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The don't 'gain kw' at all.

What they do is massively reduce inertia, allowing for faster accelleration.

Accellerating faster without extra power is GOLD.

NO extra wear

NO extra heat

NO loss of economy

NO spending money on upgrading parts to cope with more power.

The carbon tail shafts are very strong too.

There is a guy Keith Cowie who I think made mention of getting them made up fairly cheaply for his R32GTR, if your around Keith please feel free to drop the name of the place :D

Considering the dollars people end up spending on modifications to acheive the same accelleration advantage they may well be reasonably priced considering the ongoing savings you get on the advantages listed above.

Keith was apparently getting much keener prices than nismo and mines stuff.

ok, i saw a mention of one on a top secret car, but it seems they may have been using the trust one. it's around 350 000yen for a 32 GTR. not sure if they make GTST versions.

pic:

post-3621-1133928866.jpg

arent you just reducing rotating mass with these things ?

you would get the same effect with

-lighter wheels

-lightened flywheel

reducing rotating mass too much has drivability downsides though, car will be jerky and lose momentum very quickly - i think you would be able to cross that line (between being driveable on the street and not being driveable, or desirable) with just lowering of your flywheels mass

Edited by mokompri

It's not the same as lightening the flywheel. The flywheel gives the engine end of the drive train additional momentum, which assists with maintaining revs (helps you to not stall) when you let the clutch out. This improves driveability. There are some other benefits during gear changes.

A lighter driveshaft (or lighter wheels) will not have this effect on driveablility, as they are on the other side of the clutch. There is no downside - beside the cost. :rolleyes:

in relation to GTR's ive heard they make a noticeable difference in acceleration. Id have to feel it for myself tho before i go spending $4000+ on one! the stock one is ~15kg and the carbon one is half that. So i would agree, not exactly a bang for buck mod! Unless however you are at the stage where youve already exausted the most power-liberating bang for buck mods and want to go the next step. And if all your doing is eating XR8's, i highly doubt that is the case with your GTS xr8eater :rolleyes:

edit: the gtr ones im talking about are the trust ones as already mentioned, available from greenline, however they dont seem to have them listed for GTS.

Edited by SLY33
It's not the same as lightening the flywheel.  The flywheel gives the engine end of the drive train additional momentum, which assists with maintaining revs (helps you to not stall) when you let the clutch out.  This improves driveability.  There are some other benefits during gear changes. 

A lighter driveshaft (or lighter wheels) will not have this effect on driveablility, as they are on the other side of the clutch.  There is no downside - beside the cost.  :rolleyes:

ahh yes of course you are right ! while engaged in gear though the effect would be the same, but yeah the tailshaft wouldnt have the downsides of a lightened flywheel on gear change

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