Nissan 370Z Forum - View Single Post

NOBLE|370Z · 02-16-2014, 12:51 PM

In 2012 I installed a GTM Stg 2 TT kit with Berk HFC and Stillen CBE on my 370Z. I'm using a tune Sam made me for 93 octane fuel since we have 94 octane here in Calgary.

Due to not having precise boost control with the internal wastegates and EBC I knew I had to upgrade to external poppet type. Therefore I recently installed 3" GTM downpipes (w/ ext wastegates) with a new 3" fast intentions CBE exhaust. I don't know why the internal wastegates on the turbo(s) were ineffective. It had something to do with the tightening of the actuator but it was never 100%. I'd set my EBC to 10psi and I would only get 9psi. Therefore I would have to uncomfortably set my EBC setting to 11psi to get to the 10psi target. I didn't mess with the auto calibration parameters as I preferred to do it manually. After countless adjustments by my mechanic I just have up. So that's why I went with external WGs and downpipes.

Anyways, this week my local shop charged me 20 flipping hours just to install the new downpipes and CBE. They claimed it was a part fitment issues. GTM stated it was a lousy mechanic issue. Sam did end up sending me new gaskets which helped the exhaust leak that was happening on the top side of the pipes. Then there was another leak detected so that escapade went on for days. Let's just say the 20+ hours to do the work resulted in a job that should be perfect now. ZR auto is the shop I took it to in Calgary. I'm still not sure if I will take it back to them ever again... If you trade one shop for another then you are often times just trading an old set of problems for a new set.

Anyways, as for the FI 3" CBE I did not get the option for resonators. Upon completion of the install as I drove my car away from the shop I immediately noticed that my car's personality instantly developed a Jekyll and Hyde complex lol. As a heads up to anyone considering a similar set up: the turbos do not muffle the sound as much as one may hope they would. Every time I take it to WOT it sounds like NASA is launching a rocket to the moon. It's pretty fun and the crazy loud sound makes it a head turner from 3 blocks up the road.

On a other note, I'm not sure why but now there is feedback into the radio to the speakers. It's especially noticeable when the radio is turned off and I'm on the highway. When I accelerate the speakers really make noise. I used to install car audio and typically that sort of noise would occur if the amp power wire was laid down under the carpet next to line level and speaker wires. Has anyone experienced their ridiculously loud exhausts causing their speakers to make noise?

In summary- GTM stepped up with great customer service by over night shipping some parts and helping my mechanic troubleshoot the downpipes fitment. I love the 3" Fast Intentions exhaust. However I have a feeling I'll have to weld on some resonators to prevent my ears from popping off my head LoL

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02-16-2014, 12:51 PM	#1 (permalink)
NOBLE\|370Z Base Member Join Date: Sep 2011 Location: Calgary AB Posts: 61 Drives: 09 Nissan 370Z Rep Power: 14	GTM stage 2 TT with FI 3" CBE In 2012 I installed a GTM Stg 2 TT kit with Berk HFC and Stillen CBE on my 370Z. I'm using a tune Sam made me for 93 octane fuel since we have 94 octane here in Calgary. Due to not having precise boost control with the internal wastegates and EBC I knew I had to upgrade to external poppet type. Therefore I recently installed 3" GTM downpipes (w/ ext wastegates) with a new 3" fast intentions CBE exhaust. I don't know why the internal wastegates on the turbo(s) were ineffective. It had something to do with the tightening of the actuator but it was never 100%. I'd set my EBC to 10psi and I would only get 9psi. Therefore I would have to uncomfortably set my EBC setting to 11psi to get to the 10psi target. I didn't mess with the auto calibration parameters as I preferred to do it manually. After countless adjustments by my mechanic I just have up. So that's why I went with external WGs and downpipes. Anyways, this week my local shop charged me 20 flipping hours just to install the new downpipes and CBE. They claimed it was a part fitment issues. GTM stated it was a lousy mechanic issue. Sam did end up sending me new gaskets which helped the exhaust leak that was happening on the top side of the pipes. Then there was another leak detected so that escapade went on for days. Let's just say the 20+ hours to do the work resulted in a job that should be perfect now. ZR auto is the shop I took it to in Calgary. I'm still not sure if I will take it back to them ever again... If you trade one shop for another then you are often times just trading an old set of problems for a new set. Anyways, as for the FI 3" CBE I did not get the option for resonators. Upon completion of the install as I drove my car away from the shop I immediately noticed that my car's personality instantly developed a Jekyll and Hyde complex lol. As a heads up to anyone considering a similar set up: the turbos do not muffle the sound as much as one may hope they would. Every time I take it to WOT it sounds like NASA is launching a rocket to the moon. It's pretty fun and the crazy loud sound makes it a head turner from 3 blocks up the road. On a other note, I'm not sure why but now there is feedback into the radio to the speakers. It's especially noticeable when the radio is turned off and I'm on the highway. When I accelerate the speakers really make noise. I used to install car audio and typically that sort of noise would occur if the amp power wire was laid down under the carpet next to line level and speaker wires. Has anyone experienced their ridiculously loud exhausts causing their speakers to make noise? In summary- GTM stepped up with great customer service by over night shipping some parts and helping my mechanic troubleshoot the downpipes fitment. I love the 3" Fast Intentions exhaust. However I have a feeling I'll have to weld on some resonators to prevent my ears from popping off my head LoL Sent from my iPhone using Tapatalk