3" exhaust questions
 

I think it's time to bite the bullet and except the fact I need a 3" system with the new charger in place

After a bit of advice from Tarmac Sportz and Mark at Abbey, we don't think my current setup below will hack it:

Borla UEL manifold
Cobra overpipe
Berk high flow cat
Invidia Q300 catback

Our main points for concern at the HFC and the Invidia catback. I've seen HFC's blown out on turbo and charged 350z's in the past so it stands to reason that this may also be an issue on my 86.

The Invidia's backbox will be fairly restrictive and we probably need to look at a more free-flowing design to get the most out of the engine now.

I know very few people on here have 3" systems, but what do you have and what has been your experience? The only systems I know of are the Perrin and the Avo. Not really a fan of the look of either which I know isn't really the point but I want something that looks and sounds good obviously, as well as having the function.

Mark informed me that a 3" overpipe is possible. Apparently Cosworth have something?

I've also seen the Full Blown kit on here, looks like a nice piece of kit and has a 3" overpipe, front pipe and catback

http://i1273.photobucket.com/albums/...ps47edacf6.jpg

http://i1273.photobucket.com/albums/...psfabe1663.jpg

I want to still keep my manifold UEL. I know this will lose me some horses but the Scooby burble is just too addictive to go to EL. Are there any UEL manifolds out there with a larger bore than the Borla I currently have?

Thanks in advance!

I have a JDL over-frontpipe and D2 exhaust. Fit is great. Quality is their usual.

Only header I know that's 3" is Nameless.

I'd be surprised if a good 2.5" system is much of a bottleneck. I'm not really sure even today why I went 3" - even pondering a swap of the whole setup to get the car quieter.

C

Thanks cjd

I've been looking at either the JDL, RevWorks or HKS UEL header. These seem to be the best of the offerings out there in terms of performance for the money

As for overpipe to catback, I've got my supplier quoting me on the Full Blown above and might be looking at a custom option being built if I get a chance to visit my fabrication guys this weekend

You don't NEED a 3" system FYI, there are people on this forum that have run into the 400WHP mark on 2.5" and didn't gain anything with 3".

I'm in a position where I might as well. My 2.5" system is damaged so I may as well go for 3" to make sure I don't have to upgrade in the future

^ This ^

Can't argue with that. Just know it's going to be louder and you're not going to get any gains out of it compared to the 2.5"

^ This ^.....

^^ That ^^

This^^^


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^ Those....? ^

But seriously, I might as well upgrade while I have the opportunity

CX kit came with 3" to the cat-back position, otherwise I would've gone 2.5. 2.5" is more than sufficient for the stock motor/trans power levels. 3" overpipe is very tight clearance and will rattle against the subframe depending on angle.

For those that don't know, I'm not stock

I'm on a built motor running the Sprintex 335 kit. Currently running her in and we're already seeing 1.2bar of boost at just 5500revs

You might find that the Borla is in fact the issue and getting a good manifold will sort it out. You want a good merge collector and the right runners and I bet that running a quality 2.5" system won't hold you back. 3" is really for those running a turbo and will be a PITA daily unless you silence it alot, in which case a freer flowing 2.5-2.75" with less silencing might be the optimal solution.

If standard manifolds aren't up to your requirement you could always get a custom one made that will be optimal for an/your SC application.

Why have you made 3 different suggestions on 3 different forums :bellyroll:

Manifold is definitely worth a look, but how am I to know which is best when I have a stock catback in place of my damaged Invidia?

Because I like to be confusing ;)

If you want me to be concise then I'll say this: Manifold is more important than a larger bore exhaust. If you want to go completely custom and need a decent exhaust then speak to H&S about a complete package, they are probably the best to give advice design on the basis that they make exhausts for all types of vehicles and have already made manifold and exhausts for the FA20.

The next option is selecting the best off the shelf components or having a mixture of the two.

I have the nameless 3 inch catback and its simply amazing. Quality and fit and finish is simply the best on the market, and it has the most refined sound for a setup like mine. Im currently all stock header and fp/op with the no muffler option and its loud, but doesnt sound nearly as annoying as the tomei exhausts i hear locally. They also make a 1 peice fp/op in 3 inch that will flow better than two peice options.

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Your catback has no comparison to a full exhaust with built engine and supercharger...... Why did you feel the need to post this?

Um because its a thread asking about 3 inch exhausts? Does that not make sense to you?

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We can do 3" with your preference of tip style etc.


https://scontent-lax3-1.cdninstagram...22717207_n.jpg

https://scontent-lax3-1.xx.fbcdn.net...80970500_o.jpg

You're probably best going to a local fabricator for a 3" overpipe/frontpipe. Clearance is very tight with RHD...I know ours won't work. :(

Just to throw this in -

I have a Perrin 3" in the back but I am AVO 2.5 up front. I have an AVO turbo and run E85/Flex getting 350WHP on 10.5 pounds of boost. We can get even more HP out of it before considering a new fuel pump or the air flow. I was glad NOT to have to go 3" up front or do the fuel pump to achieve this goal.

Just pointing this out so you can consider it with your long term goals.

Unless you're making north of 400whp you really don't need 3".

@smudge

I split the difference btwn 2.5" and 3.0" and upgraded to an Ultimate Racing 2.75" Overpipe and Frontpipe combo (resonated catless). I also run 2.5" CNT catless UEL and TRD USA Catback. The OP/FP make an additional zero WHP and 7 more WTQ on my Phantom ESC at 5 psi (roughly equivalent to 7-9pst SC/Turbo) than another Phantom ESC owner running just a stock Header, OP and a 2.5" High-flow cat Frontpipe (both dyno'd, but on different dynos and days). I'm currently at 223 WHP/207 WTQ.

