how to supercharge an N/A?

[WabTheKing]

obviously you would need a remap

but what about vacume valves etc would you have to fit check valves on them etc?

looking at what would be involved in fitting an eaton M90 to my 4.2 v8 engine

cheers

[Greg_S]

might be worth having a chat with the bloke on audifans who has supercharged his V6 engine

[AUDI9020V]

ya guy called fast28

[Micky B]

It is easyer then to turbocharge. My customer had a ford mondeo v6 st 175 which has been superchaged, we only installed a vortech charger, a bigger fuel pump, bigger injectors, a boost referenced fuelpress regulator(i think stock v8 audi can be used ) and to have better result, we changed to a dta pro8 ( ford has a hardly mappable ecu, audi v8 has better). Supercharged engine responds similar to n/a, so u dont need map sensor! If the maf sensor can measure the bigger incoming air mass no problem to remap like a tuned n/a.
We measured for that ford 250 hp@7000rpm@ 0.8 bar boost.
80 horses increase on a stock engine. CR 10-10.5:1 !!!

[Micky B]

The problem with a supercharger is it heats up the air more then turbo, so for the best result u need to install a good air cooler, maybe a water air cooler.

I've planned the same project as u a few years ago. My opp is: whipple changer with water/air cooler, modify intake plenum, forged rods,pistons,ported head ,big fuel pump, 2 injectors/cyl for drivebility and economy+ dta ecu maybe mod cams.
estimation: 500hp@6900 rpm @ 1 bar
580nm@5000 rpm @ 0.9 bar (boost changes over the rpm range !!!)
with charger: screw type, volume 130 cu in/rev, belt ratio 2:1

[GT500]

Aye up dude,

Just read latest Audi driver, ABT are doing a inlet for the V8, they s'charge the S4...
Might help.....

[Sweeper]

Wab: The friend of mine try to turbocharge his S4 94 4.2L engine for the last few years.... No success yet.

Supercharging is easier but i don't think that much easier. Btw i've seen/hold original MTM supercharger for 4.2l engine. It costs 60 or 80K USD from them =] , need a photo :> ?