Jester Posted October 26, 2011 Report Share Posted October 26, 2011 I have been holding on to this dang L20B flywheel for quite a while. It was in the back of one of my old parts trucks. Forgot how damn heavy it was. A couple weeks ago I picked up a Z22S with the flywheel. Didn't even think about the weight. Now last night I'm over at NKL DYM's and he offers we a freshly rebuilt L20B for my wagon. Mentioned I would just need the flywheel for L20. NO PROBLEM, I HAVE ONE. I dig out this old rusty L flywheel AND I grab the Z flywheel. HOLY CRAP.....WHAT A DIFFERENCE IN WEIGHT!!!! Check this out. Now the L20 has three alignment pins in it And the Z22 only has a place for two. One is gone and the other is broken off. I am thinking of using the Z22 flywheel behind the L20 with the Z22 truck clutch. Any one see a reason this wouldn't work after I have it balanced? Quote Link to comment
Farmer Joe Posted October 26, 2011 Report Share Posted October 26, 2011 shouldnt be a problem at all. i have a 84 z24 flywheel on my 77 l20b. i went right to the z24 flywheel from an auto trans, so i dont know if theres any difference for the driveablility. other than that, i think you should be able to use the 240 mm nissan clutch now. use the clutch and PP from the truck the flywheel came from.. good luck man! Quote Link to comment
Jester Posted October 26, 2011 Author Report Share Posted October 26, 2011 I'll have to put them on the scale and see how much they weight in at. The difference is pretty crazy. Quote Link to comment
wayno Posted October 26, 2011 Report Share Posted October 26, 2011 I also am using the Z24(240mm) flywheel behind my LZ23, never checked to see if there was a differance, giant clutch disc, thats all I cared about. Quote Link to comment
Jester Posted October 26, 2011 Author Report Share Posted October 26, 2011 Cool. Sounds like I may see if that free 5 speed works or not while I'm at it. lol Quote Link to comment
Sealik Posted October 26, 2011 Report Share Posted October 26, 2011 I'll have to put them on the scale and see how much they weight in at. The difference is pretty crazy. 21 lbs Post 195+ http://community.ratsun.net/topic/25497-sealiks-shit/page__st__180 :D Quote Link to comment
datzenmike Posted October 26, 2011 Report Share Posted October 26, 2011 Yup the ones with the scalloped back are about 21 lbs and 29 for the other. I had a 225mm from a 280zx and the extra weight isn't needed because the crank is longer with more mass. The Z24 one is also lighter. Quote Link to comment
Jester Posted October 26, 2011 Author Report Share Posted October 26, 2011 Thanks for the link. I have a lot of reading to do now. :D Quote Link to comment
Yrag Posted November 18, 2011 Report Share Posted November 18, 2011 I have been holding on to this dang L20B flywheel for quite a while. It was in the back of one of my old parts trucks. Forgot how damn heavy it was. A couple weeks ago I picked up a Z22S with the flywheel. Didn't even think about the weight. Now last night I'm over at NKL DYM's and he offers we a freshly rebuilt L20B for my wagon. Mentioned I would just need the flywheel for L20. NO PROBLEM, I HAVE ONE. I dig out this old rusty L flywheel AND I grab the Z flywheel. HOLY CRAP.....WHAT A DIFFERENCE IN WEIGHT!!!! Check this out. Now the L20 has three alignment pins in it And the Z22 only has a place for two. One is gone and the other is broken off. I am thinking of using the Z22 flywheel behind the L20 with the Z22 truck clutch. Any one see a reason this wouldn't work after I have it balanced? Quote Link to comment
Yrag Posted November 18, 2011 Report Share Posted November 18, 2011 If all specs measure the same you should be fine. I machined down a L20 flywheel to less than half its weight once. It was for a circle track car running alcohol. It alows the engine to rev up much faster but you will loose torque. Quote Link to comment
datzenmike Posted November 18, 2011 Report Share Posted November 18, 2011 If the engine side is scalloped like this it weighs about 21pounds. If it's flat across the back it's about 29 pounds. A heavy vehicle like a truck with a small L20B motor would likely have the heavier 29 pound one for storing rotating energy for take offs. Cars specially with 6 cylinders or larger Z22/24 motors might have the lighter ones. It will work perfectly. If you were using the truck for hauling heavy loads you might notice having to rev and slip the clutch a bit more. What size clutch? 225? Quote Link to comment
Jester Posted November 18, 2011 Author Report Share Posted November 18, 2011 This would be going into my wagon. Looks like 9 1/1" across the face. Quote Link to comment
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