NA Manifold..

[Monkpower]

Hello people!!

 

Yes i'm a newbie and just wanted your opinion. I've got an NA Supra (95) yes, yes before you say 'put a turbo lump in it etc etc' I'm happy with my NA.

 

Just seen this manifold - ab88 Autobahn 88 Exhaust Manifold Header Toyota Supra NA JZA80 Non Turbo

 

Does anyone know how good these are or of the reputation of the website?

 

If you have any better advice regarding stainless manifolds then please help.

 

Thanks.

[Nic]

Couple of pics of the tubular manifold I use to make (not being made at the moment), it increased power by around 8-12hp and made the car feel more responsive. This like the Autobahn one replaces the stock cast manifolds and the first catalytic convertor.

 

I have no experience of the Autobahn manifold, but a lot of the ones on the market are designed to fit a left hand drive US Supra, there can be fitment problems on a RHD Supra with the manifold hitting the steering column. Also check that the bosses for the oxygen sensors are the standard 2 bolt type, as some manifolds have screw in bosses which won't fit the stock oxygen sensors.

 

Note fitting a tubular manifold will also increase the noise level of the exhaust, if you've no cats fitted, have a loud exhaust and fit a tubular manifold it will be ear bleedingly loud.

 

http://img98.imageshack.us/img98/8473/p1030161sa4.jpg http://img89.imageshack.us/img89/1831/p1030162uk1.jpg

[Nic]

This pic shows the stock cast manifolds and the first catalytic convertor next to a tubular manifold. On the pic of the cast manifold you can see the hole and 2 threaded holes either side of it where the oxygen sensor fits.

 

http://img291.imageshack.us/img291/2048/mani2jpgzp8.jpg

 

This pic shows the space between the steering column and the manifold, this is one of mine and was designed specifically for a RHD Supra. As I mentioned before there can be fitment issues with some manifolds designed for a LHD Supra hitting the steering column. You can also see the 2 bolt bosses for the oxygen sensors in this pic.

 

http://img143.imageshack.us/img143/7632/dsc00305dl3.jpg

[neo2810]

Note fitting a tubular manifold will also increase the noise level of the exhaust, if you've no cats fitted, have a loud exhaust and fit a tubular manifold it will be ear bleedingly loud.

 

But you can control the sound. My manifold, decats and exhaust were custom made by a local company and it's no louder than the stock system (possibly very slightly). I'll find out on 14th what increase I've got when I shove it on an RR.

[Nic]

But you can control the sound. My manifold, decats and exhaust were custom made by a local company and it's no louder than the stock system (possibly very slightly). I'll find out on 14th what increase I've got when I shove it on an RR.

 

Yes the key is to have an exhaust with enough silencing - the straight through manifolds and decats will all be similar in terms of noise level. Fit a cat back exhaust designed for a TT with larger diameter piping and just a single rear muffler on an NA and it will be very loud. Fit a cat back exhaust specifically designed for an NA which usually has narrower diameter piping and twin mufflers will help keep the noise down.

[nevins]

I had the autobahn manifold and had no problems apart from having to mill out the stud holes in the header face. Be warned there is a company posing as autobahn88 and ripping people right off with the manifolds that they sell, they are the wrong size, shape, lambda ports are screw in not flanged and very poor quality with missing welds. Welsh stealth can vouch for this when he wanted me to fit his for him.

[Nic]

I had the autobahn manifold and had no problems apart from having to mill out the stud holes in the header face.

 

Yes the hole alignment with the studs can be an issue.

 

The alignment of the flanges of the manifold can also be an issue ie. if the surface of the 2 flanges that bolt onto the head aren't aligned squarely, torquing down the flanges can cause stress on the welds and also if badly out, it may not be possible to get a seal between the manifold, exhaust gasket and head.

Edited November 5, 2010 by Nic (see edit history)

[DodgyRog]

Paul Whiffin is in the process of developing an N/A manifold.

