GTM SC installs reviewed

RCZ · 11-05-2010, 01:54 PM

in for dyno results!

DannyGT · 11-07-2010, 03:19 PM

I didn’t forget about u guys! My friend was off to some competition out of state and his mechanics were not allowed to operate the dyno without him, so I couldn’t do it on Thursday/Friday.

Its kind-of off topic, but I did a few pulls with one of my friends with a 335i that just ran 12.4 three weeks ago. I normally wouldn’t even come close to challenging him but man were we both surprised. I'll be honest, I knew my car felt faster but I'm so used to turbo power than the linearity of this charger was quite deceiving. I spun 2nd and 3rd but still powered threw those gears and by mid-4th I was pulling on him by a couple of car lengths. He's on RE11s so with better rubber I could pull even harder/quicker from him.

Either way - that felt great and made me feel even better about this whole project!

I'll try to get numbers and video this week.

CGMobile370Z · 11-07-2010, 03:33 PM

Quote:

Originally Posted by DannyGT

I didn’t forget about u guys! My friend was off to some competition out of state and his mechanics were not allowed to operate the dyno without him, so I couldn’t do it on Thursday/Friday.

Its kind-of off topic, but I did a few pulls with one of my friends with a 335i that just ran 12.4 three weeks ago. I normally wouldn’t even come close to challenging him but man were we both surprised. I'll be honest, I knew my car felt faster but I'm so used to turbo power than the linearity of this charger was quite deceiving. I spun 2nd and 3rd but still powered threw those gears and by mid-4th I was pulling on him by a couple of car lengths. He's on RE11s so with better rubber I could pull even harder/quicker from him.

Either way - that felt great and made me feel even better about this whole project!

I'll try to get numbers and video this week.

Does his 335i have software installed on it?

puckshaw · 11-07-2010, 03:40 PM

Quote:

Originally Posted by DannyGT

I didn’t forget about u guys! My friend was off to some competition out of state and his mechanics were not allowed to operate the dyno without him, so I couldn’t do it on Thursday/Friday.

Its kind-of off topic, but I did a few pulls with one of my friends with a 335i that just ran 12.4 three weeks ago. I normally wouldn’t even come close to challenging him but man were we both surprised. I'll be honest, I knew my car felt faster but I'm so used to turbo power than the linearity of this charger was quite deceiving. I spun 2nd and 3rd but still powered threw those gears and by mid-4th I was pulling on him by a couple of car lengths. He's on RE11s so with better rubber I could pull even harder/quicker from him.

Either way - that felt great and made me feel even better about this whole project!

I'll try to get numbers and video this week.

Nice! Can't wait to see the dynos

Q8y_drifter · 11-07-2010, 03:47 PM

12.4s 335i probably has a tune and bolt ons. I'm assuming no less than 350whp on the bimmer? My friend has a 335i himself. First guy I'm gonna race when the SC goes in haha.

so can we now conclude that HFC's/TP's + CBE have no effect on boost level on VHR's?

DannyGT · 11-07-2010, 03:54 PM

ya he's got, upgraded fmic, chip, intake, cbe...stock cats tho. He did 12.4@112...so I was very happy with our little test.

I would say the downpipes + cbe are good to go with the charger. I'm having no issue sticking around 8.5psi/9

Dembflyr · 11-07-2010, 03:58 PM

Danny,
Are you getting the flutter that seems really prevalent in some of the videos in the G37 vert thread?

DannyGT · 11-07-2010, 04:15 PM

I am. Good news is it doesn't seem to have any impact on performance. But regardlless, it's annoying and we are all chippinng in to nip it in the butt quickly. I think Sam will have a fix as soon as this week, so I can handle that.

CGMobile370Z · 11-07-2010, 04:30 PM

Quote:

Originally Posted by DannyGT

I am. Good news is it doesn't seem to have any impact on performance. But regardlless, it's annoying and we are all chippinng in to nip it in the butt quickly. I think Sam will have a fix as soon as this week, so I can handle that.

From what I have read in other supercharged car forums it sounds like the bypass valve isn't capable of moving enough air. The solution in the other forums to eliminate the fluttering sound was to put a larger flowing bypass valve or install two bypass valves.

Dembflyr · 11-07-2010, 04:22 PM

Cool. I was just curious if it was a few cars or if all of them were doing it.
I am beginning my penny saving for some form of forced induction so I have and will continue to follow your progress.
Thanks for the info.

Fezzik · 11-07-2010, 07:06 PM

This may not be the true solution. I've put a larger bypass valve. It may be more of the location. We will find out more when Sam works on the fix this week.

Buddy Revell · 11-07-2010, 07:13 PM

Quote:

Originally Posted by Fezzik

This may not be the true solution. I've put a larger bypass valve. It may be more of the location. We will find out more when Sam works on the fix this week.

