VT928

Having gotten the car out a few weeks ago I am thinking of adding significant hp to my 1980 Euro S. I am Looking at a stage one 928 Motorsports supercharger kit. Carl has been helpful with information and answering my questions. I am also interested in comments on the supercharger kit from people that have installed it on a CIS car. I a worried about the 10.1 compression ratio of the 4.7 Euro motor and how much boost it will handle I am thinking about being in the neighborhood of 5/5.5 lbs of boost. I thinki that it will increase the crank hp significantly. The car currently dynos 273 at the wheels with the modifed exhaust on it. Looking to get to 340+ wheel hp, which means 400 at the crank when I am done. The second consideration is the strength of the driveline, will the extra hp be to hard on the stock components? bear in mind its a 30 yo car.

Any comments will be greatly appreciated.

Paul 1980 Euros S Red/ Blk Lea

chewy8000

I ordered a "tuner" kit exactly a month ago today. I'm looking forward to seeing the UPS Santa arrive at my door. In the meantime I need to figure out why the cars still not starting.

I'm not sure about the CIS cars or the 4.7L for that matter, but I know there are a few people here in 4.5's running around 7lbs of boost without hick-ups. Think the stock driveline will handle the extra ponies just fine.

hacker-pschorr

More like 17lbs

Hopefully I'll be firing her up today after work.

My car is the Murf928 prototype for the L-Jet / MAF 16V cars.

danglerb

I've got the same target rwhp in mind, "around" 350 rwhp, and I have been chewing over how to do it for a couple years. My choice is to increase the bore to 104mm, fitting 968 pistons to run on the bare Alusil cylinders, upgrading to a more aggressive than Euro S cam profile, then tinkering with the intake and tuning (LHjet brains).

Euro S CIS I suspect even at 5.5 psi will be a tuning adventure that never really ends.

RKD in OKC

When I had my 90 GT I wanted more power. It was putting down about 315 to the rear wheels. Since getting the GTS I haven't thought about it so much.

andy-gts

I had the raptor on the gts and found the "feeling of power, ie torque" was missing until about 4000rpm and although I want to live there at 4000 it was not reallistic." I took the sc off and sent the car to greg Brown for modification in Strokerville.
the gts always disappointed me in comparison to the gt. granted it is a auto and that is alot of the difference I guess.
Beautiful car , so many plus's I am just getting the motor up to the level I think it should have been.

If I were to get a sc now I would not get a centrifugal one but a twin screw if it can be had.

Much more usable increase torque and you dont have to be living at high rpm

andy

Hold On

I`m in the process of installing a 928 Motorsports Stage 1 on my 4.7L. The kit is good , but mine got shipped with some damaged parts, nothing that I cant work with, but damaged nevertheless. Parts are still trickling in after 7 weeks. I will let you know how it turns out when it is completed. Its a good start to build on.