How difficult could a centrifugal supercharger installation be on the 103? I see them being added to all manner of engines these days. Couldn't you leave the CR stock and use low boost of 5-6 psi? How would you properly enrich the fuel mixture? Is the computer in stock form capable of delivering enough fuel? How about injectors, any insights? Fabricating a mounting and doing the plumbing should be fairly simple and the power gains should be substantial but hopefully within the drivetrains limitations. I just can't swallow $15k for a 3.6 or 3.0 turbo setup. Those mods give 275-300hp and I would be happy with 225 and the typically healthy torque boost of a charger. I would like to try it but I am concerned about getting enough fuel in, any ideas?

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90 300GE 5sp
95 740iL
86 944 Turbo

A centrifugal supercharger produces its boost as a linear function of rpm. Hence you will not get much low-end gains which is where the M103 is weakest. Were I building one I'd sooner look into going into a twin turbo setup...say a K-03 turbo for the low end and a larger size for top-end. No doubt you'd have to deliver more fuel. I'll defer to Benzmac for engine management issues... Either that or put an eaton (twin-screw) style supercharger on the M103 as they produce boost almost instantly. This would help low-end performance greatly.

Hope this helps...Lee

I just can't seem to get a break on this issue. I still prefer the supercharger to any turbo setup. The extra heat and exhaust plumbing exceeds my desire for more power. I suspect that the intake and exhaust plenums on an Eaton are more complex than the simple tube in and tube out of a centrifugal charger. I suppose that the charger could sit on top of the intake manifold where the air cleaner resides now and an intake tube/filter assembly could be fabricated. I'm doing it in my head, of course my G has more room underhood than a 124. The drive would be fairly simple if the charger was on the manifold. I'll have to check my space limitations and the fuel issue needs to be addressed yet.

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90 300GE 5sp
95 740iL
86 944 Turbo

Give Paxton, Vortech, and ProCharger a call (Import racer Magazines on news stand should have ad's for them) and ask them for shop recommendations in your area? This may be worth a shot. If no luck, maybe you can give the guys over at Kleeman (Denmark, http://www.kleemann.dk/ ) another twist of the arm to see if they want to play on American soil yet? Boy...., they could be tapping a huge market over here?


A centrifugal supercharger would be a good choice for the person who needs the power at the low and mid levels (typical American driving style), but the problem is that there are not a lot of choices out there for the frugal shopper. A highly recommended shop in your area should be able to design and build something for you, but at what cost I have no idea?

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Ross
96 C280, Greenish Black