So, I'm nearing the end of the bugeye rally car build and need to start concentrating on the engine for next year.

I've noticed some cars running a 180 degree turned inlet manifold, basically allowing the throttle body to face forward, I think I would find this beneficial as I have decided to run a FMIC on the car and understand making the feed pipes short would help with reducing the resultant turbo lag.

I see that there are spacers available on the net, I assume this is all I need? Will I have clearance due to alternator or is there a relocation required for that as well?

I've noticed some Impreza's run with the turbo slightly pointing up and towards the OS wing of the car, again I think this would be beneficial for the same reason above as well as acces sto the turbo for quick swaps if failed on event. I'm planning on fitting a VF34 as it appears these spool up quite quick and use better bearings.

Can anyone educate me on these setups or point me to a good link, I have googled but mainly get pictures of these setups but nothing with why they've been done or benefits.

Many thanks
Nige

 

To rotate the manifold you need to do quite a bit more then add spacers. You need to extend various bits and bobs and relocate the alternator etc. It also means you have less room for the inlet pipe as the other side of the inlet manifold is not as high. You can use spacers but when I tried it it was still tight. There is a lot of messing around with bits to get it right but it's not that hard to do. You will find threads on doing it if you search as plenty have done it. I'm not convinced its worth the effort having messed around with it recently. But each to their own. If you are at the high end of tuning then it will probably make a little bit of difference.

On some turbos you can spin the compressor housing around to a different position (clocking) but you have to grind off a little stud and then remount the actuator.

 

He's on about a rotated turbo set up, so no real need to worry about the inlet pipe fitting inder the manifold. Obviously there's other stuff to consider though, the probable need to go mafless etc.

Subaru4You list a rotated set up for OEM flanged turbos, http://www.subaru4you.co.uk/exhaust/s4y.shtml

 

I have a rotated standard turbo downpipe and full slip jointed 3" revolution exhaust for £100 posted. Currently has a t6 flange on the downpipe if interested in rotating a vf34. Not sure the flange on a vf34 though but sure it would be cheap to weld a new flange to gfit. That was exactly what i was going to do but going rcm rotated and gt30.