sasquatchmystery Posted January 22, 2019 Report Share Posted January 22, 2019 Hi I have a 1980 a14 engine from a 210 and I am in need of just a single pulley instead of the 3 pulley that came on the engine. cheers, morrisluvr@yahoo.com Quote Link to comment
datzenmike Posted January 22, 2019 Report Share Posted January 22, 2019 Here's the place to ask... https://ratsun.net/classifieds/category/9-datsun-parts/ A12 engines had single pulleys. Is this because of rad clearance? Quote Link to comment
sasquatchmystery Posted January 22, 2019 Author Report Share Posted January 22, 2019 I am putting it into a Mg midget and there isn’t room for the three pulleys because of the steering rack. I don’t think it would be a good idea to try and cut it down and machine it down because it won’t be balanced Quote Link to comment
wayno Posted January 22, 2019 Report Share Posted January 22, 2019 How much room you have between the timing chain cover to the steering rack? I am trying to get an idea of the room you have. Quote Link to comment
sasquatchmystery Posted January 22, 2019 Author Report Share Posted January 22, 2019 I do not have the engine in the car yet so I don’t know. A friend of mine has done lots of these conversions and he told me that the triple pulley will not fit and I need the single pulley/balancer. He sent me a photo last night of one he did and the single pulley just clears. Quote Link to comment
wayno Posted January 22, 2019 Report Share Posted January 22, 2019 I have 2 engines with double pulleys on them. Quote Link to comment
sasquatchmystery Posted January 22, 2019 Author Report Share Posted January 22, 2019 Do the double pulleys also have the harmonic balancer as part of them? Quote Link to comment
sasquatchmystery Posted January 22, 2019 Author Report Share Posted January 22, 2019 How much would you want for one of them if they are spares that is. I can show you a photo of what mine looks like if you send me your email I can send a pic. Quote Link to comment
sasquatchmystery Posted January 23, 2019 Author Report Share Posted January 23, 2019 ? Quote Link to comment
wayno Posted January 24, 2019 Report Share Posted January 24, 2019 (edited) Sorry, I do not always come here and look at every thread I have posted in. Here is the dual pulley, I do not know if it is just a set of pulleys or if it is the balancer also, it does not come apart and it is very dirty, I only mentioned it because you said they made a single and triple, but you did not mention a double. I also took a photo with a tape measure over it, that is from the front cover to the front of the pulley. Edited January 24, 2019 by wayno Quote Link to comment
datzenmike Posted January 24, 2019 Report Share Posted January 24, 2019 The A12 engines in the B210 and the 210 are single pulley. I don't think the pulleys have a harmonic balancer but the larger and later Z24s do and the KA engines. many of the L20Bs have solid pulleys. If you have a triple pulley have a look and see if they are solid or have something bolted into the center. If solid have it trimmed to a single. Quote Link to comment
Stoffregen Motorsports Posted January 24, 2019 Report Share Posted January 24, 2019 I don't recall ever seeing a harmonic balancer on an A motor, though I don't remember everything... Here is a pic of my A12 that was in my 320. It has a single groove pulley. I do remember machining them down to a single groove on the lathe, but again, I can't remember if this one was machined or stock. Quote Link to comment
Stoffregen Motorsports Posted January 24, 2019 Report Share Posted January 24, 2019 Oh, and for you BMC guys, that paint on the A12 pictured above is BMC green. Quote Link to comment
K Appley Posted January 25, 2019 Report Share Posted January 25, 2019 S M, the picture you show is the single pulley. I have cut down three now and they are cast and easy to cut and machine. Never fitted with a harmonic balancer and if balance is a concern the best way to address that is to have your entire rotating assembly balanced by your machine shop. Crank, front pulley, and flywheel plus clutch assembly. That is the way they were done at the factory. I don't believe the crank was separately balanced. The front pulley isn't a concern for balance IMO but the crank and flywheel are. The flywheel is particularly heavy and lightening it for better performance isn't a bad idea. Afterwords balancing the assembly would be a good idea. 1 Quote Link to comment
datzenmike Posted January 25, 2019 Report Share Posted January 25, 2019 Can't speak for the A series but Nissan did balance everything separately. Crank, flywheel. Quote Link to comment
K Appley Posted January 25, 2019 Report Share Posted January 25, 2019 Well, Mike I guess I misspoke. I know the flywheel and front pulley have balancing holes drilled in them and assumed they were externally balanced. Never less, balancing everything as a unit would be a good idea in my opinion. 1 Quote Link to comment
datzenmike Posted January 25, 2019 Report Share Posted January 25, 2019 The trouble with balancing the crank with flywheel and pulley on is what do you do if the flywheel needs to be replaced? If everything is balanced separately you can swap parts no problem. Quote Link to comment
Stoffregen Motorsports Posted January 25, 2019 Report Share Posted January 25, 2019 Zero balancing is the term. It's like cooking, you season as you go, so that no one component is lacking in flavor. Nissan has proven to be very good about zero balancing all of their rotating and reciprocating parts. Rods are almost always within a couple of grams, cranks generally are spot on. Quote Link to comment
sasquatchmystery Posted January 27, 2019 Author Report Share Posted January 27, 2019 I have a single pulley I just received today. Thanks for everyone’s input! You guys rock! 1 Quote Link to comment
K Appley Posted January 28, 2019 Report Share Posted January 28, 2019 On 1/25/2019 at 10:06 AM, Stoffregen Motorsports said: Zero balancing is the term. It's like cooking, you season as you go, so that no one component is lacking in flavor. Nissan has proven to be very good about zero balancing all of their rotating and reciprocating parts. Rods are almost always within a couple of grams, cranks generally are spot on. That's good to know since the first A series I put together was a auto trans engine and I fitted a manual trans flywheel. 1 Quote Link to comment
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