The OP/FP sounds more bassy and quite a bit louder (which I like, but is not for everyone). A 3" setup would probably net the same. My recommendation would be to save your money unless you really want more sound and just a tad more power.

http://cdn.shopify.com/s/files/1/069...g?v=1416101745

Heading down to a fabrication shop this weekend. These guys made up the custom centre section on my old exhaust and really know their stuff. Hopefully a custom UEL manifold to catback won't be too expensive...

Quoted £2000 (about $3500) for a full manifold to catback...ouch

Back to square one

So, I've gone for the Ultimate Racing 3" catback and I'm in the process of deciding on the manifold, overpipe and front pipe

I think the AVO 3" front pipe and overpipe combination is a good shout for the money, but the OP will need modifying to fit the same way the OEM one would as it's designed for the turbo manifold obviously. I think the AVO 3" OP and front pipe paired with a custom manifold may be my best option here

I'm currently running the Nameless catless header and 3" header-back exhaust (overpipe included). Even with my plans to add a SC in the near future I'm swapping the exhaust for the Nameless 2.5" cat-back mainly due to noise. The 3" isn't really necessary unless you're building a racecar. NA it's super, SUPER loud... a turbo would quiet it but SC won't.

I'm used to loud so it's OK. Although I am tempted to get the AVO 3" front pipe with the 5" high flow cat just to keep it a bit tame for track days

So, the 3" catback has been ordered

Header will either be custom or a JDL UEL with a 3" collector

Overpipe and frontpipe will most likely be custom made seeing as Nameless don't want to get back to my emails, website inquiries or PM's on here...shame

I'm in the same boat as @smudge running the Sprintex 335 supercharger.
I want to get the most out of my setup so I am considering running a full 3" exhaust. I don't mind loud, but I don't want my ears to bleed...

The two setup options I am considering:

2.5" setup
JDL catless UEL (for more low end power and subie rumble)
JDL 2.5" overpipe
JDL 2.5" catted/resonated frontpipe
2.5" ARK DT-S exhaust or 2.5" JDL D2 exhaust

3" setup
JDL catless UEL (for more low end power and subie rumble)
JDL 3" overpipe
JDL 3" catted/resonated frontpipe
3" JDL D2 exhaust

I would think the JDL exhaust is much lighter than the ARK, but I can't find a lot of information of users having experience with the JDL exhaust. I found they have different tip options and are running a Magnaflow resonator. JDL's quality is top notch and it might be best to run their full setup. Just not sure if it would refine the sound better with the ARK DT-S and avoid DRONE.

:iono:

JDL exhaust has an option of JDL Tips or Standard Double Wall Tips, just not sure the difference and diameter, etc.
Looks like they might have a slash tip option which I would definitely go with if I choose their exhaust. Not sure if the JDL will DRONE.

I used rubber grommets I made from scrap and wedged in between the engine and the frame when aligning my three inch overpipe. I don't get rattles or anything at idle or down shifts. 1 tip is to leave the exhaust bracket by the transmission loose when aligning the over pipe. Have someone up front checking clearance as you raise or lower the exhaust from the transmission exhaust hanger bracket.

Fullblown Motorsports was kind enough to give me a flex pipe on my exhaust just passed the other pipe. With a tiny bit of force I was able to align everything perfectly.

Fullblown Motorsports doesn't advertise publicly but they do offer a over pipe all the way to axle back that is entirely 3 inch with v bands cheaper than nameless in the other competitors. I had 0 fitment issues...

You will not find this exhaust with over pipe and front pipe on the website you need to call them directly.

Anyone have any input on the three inch Xforce exhaust?

Seems like a bargain with a decent sound.

Decided on full 3" setup from JDL

JDL catless UEL (for more low end power and subie rumble)
JDL 3" overpipe
JDL 3" catted/resonated frontpipe
3" JDL D2 exhaust

:D

Bargain for a 3" system? Those 2 things shouldn't go together...I'd be worried about quality

Its Xforce....so their reputation is pretty established. I just don't think its popular or well known here in the states. They are a huge exhaust company in Australia.

http://www.rallysportdirect.com/shop...t-back-exhaust

Just don't know of anyone running it, and there are only a few threads here about it. Overall consensus seems extremely positive.

http://www.ft86club.com/forums/showthread.php?t=20744

More info from 2012.... lol

Nice! You should take some vids so we can hear what a full 3" JDL setup sounds like.

I'll get some videos up as soon as I can.
Full 3" JDL, Sprintex Supercharged!

:D

:burnrubber:

FT86 JDL turbo with 3" Full Exhaust D2
 

Found this nice clip of the D2

[ame="https://www.youtube.com/watch?v=uEnSkaroPqw"]FT86 JDL turbo with 3" Full Exhaust D2 - YouTube[/ame]


Another good one from John Red

[ame="https://www.youtube.com/watch?v=wbSP_Fh-cI0"]FT86 Diary #1 JDL AUTO DESIGN UEL HEADER - YouTube[/ame]

I'm booked in to have a custom UEL manifold (2" primaries to a 3" collector in a 4-1 design) with a 3" overpipe and frontpipe on 9th November. Can't wait to have it all finished so I can get the map done!

I assume you are going this route to eliminate more bottleneck

The JDL UEL is:
1.75″ Primary Runners
Low Angle Merge Collector with 2.5″ Outlet