Thanks for your reply, question... do you have an picture of the manifold you used?

Thanks again and all the best.

remco

I think Barbz is going for some rather fancy manifolds.
Might be worth droppiong him a pm.
Personally for the money i dont think the benefits are great.
Dont get me wrong a lot of little differences makes a big difference but theres not enough development and testing in my opinion for these to prove a worthy investment.

Does not really matter to me about the investment etc. Just would like to see something that works. But if barbz is already working on them, surely there is no need for me to go on with them. Will pm him, and thanks for your reply again.

Regards remco

Maybe I´m a bit late, but I will post something.

Here in Brazil we have some FIAT Marea 2.0 5cyl

The cars with more power(500+) here use this manifold.

http://i2.photobucket.com/albums/y39/TETEUS/INOX/ColetorInox.jpg

I don´t know the exact size. I think this one in the pic have 38mm diameter and 24" lenght.

Where can I buy it?

Quick search revealed

http://todaoferta.uol.com.br/comprar/col...T1AHFXYGUG#rmcl

Approx £700 before tax delivery etc.

Steve

It looks good but that is a THIN turbo flange, no?

I would be interested to hear from anyone who has fitted this on a coupe, whether it clears the a/c and stock pipes or any other mods required to fit.

You don't have one for internal wastegate..?

Hi all this is my first attempt at a manifold the primary tubes are exual length to within around 20mm they are 40mm i/d and a wall thickness of 1.5mm from head to turbo the length is 640mm.

http://www.flickr.com/photos/fialcia/5307804288/


[imgpop]
www.flickr.com/photos/fialcia/5307804288/[/imgpop]

I like it sofar for sure sir.

Like your car also btw .

Just some thoughts...

wall thickness might be a bit more to be safe, unless you have it welded by the best ever welder(maybe you .

Insted of the 2 time 90 degree bends after each other, use some 180 larger radius ones (if room allows it).

But for sure the layout is very nice indeed.

All the best in 2011

For all that is ofcourse;).

Remco

Hi Remco it needs alot of work i take on your comments thanks Mick.

A very good effort indeed, the only point I don't like is the angle of the pipes into the collector, hard to get it right with a five pot I know.

What method for measuring the pipe lengths are you using and how did you come to arrive at the length you did, or was it just a case of what fits ?

Not happy with the collector myself instead of 45 bends i think stright pipes would be better as for measering the pipes i have measered them all at the same points when dismanteled, i decided on the primary lenght from what guy croft said in an earlyer post.

Just buy one, do a google a few people make a 5 into 1. It'd finnish it off

If you read the earlyer post the manufactured one's are made just to fit in the space provided in a coupe i have a lot more room and i want to try somthing different.

I think you misunderstood, I meant buy a collector !

Main website

A page from the site ...

http://www.spdexhaust.com/pdfs/02-11_Merge_Collectors.pdf

sorry thanks for the link

I'm sorry but I have to disagree with a smooth converge at the collector. My method would be to use acute angles at the collector (as you have already done) in order to discourage primary pressure wave refraction thus reducing interference with adjacent cylinder firing order in an erratic way. In other words smooth flowing pipes towards the collector like the link above I consider as bad.

To be honest I am quite impressed with the current manifold you have built. Shame it can't be used for us coupé owners. Would be great if we could test it back to back with the OE manifold in an engine test cell.

Thanks for that i see what you are getting at with the collector, this one so far has cost me £120.

in italy, there are many producers that make T20 inox tubolar exhaust manifold.

one of them is mine friend, and he has tried lot of them.

in the photo, you can see the 36mm inside tbm, for Aircon equiped t20, and the 38mm tbm for non aircon t20. i think the 38 could be possible also for non aircon.






http://dl.dropbox.com/u/13719348/coup%C3%A8/exhaust/e1.jpg

http://dl.dropbox.com/u/13719348/coup%C3%A8/exhaust/e2.jpg

http://dl.dropbox.com/u/13719348/coup%C3%A8/exhaust/e3.jpg

the price is very competitive, +- 675£ (not sure at all, but very less of 1K £..)

the quality very good.
lot of miles have done testing them on Monza circuit, so in very high&fatigue condition (like 80% of track in full trottle & pressure ) stress, with a 340hp gt2860 coupè.

if someone are interested, i can tell to my friend to make a GroupBuy.

In fact, i'm not a fan of Tubolar Manifold if other stuff aren't matched, like head exhaust port, or bending tubolar itself. The std manifold are short and more adiabathic than inox Tb, that are lighter but not necessary stronger.

it's a choice. now i want to try them, but i'm sure that my lag experience will be ruined by some hundred Rpms (with gt28rs 086), but final topend (now 344hp with 2,75" full exhaust and std manifold/injector @ 58psig) (hope) and EGT will be better.

stay tuned

to me the manifold is not the problem... the turbo is the problem with its design... a donut .....exhaust gas enter's the housing spins round and round the gas compresess in the exhaust housing till it reaches the center were it exits the turbo so more back pressure ... the engine is trying to push gas into a centrafruge with a exit in the middle so more back pressure.. why not re-design a turbo so its like a spiral.... it would be a lot smaller ... but it would spin faster

the turbo is a crap design ... to move high speed comressed gas through a 90 degree angle... its pants ... get a supercharger...a turbo charger needs re-desigening
big picture
i should paintent this...lol
more to think about

It's a serious restriction, certainly not free power.

it is a spiral, the flow goes into a reducing diameter cone, like a snail around the turbine??

as said,to see it watch this,at 30 seconds it shows the path of exhaust gasses really well.turbos are way more efficient than superchargers
http://www.youtube.com/watch?v=BXzQfKZczuw&feature=related
enjoy,especially if you speak german!

So where do we seriously go if we want a performance manifold that isn't just shiney, but does all of the above then?????

So where do we seriously go if we want a performance manifold that isn't just shiney, but does all of the above then?????

There is on TIG-ART.com called superstock turbo manifold.
Trust me, it is the proper biz, by the look of it. equal lentgh.
The set back though is the price:Brace yourself, more than 1000Euro.
For what i heard, the flow is perfect
I just dont want to guess what noise it will make
Shake it out

Unless you can make it yourself you need to find a perfectionist to do it for you. Brace yourself for the cost, just the materials and aftermarket collector touchs a grand. You will have to accept that the turbo will be moved away from its oe place and a knock on effect will be seen throughout the engine bay. Either that or just stick with the cast one.