RCZ's 370Z Journal.

puckshaw · 03-07-2010, 09:07 PM

This was the "comfort" version, right? Can't imagine what the race version would be like

Hopefully Z1 can get this dialed in.

370zForever · 03-07-2010, 09:24 PM

Dang, sad to hear about the NVH problems. I was really going through for that mount... I just hope that RCZ won't have any more problems and I'll keep my hopes up....

m4a1mustang · 03-07-2010, 09:28 PM

Thanks for the review, Raul. I kind of figured there were going to be some significant NVH issues once I knew you wanted to talk to Z1 before you posted.

370zForever · 03-07-2010, 09:36 PM

Hey guys,

I've looked through some reviews of other people with the 370z version of the mount and the common factor is that it was a great installation and there was a small price in comfort. Others claim that after a FEW hundred miles, there were no issues. I'm hoping this NVH issue will go away soon, I'm sure we all are...

By the way, getting my bridgestone RE-11s in two days...Can't wait to swap out the OEMs for those....

NYBladeZ · 03-07-2010, 09:34 PM

I don't mind the noise as much as I would hate the increase in the vibration

m4a1mustang · 03-07-2010, 09:37 PM

Quote:

Originally Posted by NYBladeZ

I don't mind the noise as much as I would hate the increase in the vibration

If you've ever been in a car with a really noisy transmission I think you'd change your mind (for a daily driver, anyways). The noise gets very annoying and the vibration just takes it over the top.

travisjb · 03-07-2010, 09:54 PM

sounds like the right part for me!

you know who to look up if you take it off... thx for the great review

RCZ · 03-07-2010, 11:13 PM

You guys are all welcome. I wish install hadn't been as much as it was, apparently there was a rule I didnt know about where they charge me one hour minimum even though it was 10 minutes of work. Some of the quirks of testing stuff out, it doesn't always go perfectly. Its all good though, its all part of the job

1slow370 · 03-08-2010, 04:46 AM

yup thats why its better to do these things yourself. great to hear the mount helped.

semtex · 03-08-2010, 07:48 AM

Thx for the great review! +rep

Z1Performance · 03-08-2010, 08:24 AM

Thanks Raul for taking the time out to try this out. I pm'd you but I'll post it here too since everyone should hear/see it. When I did the 75A (stiffer than yours) mount in my own car (350Z), I literally thought we had forgotten to reconnect my exhaust! I've got a build motor, Crawford headers, test pipes and a titanium exhaust. Everything inside the car resonated and was much louder. The rear glass had a noticeable resonance at the 2500-4000 rpm point. You even felt it in the steering wheel. This was done on a Saturday afternoon. I spoke to the engineer on it and he assured me to just keep driving it and it would settle in, so I did. It made a world of difference. By the following Wednesday, I had done around 350 miles in the car, a mix of highway and alot of backroad (so lots of shifting, accel/decel) and it had settled in perfectly. It was still a deeper sound in the cabin but none of the resonance was there.

If you've got some time to do some more miles, give it a go and let me know. I'll also talk internally and see what we can do about a lower durometer as well.

Thanks again!

puckshaw · 03-08-2010, 08:41 AM

Quote:

Originally Posted by Z1Performance

Thanks Raul for taking the time out to try this out. I pm'd you but I'll post it here too since everyone should hear/see it. When I did the 75A (stiffer than yours) mount in my own car (350Z), I literally thought we had forgotten to reconnect my exhaust! I've got a build motor, Crawford headers, test pipes and a titanium exhaust. Everything inside the car resonated and was much louder. The rear glass had a noticeable resonance at the 2500-4000 rpm point. You even felt it in the steering wheel. This was done on a Saturday afternoon. I spoke to the engineer on it and he assured me to just keep driving it and it would settle in, so I did. It made a world of difference. By the following Wednesday, I had done around 350 miles in the car, a mix of highway and alot of backroad (so lots of shifting, accel/decel) and it had settled in perfectly. It was still a deeper sound in the cabin but none of the resonance was there.

If you've got some time to do some more miles, give it a go and let me know. I'll also talk internally and see what we can do about a lower durometer as well.

Thanks again!

Interesting. So let's assume RCZ racks up a few hundred miles quickly and confirms this. How long before these go into production and are available for purchase?

m4a1mustang · 03-08-2010, 08:42 AM

Quote:

Originally Posted by Z1Performance

If you've got some time to do some more miles, give it a go and let me know. I'll also talk internally and see what we can do about a lower durometer as well.

Thanks again!

I'm hoping that things settle in as I'd love to firm up the shifting action.

theDreamer · 03-08-2010, 08:55 AM

Quote:

Originally Posted by m4a1mustang

I'm hoping that things settle in as I'd love to firm up the shifting action.

Hopefully it will, and I am sure RCZ will report back after a week of driving.
Thanks for doing this RCZ, hopefully now with one on a car we can dial everything in to get perfection for this part.

rednek01 · 03-08-2010, 09:11 AM

I mentioned this a while back when this was first talked about. I think you will find a lot of your problems are from using two different bushing materials. your motor mounts (most likely softer bushing) are fighting your trans mount bushing which is now much firmer.

