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Post by mulover on Aug 26, 2005 18:37:09 GMT 11
I was looking on another 4wd site a while ago and found an article about putting a low pressure, high volume fuel pump just after the fuel filter on a 89? nissan safari with direct injection. A guy i know tryed this on his 94 mu and it made no differance. So i'm wondering if the fuel pump set-up on the 94 mu's is differant to the 92 mu's and would this work on my 4bj1t?? It gave the guy loads more top speed and a small preformance gain across the full range.
Any help or ideas would be appeciated.
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Post by geeves on Aug 26, 2005 18:54:34 GMT 11
Sounds to me like it was done to hide anouther problem unless theres an issue with getting fuel all the way from the back of a lwb safari on steep hills. Post the link it could make interesting reading.
It might also be that the Safari uses a linear pump not rotary like our much smaller engines
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Post by mulover on Aug 26, 2005 19:10:18 GMT 11
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Post by geeves on Aug 27, 2005 8:57:08 GMT 11
Hes trying to suck far more fuel than the standard setup hence the need for an extra pump. Dont know about this safari in particular but Ive heard of these motors running up to 25psi boost and well over 200kw. Its a rare Safari owner that complains of running out of go above 3500 This is past there normal red line
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Post by mulover on Aug 27, 2005 18:13:40 GMT 11
It's just a thought, might find a pump and give it a go, whats the worst that could happen?  |
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Post by geeves on Aug 27, 2005 20:42:19 GMT 11
Worst that could happen leaks at the joins seals in the pump but I think thats unlikely. I recon the worst that will happen is nothing but let us know. A lot of other injected cars use a pump mounted at the tank to push fuel up to the main pump Essentialy your doing the same thing.
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Post by mulover on Aug 27, 2005 22:11:40 GMT 11
Yeah , i rcon nothing too bad can happen, the guy i know who tried it in his mu has got a pump with a pressure cut-out switch that lets go at about 7psi, so it can't do much damage, basically the only way this can help is by slightly pressureizing the fuel before the motors fuel pump which would mean less load on the motors pump, Who knows, looks like i'll just have to try it!!
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darkhunter
Isuzu Junior
isuzu trooper 2l upgraded to 2.6, injecting later,gonna be a beast soon
Posts: 105
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Post by darkhunter on Aug 27, 2005 23:53:59 GMT 11
you could also use a fuel regulator with any fuel pump you use there's a few around nowaydays some even have room to put in guage to monitor pressure if desired.
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but i would probably look at putting in bigger cc injectors myself as you are better off running bigger injectors at a maximine of 80% than than running standards at 100% as injectors give a better mist at 80% and more efficiant,
therefore if you have made your engine breathe more efficiant,bigger cc injectors you would get a better air fuel mix over standard injectors running at 100%
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Post by mulover on Aug 28, 2005 7:41:43 GMT 11
Bigger injectors ay??? Any idea of part numbers etc? I would be keen to give that a go, am thinking of getting a full dyno tune once i've put all my front drive train back together.
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