cb944

yeah.. that was my next question - there doesn't appear to be anything wrong with my clutch, is it a case of getting to the flywheel means you might as well do the clutch as well, or is it easier to just replace the flywheel?

I agree with the points on getting a 951, I nearly bought one a couple of months ago, but I've had my 944 for maybe 5 years, I've done a lot of work on it and I'm unlikely to see any return on that money either, so it's rather more about just improving it because I want to rather than for any other reason.

The is a point though where you have to wonder where to stop...

Mike C.

Yes you do have to remove the tranny, torque tube, bell housing and clutch to get to the flywheel. Alternatively, you can take the engine out (which is normally done from under the car). I would guess the insurance (assurance) would be pricier on a 951 too.

Mike C.

My bad. You don't have to remove the torque tube, just slide it back a few inches for clearance to remove the bell housing.

kombatrok

The web cams site has #274 at $574... where did you find it for 150?

944Ross

Lighter flywheel doesn't add any HP, see the other NA HP thread for full discussion.

cb944

You're quite correct; sorry for the confusion! I read up on it a while ago and completely forgot the reason why I was thinking of getting one. I assumed the lower weight would remove some drivetrain losses but I guess in practice, a few lbs on the flywheel is hardly going to do much in that department.

Still, it's on my list of things I want if I start these engine mods... starting to realise though that I'm veering off topic!

Cone_eater

power to weight is more important than sheer power.
In autox / time attack wonder why you hardly ever see 500hp mustangs but tons of miatas...
its about handling. sway bars, koni yellows, short throw shift, and tires. Thats gonna make a quick time. no room in the track to use excessive power.
just my 2 cents.

Kerry Chadderton

M758 mentioned "adjusting" or "tuning" the AFM. What did you mean by that? Is that ugly box adjustable? Is there a link to a procedure? Also, this AFM/DME swap or update; Is this mod allowed with NASA? Do you recommend it?

ConeEater, you mention "a 75 shot, bigger injectors" on your Sig. How did that work out for you? Sounds like that could be fun!

I'll look at the $ per HP on this stuff and check the SCCA rule book. It looks like the fundamentals are in order; breathing, tune and weight. I was hoping there might be a free 5 hp somewhere! LOL

My 2 cents on the flywheel: Don't bother unless you are going all out on the rest of the engine. The stock wheel is not heavy to begin with. The weight is in the pressure plate. Some engines have 20 lb. stock flywheels and a lightweight is worth it. Not on the 944!

roman944

not sure about your area, but in our local SCCA chapter - there are a couple of supercharged Cobras, supercharged M3, Z06 Corvette ... and they are some of the fastest cars ...

oh, just saying, not wanting to start anything ... its all about the driver

cb944

I'm pretty sure the stock 944 flywheel does weigh nearly 20lbs.. I think it's something like 17lbs.

Compare that to a Fidanza flywheel - 6lbs. There's a few threads on here with people who have them and recommend them.

Cone_eater

roman: I guess in my area we only have very tight tracks. Basically i get to watch vettes spin out all day and talk about how much power they have. While the RX7 and miatas set the fast times, lol

You are 100% right. its the driver, not the car. In my opinion thats one of the best parts of autox, you dont have to own a fortune 500 company to collect a trophy.

Kerry Chadderton: The 75 Shot was never sprayed. Car was stolen 2 days after I finally got it running. I drove it for about a half mile. Sucks. But I am sure it would have been a blast.

Cone_eater

I dont know the exact weight but the factory ones are a freakin ton. The lighter flywheel would help in motorsports, but not much help when trying to pull a hill in daily driving. Plus its a minor surgery to change. (as we all know that whole process)

ritzblitz

Used on this forum.

roman944

honestly our SCCA chapter LOVES to put in very tight turn arounds and turns, this is around a parking lot ... but these cars still seem to be FLYING through it ... hehe

M758

Correct. Zero hp gain. However it can allow a car to accelerate slightly faster due to less interia to spin up. That is roating mass. It gives you more of a gain the lower gears than the higher gears. I have run some calucations years ago n the effect. Weight wise a 10lbs lighter flywheel is worth about 60lbs car weight accelerating in 2nd gear. That drops to about 10lbs 5th gear due to generall slower rate of acceleration.