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Post by superturbocompound on Nov 4, 2006 1:35:15 GMT 11
taking apart the super and the turbo to make way for an inlet pipe from the cleaner amd also installing a oil pressure regulator,go to www.fs2500.com,i will try to make me one of those using i micron filter.see if the oil comes out like honey. |
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Post by superturbocompound on Nov 9, 2006 19:14:36 GMT 11
did not work on a 3 micron filter,oil still black.will try a 1 micron next.did some calculation and ,if the supercharger outlat is 10psi it will only take 3psi from the turbo to produce 25psi of boost pressure in the inlet manifold
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Post by geeves on Nov 10, 2006 6:58:44 GMT 11
The black in the oil is relitively harmless and if you try to filter it at 1 micron the filter would have to be huge to prevent blocking. The acids that buid up in the oil are far more of a problem. These are normaly controled by the detergents in the oil which break down over time. This is why the oil needs to be changed every 5000km even if it still looks clean
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Post by superturbocompound on Jan 1, 2007 16:11:55 GMT 11
did more testing,it looks like if both supercharger and turbo charger are working at the same time,there will be very high boost but 'NO POWER",this is beacuse the engine does not have enough power to turn the supercharger and the turbo from exhaust pressure,so i open the VATN to max and big diff,instant power@no back pressure,i now need to stagger the chargers,i am making an air flow switch which all goes well may kick in the turbo at a higher rev,maybe 2500rpm or higher,
the supercharger power delivery is diferent from a turbo,power is very instant,nice ,but i don"t thing the power band will be wide.more testing...
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Post by superturbocompound on Jan 8, 2007 13:25:11 GMT 11
well the testing went well,as predicted the lower end power was good as mention earlier,and the turbo does kick in later,didn't see exactly but i does(there is some looose connection between the fuel pump and rpm meter somewhere),and a problem occured,burst the oil return for the turbo,messy,very messy.one thing i need to mention is the amount of wine it makes when the throttle is lift off is really loud,not good for the turbo,need to make a blow off valve soon,but the sound of the turbo spooling up is absolutely beautiful,just like a jet engine.more testing and repairs....
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Post by superturbocompound on Jan 18, 2007 22:05:28 GMT 11
fixed the return hose and went out for a spin,i changed the configuration of the supercharger,now the supercharger clutch disengaged when not in use or when i lift off the throttle,whine is less but still very apparent,i must now install a blow off valve,no choice,i don't like the idea having a big hiss after lifting the throttle,sound very "young punk with a hot jap car",espcially on a diesel.but never the less it has to go on the car,
The truth of the matter is the car is not very powerful,i may be doing something wrong or this lay out just doesn't work,torque is good but thats it.i still could be wrong because the engine really needs a rebuild,there is also the fuel pump which is still stock,maybe this is the key to unleashing those hidden horses,
The rebuild will commence next week sometime,it needs one badly,every testing i do result in a huge streak of white smoke on the street ,not to mention the noise from the straight down pipe which ain"t goood for the neighbours."COMMENCE THE REBUILD"
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Post by geeves on Jan 19, 2007 6:41:18 GMT 11
The white smoke might be water or unburnt diesel Should be easy to tell by the smell Ive also seen severe oil burning cause white smoke but that engine didnt go very far past the white smoke stage. Tweeking the pump to allow for the extra boost might unleash more power
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Post by superturbocompound on Feb 2, 2007 22:56:13 GMT 11
removing the exhaust manifold reveals that there is still wet oil on the exhaust manifold closest to the fire wall ,not good,it'll probably take a few days to get the whole engine out but ,i think i'll remove the small parts like the alternator inlet manifold air-con etc firsts before attempting to get the engine out.
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Post by superturbocompound on Feb 8, 2007 21:03:04 GMT 11
today the engines was striped and what was revealed was piston no.1 top .comp.ring land broken,all crankshaft bearing worn to the copper backing,not much damaged to the connectiong rod bearing,funny,severe wear on the top part of the cyclinder liner,especially the no.1 compring,deep groove around the liner.its going to expensive....
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adam
Isuzu Junior
Posts: 103 
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Post by adam on Feb 8, 2007 22:33:35 GMT 11
Can you get much aftermarket gear for this motor, or will it just be a stock rebuild?
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Post by superturbocompound on Feb 9, 2007 14:22:21 GMT 11
no much after market goodies,for now the N/A forged crank in going in to repalce stock turbo crank,bearing caps would be stock but appently ACL makes good bearings but they don't sell them here,a friend of mine had 5 sets of crower forged con rods made and he is trying to sell them but they're really expensive,rings would be stock acccept for the no.comp rings which are totalseal gapless ring.thats all i can list for now.
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Post by superturbocompound on Feb 16, 2007 21:06:04 GMT 11
had a lookat the oil pump,there is some slight scoring on the walls ,i wonder if that will effect my oil pressure,i hope not(althought i think it will,)
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mattmurdoch
Isuzu Junior
when the going gets rough..
Posts: 68
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Post by mattmurdoch on Feb 19, 2007 17:59:50 GMT 11
white smoke can also be a lack of intake, the air filter could be a tad blocked?, oil is ment to be black on a deisel its a good thing its all the crap from the engine it means the oil is doing its job.
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Post by superturbocompound on Feb 20, 2007 14:42:15 GMT 11
definetly not the intake,i was running no airfilters when testing,the bottom end of the engine was very clean,goes to show the cleaning properties of the motor oil.
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crazydave
Isuzu Baby
MAKE IT TO THE TOP OR BREAK IT TRYING
Posts: 13
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Post by crazydave on Feb 23, 2007 14:48:54 GMT 11
I had the white smoke problem on one of my isuzu projects at very high boost.
Turned out the injector pump was the issue, not sure of the details of how and why but thats what it was in my case. I replaced it with an old bighorn 2.8 pump that had been recon'd. some of the wires didn't hook up but I just taped them up. Goes real hard now after increasing fuel also advanced the injector timing a bit. Don't know if I have been of any help.
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Post by superturbocompound on Feb 28, 2007 18:38:32 GMT 11
i got a deck plate made and i'm having cast iron liners instead of the cromard liners,i don't think that the iron liners willbe as good but its the only way to have the bores blue printed,with the cromard liners if the bores run out i don't think it can be remedied,(correct me if i am wrong)
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Post by superturbocompound on Mar 17, 2007 15:55:27 GMT 11
gone back to the cromard liners,deck plate is done so now the are going to sleeve the cyclinder with the deck plate and bore the sleeve to accept the liner,hopefully this will work,purpose of the is to get the cyclinder round after head"s been bolted in.
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Post by superturbocompound on Mar 19, 2007 20:31:46 GMT 11
i'd like to thank dani4jb1t for sending that PDF file,fantastic info on the engine,very detail,i can now blueprint the engine even more accurately .thanks again dani....
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Post by dani4JB1T on Mar 21, 2007 11:17:13 GMT 11
oohhh...that was nothing mate...hehe....that`s the idea of this kind of forums....we all learn and share things.
cheers
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Post by superturbocompound on Mar 22, 2007 17:06:22 GMT 11
aaaahhhhhhh!!!!!!!! just discovered i have been running a cracked blocked for a few years,i discoved the crack after removing the liners,it was on cyclinder 2-3,could see signs of rust forming from 20mm from the top of the block to about 30mm before the bottom.damn!!!have to search a block now...head is complete now with new seats,guides and valves....on a another note a shop just open with a dyno machine,apparently a toyota 3L/5L running 30psi posted 250bhp...  |
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