bTwix

I've got procats with a custom magnaflow catback and have the ATLP j-pipe on the way. I'm going to get the ATLP catback when it comes out. With the ATLP J-pipe and catback will I lose power if I keep the procats? Should I replace the procats with my OEM cats or TL-S cats when I do the ATLP j-pipe and catback? I don't want to lose low end torque and remember hearing something about losing too much backpressure with both the procats and j-pipe?

evanj5

Nobody really knows yet until some dynos are done.

anx1300c

iTrader: (2)

^^ Excellent advice; anything else is speculation at this point.

princelybug

iTrader: (16)

Also, the ATLP catback is currently available for purchase as well.

stillhere153

iTrader: (1)

I think he was reffering to the base atlp catback with the ls tips

as anx pointed out... the rumors going around are from a jpipe design e-shift tested with their procats... apparently they claim to have lost some ponies by replacing the stock jpipe with a more free flowing one... but who knows since I've yet to see pre and post dyno sheets

bTwix

Exactly. Maybe I'll just go back to OEM cats with ATLP j-pipe and catback to keep things simple. Procats seem to be having quality issues too so maybe better to just get them out of there.

Kennedy

iTrader: (2)

I did that... went to Type-S cats, ATLP J-pipe and ATL quads...

twigglius

iTrader: (6)

How much were the type-s cats?

stillhere153

iTrader: (1)

$400 from me

twigglius

iTrader: (6)

wonder what they cost new?

FiveLiterCheater

Around 500 +/- a few

eh? spec

Do you feel a difference in the car with that? I'm hoping to have a similar set-up eventually.

04accordcpe

iTrader: (3)

true on that, no dyno sheets were ever posted, so we just went by what e-shit told us. you have to think to yourself though, why would they lie? they already made a jpipe that was ready for production and could have sold a ton of them, if there were actual gains to be had.

on the other hand, im sceptical myself, now that i see what kind of business they run along with their non-existant customer support i wouldnt put anything past them

bTwix

How did the dyno look? I'm leaning towards the same setup. You NA?

JCL622

wait what am i reading correctly? adding the jshit jpipe lost ponies? or is it too early in the morning

stillhere153

iTrader: (1)

yea I think you are way off on your reading... the op's question was reffering to the following

procats + jpipe + catback = loss of backpressure (according to e-shift)

I on the other hand DONT BELIEVE THE HYPE

Black_05_TL_6SP

What quality issues are you refering to? The only issue I have seen was from being used with forced induction and FI/Methal injection. Other then that, I have not heard of any issues with it being on a N/A car.

BTW, I have had mine for 30K miles now.

stillhere153

iTrader: (1)

actually some n/a guys have reported them crapping out aswell

bTwix

https://acurazine.com/forums/showthread.php?t=171962

I think there were 1 or 2 NA cases where people observed deterioration in the procats. Then there's the ULEV vs. LEV debate and the fact the e-shift isn't returning calls. Since I'm going to be putting in a new j-pipe and catback I want to make sure the cats are handled at the same time. Wont know if my procats are hosed until it all comes apart.

Way I look at it, if you can't do both procats and j-pipe on NA without losing tq then the j-pipe wins since gains are similar, it's less expensive and it doesn't wear out. If the procats look hosed when I do the j-pipe I'm putting the OEM cats back in there. Might do it just for peace of mind regardless.

stillhere153

iTrader: (1)

it may well be 1 or 2 cases on acurazine... but not the case on the forum which I can't write since it will be deleted for some weird reason ... alot of procats have been deteriorating N/A and F/I... they just have been...

now this is what I propose for you what to do with this

bTwix

Well those certainly won't deteriorate but I might even lose more tq with this 0 cell cat on NA. Then there's the luxury of pulling up in front of the club with car that smells like a broken lawnmower. I'm all about perf gains but this mod is a bit over the top for me. Dumping all that pollution for a couple hp/tq (maybe on SC) just doesn't seem worth it to me.

Kennedy

iTrader: (2)

Thank you for saying that...

It's nothing short of irresponsible to run these on a daily driven car. The damage done to the environment for the few meager "unused" HP is nothing short of stupid. 273 WHP in a TL-S isn't enough eh?...

Replacing the 3rd cat is one thing, removing all them is another.

Go take a look at what it's like to live in China these days (from an environmental perspective), and please rethink this mod.

Frankly, this mod pisses me off. For an individual to be so selfish to pollute like this, for again, the exceptionally limited gains... The catalytic converter is such a wonderful and effecient invention. Even if it gained 30 HP... Gimme a break, you're not actually in a race car.

Bring on the hippee, tree hugger rebuttals... I'm fully prepared to rebut them.

I will be letting the moderators know my opinion of the sale of such a mod on this forum as well... For whatever that's worth.

bTwix

Yeah, it's pretty messed up over there ...

http://www.youtube.com/watch?v=8lY_nw6PmxU

http://www.youtube.com/watch?v=-1DNjJd2YfA

stillhere153

iTrader: (1)

these are offroad kennedy... I am going to buy them and install them on track days... not gonna be driving around with them...

mike's planning hiflow cats... that will be my route

JCL622

hmm now that i'm more awake and reading this post, when i was doing my setup, originally i was thinking about going from J-shift downpipe + megan test pipe and then straightpipe all the way to the y/bends to the exhaust,

the installer also noted that I would probably lose some HP due to lack of back pressure, which is way he kept the resonator on. dunno if that makes sense or not, but thought i' throw in my 2cents

Black_05_TL_6SP

Post some pictures of the cats when you remove them. I would like to see.