nissan720 Posted September 2, 2017 Report Share Posted September 2, 2017 i just finished my engine swap ka24e.I used the LB20 distributor .Where can i get a distributor vacuum?Will one from a 210 matchbox dizzy work? If so what year? 1 Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 Normally, vacuum is ported from the carb base. Are you asking for the vacuum advance unit on the side of the distributor? The little round can? 2 Quote Link to comment
nissan720 Posted September 2, 2017 Author Report Share Posted September 2, 2017 yes sir,the round can on the side of the dizzy. 1 Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 Every one was different at what vacuum they started to advance and their total advance. Even the same engine on different models. Generally no load needs more advance, heavy load (full throttle acceleration) needs none. I don't know what a 2.4 liter KA engine would run best at, at part throttle as that was designed into the EFI system. At this point anything that fits is probably better than nothing. The 210 distributor is almost identical to the L series EI distributor but for the drive gear on the bottom. The vacuum advance unit is likely a perfect swap but what the specs are for it and what the KA would respond to best are unknown. So what's wrong with the one on the L20B distributor? Do you have a points distributor or an EI distributor. Do you have the part number? 22100-????? and I can look it up and give you the advance unit part number for it 2 Quote Link to comment
nissan720 Posted September 2, 2017 Author Report Share Posted September 2, 2017 my dizzy has the electronic module.d4k8 thats what i can make out. Has numbers 22100. 1 Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 There are 5 more letters and numbers after the 2100-????? If it has the small black box on the side it can only be from a '79 or '80 engine. 2 Quote Link to comment
nissan720 Posted September 2, 2017 Author Report Share Posted September 2, 2017 it came out of a 1979 datsun with lb20. 1 Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 That's an L20B engine. The original L20 was a six cylinder. When the 2 liter four cylinder came about they put a B after to distinguish between them. The distributor should look like this... So is your vacuum unit leaking? Quote Link to comment
nissan720 Posted September 2, 2017 Author Report Share Posted September 2, 2017 yeah thats what mine looks like.And yes mine willl not hold. Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 Well I guess you tried the obvious? Check the rubber hose for cracks? Quote Link to comment
nissan720 Posted September 2, 2017 Author Report Share Posted September 2, 2017 that was the first thing.I guess any 40 year old part may be worn just a little! Quote Link to comment
datzenmike Posted September 2, 2017 Report Share Posted September 2, 2017 Well any L20B vacuum advance can should fit it than. The A series may as well. Quote Link to comment
distributorguy Posted September 5, 2017 Report Share Posted September 5, 2017 If the part of the vac unit that fits into the distributor is completely round, the dealer should have part #22301-P7901. Under $30. If its flat on one side, they are NLA. Quote Link to comment
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