Wastegate Positioning

[Roundy]

Hey Guys,

Due to a stuff up in specifying my new exhaust manifold i need to consider options to make the wastegate fit.

Is there any issues with running the wastegate somewhat further away from the manifold?

atm it has a very small stub that leaves the (rather large) tial wastegate fouling the bonnet, so was thinking on extending the stub to locate the wastegate somewhere more suitable.

As far as i understand, if it is easier for the exhaust to go through the wastegate then there is no problem.

Cheers
Nathan

[NME308]

Hi there,
I can't see a problem with the concept.
There are plenty of examples of big name manifolds with the wastegate on the end of a 'runner' lenth extension to avoid fouling things.
Like you state if the passage to the wastegate provides no further restrictions then all is well.

Cheers,
Jason

[Tocchi]

mount it on the rear housing?

this method is used a lot for 6Boost manifolds due to them scavenging so well, thus this is needed to help eliminate boost creep and spikes.

eg:

[e30-323ti]

I was advised the important thing was to have the WG coming off the collector at as shallow an angle as possible, and upto 12" long would be fine.

I ran mine off at about 30º to the main exhaust flow, it is also a twin-scroll, so kept it divided upto the valve, so kept it short.

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