SQ vs MTM K27 exhaust manifold

[|Maku|]

Hey!

As many of us know there are different SQ ex. manifolds. Does anyone know is there any flow differences between SQ and MTM K27 manifolds? Or are the runner diameters the same?

SQ and MTM K27

Marko


EDIT: Mark's post from the past.

Doug,
I believe I am in right in saying that the K27 hot side will not fit your RS2 EM.
The collector outlet (flange) on your RS2 EM is 50mm diameter and the hot side on the K27 is (I think) 60mm. The K27 turbo hot side is designed to fit the audi SQ EM which has a larger flange.
This is something that you will have to bare in mind when going for a bigger turbo to fit your EM. It IS possible to get a big turbo (hot side) to fit your EM, but you will have to hybridize the turbo and hot side housing to fit.
To illustrate:I have an MTM SQ (S1) EM, these usually come with the larger SQ size outlet, but MTM also machine them with the smaller 50mm outlet to take the K26/27 that they use as part of their tuning options, I have the smaller outlet variant. My turbo is basically a Turbonetics/Garrett T3/T4 unit fitted to a copy of the KKK #8 hot side housing, but this has been modified to take the Turbonetics stage three turbine, 63mm, roughly about the same size as the SQ turbine.

Cheers, Mark.

[Jamo]

MTM has smaller runners IIRC. Personally go for the Wagners it outflows both of them.

[|Maku|]

MTM has smaller runners IIRC. Personally go for the Wagners it outflows both of them.

Jamo, if I remember it correctly MTM K27 manifold runners are 38mm (same as RS2 manifold). SQ manifold runners are bigger?

Btw, Im familiar with flow test results:
Manny ______________1___2___3__4___5_
AAN________________143 134 178 130 131
ADU________________163 148 152 134 152
SQ_________________175 146 169 174 205
SQ replica___________198 212 204 217 202
ADU high flow replica__204 180 229 181 186
EFI tube manny______223 232 225 232 217

[Jamo]

I've seen an MTM manifold in the flesh and it's runners are smaller than I expected. I didn't however get measurements.

The runners were not 38mm on the SQ or replica AFAIK, Lupo911 can confirm

[saltinot]

I'm no engineer so I'll go ahead and apologize for my ignorance, but would larger runners increase spool up time?

[UrS4boy]

I'm no engineer so I'll go ahead and apologize for my ignorance, but would larger runners increase spool up time?

If this is real, it's because Q = flow = velocity x area = V x A. The larger the area, the lower the velocity for a given flow. With lower velocity, there would be less of a concentrated "jet" pushing on the blades of the hot side impeller.

Like I said, if this is real.

[twoqu]

Ur Sport manifold has 38mm runner from flange. Also Cyl 1 and Cyl 5 merge into the top of the manifold. Looks like the Wagner Sport also follows that design.
The MTM one merges Cyl 1 and Cyl 4 at the top. Not sure of runner size.
So there are differences between them.
From the data published, I am surprised that the original Ur sport manifold flows so unevenly when compared to the Wagner Sport manifold. I remember reading somewhere that the Ur quattro manifold was designed to handle 450bhp!

[|Maku|]

Jamo, if I remember it correctly MTM K27 manifold runners are 38mm (same as RS2 manifold). SQ manifold runners are bigger?

My bad, I meant SQ manny runners are 38mm.

[|Maku|]

The runners were not 38mm on the SQ or replica AFAIK.

I have one SQ manny PICTURE to proof otherwise.

[|Maku|]

Jamo, if I remember it correctly MTM K27 manifold runners are 38mm (same as RS2 manifold). SQ manifold runners are bigger?

Btw, Im familiar with flow test results:
Manny ______________1___2___3__4___5_
AAN________________143 134 178 130 131
ADU________________163 148 152 134 152
SQ_________________175 146 169 174 205
SQ replica___________198 212 204 217 202
ADU high flow replica__204 180 229 181 186
EFI tube manny______223 232 225 232 217

My bad, messed up the order and a view figures.

Manny_______________1___2___3__4___5_
AAN________________131 131 178 135 144
ADU________________152 134 153 149 163
ADU high flow replica__187 181 229 180 204
SQ_________________176 147 169 174 205
SQ replica___________199 212 205 217 203
EFI tube manny______224 232 225 232 217