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Post by jacko95t on Apr 16, 2009 14:01:02 GMT 11
im just wondering how much more boost can i run in my 3.1L turbo diesel jackaroo its a 95 model atm its reading 12-13.
whats the max amount i can run without doing damage to the engine?
BTW car is basicaly stock
cheers
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Post by geeves on Apr 16, 2009 15:42:13 GMT 11
12 - 13 is good. You can tweak it to 15 but the gains will be minimal. Standard is 10. More can be achieved but it means a few other minor changes. Also a 95 might have electronic control which means that you cant easily adjust the fuel to match the extra boost. Boost on its own does little for power
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jer0
Isuzu Junior
Posts: 63
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Post by jer0 on Apr 16, 2009 18:41:06 GMT 11
before I modified my turbo my 1994 3.1 ran 13 psi stock
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Post by mulover on Apr 17, 2009 11:04:12 GMT 11
Unless you have blocked off all the egrs and the pressure relief valve that comes off the inlet manifold then there is no point in adjusting it. As geeves said, you need to be able to adjust the fuel to make adjusting the boost worth while. I've had mine set on 16 for ages, they will boost out to 20 plus psi (hose came off while testing), but this is not recommended.
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Post by batosai on Apr 30, 2009 12:37:04 GMT 11
Hi All,
I have read an article on this by adding washer on the waste gate to add more stress on the spring of the waste gate so it wold (fool the watse gate) delay its opening. They try this on Pajero equip with 4d56TDIC engine and they said the result are ok and they gain HP. Can we also try this in our 4JG2 or the engine would only suffer due to overboosting. Does any one try to play on the turbo of a 4JG2?
TIA
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Post by mulover on Apr 30, 2009 13:56:17 GMT 11
Would probably be just as easy to fit a boost controller and then you can set the desired pressure.
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Post by JustinW on Apr 30, 2009 15:22:49 GMT 11
On my electronic 4JG2 the guys who did it used a boost controller (14psi) because it was quicker than playing around getting the right number of washers and tweaked the fuel pump. The down side with tweaking the electronic fuel pump is the idle goes up as well.
Generally if you increase the boost you need to increase the fuel to take advantage of it. The other thing that is recommended is a bigger exhaust to remove the extra heat.
Mine ran 10psi standard
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Post by batosai on May 4, 2009 16:55:10 GMT 11
Hi guys,
I'm planning to Install a boost gauge (auto meter brand) I dont knw where will I tap the "T" for accurate reading? Can someone post some picture and step by step instillation of Boost Gauge (4JG2 TDIC)
Thanks
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Post by geeves on May 4, 2009 19:52:56 GMT 11
There are several pipes connected to the large pipe that goes between the turbo and the intake. If yours is intercooled then the intercooler is in place of this pipe and the same is true. A T piece in any of these pipes is fine
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Post by batosai on May 5, 2009 13:17:54 GMT 11
Can you pls elaborate on this, or if you can provide some picture it would be great. I only see two small pipes connected in the intercooler but its is to small I think it is much smaller than the pipe connected in the valve of EGR. One is connected under the (leftside if your in front of the engine ) intercooler and the other is into the side with valve at the intake side before the intercooler. Would any of this Line will do?
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Post by geeves on May 5, 2009 14:34:54 GMT 11
The first line you describe is the one Im useing.
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Post by batosai on May 5, 2009 16:54:45 GMT 11
Ah ok, Thanks geeves...
May I ask (out of the topic) are your rig LHD or RHD?
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Post by geeves on May 5, 2009 19:56:35 GMT 11
rhd
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