034 Exhaust Manifold flow results

[RufCTR]

Dave is correct, we did use a flow-bench to test the manifolds. While there are limitations regarding interpretation of the numbers with this method, it is a fairly accurate way to at least compare the flow-rates between manifolds. I personally run an RS2 Evo manifold on my 95 S6 with a GT2871R/K26 hybrid turbo. You guys can always contact me with any questions.

[UrS4boy]

Dave is correct, we did use a flow-bench to test the manifolds. While there are limitations regarding interpretation of the numbers with this method, it is a fairly accurate way to at least compare the flow-rates between manifolds. I personally run an RS2 Evo manifold on my 95 S6 with a GT2871R/K26 hybrid turbo. You guys can always contact me with any questions.

And Carsten Wagner, the designer/manufacturer (Wagner Engineering/Tuning) is on this forum (Lupo911) so there will always be answers to questions about the manifolds.

[JP]

Something someone has to remember about flowbench work is that it can be achieved in various means. Where you look at the figures of the stock AAN vs RS2 mani for example and go hold on not much difference yet we can make 420 on an RS2 mani and not on the AAN I tweaked an AAN mani and made 420hp. The restriction was not on the individual runners comparatively it was the design of the collector.

Quite correctly when you flow on a flow bench the easiest testing method is on a single runner at a time basis. Whilst functioning on a vehicle this will not happen and one has to look at the turbulence created by the cross over paths and the volume that has to pass through the joining runners into the collector. The restriction on the AAN manifold was that multiple runners where trying to squeeze through a space half the cross section of a single exhaust port. Open these up to allow for less turbulence and free flow and now it is capable of the same power as an RS2 manifold which has got a lesser restriction around the collector from stock.

I'm currently running the Wagner EVO K26 manifold machined and ported and if I was sticking with the power bracket I was at I would keep it it's an effective bang for your buck. However I've had quite enough of the K26/30R hybrids as the first one did not last 500 miles and despite a rebuild now less than 2 yrs later has bitten dust right royally.

[Billman]

Dave is correct, we did use a flow-bench to test the manifolds. While there are limitations regarding interpretation of the numbers with this method, it is a fairly accurate way to at least compare the flow-rates between manifolds. I personally run an RS2 Evo manifold on my 95 S6 with a GT2871R/K26 hybrid turbo. You guys can always contact me with any questions.

can you maybe do the same test on a MTM exhaust manifold? I think it is the only one missing from the lot.

[Jamo]

The MTM has been done well it was on motorgeek anyhow

[asperilla]

The MTM has been done well it was on motorgeek anyhow

Pics? Links?

Then if someone could do a Summary this STICKY would be complete untill the end of time..

[Jamo]

you will have to search motorgeek for that information