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RXP.
Monza


Joined: 24 Oct 2017
Posts: 183



PostPosted: Tue Jan 08, 2019 10:19 am    Post subject: Reply with quote

Hey Ken,

Greatly appreciate both the time you gave me yesterday and the response today. As a reference point for detailed info and opinions on this subject.

Will be in touch soon.
 
  
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RXP.
Monza


Joined: 24 Oct 2017
Posts: 183



PostPosted: Tue Jan 08, 2019 10:21 am    Post subject: Re: Flywheel Reply with quote

rocco996 wrote:
RPM fitted mine 15k ago, had a standard clutch fitted as I was a bit worried about commuting with an on/off clutch, I love the chatter from the engine and the way it revs, and I have had no problems with it. Would I do it again, yes.


Hey bud,

was this part of a rebuild on the csr programme? balancing the flywheel to the crank?

Or straight bolt on?

I believe rpm use the TTV flywheel?
 
  
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rocco996
Monza


Joined: 15 Jun 2010
Posts: 205
Location: South Wales


PostPosted: Tue Jan 08, 2019 7:01 pm    Post subject: Reply with quote

Bolt on, the only 'engine' work was the LWF and clutch, there was certainly no charge for balancing and I wasn't told it was required. I don't know what make they used, I'm sure they will tell you if you ask them.
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997 CSR, Atlas Grey.
 
  
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crash7
Montreal


Joined: 28 May 2011
Posts: 572



PostPosted: Tue Jan 08, 2019 9:41 pm    Post subject: Reply with quote

996ttalot wrote:
RXP. wrote:
So, I spoke with Ken today.

Lovely chap. Long story short, if would happily fit a lwfw for me. However if it were him he would not fit one on a 7.1 c2s.

So that leaves me with:

PARR Motorsport yes
RPM yes
Ne no
Demort no.

and forum members pretty even split too.


I just wouldn't personally do it on NA 996/997 engines - GT3 etc is fine. The only time we have on those particular models is when building some track day engines and then the whole assembly was balanced.

Ken



Hi Ken,

You have previously fitted a LWFW to an M96 and this was as a bolt on, so no dynamic balance to the crank, why then? and why the change of heart?

http://www.911uk.com/viewtopic.php?t=121423&postdays=0&postorder=asc&start=0
 
  
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996ttalot
Approved Trader


Joined: 21 Sep 2009
Posts: 1442
Location: Horley Gatwick


PostPosted: Tue Jan 08, 2019 10:45 pm    Post subject: Reply with quote

crash7 wrote:
996ttalot wrote:
RXP. wrote:
So, I spoke with Ken today.

Lovely chap. Long story short, if would happily fit a lwfw for me. However if it were him he would not fit one on a 7.1 c2s.

So that leaves me with:

PARR Motorsport yes
RPM yes
Ne no
Demort no.

and forum members pretty even split too.


I just wouldn't personally do it on NA 996/997 engines - GT3 etc is fine. The only time we have on those particular models is when building some track day engines and then the whole assembly was balanced.

Ken



Hi Ken,

You have previously fitted a LWFW to an M96 and this was as a bolt on, so no dynamic balance to the crank, why then? and why the change of heart?

http://www.911uk.com/viewtopic.php?t=121423&postdays=0&postorder=asc&start=0


We do lots of projects all the time (which I really should get around to posting about) and a project with LWFW turned up some interesting results of not picking up maximum power above 6000rpm. We traced that to the LWFW, replaced with DMF, and problems went away.


When I say problems, remember we are refering to making the cars performance the best it can be and on NA cars that is always tough work to extract power.


We do fit LWFW to certain variants, which don't exhibit the above issue. The only way you would see that issue is live datalogging, which when we are tuning we do.

Just because you fit something to a car that does not exhibit any outward signs of issues, does not mean necessarily that it is performing at its best.


Add this to the fact that a lot of our project cars spend extensive time on track, and that the m96/m97 is lets say weaker than some of the other variants, imo you just up the risk. And to go back to the issue we found, remember that on track, you are generally in the power band for a lot of the time up in the higher RPM.


LWFW are a great upgrade, Porsche fit them to some variants and Porsche also in the past have advised against as well in some cases. I'm just not convinced that all LWFW are a great upgrade.


I have removed the LWFW and put back in a DMF in the project car you provided a link to as an FYI. Ryan only uses that car to and from track and is an exceptional driver on track and uses every ounce of power he can extract from the m96 engine. It was a shame to lose the LWFW from the car, but we have a better product now.


Ken
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