JDL 4-2-1 EL header - Page 26 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

steverife · 07-12-2021, 09:37 AM

Good luck getting the STi mounts. And if you find 2 sets, let me know!

I haven't noticed the issue with the subframe and I'm on stock mounts launch the car hard for autocross. My concern when I put the header onto the car is that there is only maybe 2 or 3 mm between the tubes and the radiator support. I was worried about melting my fans, but it hasn't proved to be an issue so far.

jflogerzi · 07-12-2021, 09:42 AM

Quote:

Originally Posted by steverife

Good luck getting the STi mounts. And if you find 2 sets, let me know!

I haven't noticed the issue with the subframe and I'm on stock mounts launch the car hard for autocross. My concern when I put the header onto the car is that there is only maybe 2 or 3 mm between the tubes and the radiator support. I was worried about melting my fans, but it hasn't proved to be an issue so far.

Mine has not been a problem even with a thicker JRDC radiator. Hot track days, DD and autocross

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Qwimby1 · 07-12-2021, 11:01 AM

WiSh I'd known about this before I ordered a Borla which is enroute now.

jflogerzi · 07-13-2021, 03:38 PM

If you can return I would. If there desgin is still the same it's pretty damn old. Much better UEL designs than borla

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Mike_ZN6 · 07-13-2021, 04:59 PM

Quote:

Originally Posted by Qwimby1

WiSh I'd known about this before I ordered a Borla which is enroute now.

Quote:

Originally Posted by jflogerzi

If you can return I would. If there desgin is still the same it's pretty damn old. Much better UEL designs than borla

2nd that on sending it back!

Mike_ZN6 · 07-21-2021, 06:19 PM

Quote:

Originally Posted by steverife

Good luck getting the STi mounts. And if you find 2 sets, let me know!

I haven't noticed the issue with the subframe and I'm on stock mounts launch the car hard for autocross. My concern when I put the header onto the car is that there is only maybe 2 or 3 mm between the tubes and the radiator support. I was worried about melting my fans, but it hasn't proved to be an issue so far.

I ordered STi motor and transmission mounts from RHDJapan on July 12th and they showed up today. So that makes it 9 days total shipped via DHL from Japan. RHDJapan had the best price, too.

jflogerzi · 07-21-2021, 06:39 PM

Quote:

Originally Posted by Mike_ZN6

I ordered STi motor and transmission mounts from RHDJapan on July 12th and they showed up today. So that makes it 9 days total shipped via DHL from Japan. RHDJapan had the best price, too.

Can you send me the link to them?

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Mike_ZN6 · 07-21-2021, 06:53 PM

Quote:

Originally Posted by jflogerzi

Can you send me the link to them?

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Here you go:

https://www.rhdjapan.com/sti-reinfor...right-zc6.html

https://www.rhdjapan.com/sti-reinfor...-left-zc6.html

https://www.rhdjapan.com/sti-reinfor...mount-zc6.html

Goingnowherefast · 07-22-2021, 12:32 PM

My JDL 4-2-1 Headers showed up today. I have the gaskets and everything needed. Gameplan is to do the following (unfortunately I think I have to wait until next year to get back to back dyno'd):

1. On the same day, when temps have stabilized, run 2x back to back vdyno's in multiple directions w/ Tomei UEL Header + Delicious Tomei UEL Tune and save the data log
2. Using AIM solo/Vbox Sport run some acceleration runs w/ Tomei UEL Header
3. Swap to JDL 4-2-1 EL Header and load Delicious 4-2-1 EL Tune
4. Run 2x back to back vdyno's in multiple directions w/ JDL 4-2-1 EL Header and save data log
5. Using AIM solo/Vbox Sport run some acceleration runs w/ JDL 4-2-1 EL Header

So hopefully this will get us an indication of potential power gains/losses, an insight into the data as far as datalogs go, and some real world acceleration to back up any numbers. The tests will be done on the same day, within a few hours of each other on the same tank of gas. Also for those judging the consistency of vdyno's, I just want to say when they are done right they can be ultra consistent and accurate. Like most things, the output is only as good as your input and most people do it wrong imho. Here's an example of two runs, in the opposite direction. Clearly, they can be repeatable when done right.

Mike_ZN6 · 07-22-2021, 03:22 PM

Quote:

Originally Posted by Goingnowherefast

My JDL 4-2-1 Headers showed up today. I have the gaskets and everything needed. Gameplan is to do the following (unfortunately I think I have to wait until next year to get back to back dyno'd):

1. On the same day, when temps have stabilized, run 2x back to back vdyno's in multiple directions w/ Tomei UEL Header + Delicious Tomei UEL Tune and save the data log
2. Using AIM solo/Vbox Sport run some acceleration runs w/ Tomei UEL Header
3. Swap to JDL 4-2-1 EL Header and load Delicious 4-2-1 EL Tune
4. Run 2x back to back vdyno's in multiple directions w/ JDL 4-2-1 EL Header and save data log
5. Using AIM solo/Vbox Sport run some acceleration runs w/ JDL 4-2-1 EL Header

So hopefully this will get us an indication of potential power gains/losses, an insight into the data as far as datalogs go, and some real world acceleration to back up any numbers. The tests will be done on the same day, within a few hours of each other on the same tank of gas. Also for those judging the consistency of vdyno's, I just want to say when they are done right they can be ultra consistent and accurate. Like most things, the output is only as good as your input and most people do it wrong imho. Here's an example of two runs, in the opposite direction. Clearly, they can be repeatable when done right.

