Hey guys
I have been asking around a bit lately about wiring on my isuzu's charging system.
I have dove alot of reading and bush65 has posted a few diagrams which I cannot remember where to find nowum what I really need is someone to draw me up a basic diagram on how to wire up the charging circuit on a isuzu alternator(main wire and the plug with 2 wires out of it)-voltage regulator (show what each wire on the reg does/goes to seeing as though the reg has a plug attatched) and then from there to the battery etc etc a hand drawing of where the wires go(with colours marked) would be awesome if not any pics will help
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Thanks guys for all the help lately too![]()
Hercules: 1986 110 Isuzu 3.9 (4BD1-T)
Brutus: 1969 109 ExMil 2a FFT (loved and lost)
Thanks flagg thats the one I was thinking about...but even after sitting here reading the diagram I just can't seem to get my head around itI know it should be simple even more so as I am a leco
but for some reason I cannot determine what pin I need to wire to the lugs on the regulator plug and then from what lug to the battery
im not worried about the indication lamp or any of that because I will know when theres a problem with charge because the battery will be flat
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I know what i'll do ! I'll start the car and test what voltages come out of where and go from there as long as 14.6v is going into battery right?
The info in the thread that flagg posted a link to came from an Isuzu manual.
I recently (in last month from memory) posted the wiring diagram from the Landie 110 with 4BD1 supplement in another thread for Matt (rovercare).
Thanks bush ill do a search for it....also way off topic but what is your opinions on "superB twin turbo packages"? Not that im gunna purchase one just curiousalso would a gt3076R with a .63 exhaust a.r suit or engines or would it be to large?
Sorry, I don't know about those turbo packages - do you have a link.
I'll look up the specs for the GT3076R later and update on Monday. My 1st impression is it would be slow to spool on your 4BD1 - you would need to have a shop max out the fuel delivery from your injection pump, as it probably has 8.5mm plungers.
Even a 4BD1T pump with 9.5mm plungers will need the torque cam adjusted to get enough fuel (the torque cam limits the travel of the control rack).
Edit: link to post where wiring diagram in pdf format was attached.
Thanks john..... I would send you the link to both the turbo's and the garrett specs but I am unfortunately not using a computer at the moment (hence spelling mistakes lately)
I have talked to a few places about getting the torque cam ground and from what I have been told its going to be an expensive procedureis there anywhere you may suggest? Its so annoying trying to deal with most diesel services they want to charge through the roof and they think everyone knows nothing about anything apart from them...
Thanks for the link too![]()
I had a quick look at the Garrett maps and formed the same conclusion but wasn't able to find the time to get back to this thread on Mon.
Just now I put some data into the Squirrell calculator for reference - refer this link (Edit: click on the refresh maps button after the page opens).
The map for GT3076 below shows the compressor is too large for the data input.
The map for GT3071 below is much better IMHO and has room for better performance.
For the data input the GT2871 with 48 trim 0.6 A/R compressor is possibly the better choice of the turbos tried during this exercise.
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Last edited by Bush65; 6th September 2011 at 09:47 AM. Reason: Additional info
I have the specs for Garrett's aftermarket turbos and don't need a link.
The adjustment screw that links the tension lever to the torque cam needs adjusting to allow the control rack to travel further in the increased fuel direction. But because the 4BD1 IP (like the one on my 4BD1T) lacks a boost compensator, IMHO the profile of the torque cam will need modification to reduce fuel at low engine rpm - until the turbo produces suitable boost.
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