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4jg2 exhaust

Getting the best performance from your Isuzu, the in's and out's

Re: 4jg2 exhaust

Postby MUVIT » Sun Sep 27, 2015 7:50 am

me too
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Re: 4jg2 exhaust

Postby Powertruck31T » Tue Sep 29, 2015 2:02 pm

Hi Gazza If I get some time I will take a pattern off my own one and look at making another couple of them up.
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Re: 4jg2 exhaust

Postby danz20 » Sat Oct 03, 2015 11:43 am

matt man nz are you on the nz Isuzu face book page??
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Re: 4jg2 exhaust

Postby tealz83 » Sun Oct 04, 2015 6:04 am

I fitted a full 3" from turbo back and made a big difference once fuel was adjusted. Was very happy with results. I all for making the engine run and breath as easily as possible. Good gains and drivability
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Re: 4jg2 exhaust

Postby Gazza1904 » Wed Oct 07, 2015 5:58 pm

Let me know how you go and how much
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Re: 4jg2 exhaust

Postby Dinger95 » Mon Oct 12, 2015 10:48 pm

Don't know if you saw this or not, BrokenMu who had my down pipe made,
posted contact info for Ron @ USA Exhaust in Victoria, not sure if he has just a few or is making them.
viewtopic.php?f=29&t=1664&p=43823#p43823
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Re: 4jg2 exhaust

Postby polyarkos » Tue Nov 03, 2015 9:40 am

Yup, I'd bee keen! I'm in CHCH too if you ever need a test dummy...... :D
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Re: 4jg2 exhaust

Postby polyarkos » Wed Nov 04, 2015 1:26 pm

polyarkos wrote:Yup, I'd bee keen! I'm in CHCH too if you ever need a test dummy...... :D


But in all seriousness I'm very keen on one of these. I will be getting and exhaust fitted before Xmas, and this will allow me the full 3" exhaust I want instead of the 2.5" I'm looking at.
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Re: 4jg2 exhaust

Postby tealz83 » Thu Nov 05, 2015 3:43 am

Make sure you fit a exhaust temp probe at the dump pipe or before the turbo while you are changing your system. Worth every cent since you will be adjusting your fuel to suit the new exhaust system. Ultimate setup would be to fit the exhaust temp probe before the turbo as this gives a far better and true reading and the fit a Wide Band Air Fuel Sensor in the dump pipe. This will make turning the fuel to the prefect 21-1 air fuel ratio. I have done this in my Safari TD42 and had it tuned to 155KW at the rear wheels on a safe tune.
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Posts: 71
Joined: Tue Mar 15, 2011 3:45 pm
Age: 28
Country: NZL
City: Whangarei
Vehicle: 1994 SWB Bighorn. 3.1 TD
Sports air filter
18psi boost
3" exhaust from turbo
Fuel adjusted
32 11.5 r15 Maxxis BIGHORNS
50mm Rear spring lift, adjusted front.
50mm Body lift. 50mm fuel tank lift

Re: 4jg2 exhaust

Postby polyarkos » Thu Nov 05, 2015 7:36 am

tealz83 wrote:Make sure you fit a exhaust temp probe at the dump pipe or before the turbo while you are changing your system. Worth every cent since you will be adjusting your fuel to suit the new exhaust system. Ultimate setup would be to fit the exhaust temp probe before the turbo as this gives a far better and true reading and the fit a Wide Band Air Fuel Sensor in the dump pipe. This will make turning the fuel to the prefect 21-1 air fuel ratio. I have done this in my Safari TD42 and had it tuned to 155KW at the rear wheels on a safe tune.


This is what I like to hear! Already have and Auberins Boost and EGT setup installed, EGT probe fitted about 50mm before the turbo. My biggest concern is running the auto g/box and huge torque
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Re: 4jg2 exhaust

Postby tealz83 » Sat Nov 07, 2015 4:02 pm

I had an Auto box too. I flushed the system and fitted a trans cooler. I would recommend this. We had a late model Prado at work that split the auto cooler that's incorporated into the radiator. Lets just say that it was a big bill. $$$$
tealz83
Isuzu Junior
 
Posts: 71
Joined: Tue Mar 15, 2011 3:45 pm
Age: 28
Country: NZL
City: Whangarei
Vehicle: 1994 SWB Bighorn. 3.1 TD
Sports air filter
18psi boost
3" exhaust from turbo
Fuel adjusted
32 11.5 r15 Maxxis BIGHORNS
50mm Rear spring lift, adjusted front.
50mm Body lift. 50mm fuel tank lift

Re: 4jg2 exhaust

Postby polyarkos » Wed Dec 09, 2015 11:15 am

Downhillnz wrote:
geeves wrote:half your money and 10% of the gains are in that front pipe. If you want the ultimate do it but I wouldnt bother unless it has to be changed


I'm yet to understand why. The time to make a dump pipe vs making the rest of the exhaust is crazy.

It took me around an hour to have the dump pipe made. vs a whole day to make the rest of the exhaust.


I'm looking for a 2.5"+ full exhaust and after talking to a couple of places in CHCH they will do the exhaust from the flexi back in a day, or a whole week to do the dump pipe as well.

Any suggestions for a good exhaust place in CHCH that can do a full 2.5"+ exhaust for an Auto 3.1 Bighorn?
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