Has anyone done it yet?

[Porschekid962]

Kicking ideas around for fun motors with friends the other night and we some DFA, DFV, DFX, gt3rsr and some other fun heads laying on a bench comparing them and were wondering......Has anyone ever removed the intake port runner from an air cooled 911 head? We were thinking if you could remove the runner, weld up the head a bit to provide material to bolt a very short throttle body onto and possibly even position an injector in there you could pick up some more performance with proper intake length and possibly resonance chamber tuning along with some dyno time and exhaust tweaking. We were just trying to figure out if anyone else has ever done something like this to position the throttle body closer to the valve.

[Flieger]

MFI throttle butterflies were pretty darn close to the valve and the injector was right there to. If its in the chamber, the head looks like swiss cheese if you have 2 plugs, an injectore, bug valve (or 4 valves). MFI has the nice trumpets for high RPM ram air power too.

[Porschekid962]

Its a decent system from a long time ago. The motor to be modified is running Jenvey itb's and bosch motorsport injectors. The mfi butterflies are pretty close to the valves but still not that close, plus we are thinking of a closed loop 12 injector setup with injectors down low in the heads and much higher up in the trumpets or above them depending on how short we can make them with a proper sized resonance chamber. I like the ram air power though lol.

[jpnovak]

Steve Weiner has some previous posts about installing a 3.6 intake on top of short ITBs for impressive gains. This should be relatively simple given the rubber coupling bushings to the injector blocks.

[Porschekid962]

That is basically what the RSR's ran. I am talking about machining the head ports and making them almost level with the fins leaving enough material to bolt something to.

[Jeff Alton]

So you want to take the intake port boss/flange right off? Interesting idea.

Cheers