bubblegoose Posted April 27, 2009 Share Posted April 27, 2009 question 1 on the side of the 4g63 dohc head there is a banjo bolt hanging out i assume thats the turbo oil feed right? question 2 if it is will it be ok as an oil feed for a diesel alternator? question 3 anybody got a small low amp diesel alternator with vac pump for sale? Quote Link to comment Share on other sites More sharing options...
Raizer Posted April 27, 2009 Share Posted April 27, 2009 If it is the oil supply it should be ok to use. But wtf are you planning?? lol Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 27, 2009 Share Posted April 27, 2009 whatever he is planning - it will suck Fuck I'm funny Quote Link to comment Share on other sites More sharing options...
peteretep Posted April 27, 2009 Share Posted April 27, 2009 depending on how my vacuum works out on my car, i could fit a diesel alternator with a vac pump for my brakes, would probably suck way more juice than is reasonable though Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 28, 2009 Author Share Posted April 28, 2009 thats why i want a small alternator. all it needs to power is the lights and engine no sounds or shit and yes its just to power the brakes Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 28, 2009 Author Share Posted April 28, 2009 whatever he is planning - it will suck hope so other wise i might be going places (read: walls) that i didnt want to Quote Link to comment Share on other sites More sharing options...
tortron Posted April 28, 2009 Share Posted April 28, 2009 wont the rpm range of the alternator be way out? so itl think its over charging and cut out Quote Link to comment Share on other sites More sharing options...
Yowzer Posted April 28, 2009 Share Posted April 28, 2009 It'll probably need a bigger pulley on the alternator to drop its revs down a bit. Quote Link to comment Share on other sites More sharing options...
peteretep Posted April 28, 2009 Share Posted April 28, 2009 dont know a whole lot about how alternators work but wouldnt the regulator just take care of that? i though most alternators maxed their output at around engine speed 3000rpm anyway? Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 28, 2009 Author Share Posted April 28, 2009 tru dat^ it will also be under driven, i figured 75amps should be more than enough to cover with my cars requirements Quote Link to comment Share on other sites More sharing options...
peteretep Posted April 28, 2009 Share Posted April 28, 2009 hmm, after reading, it seems that alternators are sized so their max rpm(not max output) is about equal to the engine max rpm, so a diesel alternator would need to have its pulley(or the other pulley) changed to suit, on one site i read, it said that max alternator rpm is 12000 to 14000, so whatever that works out to be, which I think should also give you almost max power output at idle my engine will be running a 37amp(factory) alternator at the moment, unless i find a bigger, better suited one, and I will be running a similar setup to you I think Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 28, 2009 Author Share Posted April 28, 2009 37 amp? how low can you go, i want to minimize hp loss seeing as im going to use some (read: proably heaps) powering the vac pump i was thinking of using pulleys of about 1:1 > 1.3:1 car will probably have a high idle anyway Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 28, 2009 Author Share Posted April 28, 2009 just out of curiosity what engine/spec are you building? Quote Link to comment Share on other sites More sharing options...
peteretep Posted April 28, 2009 Share Posted April 28, 2009 ive just got a 1600 escort motor with a cam in it, pretty much, but running bike carbs, so vacuum may be an issue Quote Link to comment Share on other sites More sharing options...
Hemi Posted April 29, 2009 Share Posted April 29, 2009 just a thought but if your thinking of doing this i can prob see you running out of vacuum under hevy braking , all the light trucks ive seen have tank for holding vacuum , however ive not looked at other systems , im sretty sure some diesel vehicles that dont have the tank have a butterfly on the intake manifold that can close to cause vacuum , how the other ones work i dont know :S , in short ive pulled one of those vacuum pumps apart (which needs oil feed aswell (i think you know this)) and i dunno ive it could shift enough air to create enough vacuum in a short enough time . Quote Link to comment Share on other sites More sharing options...
forced Posted April 29, 2009 Share Posted April 29, 2009 What do you need vacuum for? The brakes? The brake booster has a valve in it to hold the vac. All you need to do is blip the throttle a couple of times. Slowing down with the throttle closed will also give good vac. A lot of Diesels are 24V, you'll need a 12V one. The load on the motor is proportional to the current the alternator is supplying. A 35 amp alternator will put the same load on your motor as a 100 amp alternator if the battery is fully charged, it's in the same car and so long as you're not trying to suck out a rediculously large load like sounds (mentioned) or lights. Steve Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted April 29, 2009 Share Posted April 29, 2009 if you're keen on it then the 24v thing wont be a problem at all. what forced probably didn't realise before posting is that hiluxes, l300s, l200s, navaras, corona diesels, pug diesels blah blah blah blah blah all have vaccuum pumps on the back of their alternators for this exact reason. and they're sure as fuck not 24v. alot of the utes and stuff have also got vaccuum tanks. 4x4 hiluxes definitely do. they';re heavy duty as fuck usually to charge the larger batteries required for diesel engines. if you're not a wuss you could adapt any of these probably. you may need to run a dual belt, or, shudder to think, gilmer setup if you're so inclined to help stop belt slip without killing fanbelts and having it slip as you're running alternator load PLUS vac pump load. mean also you probably wont need a vaccum pump. perhaps you could be even more eccentric and get a vaccuum pump and hook it to a cooling fan motor, and to a relay that switches it on every tie you hit the picks, or when it falls below a certain vac level in a tank eccentric ftw Quote Link to comment Share on other sites More sharing options...
kpr Posted April 29, 2009 Share Posted April 29, 2009 you should have plenty enough vac for the booster. mine doesnt have any problems with big cams and quad throttles Quote Link to comment Share on other sites More sharing options...
peteretep Posted April 29, 2009 Share Posted April 29, 2009 does your vacuum come off all 4 runners or just a single one? Quote Link to comment Share on other sites More sharing options...
bubblegoose Posted April 29, 2009 Author Share Posted April 29, 2009 im not plumbing my intake into my booster thats the reason why im doing it (personal preferance so stfu) i will not be running sounds or gay shit like that and i was planning on using a 5 rib belt, the alternator is the only thing running off it, no fans or power(girl) steering so slippage should be an issue Quote Link to comment Share on other sites More sharing options...
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