Calvin's BenchRacing thread

Rob

Manifold is cast. although it is possible to weld it, it is not a simple task and is somewhat prone to cracking afterwards. I also think it would sit too high and too far forward.

I am definitely not one to say something can't or shouldn't be done but i wouldn't go near it.

calvintibia001

If I make a middle section and sandwich it between the head and the manifold, which is built will straight angled pipes ? I could weld straight : P
But yeah the T3 Flange might be a problem : (
Might just pay a bit get the OBX Manifold and flip it

Rob

creative.. but would probably look terrible and work average... i really wouldn't recommend it.

calvintibia001

This is the idea that I am actually trying to do literally, get this:

get a 2.5" 90 degree pipe and a T3 Flange, weld one side of the pipe to the OBX Transition flange thing, and the other side to a T3 Flange, drill a hole and extend a pipe for a external waste gate and wideband o2. So it will become a Top mount, it got a waste gate, a wideband, everything you need and bolt onto the stock turbo manifold.
And I was wondering if it would put too much weight on the stock manifold and should I brace it on the studs : (

Spac

Stock NA exhaust manifold in the normal spot, with a "J-pipe" can put the turbo where-ever you want. Better HP than a stock turbo exhaust manifold too (if everything else is equal).

Remember that "hi mount" turbo manifolds are "cool" because they mean you have a turbo that's too big to fit down low, and/or an exhaust manifold that is too hard to build if the exhaust manifold.
Simply mounting a stockish turbo up high is really quite lame.

calvintibia001

This actually looks super neat, I am thinking becoz I might throw a Holset on it, but how do he find a flange (the side that bolts onto the stock exhaust) for the J pipe ?

Rob

That is a much better idea

Spac

calvintibia001;3069 wroteThis actually looks super neat, I am thinking becoz I might throw a Holset on it, but how do he find a flange (the side that bolts onto the stock exhaust) for the J pipe ?

There's one on your car already...

calvintibia001

I mean the flange to bolt the J pipe onto the exhaust flange ? chop the flange off the down pipe ?

Spac

Yes. You could get a new one cut, but why bother?

calvintibia001

Where could I get one ? Or do I have to custom CNC one ?

Ex850R

Buy one at muffler shop or get a nice V band clamp set

calvintibia001

chop exhaust flange and weld up a V band ? and then make a Vband to T3 ?

Spac

Which bit are you talking about?

1. Exhaust manifold to J-pipe. Use the original NA downpipe flange.
2. J-pipe to turbo exhaust inlet. Buy the appropriate flange plate to suit your turbo.
3. Turbo outlet to exhaust. But the appropriate flange plate or V-band to suit your turbo.

calvintibia001

The from the stock exhaust manifold to the J-Pipe, just chop the original flange or buy a new one (if buy a new one, I could get it in any exhaust shops?)

Vee_Que

For a stock setup considering you already have the turbo manifold it's not worth it. Note the photos are of 16v engines. Which would be worth doing factoring in the stock manifold flowing well enough. Ebay probably can help you with the flange if needed. But then you will have very little room on that side for the holset downpipe too given the steering being in that side too.

calvintibia001

the NA exhaust manifold hv the same flange on the 8v and the 16v, so I might just use the same deisgn, and the dump pipe will be going closer to the block than the stock location, had a look and my mate that is going to weld up the dump pipe, he reckon should hv enough space

jamesinc

Don't forget about the steering column!

calvintibia001

I know, we sort of measure it, and there is room enough for a 3" Dump, but I think I will wrap it in like Heat shielding blanket stuff to not damage the steering column and too hot to the block

Vee_Que

The fibreglass heat wrap is good but messy. Need to wet it for a start and its smokey the first start.