JDL 4-2-1 Header Dyno results! - Page 8 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

PulsarBeeerz · 07-29-2021, 01:34 PM

Quote:

Originally Posted by Hades

Any update on this?

I've yet to see a dyno comparing Ace vs JDL 4-2-1 EL. The OP removed their dyno too.

I have a copy of the OP's dyno but I don't want to post it if he had reasons for its removal. TBH they look the same... 4-5whp difference peak but that could easily be down to wheel/tires or a catted midpipe. But, yah they look the same, same shop dyno, same tuner, near identical base lines, both on E85 (~E50), same loads, both used STD correction, both used 5th gear.

Hades · 07-29-2021, 05:37 PM

Interesting - I wonder why he removed it. Which header came out with more HP? I've heard reports of the JDL pulling harder up top, but hard to know for sure as both headers look quality. Really wish there was a more direct comparison.

J95 · 08-28-2021, 10:05 AM

I got my JDL EL 4-2-1 mounted and I tuned with OFT Stage 2+. I definitely notice gains in power around >5k rpm. Not much gains in torque dip though.

Is there any OFT tune more convenient than the stage 2+?

churchx · 08-28-2021, 10:53 AM

OFT OTS tunes are originally mostly made for their own OFT header (which is UEL). JDL EL one, especially due it being longtube header, may net limited gains with such generic tune made for different header. I have suspicions that you'd be better off paying Steve99 or wayne to fine-tune your ecu tune specific to your header, or go Ecutek and some good tuning-shop, eg. Delicious or CSG.

NicFromTheNorth · 08-29-2021, 10:51 AM

Quote:

Originally Posted by Mike_ZN6

These are my before and after dynos with the JDL 4-2-1 header on 93 octane:

This is the kind of torque curve I am trying to get with this header. I'd be willing to purchase your AVCS tables if your tuner agreed to sell them!

M0nk3y · 09-01-2021, 04:26 PM

JDL 4-2-1 Header
JDL Ultra Quiet Catted FP/OP
Perrin 2.5 Resonated Exhaust
E85 - PTuning FF Kit. E76 at time of dyno pulls
CSG Tune by Zach

CSG Mike · 09-01-2021, 05:02 PM

Quote:

Originally Posted by NicFromTheNorth

This is the kind of torque curve I am trying to get with this header. I'd be willing to purchase your AVCS tables if your tuner agreed to sell them!

You can, by purchasing the tuner's tune!

jflogerzi · 09-01-2021, 05:30 PM

Quote:

Originally Posted by NicFromTheNorth

This is the kind of torque curve I am trying to get with this header. I'd be willing to purchase your AVCS tables if your tuner agreed to sell them!

that's secret sauce!!

Miatchimus · 11-08-2021, 10:08 PM

Hi Guys, new here but have recently installed the JDL 4-2-1 headers onto my 86. I took it to a local ecutek tuner here and had a custom dyno tune as well as a flex fuel kit installed. The car feels really strong in the top end but it still feels like the mid range is lacking a bit (2.5k to 3.2k RPM feels sluggish, unsure if others have this experience on these headers/tune)

Looking through the forums here it looks like people have made pretty good gains in the mid range and eliminated the torque dip almost entirely.

Would appreciate if anyone could shed some light on this, I've attached the results from the dyno but it only shows the power, speed and air to fuel ratio so not sure if that helps but it looks like there is a big dip in the middle which I'm thinking could be the torque dip still remaining.

Thanks!

jflogerzi · 11-08-2021, 10:31 PM

Looks pretty flat to me. What does a completely stock car get on that Dyno. Best way to compare

Sent from my Pixel 5a using Tapatalk

tomm.brz · 11-09-2021, 02:21 AM

change tuner.....

alex87f · 11-09-2021, 02:56 PM

Quote:

Originally Posted by Miatchimus

Hi Guys, new here but have recently installed the JDL 4-2-1 headers onto my 86. I took it to a local ecutek tuner here and had a custom dyno tune as well as a flex fuel kit installed. The car feels really strong in the top end but it still feels like the mid range is lacking a bit (2.5k to 3.2k RPM feels sluggish, unsure if others have this experience on these headers/tune)

Looking through the forums here it looks like people have made pretty good gains in the mid range and eliminated the torque dip almost entirely.

