sharkster

There were also issues of MK1 pulleys coming off with the dual mass never mind the single mass But for the mk2 it's the same pulley for both.

TRAKCAR

My crankshaft? bolt backed out on my MK1 GT3. I bought it that way and it was one of the first 997GT3's and one of the first to get the LWFW installed in a GT3..

IMHO it is a must have upgrade to any GT3, along with a LSD and bypass exhaust.. Makes it a different car.

TTurbine

What about the 997.1 Gt2 ?

sin911

I call it typical corporate bull****. This issue has been discussed numerous times and both the regular gt3 and rs has been around long enough for the engines to be taken apart if someone from Sharkwerks say they share the exact same parts, I will not doubt their word.

pete95zhn

A question about that lightweight pulley in 996 GT2/3/turbo engine....is it required, or just recommended? I have the 964RS LWFW.

( I read the pulley thread, but quite fast, and did not find definitive answer. )

sharkster

Yup aint that the truth! Just as I was saying earlier even folks with dual-mass flywheels had this happen and it's because of human/robot error. I mean do we really think that every time it was torqued properly just like the center locks which come from the factory all over the place!?

Glad you like the exhaust tho:P

You can use the lighter weight pulley from EVOMS but I'll check the next time a GT2RS is in here because I don't recall it being any different to the one on the regular GT2.

In 15 gt3/gt3rs engines we've yet to see anything different heh:P

For the 996gt3 set up we did in fact use the 2010rs pulley or the EVOMS light weight one. It wasn't required but certainly produced about 4-5hp difference on a dyno.

911SLOW

The engine gained power from the pulley?

Lost you a bit there mate.

sharkster

Oh sorry I should explain that pulley and belt are actually considerably lighter than on the 996gt3. The weight of the evoms one is 220g vs 500g for the stock 996GT3 one. The throttle response is a little better with it vs the stock one is all and on the dyno you can see a small increase (not that it's worth it for that). The nice thing about that pulley (weight aside) is contact patch is about 60% larger (distributes the load more) too so once torqued down it's not going to come off

911SLOW

Thanks Alex.

I have the 6RS pulley which is considerably lighter than the stock one; 195grams less.
And, as expected, no absolute power gains whatsoever, you can't even see an increase with the old cup super light flywheel of the 10RS.

What you describe can perhaps be explained by watching the power curve on the graph from a rolling dyno. There might be a chance to see a shifting in some "peak points" in the lower rpms, coming from the quicker pick up of the engine. ?


Btw a lighter belt is nice, is it a Porsche part?

sharkster

That's exactly it.. it's hard to extrapolate dyno HP vs real-world acceleration if you will I remember the 6RS pulley as well that's right!

Yorkshireman

So, once the engine is gear and rolling, or on a chassis dyno, then there are a lot of rotating parts in play. Assuming no clutch slip and no wheelspin, then as well as spinning a flywheel you have drive shafts, brake disks, wheels and tires. So, with all that in mind I would have thought that ceramic discs being, what, say, 15 lbs lighter in the rear would have just as much of an effect as the flywheel. Lighter wheels and light tires would also have an effect.

So, my non RS GT3 with ceramics should rev as fast and cleanly as an RS with steeleys once we are actually under way and moving?

Just my two pence.

The Greek

In theory, your thought does make sense.

In my mind, and I may be wrong, I think the location of the added weight is a factor. 15 lbs of lightened weight connected to engine components would have a greater rotational effect than the lightened rotors.

Watch some MIT guy come on here and just rip me now....

cfjan

Alex,

So you guys use the EVOMS pulley before? Worth the extra money vs. say the stock 7.2 pulley? (for a 6GT3) EVOMS pulley is the lightest for sure..

sharkster

Roger that on the 6s we have done but now that the 7 .2RS is available you can always use that. I like the design of the EVOMS one as it prevents it from ever sheering and coming off

Larry Cable

So do you need to reflash the ECU for LWFW or is its presence simply detected via the existing sensors (as I recall) ???

I recall the LWFW in the original 996.1 CS was pretty amazing how quickly the enginer revved etc ...

well worth the upgrade if you have your tx out as well as a cup or guard rebuilt LSD ...