Wanted - AAZ exhaust manifold

[Jetmugg]

Wanted - AAZ exhaust manifold.  Turbo preferred, but may be able to use a N/A  manifold.

Let me know what you have.

Steve M.

[rallydiesel]

What kind of flange are you looking for?

[blackbird82]

I have one. with the integral turbo. the little guy. Instant boost! great in a city!

[Jetmugg]

I'm intending to use this for a land-speed racing application (1.5L diesel truck category).  Throttle response is not important.  Good flow is much more critical.

Steve.

[theman53]

Steve, the 1.6 manifold will work and fit as they are the same.

[8v-of-fury]

Turbo or naturally aspirated?

[Jetmugg]

Maybe I should modify, start over or re-phrase my request.  Some additional context might be helpful.  This is for a 1.5L / AAZ headed turbodiesel setup.  I already have a 1.6L non-turbo exhaust manifold sitting on the shelf, but to my eye, it looks like it wouldn't flow especially well.

Talking to my local turbo shop about this project, he recommended finding the best flowing exhaust manifold that would work with this head.  The turbo flange is not critical, but if a good flowing turbo manifold is available, that might help simplify matters (it also might not).  If I can come up with a good flowing exhaust manifold or shorty style tubular header, I can adapt the turbo flange from there.

The engine is going in a Dodge Rampage, and will be used for a Land Speed Racing attempt.  I am free to modify the firewall for turbo and exhaust clearance.  The turbo does not have to reside in a "stock" location like on a factory TD setup for a Golf/Jetta/etc. I will most likely have to weld a steel "box" onto the firewall, which will extend into the passenger's compartment to allow for additional space for the turbo and exhaust system.

I hope this explanation helps.  I think that perhaps I should start a new discussion on the regular technical board.

Steve

[8v-of-fury]

Yes I am aware

What I then would recommend is using the stock 1.6NA manifold.. as you will find from measuring the inner that mates to the exhaust system it should be like 2.5"! Most people only run 2.5" on a heavy turbo build.. So I think you will be fine to move all the air you need through that proper vw manifold.

Even take a look at the runners, they are a nice manifold. It was the downsize to 1" exhaust pipe that got them the bad rap. ))

[Jetmugg]

Thanks for the knowledge Jeremy.     I'll do a double check of the N/A manifold.  You may have just saved me a couple of hundred bucks.

Steve.

[scrounger]

Do you have a web page or pictures of your conversion. What is the record for the class?
Thanks.

[Jetmugg]

My build diary is here...

http://www.landracing.com/forum/index.php/topic,10625.0.html

The current record for a 1.5L diesel truck is right at 106 mph, timed over a running mile.  It's held by a guy driving a VW Caddy.

Steve.

[scrounger]

Oh yeah!

I was thinking of the big 4wd.

[theman53]

I remembered you Steve. You will be running a turbo and probably would be easier to have a TD manifold. What I was saying was the 1.6 TD manifold would fit and work fine. The N/A you will have to cut and weld a flange of some sort to mate a turbo to. If you are cutting and welding I would look at some flow dynamics and just cut the flange off and weld yourself up one with new mandrel bent tube, probably 1.25" to 1.5" tubing. You would want it to not be any bigger than the port pre turbo.

[Jetmugg]

Gotcha.  What I was thinking of doing was using a short run of exhaust pipe from the factory non-TD manifold, then necking it down to blend into the turbo flange.

If the consensus is to start with a TD manifold to begin with, then that's the way I'll go.

Steve.

[theman53]

Remember the longer you go away from the combustion the less energy the turbo will have as it will have more time for the exhaust to cool.