Another ACE headers issue - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

JIM THEO · 03-28-2020, 09:19 PM

MY18 BRZ with less than 25000kms, fitted recently ACE A350 headers and Berk catted frontpipe.
I adjusted the aluminum under-tray with a hammer but after few kms of driving I realized headers rub against the subframe when I turn on the engine (engine moves slightly to the right side), when I accelerate from stop, and at high speed left corners.
I think also overpipe rubs the front sway bar, but may be is my idea as the space between those two was no more than 1cm, can't check it now due to covid19 lockdown.

My question is are the STI engine mounts and Whiteline gearbox insert enough to solve the subframe (and overpipe) rubbing problem or should I buy harder mounts or what else?

mistople · 03-28-2020, 09:27 PM

A shop told me that the STi mounts actually lower the engine slightly. Not sure if that's true or not but it could make the problem worse.

I'm also running the A350 and have the STi mounts sitting on the shelf. I had to hammer the engine cover in a few spots to stop the runners buzzing on it.

It is really unfortunate that the headers seem to have a number of design flaws despite the price point and performance advantages. I've had a bunch of issues with the 4-2 OP flange bolts coming loose and disconnecting on track. And although it seems not everyone has the issue—which already raises eyebrows in my book—the requirement to basically destroy your engine cover to make them fit seems a bit silly.

If they weren't so awesome I'd have chucked them long ago

Code Monkey · 03-28-2020, 09:40 PM

STi mounts and banging two spots on the engine tray flat = no rattling whatsoever.

weederr33 · 03-28-2020, 09:51 PM

I didn't have any issues with mine, but I also have the CS400 and the Beatrush under panel. My only issue with the whole design is the 4-2 over pipe design. It was such a pain to tighten the bolts.

Joveen · 03-28-2020, 10:04 PM

I'd anything the sti mounts should raise the engine a little more than stock.

Sent from my SM-N960U using Tapatalk

Spawn_Of_Creation · 03-28-2020, 10:41 PM

They recommend stiffer engine mounts with the ace. Sti should be the same height as the standard. It still might require banging out some of the engine tray.

JIM THEO · 03-29-2020, 05:43 AM

I'd prefer the STI mounts in every case due to OEM quality and minimal NVH increase, my questioning is if they are hard enough to minimize engine movement or the ACE need harder mounts like Perrin and Cusco.
But as most of you use STI mounts with the A350 they will be Ok!

JIM THEO · 03-29-2020, 06:38 AM

By the way are TRD and STI engine mounts the same exactly product made by Subaru, it's easier for me to find the TRD ones due to covid19 lockdown?

mrjj · 03-29-2020, 06:39 AM

I'm running ACE350 with stock engine mounts and have no rubbing. I did hammer out the skid plate though. Where exactly are you getting the rubbing on the headers?

JIM THEO · 03-29-2020, 09:13 AM

Quote:

Originally Posted by mrjj

I'm running ACE350 with stock engine mounts and have no rubbing. I did hammer out the skid plate though. Where exactly are you getting the rubbing on the headers?

Overpipe to subframe...at least, I have to check also the connection overpipe to frontpipe as the rubbing comes somewhere there, I did hammer the skid plate too!

bhmax · 03-29-2020, 10:32 AM

No issues running Ace and Sti mounts. Other than clearancing the cover.

gpvecchi · 03-29-2020, 10:40 AM

Looking forward to these headers too. Regarding hammering the skidplate, do you have just to flatten the bumps or do you have to bend it?

Quote:

Originally Posted by JIM THEO

By the way are TRD and STI engine mounts the same exactly product made by Subaru, it's easier for me to find the TRD ones due to covid19 lockdown?

They are exactly the same.

JIM THEO · 03-29-2020, 02:41 PM

Quote:

Originally Posted by gpvecchi

Looking forward to these headers too. Regarding hammering the skidplate, do you have just to flatten the bumps or do you have to bend it?

I just flatten the bumps in a way they became the opposite direction dents

SuperTom · 03-29-2020, 02:56 PM

I have just installed Perrin mounts with Ace headers. Havent driven yet as I still have car on jackstands for other projects. But I will say I didn't have to remove the headers to install on my car, just jacked up the motor from the oil pan. I did remove the bolt holding the front pipe to the trans mount. Stock ones right side came out the front, left side came out the rear. Im going to say fairly easy and can be done in your driveway

Plus 2lbs lighter off the front of the car!

03-28-2020, 09:19 PM	#1
JIM THEO Senior Member Join Date: Feb 2018 Drives: BRZ 2018 Location: Greece Posts: 498 Thanks: 119 Thanked 142 Times in 99 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Another ACE headers issue MY18 BRZ with less than 25000kms, fitted recently ACE A350 headers and Berk catted frontpipe. I adjusted the aluminum under-tray with a hammer but after few kms of driving I realized headers rub against the subframe when I turn on the engine (engine moves slightly to the right side), when I accelerate from stop, and at high speed left corners. I think also overpipe rubs the front sway bar, but may be is my idea as the space between those two was no more than 1cm, can't check it now due to covid19 lockdown. My question is are the STI engine mounts and Whiteline gearbox insert enough to solve the subframe (and overpipe) rubbing problem or should I buy harder mounts or what else?

