lightweight flywheel options / opinions for a 84-86 3.2?

[targa florio]

any experience with a lightweight flywheel in a early (915) 3.2 carrera? Patrick makes one ... apparently Fidanza does not (they make one for an SC)...are there otherss? wondering why this is never discussed? is there some drawback thats peculiar to the 915 carrera?

[silverlock]

Curious: what makes you think there’s an issue?

There’s the Patrick Motorsports LW flywheel (which I have), and both FVD + AASCO offer options, although the AASCO site doesn’t provide weight specs. It’s just not a particularly large market to justify new offerings.

I’ve been running the PM one on my 3.2SS build for the last 7k miles. Spins up fast, and with a SW chip, zero stalling/driveability issues. Was expecting a little more throttle blipping in stop-start but suffering NYC traffic hasn’t been any worse.

[targa florio]

Does anyone have experience with a lightened flywheel in a Track car? do you get anything meaningful out of it beyond the Aluminum Pressure plate?
I don't recall hearing anyone mention it in the 25plus years of running my 84... you have to dig really deep here to find anything on it....and since fidanza doesnt have one (and they have one for everything else) ,makes me wonder if theres actual value in it, or some problem in that application The patrick unit is 2.75 lb lighter than stock which isnt really all that much, and its $700
Maybe I should ask to have this moved over to the racing / track side

[TimT]

The flywheel isn't really the issue... its fairly light on its own.. You can have any decent machine shop scallop the flywheel, and zero balance it for a few Benjamins..



Try and source a lightweight pressure plate..RSR or aftermarket..

Or depending on the use of the car you can go all in with a low MOI Tilton and aluminum disc..

[Bill Verburg]

The difference between the heaviest and lightest 911 fly wheel is minimal, unlike the 964 up where they use a dual mass f/w that can weigh close to 50# and a l/w version more like 15#

the clutches have more weight variation, an Al Sachs sport is a very nice piece

The racing clutch's I've used are more of an on/off switch, no fun in traffic on the street.

[targa florio]

Thanks, That's helpful information. I do already have the sachs aluminum pressure plate. So I'm already mostly there. Is there any specific pattern on scallops that Tim mentioned that are preferred? On the two that I've seen there are lightening cuts taken out, they use different styles but achieve the same results. Guess I'll start looking for a donor flywheel to have that done on!

[stownsen914]

For the scallops, look up RSR flywheel. It's a common mod, and there are lots of off the shelf options. You might spend just as much having it done at a machine shop.