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03-20-2007, 03:48 AM
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the reason why i had to change so much is because i wanted to use the SOHC computer rather than the DOHC computer. This was because it just looked too hard to integrate the DOHC computer into the SOHC car.. not only that, i couldnt find a DOHC loom either. i also had to use a modified version of the DOHC power steering pump because the mounting was different including the A/C compressor, and all the pullies. The power steering fittings are different between the SOHC and the DOHC as well.
The DOHC box actually uses a different trans computer than the SOHC so in order for the SOHC Engine computer to work i needed to use the SOHC trans computer as well. and dont think about using your SOHC air con compressor either, it doesnt mout up to the DOHC engine, if you try to change the A/C mounts then you have to change the pullies and the resto of the ****. i found out the hard way. having said that though the DOHC has things the SOHC doesnt.. knock sensors, better dizzy, twin cams and sequential injection. also in the end i ditched the Auto and bolted up a manual trans too it.. as far as i know i was the first ever to do this..
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- Mazda HC 1989 929 - 3L DOHC 5 Speed, Coilovers, 18 inch Rays Engineering Gram Evo 4s, Torsen LSD < Getting 1JZ-GTE love soon - Datsun 1600, 110rwkw Hot L20B, 75 Wade cam, ported, polished, balanced, bigger valves, close ratio 5 speed, 4.11 locker. 13.8 sec 1/4 mile - Mazda HC 1990 929 V6 JFT Turbo conversion, Torsen LSD, Tein HR Coilovers, 17 inch Racing Harts, Front mount intercooler. 
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06-08-2007, 02:55 AM
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sup g.just had a quick look thru ur conversion.Lucky i got my 3.0 doch wit da ecu n loom.did everyfng just basicly bolt straght up?Well ill soon find out when my loco low luce z on tz way to life.
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12-29-2007, 05:13 AM
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also it is worth mentioning that the Jap spec and the Aus spec alternators are different. the jap spec one is a 70A unit and the Jap unit is 80A.
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- Mazda HC 1989 929 - 3L DOHC 5 Speed, Coilovers, 18 inch Rays Engineering Gram Evo 4s, Torsen LSD < Getting 1JZ-GTE love soon - Datsun 1600, 110rwkw Hot L20B, 75 Wade cam, ported, polished, balanced, bigger valves, close ratio 5 speed, 4.11 locker. 13.8 sec 1/4 mile - Mazda HC 1990 929 V6 JFT Turbo conversion, Torsen LSD, Tein HR Coilovers, 17 inch Racing Harts, Front mount intercooler.
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07-17-2008, 02:50 PM
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It is very intresting for me/ I have Mazda 929L 1978 with MA engine. But I want replace it to JE-ZE DOHC. What model of automamatic transmission I need and other parts?
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07-18-2008, 02:27 AM
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Mate, your car isn't efi, so first there is the part of the conversion where u have to fit an efi pump and fuel lines, wire in the computer etc. You will need the auto that it comes with, as this is also computer controlled. A custom tailshaft, speedo, engine mounts, gearbox crossmember, auto linkages, and a brake conversion (legally) etc.
Are you up to this? If so, theres lots of people on here that can help. Oh, n i love the 929L's  Couldnt have picked a better car, just maybe a better engine choice (V8 or JZ) :P
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1990 HC II Mazda 929 Hardtop - I hope it goes one day 2002 GU Patrol - twin lockers, front and rear bars, winch, draws, compressor, dual batteries, long range tanks + more
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