Undecided...What's the best SC kit for a '91GT?
12-04-2009, 01:58 PM
#16
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Check his location, buying the GT that Louie has offered for sale or having a Kuhn system installed is not really much of an option for him. A complete kit with plug and play capability makes for few options. Tim's kit meets all those demands and will provide Bogdan with the HP range he is probably looking for.
12-04-2009, 02:11 PM
#17
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Oh and ya silly turbo guys... don't ya know this is like Global Warming-- The Debate is over, we win... 
PS: besides the OP in his title even asked "What S/C kit"
PS: besides the OP in his title even asked "What S/C kit"
12-04-2009, 02:18 PM
#18
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12-04-2009, 02:33 PM
#19
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The best supercharger for a GT is a stroker....
12-04-2009, 02:57 PM
#20
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Check his location, buying the GT that Louie has offered for sale or having a Kuhn system installed is not really much of an option for him. A complete kit with plug and play capability makes for few options. Tim's kit meets all those demands and will provide Bogdan with the HP range he is probably looking for.
12-04-2009, 03:00 PM
#22
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You might as well consider a turbo option as well. http://kuhnperformance.com/products.php But since you asked if an intercooler was worth the extra money I doubt you are in the market for a turbo system.
All of the currently available forced induction systems are good in some way. They will all improve the performance of your car and put a smile on your face. I'd suggest calling each of the three suppliers and speaking with them before making a decision.
All of the currently available forced induction systems are good in some way. They will all improve the performance of your car and put a smile on your face. I'd suggest calling each of the three suppliers and speaking with them before making a decision.
12-04-2009, 03:20 PM
#24
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12-05-2009, 07:09 AM
#26
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If I had +12000$ to spend on toys I would go with the Kuhn twin turbo setup, as it appears to be impeccable in all aspects...but I would rather save 5000 bucks for something else...To this point Tim's setup is my best bet. Cheers!
12-05-2009, 11:03 AM
#27
Instructor
On most cars at the drags twin screws are generally the best because of top end.Roots style are torque monsters but the 928 is already very torquey and in the real world you will get beat by a slower car with traction.Centrifugal types are usually the last choice when it comes to the drags.A Turbo is your best option but that wasn't your question so i'm not going to go there.
#1 Twin screw
#2 Roots
#1 Twin screw
#2 Roots
12-05-2009, 11:55 AM
#28
Nordschleife Master
Canuck,
I think you need to do some more research.
Twin screw (TS) and roots are nearly the same but the twin screw has odd number vanes and they are twisted. They have a high efficency over the roots style because of this. The other main difference is that the roots provides the boost in pulses, where as the twin screw provides a more constant stream of boost. Both of these SC are great for low RPM power, In higher RPMs they fall off quickly compaired to a Centrifugal (CS) style SC.
A CS SC is basically the compressor side from a turbocharger which is being driven by the crank through gear changes to get the impellor speed fast enough to produce a charge. These tend to not create as much off the line power like the TS, but provide more power in the upper RPM ranges. If you want more HP a CS is more preferable over a TS.
If I were to boost an auto 928 that was to be driven every day, I would probably go the TS route myself.
For absolute power though, or a track car, I would never use anything but a Turbocharger.
I think you need to do some more research.
Twin screw (TS) and roots are nearly the same but the twin screw has odd number vanes and they are twisted. They have a high efficency over the roots style because of this. The other main difference is that the roots provides the boost in pulses, where as the twin screw provides a more constant stream of boost. Both of these SC are great for low RPM power, In higher RPMs they fall off quickly compaired to a Centrifugal (CS) style SC.
A CS SC is basically the compressor side from a turbocharger which is being driven by the crank through gear changes to get the impellor speed fast enough to produce a charge. These tend to not create as much off the line power like the TS, but provide more power in the upper RPM ranges. If you want more HP a CS is more preferable over a TS.
If I were to boost an auto 928 that was to be driven every day, I would probably go the TS route myself.
For absolute power though, or a track car, I would never use anything but a Turbocharger.
12-05-2009, 12:07 PM
#30
Nordschleife Master
Sorry, but there is nothing to support your information.
And anyone who knows anything about these different units will tell you the same thing. So will their dyno charts.
What I posted is the reason that Andrew Olson said what he did, in that he has the jump off the line, but the murf catches up quickly, with the slight advantage to the Murf as when accelerating you will be spending more time near redline where the CS style is operating with a higher efficency and thus creating more BHP
And anyone who knows anything about these different units will tell you the same thing. So will their dyno charts.
What I posted is the reason that Andrew Olson said what he did, in that he has the jump off the line, but the murf catches up quickly, with the slight advantage to the Murf as when accelerating you will be spending more time near redline where the CS style is operating with a higher efficency and thus creating more BHP