M30 e30 with s38 throttlebodies AND factory plenum

[Dillonsbimmers]

Would the s38 itb's, with an adapter on an m30, fit in an e30 engine bay with the factory M5 plenum?
Or, alternatively, would there be another facory plenum that one could fit there?
Im looking to boost an m30 using the factory s38 itb's, and i love the m5's plenum stlying!
Any advice is appreciated! :D

[ttrousdell]

It can be done with adapters.
http://www.bimmerforums.com/forum/sh...n-m30-test-fit!

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[Alpina]

Its a waste IMO,,, the S38B36 vs M30 is actually a 100 hp top

Cylinder head,, ITB ,, plenum and ECU

the M30 with high compression and ITB and proper tune is ,,perhaps a 260 hp

[kronus]

ITBs aren't for power

[Jb325is]

It is do-able, but like Kronus said don't expect gains from it, its more to augment substantial modifications that you've already done and improve throttle response. With standalone, a big cam, high compression, lots of port work and some added displacement you could get close to 300whp with an m30, and in that application ITB's would be a worthwhile addition, but we are talking $7k + . These days an s54 swap is more cost effective (and you get ITB's to boot).

The biggest fitment issues are the thermostat housing, which has to be re-routed, the brake booster, and the firewall if your engine is decently far back.