the flywheel test (switched to 2 kg / 4.4 lbs lighter flywheel)

[Frank Lee]

If it's good for +15% why don't they come that way? Twood be such a simple thing...

[comptiger5000]

It's only good for that much in the right kind of driving. Plus, people like smooth engines, which means heavy flywheels. Plus, it's harder to stall a stick with a heavy flywheel, and most people don't drive stick very well.

[Frank Lee]

Is that it?

[Fr3AkAzOiD]

I do a lot of P&G and when I do drive steady it's usualy at 45 - 50 mph.
Would be interested if there is room for improvement.

[stovie]

I wonder what would happen if u drilled the flywheel like they do rotors??? any1 know how light the flywheels get for I6 4.0L engines??

[comptiger5000]

I'm not sure how light those come. With an auto tranny, it won't make as much of a difference, however, as most of the weight is in the torque converter. Keep in mind, being a long-ish stroke I6, the 4.0 has a lot of internal rotating mass, and probably doesn't have a super-heavy flywheel anyway.

[sc2dave]

anyone ever do a toyota 22r flywheel?

[taco]

Originally Posted by sc2dave

anyone ever do a toyota 22r flywheel?

No but I did a 3rz stock was 28 lbs I went with a Fidenza 11lbs.
It was a lot easier to stall. But I gained about 4 mpg. With no real driving change. To me it made the truck faster smoothed out power and when driven easy gave better mpg. But offroad u has to use 4 lo. It would stall to easy at low speed. And took practice at pulling out.

Was in my 98 4x4 Tacoma manual hubs 5 speed

[kamesama980]

Originally Posted by sc2dave

anyone ever do a toyota 22r flywheel?

That's what my truck has and why I was wondering. I considered it when I was doing my clutch this summer but didn't have the spare $250-300 or time to wait for the 11 lb fidanza I wanted. one of those clutch slipping in all gears and towing 5k lbs next week situations. It takes FOREVER to rev with no load and I can take my time shifting and still hit the next gear before the revs drop that far.

[Fr3AkAzOiD]

Any updates?
Anyone else have any info on the subject?

Your avg from 6 tanks before vs 6 after first post shows only a 1 mpg improvement, well within normal fluctuation.