preferred flywheel

[sliding_creep]

simple questions: 74' 610 L20B, affixing an 81' 280zx(NA) 5-speed and flywheel which has a 240mm contact surface.

 

1) which would be more desireable for my purposes, 240mm or look for a 225mm?

 

2) and what size clutch kit (diameter) should i use?

(as my parts suppliers have only the two sizes of 8" dia. and 9" dia. and look at me crosseyed for mentioning metric anything.)

 

cheers

[datzenmike]

It appears that only the '76-'78 2+2 and the '82 and up turbo had the 240mm flywheel. But over the years lots of stuff could have been swapped I guess.

 

You have little choice. The size of the 280zx 240mm flywheel determines the clutch and pp used on it. If you want to go with the smaller 225mm you will have to find a truck L20B flywheel or any 240/260 or any other 280z, 810 or 810/Maxima flywheel. BTW the 720 4X4s and all Z24 720s used 240mm clutch and flywheel combos.

 

8" is 203.2mm or most likely 200mm used on Roadsters and all L and Z series 4cyl cars till '82.

 

9" is 228.6mm or probably 225mm used on all L20B truck motors, 2wd Z series truck, 810 and 810/Maxima and most Z cars.

Edited February 15, 2009 by datzenmike

[HRH]

Don't forget, not that you'd probably use it, but a Z20s flywheel has a unique pressure plate mounting. And a Z24 flywheel can only be used with a Z24 crank. It'll vibrate like an sob on the other cranks.

Edited February 15, 2009 by HRH

[datzenmike]

 

8" is 203.2mm or most likely 200mm used on Roadsters and all L and Z series 4cyl cars till '82.

 

 

I had a Z20E flywheel and it was a 200mm and I didn't see much difference between it and a 225/240mm except the width.

[sliding_creep]

EXCELLENT! thanks for the quick replies and good info!

now the whole setup came out of a complete 81' 280zx, probably a late 81' or an early 82' (would explain the flywheel) and all the parts looked kosher when i yanked 'em, which would indicate to me that if that car didn't have a problem running it then mine should be okay to run too. that is priovided i ask the fv(k-tard supplier for a truck or a zx-turbo clutch kit.

 

i suppose if anyone knows of or had a bad experience with this setup i believe i can get a re-man flywheel (contact dia. of my choosing) for cost and core thru a friend's supplier for 45 clams. i will await further prompting from smart people, b'fore i eff sumthin' up! thanks again for all the help!

 

cheers

[djlotus]

This makes me think of the White Bunny setup. Try a search for White Bunny Special and see if it helps you out.

[sliding_creep]

This makes me think of the White Bunny setup. Try a search for White Bunny Special and see if it helps you out.

 

wierd, i can't get anything pertaining to flywheel selection. just some really nice stories and or pics of sweet snowy pickups and or brilliant 4dr 510's. thanks though!

 

cheers

[datzenmike]

And a Z24 flywheel can only be used with a Z24 crank. It'll vibrate like an sob on the other cranks.

 

Matt I haven't heard this. The L and Z cranks are balanced and the flywheels will swap. I have an L20B 225mm on my Z24 and works fine.

[sliding_creep]

i'll take DATZENMIKE's response as a confirmation and just run the 240! i'm off to the races!

 

cheers

[datzenmike]

Some makers like GM? balance the motor by using the flywheel and so the crank AND flywheel must stay together. Some use the crank pulley. I believe that Datsun balances the crank thus all L and Z flywheels will swap.

 

If the flywheel were the true balance then the mounting bolts would be staggered so that it could only be bolted on it one position.

Edited February 15, 2009 by datzenmike

[djlotus]

wierd, i can't get anything pertaining to flywheel selection. just some really nice stories and or pics of sweet snowy pickups and or brilliant 4dr 510's. thanks though!

 

cheers

 

I meant a google search, my b, it's a clutch/flywheel setup that 240 guys run on their ka's. Takes them from a 225mm setup to a 240mm setup using zx parts.

[datzenmike]

DJ I take it the KA uses a 225mm clutch/flywheel then? I've seen the crank and know it's 6 bolt and looks like the L and Z pattern. The Z tranny will fit on a KA so the flywheel/starter is similar.

 

Does the ZX flywheel swap on without mods????

[djlotus]

There's really no modification to get the 240mm clutch on the ka. Just collect the correct parts and call it a day.

 

http://240sxdrifter.tripod.com/writeups/whitebunny.html

[sliding_creep]

There's really no modification to get the 240mm clutch on the ka. Just collect the correct parts and call it a day.

 

http://240sxdrifter.tripod.com/writeups/whitebunny.html

 

whoops! tee hee! thanks for the link, cool write up. no sense in wasting time getting a different flywheel since i have a perfectly good one to use:D!

 

although i am curious about being able to hook up that KA-DE to this trans??? might not want to swap to a CA-18DET, just go KA! thanks again!

 

cheers

[datzenmike]

Your zx tranny would need a pre '83 Z series front case half swapped onto it in order to properly fit the KA motor. The later Z series front case can be used but needs more mods.

Edited February 16, 2009 by datzenmike

[hang_510]

Matt I haven't heard this. The L and Z cranks are balanced and the flywheels will swap. I have an L20B 200mm on my LZ24 and works fine.

 

= my set up

[sliding_creep]

DONE and DONE! runs friggin' great w the Z 2+2 5 speed and the 240mm flywheel! THE EASIEST auto to manual swap ever! i gotta find another cheap automatic car and swap it out. my local boneyard is fulla them 280 5-speeds! thanks again for all the help and advice!!!

 

cheers

[zerow]

Right On! I'm happy to hear that the swap went well.

[banzai510(hainz)]

if the 610 L20b has the orginal flywheel wouldnt it be a 200mm set up.

As L20s in cars were 200mm ,The Roadster 200mm pressureplate set up will work on this if you want more clamping

L20s in trucks 225mm(heavey flywheel) setups

[sliding_creep]

stock they s'posedly come 6-bolt 200mm. i dunno, this was an auto car. flex-plate.

 

cheers