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Was chatting with my buddy about his new to him 7.1, and I made a tongue-in-cheek comment about him needing to get accustomed to it sounding like it was chewing marbles at idle and on clutch disengagement.
He disavowed any such impressions, and that got me thinking - Does my 7.2 non-RS have a LWFW ?
My inherited records for this car were not thorough when I bought it. It certainly had a good bit of preventative and regular maintenance done, but no performance mods, and so it never occurred to me until now that a PO might have swapped in a LWFW.
I've had other P cars with LWFWs, and this car sure ticks all the boxes (lots of chatter at idle and clutch engage / disengage, super quick revs, wants to stall easier, etc.). So, is there a definitive way to tell if it has a LWFW without dropping the trans ? I'll be installing a Guard diff later this season, so might take that opportunity to do the clutch as well, but in the meantime, my curiosity is piqued.
Edit: as pointed out below, .1 GT3 you can tell based on crank pulley. For .2, both standard and RS car use the same crank pulley so you cannot tell.
That is the crank pulley for a LWFW car. Highly unlikely it would have been swapped if your car didn't have a LWFW. So I'd put my bets that your car does have a LWFW.
That is the crank pulley for a LWFW car. Highly unlikely it would have been swapped if your car didn't have a LWFW. So I'd put my bets that your car does have a LWFW.
Revelatory! How can you tell the difference / what is the difference? I guess now I get to stress out about cam actuator bolts and harmonic dampers with the cool RS kids.
Revelatory! How can you tell the difference / what is the difference? I guess now I get to stress out about cam actuator bolts and harmonic dampers with the cool RS kids.
Edit: as pointed out below, .1 GT3 you can tell based on crank pulley. For .2, both standard and RS car use the same crank pulley so you cannot tell.
Let others chime in to confirm I'm correct, but if I was looking at your car with that pulley, I'd certainly say it has LWFW.
The aesthetic difference between the two, as shown in the link I posted earlier is that the LWFW one doesn't have all of the holes, whereas the DMFW one does have all of those holes on it.
I can't say what the actual mechanical difference is though. I'm guessing weight? Also a different bolt and washer. There's some more details here too.
Revelatory! How can you tell the difference / what is the difference? I guess now I get to stress out about cam actuator bolts and harmonic dampers with the cool RS kids.
you ever watch that video of me forcing DME lvl 1 hits… it’s on here somewhere. You can see how fast an lwfw spins up.
basically just showing the LWFW creates enough momentum fast enough to hit lvl 2 DME if revving from idle
you ever watch that video of me forcing DME lvl 1 hits… it’s on here somewhere. You can see how fast an lwfw spins up.
basically just showing the LWFW creates enough momentum fast enough to hit lvl 2 DME if revving from idle
Not sure I have, but I've always thought there was no mechanical way my car could possibly rev any faster . . . And I have seen the Sharkwerks videos and other RS rev vids. Seems the same.
Interesting development. I'm planning to inspect cam bolts in a few weeks when I re-do my exhaust setup. Guess I'll just budget that annually from now on.
you ever watch that video of me forcing DME lvl 1 hits… it’s on here somewhere. You can see how fast an lwfw spins up.
basically just showing the LWFW creates enough momentum fast enough to hit lvl 2 DME if revving from idle
Originally Posted by jreifler
Not sure I have, but I've always thought there was no mechanical way my car could possibly rev any faster . . . And I have seen the Sharkwerks videos and other RS rev vids. Seems the same.
Interesting development. I'm planning to inspect cam bolts in a few weeks when I re-do my exhaust setup. Guess I'll just budget that annually from now on.
I’ve wondered the same about my heavily tracked 7.2 non-RS…here’s my pic. Curious what the OEM pulley is supposed to look like; tried searching online but I’m probably not using the right terms.
I’ve also experienced similar characteristics as OP described, but chalked up the “wants to stall easier” to my lack of experience driving her! Lol
That is the crank pulley for a LWFW car. Highly unlikely it would have been swapped if your car didn't have a LWFW. So I'd put my bets that your car does have a LWFW.
are you sure about this? My 7.2 is 100% stock and it has the same pulley shown in OPs pic. Zero clutch chatter, which is actually one of the reasons I went with a base over the RS.
I’ve wondered the same about my heavily tracked 7.2 non-RS…here’s my pic. Curious what the OEM pulley is supposed to look like; tried searching online but I’m probably not using the right terms.
I’ve also experienced similar characteristics as OP described, but chalked up the “wants to stall easier” to my lack of experience driving her! Lol
This is the stock pulley that Sharkwerks showed in their journal of this 2010 GT3.
Thanks for confirming @RapidGT I also recalled that the .2 shared the same pulley between the base and the RS, presumably because the .2 has the “mid weight” flywheel which is just a lightened dual mass.
03-16-2023, 05:51 PM
Existential LWFW Question