Would appreciate if anyone could shed some light on this, I've attached the results from the dyno but it only shows the power, speed and air to fuel ratio so not sure if that helps but it looks like there is a big dip in the middle which I'm thinking could be the torque dip still remaining.

Thanks!

I'm baffled by your curves.
How can you have what's almost a power dip, without a torque dip to match?

The torque / power curves you have should be mathematically incompatible.

Am I missing something?

dragoontwo · 11-09-2021, 03:01 PM

Quote:

Originally Posted by alex87f

I'm baffled by your curves.
How can you have what's almost a power dip, without a torque dip to match?

The torque / power curves you have should be mathematically incompatible.

Am I missing something?

His curves are kW and AFR.

alex87f · 11-09-2021, 03:23 PM

Oh.

09-01-2021, 04:26 PM	#104
M0nk3y Senior Member Join Date: Oct 2016 Drives: 2016 Scion FRS / Chevy Colorado Location: Ohio Posts: 667 Thanks: 51 Thanked 573 Times in 321 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	JDL 4-2-1 Header JDL Ultra Quiet Catted FP/OP Perrin 2.5 Resonated Exhaust E85 - PTuning FF Kit. E76 at time of dyno pulls CSG Tune by Zach __________________ Kyle H. - #89 STX

11-08-2021, 10:08 PM	#107
Miatchimus Junior Member Join Date: Nov 2021 Drives: 2013 Toyota GT86 Location: Australia Posts: 2 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Hi Guys, new here but have recently installed the JDL 4-2-1 headers onto my 86. I took it to a local ecutek tuner here and had a custom dyno tune as well as a flex fuel kit installed. The car feels really strong in the top end but it still feels like the mid range is lacking a bit (2.5k to 3.2k RPM feels sluggish, unsure if others have this experience on these headers/tune) Looking through the forums here it looks like people have made pretty good gains in the mid range and eliminated the torque dip almost entirely. Would appreciate if anyone could shed some light on this, I've attached the results from the dyno but it only shows the power, speed and air to fuel ratio so not sure if that helps but it looks like there is a big dip in the middle which I'm thinking could be the torque dip still remaining. Thanks! Attached Images

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07-29-2021, 05:37 PM	#100
Hades Senior Member Join Date: Dec 2017 Drives: 2013 Scion FRS Location: Socal Posts: 214 Thanks: 521 Thanked 100 Times in 64 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Interesting - I wonder why he removed it. Which header came out with more HP? I've heard reports of the JDL pulling harder up top, but hard to know for sure as both headers look quality. Really wish there was a more direct comparison.

08-28-2021, 10:05 AM	#101
J95 Senior Member Join Date: Dec 2018 Drives: BRZ Location: ES Posts: 116 Thanks: 200 Thanked 17 Times in 15 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I got my JDL EL 4-2-1 mounted and I tuned with OFT Stage 2+. I definitely notice gains in power around >5k rpm. Not much gains in torque dip though. Is there any OFT tune more convenient than the stage 2+?

08-28-2021, 10:53 AM	#102
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	OFT OTS tunes are originally mostly made for their own OFT header (which is UEL). JDL EL one, especially due it being longtube header, may net limited gains with such generic tune made for different header. I have suspicions that you'd be better off paying Steve99 or wayne to fine-tune your ecu tune specific to your header, or go Ecutek and some good tuning-shop, eg. Delicious or CSG.

11-09-2021, 02:21 AM	#109
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11-09-2021, 03:23 PM	#112
alex87f Meow Join Date: Aug 2017 Drives: GT86 (now sold) Location: France Posts: 546 Thanks: 330 Thanked 461 Times in 244 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Oh.

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