JDL Catted Header
 

http://jdlautodesign.net/shop/ft86-c...length-header/

I don't know if this is really being offered by JDL. I can't find any info on the forums. Anyone have any information it?
How does it compare to the ft86 speedfactory header.

Well the obvious is the SpeedFactory header is UEL while this one is EL.

If it's on their website, it's most likely being offered. Just contact them if you're curious.

oh i thought it was uel my bad.
thanks

If you look on the same site, their catted UEL is clearly on their website too:

http://jdlautodesign.net/shop/ft86-c...length-header/

so wait a minute do they offer catted uels too?
I thought it was only ft86 speedfactory that offered it

Nah man. they put it on their site for fun. (Joke)


Yes. Of course they sell one too. That's why it's on their site.

They have a whole thread about their exhaust systems: HERE.

Does anyone have dyno numbers for the JDL UEL Catted headers? Can't seem to find anything online about it.

Yeah I mean i know it's on the site, but I don't see any info on the forums. Kinda want to know a little bit more.

OP you need to read that JDL thread way more detailed than just post a new one

I have the JDL Catted UEL Header on my car. Compared to the FT86 SpeedFactory Header, JDL has the better quality. In terms of fitting the header and installing it, I heard that the FT86 SpeedFactory Header is a bit more difficult compared to the JDL. Also JDL's UEL header has longer pipes, which in a sense would give more rumble. Performance wise, I'd have to go with JDL. I heard that they've really studied and researched on making their header produce the best results.

Thanks, I was looking at the forums and I really couldn't find any information on it. I really am interested in JDL now, and I'm debating if I want to go catted or non catted. I was wondering if the catted was a bit loud for your taste.

I've been interested in the JDL catted UEL as well, but I've never had an aftermarket header before, and I have a bit of a loud exhaust, so the increase in volume, etc was a concern to me.

I emailed JDL a few weeks ago, and here is some of that Jesse had to say with regards to answering my questions; maybe it will help answer some of your questions as well -

"As far as sound goes, we designed the catted UEL with the same short bank to long bank runner length ratio as the uncatted UEL so the exhaust note is very similar. The catted version is a little quieter as the cat tones it down a bit and reduces a bit of rasp.

In terms of power the uncatted version will make a few more peak hp, i would say about 5 at absolute most. The headers perform very similar throughout the low end and midrange. To be honest its very hard if not impossible to really feel a difference between the 2 in a car.

Both headers will be louder than stock, The piping used is thinner higher grade material that resonates a difference sound."

Let me find a dyno from the initial prototype... I took a car with drop in filter and 3" cat back, dyno tuned it... Swapped on the header and retuned for a fair comparison. Interesting characteristics. Torque dip was still present iirc but made almost the same tq increase at every rpm. The entire plot just shifted up. They decided to not produce it for whatever reason but I was fairly impressed overall. I was told that they would sell if someone asked for it but they weren't going to post it up anywhere. It looks like they changed their mind. :)

Catback + stock rom
Catback + dyno tuning
Catback + JDL catted UEL + dyno tuning

Note manual transmission cars avg 130-135whp on this dyno. Autos around 125. This car made ~128.2 with the catback iirc. Gains are fairly decent imo.

https://www.dropbox.com/s/9ohocuiqll...%20am.png?dl=1

this was probably one of my favorite sounding exhaust setups to date.

Yeah, JDL is the better option to go with in my opinion. I went with the catted because I don't plan to get a tune anytime soon as well as have to worry about the CEL. The catted uel header didn't make my car too loud. It depends on what exhaust you have. I know I have a deeper sounding exhaust which combined with the JDL increases the sound a bit more as well as ad the rumble, but to me it doesn't feel like a significant increase of sound. I find it to be the perfect sound in my case, it's not too loud, and not too quiet. For the uncatted, it would sound relatively louder and perhaps a bit more raspier. Overall, I find my header to be a good match along with the rest of my exhaust system.

Yeah im surprised that they offered it. I thought it was only FT86 Speedfactory that offered it. I'm still debating if I should get catted or uncatted, but as someone stated you can hardly tell the difference. I'll most likely go catted to get a more tamed exhaust note.

Personally I would rather use a catted front pipe. My girlfriend has a greddy sp muffler, JDL catted fp, op, and catless UEL and the exhaust noise level is fairly low, with no drone, and has a great sound to it.

which exhaust do you have?