Do you think running an open-air BOV would make it worse?

DannyGT · 11-07-2010, 07:59 PM

Quote:

Originally Posted by Buddy Revell

Do you think running an open-air BOV would make it worse?

I performed that test already. Ran it atmospherically and by the time I got back from around the block I put it back...It did get a little more pronounced (worse).

RCZ · 11-07-2010, 09:00 PM

Could it have anything to do with the fact that it recircs to one of the two intakes only?

What I dont get is why you guys think its the BPV when it makes the noise under throttle and the BPV should be closed at that point..

christian370z · 11-07-2010, 10:52 PM

It could be an issue with trying to control that part throttle boost; if the system is trying to regulate part throttle boost by rapidly opening and closing the BPV rather than holding the diaphram partially open could be an issue with how the vacuum from the intake manifold pressure drops to a vacuum and thereby operating the BPV or in unequal pressure between the intake manifold and the intake plumbing.

11-07-2010, 03:19 PM	#2 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 281	I didn’t forget about u guys! My friend was off to some competition out of state and his mechanics were not allowed to operate the dyno without him, so I couldn’t do it on Thursday/Friday. Its kind-of off topic, but I did a few pulls with one of my friends with a 335i that just ran 12.4 three weeks ago. I normally wouldn’t even come close to challenging him but man were we both surprised. I'll be honest, I knew my car felt faster but I'm so used to turbo power than the linearity of this charger was quite deceiving. I spun 2nd and 3rd but still powered threw those gears and by mid-4th I was pulling on him by a couple of car lengths. He's on RE11s so with better rubber I could pull even harder/quicker from him. Either way - that felt great and made me feel even better about this whole project! I'll try to get numbers and video this week. __________________ 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)

11-07-2010, 03:47 PM	#5 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 17	12.4s 335i probably has a tune and bolt ons. I'm assuming no less than 350whp on the bimmer? My friend has a 335i himself. First guy I'm gonna race when the SC goes in haha. so can we now conclude that HFC's/TP's + CBE have no effect on boost level on VHR's? __________________ 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 Last edited by Q8y_drifter; 11-07-2010 at 03:50 PM.

11-07-2010, 03:54 PM	#6 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 281	ya he's got, upgraded fmic, chip, intake, cbe...stock cats tho. He did 12.4@112...so I was very happy with our little test. I would say the downpipes + cbe are good to go with the charger. I'm having no issue sticking around 8.5psi/9 __________________ 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)

11-07-2010, 03:58 PM	#7 (permalink)
Dembflyr Track Member Join Date: Feb 2010 Location: Indiana Posts: 886 Drives: G37S Sedan Rep Power: 18	Danny, Are you getting the flutter that seems really prevalent in some of the videos in the G37 vert thread? __________________ 2012 G37S Sedan 6MT - Project Practicality 2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD

11-07-2010, 04:15 PM	#8 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 281	I am. Good news is it doesn't seem to have any impact on performance. But regardlless, it's annoying and we are all chippinng in to nip it in the butt quickly. I think Sam will have a fix as soon as this week, so I can handle that. __________________ 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)

11-05-2010, 01:54 PM	#1 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	in for dyno results!

11-07-2010, 04:22 PM	#10 (permalink)
Dembflyr Track Member Join Date: Feb 2010 Location: Indiana Posts: 886 Drives: G37S Sedan Rep Power: 18	Cool. I was just curious if it was a few cars or if all of them were doing it. I am beginning my penny saving for some form of forced induction so I have and will continue to follow your progress. Thanks for the info. __________________ 2012 G37S Sedan 6MT - Project Practicality 2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD

11-07-2010, 07:06 PM	#11 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 16	This may not be the true solution. I've put a larger bypass valve. It may be more of the location. We will find out more when Sam works on the fix this week.

11-07-2010, 09:00 PM	#14 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	Could it have anything to do with the fact that it recircs to one of the two intakes only? What I dont get is why you guys think its the BPV when it makes the noise under throttle and the BPV should be closed at that point.. Last edited by RCZ; 11-07-2010 at 09:02 PM.

11-07-2010, 10:52 PM	#15 (permalink)
christian370z A True Z Fanatic Join Date: Jul 2010 Location: Newport Beach Posts: 3,900 Drives: 2010 370Z/Saab 900se Rep Power: 433	It could be an issue with trying to control that part throttle boost; if the system is trying to regulate part throttle boost by rapidly opening and closing the BPV rather than holding the diaphram partially open could be an issue with how the vacuum from the intake manifold pressure drops to a vacuum and thereby operating the BPV or in unequal pressure between the intake manifold and the intake plumbing. __________________ -320whp / 259wftlbs- SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

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