Wagner Exhaust Manifold v RS2 Manifold

[epic]

What will I gain by running my GT 3071 with a Wagner Exhaust Manifold v an RS2 Manifold which I already have?



Clearly the Wagner is an expense. £600ish about, but the RS2 (new 2 years ago) can be resold to offset the cost.

[Rusty]

There are a few threads on this with flow bench figures, just have to search for them. As for real world, the Wagner is regarded as giving better flow so can allow higher bhp figures etc.

[Billman]

but at this stage, if you have gt3071 with .63ar then the restriction will be the turbine housing and not the rs2 mani.

[madpugger]

So with an RS2 EVO EM would it make a difference which flange? With a 3071 .63? The .63 will spool up fastest?

Thanks

[epic]

Thanks Billman:
So no gain in having the wagner then?

[90/90qs]

I have a 3071-R, I can tell you the Garrett flange is different from the KKK on the UrS4, and presumably the RS2(?). They are close enough that an adapter plate appears impossible. I ended up going with the Wagner with Garrett flange myself.
A few shots in my photobucket album, but nothing highlighting the exact problem.

http://i260.photobucket.com/albums/ii11/minipitt1/

[Jonnybravo]

They do a Gt3071 with a KKK flange as I was going to order one from Vince at CR Turbos.

[epic]

Yes mine has a KKK flange

[Jamo]

but at this stage, if you have gt3071 with .63ar then the restriction will be the turbine housing and not the rs2 mani.

Well no as your at the bhp limit of the RS2 manifold with a 3071r therefore it is a restriction.

It is a better manifold period but the true gain with it is using the T3 flange with a Garrett turbo

[madpugger]

So a .63 3071r with T3 vs same with KKK, is there a large difference? is the .63 the best version to get (i havent got the tirbo yet, just the T3 EM). I assume is give slightly less power but gives it earlier, is that right?

I hope I am not too off topic on this thread!

[Jamo]

Why do you think less power? Wagner has larger runners therefore it can support more bhp

[madpugger]

I mean the .63 vs larger ar.

[URSIMPO]

I have the GT3071 .63 with an RS2 manifold. While Mihnea was mapping my car, he said it was the exhaust wheel that was the restriction and a GT3076 would have been better with regards to keeping EGT at suitable levels. Although with the GT3076, he would of wanted the compression lower.

[4WheelDrifter]

If the exhaust wheel was the restriction on the GT3071R, then changing it to a GT3076R would solve the problem, as they both share the same 60mm turbine.

[Rusty]

Could it be a different trim turbine tho?