Lomotpk

I've done a couple of searches and have yet to find a 'conclusive' result.

I've just sold my modded 930 and am probably headed towards a 993.

Assuming the standard bolt-on options of intakes + chips + exhaust, on a 95 993 which I think has a stock base of 275 (fact check please) where are REAL people ending up?

285, 295, 300, 300+ at flywheel?

Thank you in advance,

Lomotpk

Rassel

Look at tuners homepages and see what you get.

Mark in Baltimore

Too many optimistic figures out there for this to be valid, unfortunately.

If you're looking for more performance from your car but don't want to drop a lot of coin, a good chip like the Rennsport one can add around 10-15 hp. Extracting more power from a different exhaust is an unrealistic expectation, from what I've read here.

Your best performance gains will be through a lightweight flywheel and/or a shorter gearbox.

FlyYellow

i'll just add my 2 cents as far as improving the factory design:

- best area of improvement (IMO - hands down) is suspension. The 993 (with special emphasis on US models) really is in need of improvement here. Go with PSS9's and some RS sway bars and it will feel like a whole new car.

- HP: There is very very very little you can do with bolt-on mods. Here is my experience in HP increases (as measured on a dyno with WOT)
chip: 0-3 hp
air intake: usually negative numbers
exhuast: 0 hp but might be lighter though and you may prefer the sound. that is true for both mufflers and cat bypass pipes

So now that we are over with the usual tricks - here is what i highly recommend.

RS Lightweight Flywheel
RS pulley setup
ROW transmission regear.

However most the above are NOT cheap.

Hope that helps. My 1995 dynos at 253HP at the rear wheels.

Cheers,
Boris

Derrick B.

From your sig line, your Turbo looked pretty interesting. Why'd you sell? That might help tell you if a 993 is really 'for you.' If you sold it beacuse it was too civilized, perhaps you'd be happier with something a bit less refined. <g>

I love my 993. Sometimes it feels a bit heavy though. Its probably just my slightly shot suspension. Kim, before you say it, I know! I know! (the RoWM030 he sold me is still in storage...

Tom W

I agree with Mark and Boris.

I saw about 8 hp gain with a new chip. The difference was not noticeable.

There is a very big and noticeable difference if you go the route of LWF and short gears. I had many folk comment on how quick my car was compared to stock after going this route. I also think addition of PSS-9 or other improved suspension and adjustable sway bars will make a significant improvement in the car.

Disclaimer: I'm biased! I have a LWF, short gearing, PSS-9s and RS-sways with a different chip in my 993.

GabiOsz

I found that the rennsport systems chip made a noticeable difference to my car, most noticably to the throttle responce at low and mid range torque. I have since fitted bilstien HD's and already had M033 springs on my car (which are lower by about 20mm than RoW springs) and have found the difference whith new shocks quite amazing. all worth while. I also added RSR mufflers (Gert's) for the more authentic 911 sound, very pleased with my mods all round.

993RS

You can look here and see what I did to my old car and what resulted:


RS

To sum it up: lots of work for a 30 hp increase (original was 272), but needed Varioram upgrade, chip tuning, 3.8L kit, sport exhaust.

IMO: not worth it.

The G50/21 gear mod is IMO the way to go. Most noticeable single improvement short of turbocharging.

Sachin Misra

How about an intercooled supercharger?

315hp at the wheels, aprox 400HP at the flywheel.
0-60 in 4.5 sec, 13.1 sec 1/4 mile.

PorscheDavid

Lomo...I am in the Bahston area and would be happy to take a drive down to Quincy to let you take my C4S for a spin. I did radical cams, mechanical lifter conversion (builds HP all the way to redline), LWF and RS clutch (revs quicker), FVD DME remap (advances fuel curve, settles the lumpy cams and keeps the LWF from stalling the motor), mild porting (its a racing thing)...supposedly this is all good for 35-40 HP. I also considered the 3.8 conversion, but for the money did not seem anywhere near worth the return. The varioram on the later cars also starts you off 12 HP ahead of the 95 cars. The biggest change with the mechanical lifter conversion is that the HP does not start to fall off at the higher revs... The Bilsten HDs/ROW springs and RS spec height also make it feel like a Porsche.

Sorry you sold your 930...that was a great car.

David

Lomotpk

PorscheDavid, you have a PM

Lagavulin

That is easily the biggest bang for the buck, engine-wise.

I am currently thinking about doing the same thing. However, I plan on lowering the compression ratio to 9.0:1 or 9.5:1, depending upon how boost I intend to run. Also, instead of using a roots blower, I will use a twin-screw such as a Whipple which are more efficient (..creates less heat).

How is your car running? How much boost? Did you get a wide band O2 sensor and logger?

Ray Calvo

Probably not enuf to make it all worth the time and moola.

Edward

Instead of "bolt-ons" for more HP, how about unbolting stuff to lighten the car. I recall a few here on this board have been very successful in taking off 200+ lbs of weight. Of course, how much weight you shed depends on how much you're willing to compromise noise/comfort, but along with suspension, weight reduction, in my mind, is the best performance enhancement any car can get. It pays dividends with every turn and bump in the road, or track, and is far less costly (up to a point) than HP. ...IMHO, of course.

Edward

993RS

David,
35-40 hp kind of seems a lot to me. I had done the mechanical valve lifter mod on my previous 993, but did not have the impression it provided more hp. A modified chip does not bring that much IMHO. The cams modify your torque curve, but a higher hp end value usually costs you low-end torque. There are about 25-30 hp that I do not seem to understand where they are coming from.