 

Sure it won't be cheap, but I am guessing he will guarantee fitment, but you might have to wait a bit longer for it

[Paul Whiffin]

Paul Whiffin is in the process of developing an N/A manifold.

 

Sure it won't be cheap, but I am guessing he will guarantee fitment, but you might have to wait a bit longer for it

 

Yep sure am, the first will be done early next week, I'll update more as soon as I know.

[Spike3.0]

Watching ; )

[Monkpower]

Thanks for all of the advice peeps.

 

I'll think i'll wait for Whifbitz to sort an NA manifold...

 

On to my next query, I imagine the mnifold will get rid of the first cat..so will it still pass n MOT with one cat?

[Nic]

Thanks for all of the advice peeps.

 

I'll think i'll wait for Whifbitz to sort an NA manifold...

 

On to my next query, I imagine the mnifold will get rid of the first cat..so will it still pass n MOT with one cat?

 

Yes it should pass with no cats.

[Paul Whiffin]

It will remove the 1st cat yes, I sell a 2nd decat pipe already so at MOT time you can just put your 2nd cat back in if required.

 

Thanks for all of the advice peeps.

 

I'll think i'll wait for Whifbitz to sort an NA manifold...

 

On to my next query, I imagine the mnifold will get rid of the first cat..so will it still pass n MOT with one cat?

[David P]

I have fitted an Autobahn88 exhaust manifold onto my N/A.

The gasket face needed planing by 4mm, and all of the ports and some of the stud holes needed matching.

The planing was £20 and the port matching at no cost.

Bearing in mind the manifold only cost £60 new, now sorted out it is very good.

Pics show all in my garage and 'Evolution' album.

 

N/A's do NOT need a cat to pass MOT, details in link.

 

http://www.mkivsupra.net/vbb/showthread.php?214650-MOT-questions-and-queries-answered...

 

~~~~~~~~~~~ # Supra "Old Wives Tale" #

:tumble:=================

:tumble:============

 

 

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Edited November 6, 2010 by David P
:rlol: (see edit history)

[Monkpower]

Ahhh splendid, no cats = good times! I was considering replacing the second cat with sports/racing one. You can't beat the sound of a burbling popping exhaust on over run!!!

[Dave]

my mot guys says they need at least one cat why is there a difference between mot garages ???

[Nic]

Ahhh splendid, no cats = good times! I was considering replacing the second cat with sports/racing one. You can't beat the sound of a burbling popping exhaust on over run!!!

 

What exhaust do you have fitted?

[Monkpower]

Its a Motoria Cat back, never heard of it. Theres a good chance i'll change it to Whifbitz system.

[Elmo]

Earlier this week, I removed the stock exhaust and 2nd cat from my N/A and replaced them with a S/S 3" freeflow exhaust (off a TT) and 2nd decat, the exhaust was so loud that I couldn't bear it and today I put the cat back on, now it's much better (but still quite loud!)

[Nic]

Its a Motoria Cat back, never heard of it. Theres a good chance i'll change it to Whifbitz system.

 

If you do, I would go for a quieter one with twin mufflers.

[Monkpower]

Yeah i'm thinking - Whifbitz stainess manifold, sports cat and twin box Whifbitz cat back system.

 

It would be cool if anyone made an Stainless intake pipe with heat shielding. I've currently got an HKS super power flow filter on the stock intake.

[David P]

Make your own! 'How to', in 'my garage' and 'Evolution album'.

 

Edited November 7, 2010 by David P (see edit history)

[Elmo]

Make your own! 'How to', in 'my garage' and 'Evolution album'.

 

http://www.mkivsupra.net/vbb/attachment.php?attachmentid=122660&d=1289126360]

 

Does that setup make much of a difference?

[David P]

Yes it does.

 

When next there is a club rolling road event, will come along and do a 'before and after run', for the sceptics.

[Elmo]

and how does it sound?