s/c for 2004
Joined: Nov 2002
Posts: 1,235
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From: Bay Area
I completely agree. Note that Comptech did not 'accidentally' put a centrifugal blower on their F20c kit. They use roots type SC's on their NSX kit, the TL/CL/V6 accord kit. The TSX will in all likelihood also have a roots blower too.
The theory behind this design is that the S2000 has a very sport bike feel and a relatively flat torque curve. The supercharger basically increases that sport bike feel. It was never intended to generate more low end torque. And this is EXACTLY what I wanted. Personally, I didn't want to modify my car to be more like a V8, I wanted it to feel like an S2000 on amphetamines. And this is what the centrifugal blower does.
I can drive around town at 3000rpm (or below) getting groceries and listening to some tunes and I'm running no boost, basically driving a standard S2000, no extra wear on the clutch, diff, or internals. But, on a nice long straight, when the high RPM cam engages, well it REALLY engages!
The theory behind this design is that the S2000 has a very sport bike feel and a relatively flat torque curve. The supercharger basically increases that sport bike feel. It was never intended to generate more low end torque. And this is EXACTLY what I wanted. Personally, I didn't want to modify my car to be more like a V8, I wanted it to feel like an S2000 on amphetamines. And this is what the centrifugal blower does.
I can drive around town at 3000rpm (or below) getting groceries and listening to some tunes and I'm running no boost, basically driving a standard S2000, no extra wear on the clutch, diff, or internals. But, on a nice long straight, when the high RPM cam engages, well it REALLY engages!
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Joined: Oct 2000
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From: Sydney
I realise the logic behind the relationship between RPM and boost with a centrifugal type blower, but my own experience is that boost increases linearly with RPM with the Comptech blower. Infact with the original pulley and the 4" pulley the line between 0 and 5.4 and 8psi (respectively) is perfectly straight.
Joined: Nov 2002
Posts: 1,235
Likes: 1
From: Bay Area
In my post I said
I did not say that I liked the flat torque curve nor that I thought the S/C improved on that feature. Don't misunderstand, I don't dislike it. But, what I like is the sportbike feel in the stock powertrain. The centrifugal blower amplifies this feel and that is the reason I went for it.
...the S2000 has a very sport bike feel and a relatively flat torque curve. The supercharger basically increases that sport bike feel.
Joined: Nov 2002
Posts: 1,235
Likes: 1
From: Bay Area
First tank I got about 18mpg as opposed to 22mpg I was getting before. I don't use my car for commuting, however, this represents only 'spirited' driving
If you drive it 'casually' (say, shift below 4K all the time) since you're getting no boost and your A/F should be close to stock, the effect on mileage will be negligible (the 50lb additional weight probably won't make any difference).
For kicks, I topped off with 100octane race gas in the last tank (so net octane around 95.5) and still got 18.8 mpg
If you drive it 'casually' (say, shift below 4K all the time) since you're getting no boost and your A/F should be close to stock, the effect on mileage will be negligible (the 50lb additional weight probably won't make any difference).
For kicks, I topped off with 100octane race gas in the last tank (so net octane around 95.5) and still got 18.8 mpg
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From: San Diego, CA
Originally Posted by Halo,May 23 2004, 07:03 PM
I can drive around town at 3000rpm (or below) getting groceries and listening to some tunes and I'm running no boost, basically driving a standard S2000, no extra wear on the clutch, diff, or internals. But, on a nice long straight, when the high RPM cam engages, well it REALLY engages!
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