Anyone recognize this manifold?

[clevertd]

A board member of bf.c in the E24 section picked it up.

[Kyle in NO]

Looks like a Dinan.

[M635CSi]

Looks like a Dinan.

x2

[Boru]

Had one. It's a Dinan.

[DMNaskale]

That thing looks like it chokes down a little bit between 5 and 6, that can't be good for the top end.

[Boru]

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

[russc]

Yup,
Every time the downpipe is removed from my car, my mechanic curses me!

RussC

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

[T_C_D]

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

You think you could do a better job?

[Tusker]

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

You think you could do a better job?

I can tell a good egg from a bad one and I'm not a chicken

[Boru]

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

You think you could do a better job?

I can't, I'm not an engineer.

[Duke]

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

I was going to post the same thing but GOD FORBID I say critical against another’s turbo kit design.

I am sure that that Dinan kit will make over 300 HP (not much more) and lots of people would be happy with that. As they were in the 80's.

The above statment does not apply to Russ C's modified Dinan system.

[///ARINUTS...]

Yup,
Every time the downpipe is removed from my car, my mechanic curses me!

RussC

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

What is the reasoning for placing the turbo that far back?

[turbodan]

Yup,
Every time the downpipe is removed from my car, my mechanic curses me!

RussC

It's actually a poor design. The turbo is placed too far rearward requiring the down pipe bend to be "cheated". Turbulence and/or restriction just after the turbine hampers the turbos performance.

What is the reasoning for placing the turbo that far back?

If I wanted to act like I knew what I was talking about, I'd say it was to keep the #6 exhaust port from creating turbulence right at the turbine inlet. This way it would have #6 going with the flow through the rest of the manifold. It makes sense, but then again I have no idea what I'm talking about.