03-28-2020, 09:51 PM	#4
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,420 Thanks: 4,579 Thanked 5,706 Times in 2,992 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	I didn't have any issues with mine, but I also have the CS400 and the Beatrush under panel. My only issue with the whole design is the 4-2 over pipe design. It was such a pain to tighten the bolts. __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

03-28-2020, 10:41 PM	#6
Spawn_Of_Creation Human Join Date: Jan 2016 Drives: 2015 BRZ Black Location: Dallas, TX Posts: 208 Thanks: 105 Thanked 102 Times in 67 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	They recommend stiffer engine mounts with the ace. Sti should be the same height as the standard. It still might require banging out some of the engine tray. __________________ "Always listen to experts. They'll tell you what can't be done, and why. Then do it." - The Notebooks of Lazarus Long

03-29-2020, 02:56 PM	#14
SuperTom Senior Member Join Date: Feb 2014 Drives: C5, GT-86, '24 Colorado TrailBoss Location: New Castle DE Posts: 1,576 Thanks: 1,682 Thanked 1,049 Times in 582 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I have just installed Perrin mounts with Ace headers. Havent driven yet as I still have car on jackstands for other projects. But I will say I didn't have to remove the headers to install on my car, just jacked up the motor from the oil pan. I did remove the bolt holding the front pipe to the trans mount. Stock ones right side came out the front, left side came out the rear. Im going to say fairly easy and can be done in your driveway Plus 2lbs lighter off the front of the car! __________________

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03-28-2020, 09:27 PM	#2
mistople Senior Member Join Date: Dec 2017 Drives: 2017 BRZ (Sold), 2023 GR86 Location: Seattle, WA Posts: 618 Thanks: 376 Thanked 433 Times in 216 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	A shop told me that the STi mounts actually lower the engine slightly. Not sure if that's true or not but it could make the problem worse. I'm also running the A350 and have the STi mounts sitting on the shelf. I had to hammer the engine cover in a few spots to stop the runners buzzing on it. It is really unfortunate that the headers seem to have a number of design flaws despite the price point and performance advantages. I've had a bunch of issues with the 4-2 OP flange bolts coming loose and disconnecting on track. And although it seems not everyone has the issue—which already raises eyebrows in my book—the requirement to basically destroy your engine cover to make them fit seems a bit silly. If they weren't so awesome I'd have chucked them long ago

03-28-2020, 09:40 PM	#3
Code Monkey Senior Member Join Date: Jul 2016 Drives: Subaru BRZ Location: Atlanta, GA Posts: 874 Thanks: 975 Thanked 596 Times in 354 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	STi mounts and banging two spots on the engine tray flat = no rattling whatsoever.

03-28-2020, 10:04 PM	#5
Joveen Senior Member Join Date: Mar 2018 Drives: Bone stock Location: Windsor, CT Posts: 776 Thanks: 535 Thanked 234 Times in 164 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I'd anything the sti mounts should raise the engine a little more than stock. Sent from my SM-N960U using Tapatalk

03-29-2020, 05:43 AM	#7
JIM THEO Senior Member Join Date: Feb 2018 Drives: BRZ 2018 Location: Greece Posts: 498 Thanks: 119 Thanked 142 Times in 99 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I'd prefer the STI mounts in every case due to OEM quality and minimal NVH increase, my questioning is if they are hard enough to minimize engine movement or the ACE need harder mounts like Perrin and Cusco. But as most of you use STI mounts with the A350 they will be Ok!

03-29-2020, 06:38 AM	#8
JIM THEO Senior Member Join Date: Feb 2018 Drives: BRZ 2018 Location: Greece Posts: 498 Thanks: 119 Thanked 142 Times in 99 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	By the way are TRD and STI engine mounts the same exactly product made by Subaru, it's easier for me to find the TRD ones due to covid19 lockdown?

03-29-2020, 06:39 AM	#9
mrjj Member Join Date: Mar 2019 Drives: GT86 2013 Location: Sweden Posts: 49 Thanks: 49 Thanked 24 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'm running ACE350 with stock engine mounts and have no rubbing. I did hammer out the skid plate though. Where exactly are you getting the rubbing on the headers?

03-29-2020, 10:32 AM	#11
bhmax Senior Member Join Date: May 2015 Drives: 13 BRZ, 17 Focus RS Location: AL Posts: 303 Thanks: 380 Thanked 98 Times in 70 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	No issues running Ace and Sti mounts. Other than clearancing the cover.

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