Which EL Header Correct Torque Dip Best?

[Yoshoobaroo]

The best header to correct the torque dip IMO is the stock one + E85

[86MLR]

The torque dip never bothered me stock or modified.

I'm more interested in performance from around 4.5k rpm up.

As for the oem header, my 17 flattened and lifted it nicely after a hammer and screwdriver was taken to all the "restrictions".

People focus way to much on "race car mods" for daily driven street cars.

Is it becausenamebrand?

My mate swapped out his 2015 headers with a punched out cat for brand name, he spent $1500ish on the headers, he only made minimal gains in mid and top end after being tuned.

If you are supercharged and pushing 300hp you may see some gains, but from my experience and research, if you are staying NA, a 17+ OEM header sans cat will be suffice.

Disclaimer: I don't race for sheep stations on the street or track.

[Wil]

Hi, thanks for the inputs.
I tried the stock header with the cat removed (at least the wall inside the cat) and all shielding removed. The noise was ricey as hell and the smell terrible.
The car though, was more responsive and more willing to go which was a big plus but it didn't correct the dip entirely.
I don't have access to E85 here in Belgium unfortunately.

I do believe exhaust scavenging and piping design has a big effect on the torque curve and think cats only affect higher rpm (5k+). Logically, the higher RPM, the more restriction you'll feel.

Can the JDL EL catted header (long tube design) correct the dip? Any independant dyno with this header?

[bfrank1972]

P&L, I think theres a used one with cat and ceramic coating in the classifieds here. Various posts showing dyno charts for it here, but my unscientific un-dynoed opinion, I love them. Has a torque hump where the dip used to be, then flat to about 6500 where it picks up again for the last 1000 rpm. Feels great, and sound really nice, big difference.

Me revving, might try to get some road clips at some point.

Not too sure that guy would ship to Belgium though.

Sent from my SM-G965U using Tapatalk

[Wil]

Originally Posted by bfrank1972

P&L, I think theres a used one with cat and ceramic coating in the classifieds here. Various posts showing dyno charts for it here, but my unscientific un-dynoed opinion, I love them. Has a torque hump where the dip used to be, then flat to about 6500 where it picks up again for the last 1000 rpm. Feels great, and sound really nice, big difference.

Me revving, might try to get some road clips at some point.

Not too sure that guy would ship to Belgium though.

Sent from my SM-G965U using Tapatalk

Hi, that sounds nice indeed! What's the complete exhaust setup?
Mine will be stock headerback but with a custom stock axle back with an vacuum actuated exhaust valve.

Do you have any link to the classified you mentioned? Could not find it with the search tool...

[DarkSunrise]

Originally Posted by Wil

Kind of necroing this but, I am still looking for a catted EL header that really does correct the torque dip. Budget is 1k$.
I was looking at the FT86 Speed Factory which appears to be barely UEL and sounds kind of EL on top. JDL and P&L as well but could not find some relevant and independant testing. It will be tuned with OFT.
I'm using the car as a daily driver and will track it from time to time on tracks with long phase of acceleration (Spa to be precise)

I had the FT86SF catted header + OFT and liked it quite a bit. The torque dip was gone with that combo. Previous to that, I had a JDL catless header and the torque dip was still slightly noticeable. Top-end is a different story though.

OFT has a tune specific for the FT86SF catted header, so make sure to use that if you go this route.

[the new guy]

Custom Ecutek tune + Header if you really want the torque dip gone. My car pulls hard to redline with the JDL EL header and HRI Ecutek tune. He does remote tuning so it's an option for you. Delicious Tuning is another.

[Dr. BRZ]

If youre going to street race and etc get EL. If you just want sound get uel.

[bfrank1972]

Originally Posted by Wil

Hi, that sounds nice indeed! What's the complete exhaust setup?
Mine will be stock headerback but with a custom stock axle back with an vacuum actuated exhaust valve.

Do you have any link to the classified you mentioned? Could not find it with the search tool...

Hey sure:

http://www.ft86club.com/forums/showthread.php?t=133018

My setup is just the catted P&L header and a Greddy SP Elite exhaust. I'm really happy with it. Tone is great from the Greddy stuff too - I think someone on the forum has a Greddy setup as well - I think that's the full setup with front/midpipe whereas my front/mid/overpipes are still stock (just muffler).

I've been meaning to do some vids of it going down the road so maybe I'll put one together soon. To me this is one of the biggest things with this car - it will never be really fast unless you dump a bunch of $$$ into a big FI setup. What I wanted is some mods that liven up the car, make it feel a bit more racy and sound much better.

[adalah]

Following!this seems like a very interesting thread

[Lantanafrs2]

Lol

[Wil]

Originally Posted by bfrank1972

Hey sure:

http://www.ft86club.com/forums/showthread.php?t=133018

My setup is just the catted P&L header and a Greddy SP Elite exhaust. I'm really happy with it. Tone is great from the Greddy stuff too - I think someone on the forum has a Greddy setup as well - I think that's the full setup with front/midpipe whereas my front/mid/overpipes are still stock (just muffler).

I've been meaning to do some vids of it going down the road so maybe I'll put one together soon. To me this is one of the biggest things with this car - it will never be really fast unless you dump a bunch of $$$ into a big FI setup. What I wanted is some mods that liven up the car, make it feel a bit more racy and sound much better.

If you tell me the torque dip is gone with this header, this is what I'll be getting along with a custom tune from Shiv.
But a long tube as well as equal length header doesn't sound like it, haha!

[bfrank1972]

Originally Posted by Wil

If you tell me the torque dip is gone with this header, this is what I'll be getting along with a custom tune from Shiv.
But a long tube as well as equal length header doesn't sound like it, haha!

Hey I respect a healthy degree of skepticism

Full transparency, after I installed the headers I may have noticed a very slight reduction in throttle response below 2k, but not sure if that's related to the header itself or the OFT off the shelf tune I'm running.

Either way, 3-4.5k used to be my least favorite part of the power band, now it's my most favorite. Goes to show you can just lump a header into 'good' or 'bad' because it's UEL, EL, 4-2-1, 4-1, long tube, short tube, etc. A lot more design considerations go into it, runner lengths, diameter, collector design, etc.

BTW here's a video clip I did from today's morning commute. Pretty damned boring, but gives you an idea of interior sound levels with this catted header + Greddy muffler. It's quiet, but decent sound when you get on it - I'll try to get outside clips at some point, that's where it sounds really nice. Also may try to log and get some virtual dyno plots to show the shape of the torque curve now.

[Wil]

Originally Posted by bfrank1972

Hey I respect a healthy degree of skepticism

Full transparency, after I installed the headers I may have noticed a very slight reduction in throttle response below 2k, but not sure if that's related to the header itself or the OFT off the shelf tune I'm running.

Either way, 3-4.5k used to be my least favorite part of the power band, now it's my most favorite. Goes to show you can just lump a header into 'good' or 'bad' because it's UEL, EL, 4-2-1, 4-1, long tube, short tube, etc. A lot more design considerations go into it, runner lengths, diameter, collector design, etc.

BTW here's a video clip I did from today's morning commute. Pretty damned boring, but gives you an idea of interior sound levels with this catted header + Greddy muffler. It's quiet, but decent sound when you get on it - I'll try to get outside clips at some point, that's where it sounds really nice. Also may try to log and get some virtual dyno plots to show the shape of the torque curve now.

Those dynos plots would be great! They'd give me an idea on what I can expect from this header! If you manage to find the time to make some, I'd be very grateful.