Socalman Posted September 9, 2020 Report Share Posted September 9, 2020 Wondering if they are the same? I am in search of an aluminum flywheel for the 521. I have found one for the 510, which specs are l16 with a 4 speed, wondering if anyone can confirm. Thank you 1 Quote Link to comment
datzenmike Posted September 9, 2020 Report Share Posted September 9, 2020 The truck is heavier so I wouldn't run a lightened flywheel on it. OK on a lighter car. Look up why engines have a flywheels. It would be better to get lighter alloy rims and car tires, maybe an aluminum driveshaft.... better but hardly worth it. . Both L16s on the 521 and the 510 are the same other than emissions systems, carburetors and the alternator. The transmissions have nothing to do with what flywheel you put on. But to answer your question the 521 has a bolt on spline on the end of the transmission while the 510 just slides in. 521 510 would look like this 510 F4W63 ratios 1st... 3.382 2nd.. 2.013 3rd.. 1.312 4th...1.000 510 wagon and 521 F4W63 ratios 1st... 3.657 2nd.. 2.177 3rd.. 1.419 4th...1.000 1 Quote Link to comment
Socalman Posted September 9, 2020 Author Report Share Posted September 9, 2020 Thanks fro the reply, you're saying its not a good idea but I can run a 510 flywheel and still use the 521 clutch disk because its the same? and not have to worry about running a 510 disk and figuring out if the input shaft splines will be the same? 1 Quote Link to comment
datzenmike Posted September 9, 2020 Report Share Posted September 9, 2020 The 510 flywheel is identical to the 521 so yes everything will fit. It's fairly safe to say all Datsuns and most Nissan L, Z, CA, SD, LD, KA, VG engines (probably more) use the same input and output splines on the transmissions. 1 Quote Link to comment
Socalman Posted September 9, 2020 Author Report Share Posted September 9, 2020 Thank You, just to clarify something, the 510 weights a little over 2100 pounds from what I read, I know my 521 full of fuel is also just a little over 2100 pound, but then again, I might want to carry something one day once its done. 😁 BTW, I admire your knowledge. 1 Quote Link to comment
datzenmike Posted September 9, 2020 Report Share Posted September 9, 2020 On 1/15/2008 at 7:08 AM, banzai510(hainz) said: with me in it 2560. well thats what its say when I leave the trash dump!!!!!!!! Assuming Hainz weighs 200 lb this would be over 2,300 pounds. Bumpers were usually added once the trucks were unloaded from the ship.... don't know if that weight was included but those bumpers were heavy. My 710 station wagon is 1,300 Kg or 2,860 with me in it (2,660 without me) and would assume a truck would be at least that. My 620 was 2,750 on the engine sticker. I would run it over a scale with yourself in it and 1/2 tank of gas and see... after all this is what the engine has to work with. I'm curious what a 521 ready to drive with all fluids and a driver weighs. Just saying that if truck is much heavier than you think and you run a lightened flywheel you may have to rev and slip the clutch more to get away from a dead stop. To me this get tired real quick. 1 Quote Link to comment
Stoffregen Motorsports Posted September 10, 2020 Report Share Posted September 10, 2020 A lightened stock flywheel is going to be heavier than most aluminum flywheels. I would not be afraid to run a lightened steel flywheel in a truck, assuming you're not using it for truck things anymore. If you are using it for hauling, I would find the heaviest flywheel possible and run that. I think some of the import L16s had a solid back flywheel that is much heavier than the early US market flywheels. Remember, L16s have 5 bolts and all others have 6. 1 Quote Link to comment
Socalman Posted September 12, 2020 Author Report Share Posted September 12, 2020 On 9/9/2020 at 3:03 PM, datzenmike said: I'm curious what a 521 ready to drive with all fluids and a driver weighs. Certified scale numbers 2140# without passengers, 2300# with myself in it. 3/4 tank of fuel. 1 Quote Link to comment
datzenmike Posted September 12, 2020 Report Share Posted September 12, 2020 Good to know for sure. My 710 (with me) weighs 500 pounds more than a 521??? How is this possible? 1 Quote Link to comment
KELMO Posted September 12, 2020 Report Share Posted September 12, 2020 Could be one of those times when size actually maters. Consider the weight of the rear seat and the lift gate on the goon. I know the rear seat on my 510 goon is quite hefty, both seat back and bottom. More glass also? I'm just spit balling here. 1 Quote Link to comment
datzenmike Posted September 12, 2020 Report Share Posted September 12, 2020 Yeah they are metal lined. But only an H-165 vs. the 521's H-190 rear axle. Maybe more metal used in construction of the monocoque body although the 521 uses a frame, it can support a lighter cab and box. 1 Quote Link to comment
KELMO Posted September 12, 2020 Report Share Posted September 12, 2020 I was going to suggest a diet but that may have been considered rude. And well, I can't be throwin' no stones.🤣 1 Quote Link to comment
datzenmike Posted September 12, 2020 Report Share Posted September 12, 2020 I'm a round 200 lb. 1 Quote Link to comment
Socalman Posted September 13, 2020 Author Report Share Posted September 13, 2020 It will be a little lighter still by the time I’m done with it. 1 Quote Link to comment
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