Re: Teaguer Where have you been? Quick Questions? (archive)

Teaguer,
Have heard form you in quite some time.
I would be interested in those speaker "pods".
Also quick question for you, do you know if a 8 pound flywheel like BAV auto sells causes a 325i engine to stall? I have heard that the lightest you can go is 10 pounds.
I am building a 2.9 liter Metric Mechanic baby six with a 524td crank that has been knife edged.

Also will two piece rotors 260 x 22 work, I have heard that on the e21 323i the rotors are 255 in diameter by 22.

Thanks
Joe Gallo
Orange 323 1979

I doubt that running a aluminum 8lb flywheel would cause a m20 to stall once the idle has been bumped up , BMP and BavAuto both offer the 8lb flywheel for the m20 and even for the m10 they list the same 8lb weight, so I doubt that it will cause the engine to stall constantly .
I've also read where MM says not to go below 10lbs , but I think they are refering to lightening a stock steel flywheel .
That being said , a 8lb unit will be more likely to stall than the heavier 10lb piece .
Once you run a lighter flywheel you will get used to coming of the throttle more gently as opposed to just lifting completely off when you come to a stoplight .
At first it always seems like the engine is about to stall , but you will learn to adjust your driving style a bit .

That 2.9 will really rev quickly with the light flywheel and that knife edged krank .
Sounds like it will be a killer engine .

All E21 rotors have the same diameter of 255mm and the vented versions are 22m wide .
I am inclined to believe that a 260mm rotor will work as it is only 2.5mm wider at the caliper .
If you have the 2.5mm to spare between the caliper and the rotor then it will work .
And like Robert pointed out below , if you are going with the 4 piston Volvo Girling calipers it will actually work better as the Volvo calipers usually need to be brought about 5mm closer to the rotor .
This might not be necessary with the 260mm dia rotors .
Or if you keep the original calipers you could always move that caliper out if it needs to clearenced from the bigger rotor .
People do it to the Volvo calipers to bring them closer so you can do the same to get the stock calipers further out .

Keep in mind that the 2-piece rotors will have to keep the same backspacing as the stock rotors , in other words the rotor will have to be in the same plane as the current stock one is .
If it doesnt line up where the stock does you will have to space the caliper in or out , and thats getting to be more trouble than its worth .

Hope I shed a little light on a few areas for you .

later ,

Teaguer

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