993 3.8RS/993 3.8 Supercup/yes Nitrogen dampers
10-17-2003, 06:16 PM
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993 3.8RS/993 3.8 Supercup/yes Nitrogen dampers
What gives the 3.8 cup car motor more power than the 3.8 street car motor ? Anyone have the details?
Thanks!
Another question: If a race shop is installing nitrogen remote dampers on a car does the shop pressurize them? So if a shop did not have a Nitrogen tank and filled the dampers with pump air it would fluctuate like crazy when hot from moisture... what do you think?
Thanks!
Another question: If a race shop is installing nitrogen remote dampers on a car does the shop pressurize them? So if a shop did not have a Nitrogen tank and filled the dampers with pump air it would fluctuate like crazy when hot from moisture... what do you think?
10-17-2003, 06:55 PM
#2
Burning Brakes
Differences in 993 Cup engine vs. 993 RS engine:
1. Cup open intake trumpet, no air filter element
2. Compression ratio raised to 11.5:1
3. Non-Varioram, plastic intake runners
4. Cup ECU
5. Open exhaust after catalytic converter
1. Cup open intake trumpet, no air filter element
2. Compression ratio raised to 11.5:1
3. Non-Varioram, plastic intake runners
4. Cup ECU
5. Open exhaust after catalytic converter
10-17-2003, 07:10 PM
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A stock 3.8 RS motor is about 300hp and the cup 3.8 30+/- more ponies from cams/pistons/ECU...
I am thinking of converting my 3.6 to a 3.8 cup or sprint motor in December. This would be fine in SCCA, NASA and a problem with PCA but hell I can just run as a cup car. Is this an option, not as far as the rules but the motor?
I am thinking of converting my 3.6 to a 3.8 cup or sprint motor in December. This would be fine in SCCA, NASA and a problem with PCA but hell I can just run as a cup car. Is this an option, not as far as the rules but the motor?
10-17-2003, 09:44 PM
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Bill,
You would have a ton of work to do to run as a Cup car. My guess is you would be a GT2 car.
Just do the regular 3.8 motor but don't use the slip fit P&C's, guys that know better than me say to not use those on a race car.
You would have a ton of work to do to run as a Cup car. My guess is you would be a GT2 car.
Just do the regular 3.8 motor but don't use the slip fit P&C's, guys that know better than me say to not use those on a race car.
10-18-2003, 10:46 AM
#7
the conversion
I have the slip-fit 3.8 pistons and the car runs strong-- 304 h.p. conservatively. I have seen no problems with the factory power-kit conversion, which uses the slip-fit pistons. If you need a rebuild, fine, do the other pistons and the requisite machining. But it's not necessary up front, IMHO.
The conversion to a Cup car-- Bill, not sure you would ever have a real Cup car in terms of handling dynamics. The factory knows what it's doing. Of course, with your lead-foot driving technique, you could probably overcome that little disadvantage.
Cuzzin' Lee
The conversion to a Cup car-- Bill, not sure you would ever have a real Cup car in terms of handling dynamics. The factory knows what it's doing. Of course, with your lead-foot driving technique, you could probably overcome that little disadvantage.
Cuzzin' Lee
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10-18-2003, 01:34 PM
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Whatever you do, dont use air in the shocks, use Nitrogen. Dampers create a lot of heat and will increase your canister pressure. Fluctuations in canister pressure change you effective valving and damping characteristics.
Make sure to use nitrogen, yes its not perfectly stable, but much much more than O2.
Make sure to use nitrogen, yes its not perfectly stable, but much much more than O2.
