light weight flywheel in 944 N/A, any info?
11-10-2003, 12:12 AM
#1
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light weight flywheel in 944 N/A, any info?
Anyone have any info on the pros/cons of having a lightweight flywheel in a '88 944 N/A? I'm putting an aluminum tube in and while I'm at it, change the wheel while I've got it apart if the benefit out weighs the cons.
James
James
11-10-2003, 12:18 AM
#2
Three Wheelin'
I herd double clutching is needed durring down shifts because of the reduced mass of the flywheel. But Im not sure if thats true as I never drove a car with a light weight flywheel.
Christian
Christian
11-10-2003, 12:23 AM
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Ah, I was thinking exactly the same thing! I found this thread: old thread. I have a lightweight flywheel for the 968 but that's b/c the 968 has a dual-mass flywheel.
11-10-2003, 12:45 AM
#4
Race Director
Originally posted by DerSchlechtSpecht
I herd double clutching is needed durring down shifts because of the reduced mass of the flywheel. But Im not sure if thats true as I never drove a car with a light weight flywheel.
Christian
I herd double clutching is needed durring down shifts because of the reduced mass of the flywheel. But Im not sure if thats true as I never drove a car with a light weight flywheel.
Christian
My wife drove our Infinity G20, first with a lightened stock flywheel and then with an aluminum aftermarket one and never had a problem. Not once. I assure you she doesn't even heel/toe, let alone double clutch.
There is so much BS out there about low mass flywheels it isn't even funny.
11-10-2003, 01:30 AM
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Very interested myself. I'm considering putting an S2 "single mass" flywheel on my 968 engine. The pro's would be quicker rev response of course. I've been wondering about the con's though. Obviousley quicker rev changing could work in the opposite direction. Loads would allow RPMs to drop quicker due to less momentum, might be inconsequential amount though. And I'm guessing less weight might cause more vibration due to less ability to stabalize? In my case, I'm wondering if the use of the S2 flywheel might give me more clutch replacement options then a 968 clutch. Definatley would like to know if anyone can assist.
11-10-2003, 07:51 AM
#6
Guys - enough is enough with the lightweight flywheels on 944's. There is no downside whatsoever (except $600 for a Fidanza), only benefits.
The weight of these Mack truck crank & flywheels are insane. The 944 crank weighs more than a Lt1's - and the flywheels that I have taken off weigh 16-17 pounds.
You do not have to double clutch, blip the throttle, pick your nose or anything. It will however, rev 200 rpm's higher only upon initially starting in the morning - so if that bothers you, watch out.
The weight of these Mack truck crank & flywheels are insane. The 944 crank weighs more than a Lt1's - and the flywheels that I have taken off weigh 16-17 pounds.
You do not have to double clutch, blip the throttle, pick your nose or anything. It will however, rev 200 rpm's higher only upon initially starting in the morning - so if that bothers you, watch out.
11-10-2003, 09:19 AM
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Roberto,
For my 968, I went from a dual-mass flywheel to a Fidanza flywheel (cheaper and lighter than a replacement dual-mass flywheel). For this application, I've noticed faster changes in the RPM. The only downside is an annoying vibration at around 2300rpm -- other people with 968s (and Bimmers with dual-mass flywheels) have also noted this effect. You also won't notice with the engine under load (with a little gas) -- the only time you notice is in stop-and-go traffic at 15mph.
However, in my 944, I have a 944S2 flywheel mated to my 968 engine and I have experienced no vibrations at all -- but then I also have a 944 bellhousing, PP, and clutch, which might be different from your setup. And I also don't stay at low rpms for very long...
For my 968, I went from a dual-mass flywheel to a Fidanza flywheel (cheaper and lighter than a replacement dual-mass flywheel). For this application, I've noticed faster changes in the RPM. The only downside is an annoying vibration at around 2300rpm -- other people with 968s (and Bimmers with dual-mass flywheels) have also noted this effect. You also won't notice with the engine under load (with a little gas) -- the only time you notice is in stop-and-go traffic at 15mph.
However, in my 944, I have a 944S2 flywheel mated to my 968 engine and I have experienced no vibrations at all -- but then I also have a 944 bellhousing, PP, and clutch, which might be different from your setup. And I also don't stay at low rpms for very long...