Thought I'd start a thread here on a subproject of my main project, which is rebuilding my 550 Maranello engine to be a 6.0 liter semi-hotrod motor.
I had picked up a 456 intake manifold awhile back, with idle thoughts of trying an ITB conversion on the 550, more for the bling factor than performance, as the 550 manifold with its variable length tract is proven to flow better than the earlier, fixed tract 456. However, no one's tried a 456 manifold with an ITB conversion, so it may turn in some respectable numbers. And of course, it certainly tops the 550 manifold in the "cool" department.
So here's a stock 550 manifold, and the center plenum is the variable tract mechanism. Under that cover are 12 butterflies that open up at 5500+ to let the motor breathe better on the top end:
And here's the 456 manifold - no center plenum, just the cross ram setup:
So I lopped off the side plenums on the 456 manifold, took stock of my GSXR ITB's from an old project and here we go. Hopefully one day, this pile of parts will become an ITB setup that I'll use to break in my 550 motor on a buddy's engine dyno here in Houston:
As soon as Mark can find some time to work his magic on these non-concentric runners, and weld some stubby pipe extensions onto them and blend things in so everything is concentric again
:
Unfortunately I don't have a proper shop, nor any machine tools or welding equipment, so my updates to this will be a bit slow in coming. Anything that requires more than a cordless drill or a propane torch, I have to farm out, unfortunately
Take a look at the BMW S62 ITB's, I've been very tempted to utilize them on a ferrari engine for a awhile now. I think the Porsche guys are using them now too.