The key to keeping the rasp and drone down will be whats after the header. IMO I would go JDL's uel non catted, ultra quiet FP (or keep stock front pipe) and get a nice resonated cat-back like a Q300, 2.5inch perrin or something similar.

I have the Afe Takeda catback exhaust. I was pressured into buying it so I don't know how the whole thing would sound with everything stock in the front and the catback exhaust.

I just finished this exact setup. JDL UEL catless, 2.5" OP, UQFP, and 2.5" resonated perrin. It sounds like sex. Can totally recommend.

I have the Greddy Supreme SP Catback on.

I installed the JDL catted UEL with a factory exhaust and I didn't notice a difference in the exhaust note. No rumble at all. Swapping out the muffler for the muffled track pipe from Nameless makes it sound like a typical tuner Subaru though. I dynoed it, un-tuned, and lost a significant amount of mid-range torque. After getting tuned some of the mid range torque was returned and a decent amount was gained at the top of the rev range. It weighs about 6 pounds less than the factory header so I guess I'll stick with it. For now.

thanks for your input guys, I'm still debating cause of Cali laws. I want that rumble but not be too loud.

It would be nice if one of these catted headers was available with a stock looking heat shield, such that it could pass visual inspection.

Did you warm up the car and then re-torque the header? The heads flex slightly and the flanges will loose contact with the head. A friend did a dyno with one of the very first JDL UEL uncatted headers and lost significant power until high rpm. After fixing the flanges not matting up he broke 200whp wayyyyy back.

What gaskets did your friend use? I did re-torque the header bolts after a while, but none of the nuts felt loose when I did. I noticed some soot on the head when I removed the factory header but when I re-torqued the bolts I didn't notice any more than what was already there.

I have installed a lot of headers and used STI and BRZ gaskets. You want to warm the engine and torque when warm. The nuts won't come loose. Especially if you are using the copper lock nuts. But the torque value may change due to the engine having slight flex after warming up.

I am going to assume the design for the catted UEL hasn't changed much if any from the original prototype and I forsure saw a fairly large gain across the powerband. Did you have it dyno tuned or just e tuned or what? I would be more than happy to share the vvt maps used in the dyno above when I get to my computer.

@nelsmar I would be happy to try your VVT maps for my JDL UEL header.

Mind you this was for the Catted header
https://www.dropbox.com/s/e2ohommoru...%20AM.png?dl=1

Oh I'm uncatted so I need to read more carefully. Thanks for sharing though.

Uncatted 200+WHP (Mustang dyno with proper SAE correction) mods were:
JDL UEL
JDL OP
JDL Catted FP
Stock catback
TRD intake
HKS duct (I don't recall think i made vvt changes for the duct install, I would have to double check. If I did they were very minor):
https://www.dropbox.com/s/s4mulnig3v...%20AM.png?dl=1

200whp NA without E85 on a mustang dyno? I'm not calling bullshit, but i'm skeptical.

https://www.dropbox.com/s/69lkunsyql...1-4th.pdf?dl=0

4th gear (5th gear is 1:1) Hell i want to say the dyno might have been under calibrated RPM wise which would mean the HP would be slightly higher as I was using wheel speed for RPM pickup. I want to say it peaked at 201WHP for a few pulls and before smoothing the plot but i decided to pull it back just a hair since it was going to be driven fairly hard. The weather station had just been verified for calibration, I unfortunately don't have the weather report spec's around for exact climate & correction factor. Above was one of the early E85 pulls vs the finalized 91 octane. This car has been a track whore and driven on very aggressive tunes for most of its life... Still holding down the same power it did 50k miles ago.

Here is the finalized E85 with a 5th gear roll...
https://www.dropbox.com/s/pvn8bfgii9...-E220.jpg?dl=1

I have done this with multiple cars... and remote tuned a few friends cars (which is obviously not going to be as dialed in as a dyno tuned car) and had them land 190-195+ with similar mods.

If you aren't familiar with me on the forums (I have been away for a while now) go back and look through some of my threads. I post no-bullshit dyno's. I want to say I am somewhere around ~1600 flashes on the ecu on my own personal car... So I have had my fair share of time messing around with this platform lol.

Hate to be that guy (not really). But anymore updates/ dynos? I plan on going with the carted just because I won't be getting a tune right away.

you sure of this? "and lost a significant amount of mid-range torque"