Perrin Engine Mount concerns (UPDATED) - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

StraightOuttaCanadaEh · 11-19-2019, 03:46 PM

Got the latest updated Perrin engine mounts and the engine sounds like it wants to jump out of the engine bay. There are a lot of thuds and vibrations at idle, very ugly sounding. Took it back to the mechanic to find out if one of them is loose and nope, he says he triple checked everything.

I did notice when the engine is warmed up the effect is less pronounced and right now it's routinely below freezing here in Toronto. It just so happened that my first drive with the mounts was when the car was warmed up and I remember thinking wow, this is not bad at all.

So for those who have had this mount or any mounts installed, is it normal to have this much racket going on at idle? Do certain mods make it worse? I have the Perrin/Whiteline trans support and bushing combo, and Whiteline diff outrigger and subframe bushings.

Is there a bit of a break in period? Do cold weather/rougher idle when engine is cold make this effect less pronounced?

Is there any weight to the hearsay that Fluidamrp pulley mitigates the NVH?

Thanks!

UPDATE: okay after a long drive, I can confidently say the crazy knocking sound is caused by the rough cold idle. Once the engine is hot, there are no crazy noises, even at idle. The only problem so far is a nasty gurgling rasp that is noticeable on acceleration, especially from 3K rpm onwards, but that may be due to the trans support, as it seems to come from directly below the trans tunnel. I put my back seats up and that helped the noise and I have to say, noises aside, the effect is very nice.

Joveen · 11-19-2019, 03:49 PM

Subd. I wanted to buy these mounts and still plan on doing so. I think mounts do take a lil bit to break in.

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norcalpb · 11-19-2019, 04:13 PM

I mean you’re daily driving with Perrin mounts in freezing weather.

They probably harden up in the cold and will shake the hell out of the engine.

JD001 · 11-19-2019, 04:18 PM

I have the STI Group N mounts (engine and transmission), temperature has touched 3c so far, no issues. I'm loving them.

Joveen · 11-19-2019, 04:21 PM

Quote:

Originally Posted by JD001

I have the STI Group N mounts (engine and transmission), temperature has touched 3c so far, no issues. I'm loving them.

Any links to those? I cant find them anywhere

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DarkPira7e · 11-19-2019, 04:43 PM

I didn't realize your location. Being so cold, I think it makes more sense, especially since your chassis will also creak and vibrate more until it's warmed up. I know when I drive my car and it's -15F out, nothing sounds good.

Joveen · 11-19-2019, 04:44 PM

Quote:

Originally Posted by JD001

https://www.ft86speedfactory.com/sti...l#.XdRhnGSnw0M

I those were regular sti mounts.

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JD001 · 11-19-2019, 04:47 PM

Quote:

Originally Posted by Joveen

I those were regular sti mounts.

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Sorry wrong link..

https://sprintingharejdm.co.uk/ST410...20ST41022AS010

https://sprintingharejdm.co.uk/ST41020AS000

gpvecchi · 11-19-2019, 04:48 PM

Quote:

Originally Posted by JD001

I have the STI Group N mounts (engine and transmission), temperature has touched 3c so far, no issues. I'm loving them.

Yes, absolutely perfect. Just a clicking noise from the gearbox support on open/close throttle.

JD001 · 11-19-2019, 04:50 PM

Quote:

Originally Posted by gpvecchi

Yes, absolutely perfect. Just a clicking noise from the gearbox support on open/close throttle.

I don't even get any clicking sounds..

DarkPira7e · 11-19-2019, 04:51 PM

@Joveen They're on almost every site that sells parts for our cars, they're just called STI mounts. I don't think there's any difference between " Group N" and "regular" STI mounts for our platform as far as I have seen.

https://www.ft86speedfactory.com/sti...l#.XdRjcldKh1M

https://www.ft86speedfactory.com/sti...l#.XdRjXFdKh1M

Joveen · 11-19-2019, 04:57 PM

I just confused when it said Sti vs Group N mounts. That's why thought these engine mounts were just sti and not group n.

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i8ur911 · 11-19-2019, 05:01 PM

Quote:

Originally Posted by DarkPira7e

@Joveen They're on almost every site that sells parts for our cars, they're just called STI mounts. I don't think there's any difference between " Group N" and "regular" STI mounts for our platform as far as I have seen.

https://www.ft86speedfactory.com/sti...l#.XdRjcldKh1M

https://www.ft86speedfactory.com/sti...l#.XdRjXFdKh1M

STI and Group N are different durometers. They are different, but I think even the STI mounts are considered an "upgrade" over the standard mounts in the 86 chassis.