@justinco did a direct comparison with the Revworks UEL and the ACE 350 a while back: https://www.ft86club.com/forums/showthread.php?t=125559

I'm interested to see the real world acceleration difference between the Tomei UEL and the JDL 4-2-1.

jflogerzi · 07-27-2021, 01:04 AM

I week away from Dyno tune day with Zach at CSG

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Thefalls · 07-27-2021, 03:38 AM

Quote:

Originally Posted by Mike_ZN6

Here you go:

https://www.rhdjapan.com/sti-reinfor...right-zc6.html

https://www.rhdjapan.com/sti-reinfor...-left-zc6.html

https://www.rhdjapan.com/sti-reinfor...mount-zc6.html

You fitted them already?

It a very good upgrade.

After fitting the trans mount ( the other two were fitted earlier on ) I noticed a slight vibration in the steering wheel at stock idle.

But overall very satisfied, the car is a daily anyways

.

Mike_ZN6 · 07-27-2021, 09:59 AM

Quote:

Originally Posted by Thefalls

You fitted them already?

It a very good upgrade.

After fitting the trans mount ( the other two were fitted earlier on ) I noticed a slight vibration in the steering wheel at stock idle.

But overall very satisfied, the car is a daily anyways

.

Not yet, hopefully within the next 2 weeks I should be able to get them on.

I already have the Whiteline KDT926 transmission mount insert installed and I did not notice much increase in NVH. The STi unit will be replacing the stock mount and the Whiteline insert. My car is a daily as well, I am hoping the vibration from the STi transmission mount is not too bad.

Did you notice any increase in NVH from just the STi engine mounts?

gpvecchi · 07-27-2021, 03:42 PM

Just added noise from the gearbox mount, no vibrations.

07-22-2021, 12:32 PM	#359
Goingnowherefast Senior Member Join Date: May 2019 Drives: AP2 S2000, 91 Miata 1.8L Rotrex 5MT Location: Detroit, MI Posts: 465 Thanks: 275 Thanked 299 Times in 187 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	My JDL 4-2-1 Headers showed up today. I have the gaskets and everything needed. Gameplan is to do the following (unfortunately I think I have to wait until next year to get back to back dyno'd): 1. On the same day, when temps have stabilized, run 2x back to back vdyno's in multiple directions w/ Tomei UEL Header + Delicious Tomei UEL Tune and save the data log 2. Using AIM solo/Vbox Sport run some acceleration runs w/ Tomei UEL Header 3. Swap to JDL 4-2-1 EL Header and load Delicious 4-2-1 EL Tune 4. Run 2x back to back vdyno's in multiple directions w/ JDL 4-2-1 EL Header and save data log 5. Using AIM solo/Vbox Sport run some acceleration runs w/ JDL 4-2-1 EL Header So hopefully this will get us an indication of potential power gains/losses, an insight into the data as far as datalogs go, and some real world acceleration to back up any numbers. The tests will be done on the same day, within a few hours of each other on the same tank of gas. Also for those judging the consistency of vdyno's, I just want to say when they are done right they can be ultra consistent and accurate. Like most things, the output is only as good as your input and most people do it wrong imho. Here's an example of two runs, in the opposite direction. Clearly, they can be repeatable when done right. __________________ 2022 Hyundai Elantra N 6MT SCCA TT S3//Will be back in an 86 eventually

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07-12-2021, 09:37 AM	#351
steverife Senior Member Join Date: Feb 2018 Drives: 2016 Scion FRS Location: Knoxville, TN Posts: 458 Thanks: 53 Thanked 275 Times in 181 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Good luck getting the STi mounts. And if you find 2 sets, let me know! I haven't noticed the issue with the subframe and I'm on stock mounts launch the car hard for autocross. My concern when I put the header onto the car is that there is only maybe 2 or 3 mm between the tubes and the radiator support. I was worried about melting my fans, but it hasn't proved to be an issue so far.

07-12-2021, 11:01 AM	#353
Qwimby1 Senior Member Join Date: Nov 2015 Drives: 14 FRS Monogram, 05 Mazdasped Miata Location: Sarasota, FL Posts: 568 Thanks: 132 Thanked 140 Times in 104 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	WiSh I'd known about this before I ordered a Borla which is enroute now.

07-27-2021, 03:42 PM	#364
gpvecchi Senior Member Join Date: Mar 2018 Drives: Toyota 86 GT Limited PP (Model G) Location: Italy Posts: 1,018 Thanks: 406 Thanked 335 Times in 187 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	Just added noise from the gearbox mount, no vibrations.

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