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-   MazdaSpeed 3 - Engine, Transmission & Driveline (http://www.mazdaspeedforums.org/forum/f10/)
-   -   JBR engine mounts and vibrations / noise (http://www.mazdaspeedforums.org/forum/f10/jbr-engine-mounts-vibrations-noise-200748/)

Tokay444 04-11-2016 08:22 PM

More jbr tranny mounts have failed than stock mounts.

aackthpt 04-11-2016 10:18 PM

Quote:

Originally Posted by thrisnospork (Post 3043748)
With the CP-E stage 2 the idle vibes are what put me off. the DM is quite a bit better at idle and allows me to feel the clutch better taking off from first, the CP-E was vibe city until the clutch grabbed and I had a hard time feeling the catch point.

I think your CPE wasn't broken in or was loose with those idle vibes; mine is completely benign at idle and takeoff. However I think I will give you that clutch feel may have been a touch better on DM. That would have to be due to lower engine movement allowed though, because the hydraulic clutch shouldn't actually behave any differently unlike the shifter.

Quote:

Originally Posted by DUffSpeed3 (Post 3043749)
I just drive too much to deal with a lot of excess noise/vibration, and don't chime in any BS unless you drive over 40 miles a day on the freeway with traffic... Up hill both ways.

Haha, fucking whiner. I drive about 40 city miles a day, equally split mileage wise between freeway and surface, and with the traffic it seems like uphill both ways. I'm so allergic to traffic I manipulate my leaving times and watch Google Now so I can drive when things aren't too backed up. I'm lucky to have that flexibility. But there are lots of people around here that put us to shame on driving miles, for example btstarcher, pretty sure that dude drives a LOT.

Say Chi Sin Lo 04-11-2016 11:15 PM

Quote:

Originally Posted by aackthpt (Post 3043778)
I think your CPE wasn't broken in or was loose with those idle vibes; mine is completely benign at idle and takeoff. However I think I will give you that clutch feel may have been a touch better on DM. That would have to be due to lower engine movement allowed though, because the hydraulic clutch shouldn't actually behave any differently unlike the shifter.


Haha, fucking whiner. I drive about 40 city miles a day, equally split mileage wise between freeway and surface, and with the traffic it seems like uphill both ways. I'm so allergic to traffic I manipulate my leaving times and watch Google Now so I can drive when things aren't too backed up. I'm lucky to have that flexibility. But there are lots of people around here that put us to shame on driving miles, for example btstarcher, pretty sure that dude drives a LOT.

Yeah, I'm running the CP-E 60 duro RMM, I've got to be close to 60,000miles now. You've got to break the mount in. The first 1,000miles or so, I was in full regret mode because I thought I've ruined the livability of the car. But man, once the mount settles down the vibrations and noises really level off.

Now, how long do these bushings last?

aackthpt 04-12-2016 10:43 AM

Quote:

Originally Posted by Say Chi Sin Lo (Post 3043784)
Now, how long do these bushings last?

Probably not as long on v1 as on v2. I'd suggest to have a look at a v1 at least every 2yrs/30k. It's unfortunate that it's not as easy to inspect as a v2.

Say Chi Sin Lo 04-12-2016 10:46 AM

Quote:

Originally Posted by aackthpt (Post 3043911)
Probably not as long on v1 as on v2. I'd suggest to have a look at a v1 at least every 2yrs/30k. It's unfortunate that it's not as easy to inspect as a v2.

I can visually inspect the thing without taking it off right? (I don't remember, it's been a long time since I got underneath the car)

aackthpt 04-12-2016 12:32 PM

Quote:

Originally Posted by Say Chi Sin Lo (Post 3043912)
I can visually inspect the thing without taking it off right? (I don't remember, it's been a long time since I got underneath the car)

If you have a V1 (which I believe you do if you have a 60duro - the v2 doesn't come in multiple durometers) then you will pretty much have to remove it to inspect the bushing because the bushing is in the stock location which is sandwiched between two pieces of structural stamped steel.

Say Chi Sin Lo 04-12-2016 12:44 PM

Quote:

Originally Posted by aackthpt (Post 3043971)
If you have a V1 (which I believe you do if you have a 60duro - the v2 doesn't come in multiple durometers) then you will pretty much have to remove it to inspect the bushing because the bushing is in the stock location which is sandwiched between two pieces of structural stamped steel.

Alright, then f*** it. The mount is either fine as it is or a new one is going in.

MSMS3 04-12-2016 08:13 PM

OP, if you have not done so already, raise your idle rpm +200 and see if that stops or reduces some of the shaking at red lights and in stop and go traffic.

DUffSpeed3 04-12-2016 08:51 PM

You need an access port to change the idle. That's not quite in the budget right now.

DUffSpeed3 05-02-2016 03:14 PM

~1000 Mile update. They are a lot better, but the vibration around 70-80 MPH are still an issue. Rear view mirror is a blur and you never know when CHP might cruse up behind you. Also when coming to a stop as RPM's drop to around 2750 it does s sudden major vibration through the dash. The noise through the transmission is a lot better, however, they need to go. The performance is awesome, but not for a daily driver.


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