DarkPira7e · 11-19-2019, 05:03 PM

Quote:

Originally Posted by i8ur911

STI and Group N are different durometers. They are different, but I think even the STI mounts are considered an "upgrade" over the standard mounts in the 86 chassis.

Where are you finding a different durometer rating for the STI Group N mounts on our platform? I know on other Subaru chassis this is true, but for ours there seems to be no difference. I'm not being argumentative, I'm just hoping you're right.

11-19-2019, 03:46 PM	#1
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,794 Thanks: 1,165 Thanked 1,674 Times in 994 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	Perrin Engine Mount concerns (UPDATED) Got the latest updated Perrin engine mounts and the engine sounds like it wants to jump out of the engine bay. There are a lot of thuds and vibrations at idle, very ugly sounding. Took it back to the mechanic to find out if one of them is loose and nope, he says he triple checked everything. I did notice when the engine is warmed up the effect is less pronounced and right now it's routinely below freezing here in Toronto. It just so happened that my first drive with the mounts was when the car was warmed up and I remember thinking wow, this is not bad at all. So for those who have had this mount or any mounts installed, is it normal to have this much racket going on at idle? Do certain mods make it worse? I have the Perrin/Whiteline trans support and bushing combo, and Whiteline diff outrigger and subframe bushings. Is there a bit of a break in period? Do cold weather/rougher idle when engine is cold make this effect less pronounced? Is there any weight to the hearsay that Fluidamrp pulley mitigates the NVH? Thanks! UPDATE: okay after a long drive, I can confidently say the crazy knocking sound is caused by the rough cold idle. Once the engine is hot, there are no crazy noises, even at idle. The only problem so far is a nasty gurgling rasp that is noticeable on acceleration, especially from 3K rpm onwards, but that may be due to the trans support, as it seems to come from directly below the trans tunnel. I put my back seats up and that helped the noise and I have to say, noises aside, the effect is very nice. __________________ Instagram: @gt86ws Last edited by StraightOuttaCanadaEh; 11-19-2019 at 07:49 PM.

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11-19-2019, 03:49 PM	#2
Joveen Senior Member Join Date: Mar 2018 Drives: Bone stock Location: Windsor, CT Posts: 767 Thanks: 535 Thanked 232 Times in 162 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Subd. I wanted to buy these mounts and still plan on doing so. I think mounts do take a lil bit to break in. Sent from my SM-N960U using Tapatalk

11-19-2019, 04:13 PM	#3
norcalpb Senior Member Join Date: Oct 2013 Drives: 2013 BRZ, 2023 Model 3 Location: SF Bay Area Posts: 2,296 Thanks: 1,212 Thanked 861 Times in 570 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I mean you’re daily driving with Perrin mounts in freezing weather. They probably harden up in the cold and will shake the hell out of the engine.

11-19-2019, 04:18 PM	#4
JD001 Senior Member Join Date: Apr 2015 Drives: Subaru BRZ Location: UK Posts: 6,028 Thanks: 7,652 Thanked 6,187 Times in 3,474 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	I have the STI Group N mounts (engine and transmission), temperature has touched 3c so far, no issues. I'm loving them.

11-19-2019, 04:43 PM	#6
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,933 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	I didn't realize your location. Being so cold, I think it makes more sense, especially since your chassis will also creak and vibrate more until it's warmed up. I know when I drive my car and it's -15F out, nothing sounds good.

11-19-2019, 04:51 PM	#11
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,933 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	@Joveen They're on almost every site that sells parts for our cars, they're just called STI mounts. I don't think there's any difference between " Group N" and "regular" STI mounts for our platform as far as I have seen. https://www.ft86speedfactory.com/sti...l#.XdRjcldKh1M https://www.ft86speedfactory.com/sti...l#.XdRjXFdKh1M

11-19-2019, 04:57 PM	#12
Joveen Senior Member Join Date: Mar 2018 Drives: Bone stock Location: Windsor, CT Posts: 767 Thanks: 535 Thanked 232 Times in 162 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I just confused when it said Sti vs Group N mounts. That's why thought these engine mounts were just sti and not group n. Sent from my SM-N960U using Tapatalk

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