ReinerFink

9m Heads, Machine-in 3.8L pistons and cylinders, pauter rods, race cams, switch to a MAP sensor, full Motec, bigger injectors.

Its really easy if you have the entire cost of the car to spend all over again.

-reiner

Cactus

pm sent

brucec59

I think the point here, which has been repeated in many such threads, is that Porsche did not leave a lot on the table in terms of performance. These cars are not like Hondas or Subarus where you can go buy a bolt-on this or that and get more power out of the engine. It's a very well egineered package, and to achieve any real gains, you have to spend some serious dough, at which point you might as well sell the car and buy a turbo.

944/951guy

Yea. But im too in love with the RWD NA.

944/951guy

THANKS!!

Bill Verburg

I'd get rid of weight, from the ends and high as best to whittle down, get rid of the US bumpers or mod to get rid of the US safety pads,
swiss cheese the bumper




seats are fairly easy to swap out removing interior carpet & sound deadening and rear seats is also fairly easy. Strip the trunk and rear heater blower, change the washer bottle to RS, remove the lid shocks and replace w/ RS prop.

All 993 that are used seriously need to have great wheels/tires/shocks they also need to replace all the rubber suspension bushes w/ RS for a street car and monoball for a track car along w/ replacing the rubber side mounts w/ solid versions.

I had mine down to ~2700 but then had to add a second oil cooler, RS brakes and a roll bar, It's now ~ 2800 which is close to my '76 Which is simlarly equipped

JM993

Me too. See my sig - the first mod is well worth the price of admission.

Cheers,
Joe

Gasser

Yes, and put some glass on the front fenders and doors and you will be sub 2400#

TRINITONY

http://www.bmi-calculator.net/

ReinerFink

Here ya go!

http://cgi.ebay.com/ebaymotors/ws/eB...m=260509147793

You'll need to machine the case for these to fit (since they are the 109mm variant). Also, the pistons will require RSR type rods (might as well get some pauters) dunno about the condition of the rings and you can p/u some RS camshafts:

http://cgi.ebay.com/ebaymotors/ws/eB...m=220423910661

For only $1k more. Then youll want steve weiner to redo your heads with the larger valves that flow better than the RS ones.

-reiner

-reiner

Steve Weiner-Rennsport Systems

Don't forget the ECU re-programming needed for the above modifications,.....

The net results, while certainly not cheap, do make a very noticable difference in performance.

JMHO, but I'd install close-ratio gears, RS LWF, RS cams and ECU programming before doing the 3.8 upgrade unless one was predisposed to rebuild the engine.

trophy

Do you feel RS cams are worth while with stock valves/heads? Assuming the ecu is tunned appropriatly.

Steve Weiner-Rennsport Systems

RS cams do make a noticable difference with stock valves, however, the biggest gains result from using the larger RS valves in conjection with them.

Bill Verburg

The 993 RSR p/c for sale here are designed to work w/ a stock 993 crank and stock 993 rods. When used w/ 964 or other crank(GT3 is the most common) custom rods are needed.

NineMeister

When it comes to valve sizes, port sizes & port geometry, bigger is not always better. In the case of the 993 head, a bigger RS intake valve only works because the intake port is oversize to begin with, hence it's working as a band-aid for the intrinsically poor head design, but if you are going to get the best from this combination you have to be careful to select appropriate tuning parts to complete the package, so don't stray too far from the stock RS combinations.