes up with a fix as his car has absolutely no flutter whatsoever..

Buddy Revell · 11-04-2010, 08:38 PM

Quote:

Originally Posted by Fezzik

Well. I put in the forged bypass valve with 3 different springs. Still fluttering. I tried extending the hose, That helped a little but not solved.

Damn, sorry to hear that. Thanks for the info, though.

Fezzik · 11-04-2010, 09:41 PM

Yeah. Sam is working on the fix after sema this week

Thought I'd try and see if it work

Fezzik · 11-05-2010, 12:54 AM

Q8y_drifter · 11-05-2010, 06:55 AM

Is that what slightly helped?

Fezzik · 11-05-2010, 08:43 AM

yes it is. It helped a little, but its still there.

Q8y_drifter · 11-05-2010, 08:57 AM

Are you building any boost when the fluttering occurs? Maybe a softer spring than what comes with the Forge DV might help.

weiboy718 · 11-05-2010, 10:15 AM

Did you noticed any changes on the low end after installing the new bypass valve? Like your idling being more jumpy and does it backfires?

DannyGT · 11-05-2010, 10:26 AM

The fluttering is happening between -5vac to 0...it happens in decel, shifts, and when your on the throttle about 5-15%. I originally thought it was more but its not. Any more than that and its gone once boost starts to build.

Most likely its a positioning thing. The fact that he reduced it a bit by adding the longer tube kind-of tells me a dual setup or one up by the TBs would do the trick.

Whats important here is that drivability, power delivery, and the overall tune is as OEM feeling as you can get!

weiboy718 · 11-05-2010, 10:55 AM

Quote:

Originally Posted by DannyGT

The fluttering is happening between -5vac to 0...it happens in decel, shifts, and when your on the throttle about 5-15%. I originally thought it was more but its not. Any more than that and its gone once boost starts to build.

Most likely its a positioning thing. The fact that he reduced it a bit by adding the longer tube kind-of tells me a dual setup or one up by the TBs would do the trick.

Whats important here is that drivability, power delivery, and the overall tune is as OEM feeling as you can get!

Can the bpv spring might be too soft if it's bypassing during acceleration. possibly?

11-05-2010, 06:55 AM	#85 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Is that what slightly helped? __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

11-05-2010, 08:57 AM	#87 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Are you building any boost when the fluttering occurs? Maybe a softer spring than what comes with the Forge DV might help. __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

11-05-2010, 10:26 AM	#89 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 279	The fluttering is happening between -5vac to 0...it happens in decel, shifts, and when your on the throttle about 5-15%. I originally thought it was more but its not. Any more than that and its gone once boost starts to build. Most likely its a positioning thing. The fact that he reduced it a bit by adding the longer tube kind-of tells me a dual setup or one up by the TBs would do the trick. Whats important here is that drivability, power delivery, and the overall tune is as OEM feeling as you can get! __________________ 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)

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10-31-2010, 11:26 AM	#77 (permalink)
efuseakay Enthusiast Member Join Date: Mar 2010 Location: The DAYNGA ZONE! Posts: 404 Drives: 2010 G37xS Sedan Rep Power: 15	Sorry I couldn't come out last night. Hope you still had a chance to log more data!

11-01-2010, 03:33 PM	#78 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	No prob Jeff. I have done a few runs. I have been monitoring boost. the vaccum stays at -20 until i get on it and boost goes up to a pinch under 9 psi. So far the car is running well. I'm having to learn to drive the car all over again with this much torque and power. I've seen the VDC go off as much in the last week as I have in my whole life of owning cars with VDC. My power steering is groaning ever so slightly. I think I have a small kink in the return line from the power steering pump to the resevoir. I'm going to put a new hose on ther eand see if that helps. My theory is that if fluid cant be pushed out enough then that can cause the groan.

11-04-2010, 07:58 PM	#79 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	Well. I put in the forged bypass valve with 3 different springs. Still fluttering. I tried extending the hose, That helped a little but not solved.

11-04-2010, 08:07 PM	#81 (permalink)
wishihadnav A True Z Fanatic Join Date: Nov 2009 Location: 90090 Posts: 1,851 Drives: Force Fed Nismo Rep Power: 184	damn sorry to hear...hopefully Sam comes up with a fix as his car has absolutely no flutter whatsoever..

11-04-2010, 09:41 PM	#83 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	Yeah. Sam is working on the fix after sema this week Thought I'd try and see if it work

11-05-2010, 12:54 AM	#84 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15

11-05-2010, 08:43 AM	#86 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	yes it is. It helped a little, but its still there.

11-05-2010, 10:15 AM	#88 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 16	Did you noticed any changes on the low end after installing the new bypass valve? Like your idling being more jumpy and does it backfires?