Supercharger?
03-10-2003 | 09:56 PM
#1
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Supercharger?
I have 2 basic questions. I'm very interested in buying a 2.5rs this summer. It has been my dream for the last few years to own one. I was wondering which one is the best idea. I know that some have a SOHC and some have a DOHC. Also, my big question is, is there a supercharger out there for these cars? I know there are two different forums for the turbo's, but has anyone ever tried supercharging?
Thanks
P.S. What is the MAP and MAF?
Thanks
P.S. What is the MAP and MAF?
03-11-2003 | 09:58 PM
#2
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iTrader: (12)
Joined: Nov 2002
Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
You're gonna get tired of that handle real quick...
There is a company making a supercharger kit for the RS called Rimmer Engineering. Don't know if they have a website.
The 1998 RS had a DOHC motor with low compression (9.5:1?), generally considered by most to be the best for forced induction, though personally I prefer my 2001. The 1999 switched to SOHC, but still has low compression. 2000-01 have SOHC, high compression (10:1), but have a MAP sensor instead of MAF. The MAP, Manifold Absolute Pressure, is far more durable, but actually not as good for fine tuning. MAF, Mass Air Flow sensor, works well right up until it gets fried, However, there was a recall on them, so the ones now in the cars may be much better, I don't know.
Also, I would be looking for the newest car I could fit in my budget. All RS have a 36 month/36,000 mile bumper-to-bumper warranty and 60 month/60,000 mile powertrain warranty. If you get one with powertrain warranty coverage remaining, you may be able to get a fresh clutch under the TSB.
There is a company making a supercharger kit for the RS called Rimmer Engineering. Don't know if they have a website.
The 1998 RS had a DOHC motor with low compression (9.5:1?), generally considered by most to be the best for forced induction, though personally I prefer my 2001. The 1999 switched to SOHC, but still has low compression. 2000-01 have SOHC, high compression (10:1), but have a MAP sensor instead of MAF. The MAP, Manifold Absolute Pressure, is far more durable, but actually not as good for fine tuning. MAF, Mass Air Flow sensor, works well right up until it gets fried, However, there was a recall on them, so the ones now in the cars may be much better, I don't know.
Also, I would be looking for the newest car I could fit in my budget. All RS have a 36 month/36,000 mile bumper-to-bumper warranty and 60 month/60,000 mile powertrain warranty. If you get one with powertrain warranty coverage remaining, you may be able to get a fresh clutch under the TSB.
Thanks
03-21-2003 | 01:06 AM
#5
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Originally posted by RokketRide
I heard that Rimmer was no more.
I heard that Rimmer was no more.
03-21-2003 | 10:41 AM
#8
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the compression ratio for the 98 2.5 RS is 9.7:1 and with the MAP equipped cars you cannot boost over 2 psi without some kind of engine management or a voltage clamp. The MAP voltage exceeds the maximum limit ~4.3 volts IIRC and you experience a fuel cut even if you are not at redline. You can boost about 5 PSI on a 98 without any kind of engine management you just need the proper fuel delivery. Good luck finding one though.
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