Flywheel weight

My B's a 66 .... how much does the stock flywheel weigh, and for a street car, what's a minimum it should weigh after machining? It's getting a new clutch.

If you really want to improve off the line, and WOT acceleration get either a Fidanza Lightened Flywheel or Lighten yours. I wish I could remember the weights, I have them written down somewhere.

There's NOTHING like driving a car after installing a lightened flywheel. Night and Day!

Sorry I didn;t have the specific weights, but Hap would know. I bought my Fidanza from him.

B

Different years are different weights. The early 3 mains are about 18 pounds and the 5 mains are lighter. An aluminum one is about 8.5 points. If you can lighten a stock flywheel to under 15 pounds, you're good. I've seen Kent Prather get one down to 12.5 but the amount of machining time makes that cost prohibitive. And if you really want the big daddy flywheel, look at this 8 pound, all steel beauty :)

Somebody recently said if the flywheel's too light, off the line acceleration suffers.

now that is a great lookin' flywheel Basil

more flywheel porn ;)



Love the light flywheel on the B

Just had a lighter one put on my audi TT. Huge difference!

Paul, If I had a flywheel that looked like that 3-holed thing, I'd want it to show :)

I've never weighed a 3-main flywheel, but my 5-main one was either 22# or 24# before I had it lightened (boy my memory is getting bad)

I can trust any shop, NAPA or Carquest with machine shops for example as my locals do, with knowing what they're doing with my flywheel particularly if I'm asking them to lighten it? Anything car specific?

So, how good is a Fidanza flywheel? Is it a good thing for an MGB.? MIne's a 1966 that will be driven well. Do you need to do anything to the engine when you switch to an aluminum flywheel?

I just put 5 5-main flywheels on the scale last week, and they were between 21# 2oz and 21# 10 oz. The earlier ones I know are heavier. I've got a few around, I'll put them on the scale and post later today.

I had a local machine shop lighten my 5-main from 21# down to 16#, I havent driven on it yet, but I was impressed by the amount of material removed.

I used to use a 3 main flywheel that weighed only 16 lbs. stock. Well, stock for a TVR as an SCCA homologated option and it was aluminum..... :smoking:

Don't go crazy machining flywheels unless you really know what you are doing. I still have a friend that can only walk with a cane, because a flywheel almost took one leg off at the ankle.

The early flywheels I have here, I believe are all for 3-main engines (don't have one for the 65-67 cars) weigh in at over 28# each. From just over, to almost 29#.

I don't know the exact weight, but heavy enough to break your toe if you drop it on your foot.

Don't ask how I know this.