You have to look as the motor and trans as one piece since they are solidly bolted together. And since this is the case you cannot use two different bushing materials because they will fight each other, which might be why the Z1 mount is 'loosening up" when in fact it is wearing out prematurely from fighting the vibrations that the motor mounts are allowing.

I learned all this the hard way with suspension bushings and it took me 3-4 bushing sets to realize you have to change out all the bushings that are affected to the same material other wise they are just going to fight each other.

So I feel that until you get some motor mount bushings that are of the same stiffness you will continue to have this problem.

03-07-2010, 09:28 PM	#3 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6964	Thanks for the review, Raul. I kind of figured there were going to be some significant NVH issues once I knew you wanted to talk to Z1 before you posted. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

03-07-2010, 09:34 PM	#5 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 22	I don't mind the noise as much as I would hate the increase in the vibration __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

03-07-2010, 09:54 PM	#7 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 190	sounds like the right part for me! you know who to look up if you take it off... thx for the great review __________________ 2009 370Z #104 For Sale

03-07-2010, 11:13 PM	#8 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	You guys are all welcome. I wish install hadn't been as much as it was, apparently there was a rule I didnt know about where they charge me one hour minimum even though it was 10 minutes of work. Some of the quirks of testing stuff out, it doesn't always go perfectly. Its all good though, its all part of the job Last edited by RCZ; 03-07-2010 at 11:27 PM.

03-08-2010, 04:46 AM	#9 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7252	yup thats why its better to do these things yourself. great to hear the mount helped. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

03-07-2010, 09:07 PM	#1 (permalink)
puckshaw Track Member Join Date: Nov 2009 Location: Charlotte, NC Posts: 620 Drives: 09 PW 370Z Touring Rep Power: 18	This was the "comfort" version, right? Can't imagine what the race version would be like Hopefully Z1 can get this dialed in.

03-07-2010, 09:24 PM	#2 (permalink)
370zForever Base Member Join Date: Jul 2009 Location: California Posts: 159 Drives: 09 Black 370z Rep Power: 17	Dang, sad to hear about the NVH problems. I was really going through for that mount... I just hope that RCZ won't have any more problems and I'll keep my hopes up....

03-07-2010, 09:36 PM	#4 (permalink)
370zForever Base Member Join Date: Jul 2009 Location: California Posts: 159 Drives: 09 Black 370z Rep Power: 17	Hey guys, I've looked through some reviews of other people with the 370z version of the mount and the common factor is that it was a great installation and there was a small price in comfort. Others claim that after a FEW hundred miles, there were no issues. I'm hoping this NVH issue will go away soon, I'm sure we all are... By the way, getting my bridgestone RE-11s in two days...Can't wait to swap out the OEMs for those....

03-08-2010, 07:48 AM	#10 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	Thx for the great review! +rep __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

03-08-2010, 08:24 AM	#11 (permalink)
Z1Performance Base Member Join Date: Aug 2009 Location: St. James, NY Posts: 237 Drives: 350Z Rep Power: 17	Thanks Raul for taking the time out to try this out. I pm'd you but I'll post it here too since everyone should hear/see it. When I did the 75A (stiffer than yours) mount in my own car (350Z), I literally thought we had forgotten to reconnect my exhaust! I've got a build motor, Crawford headers, test pipes and a titanium exhaust. Everything inside the car resonated and was much louder. The rear glass had a noticeable resonance at the 2500-4000 rpm point. You even felt it in the steering wheel. This was done on a Saturday afternoon. I spoke to the engineer on it and he assured me to just keep driving it and it would settle in, so I did. It made a world of difference. By the following Wednesday, I had done around 350 miles in the car, a mix of highway and alot of backroad (so lots of shifting, accel/decel) and it had settled in perfectly. It was still a deeper sound in the cabin but none of the resonance was there. If you've got some time to do some more miles, give it a go and let me know. I'll also talk internally and see what we can do about a lower durometer as well. Thanks again!

03-08-2010, 09:11 AM	#15 (permalink)
rednek01 Enthusiast Member Join Date: Feb 2009 Location: Houston Posts: 352 Drives: Mustang GT Rep Power: 239	I mentioned this a while back when this was first talked about. I think you will find a lot of your problems are from using two different bushing materials. your motor mounts (most likely softer bushing) are fighting your trans mount bushing which is now much firmer. You have to look as the motor and trans as one piece since they are solidly bolted together. And since this is the case you cannot use two different bushing materials because they will fight each other, which might be why the Z1 mount is 'loosening up" when in fact it is wearing out prematurely from fighting the vibrations that the motor mounts are allowing. I learned all this the hard way with suspension bushings and it took me 3-4 bushing sets to realize you have to change out all the bushings that are affected to the same material other wise they are just going to fight each other. So I feel that until you get some motor mount bushings that are of the same stiffness you will continue to have this problem. __________________ Project オレンジ 2009 (FUGLY) Grabber Orange Mustang GT // SLP loudmouth axle back // JLT intake // BamaChips Tunes // ... TheDreamer's personal mechanic

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