[Darbym]

Hi Everyone

This is going to be a long post, sorry in advance.

I have been following this forum and especially the results of the Philippine forum for many weeks now. A bit of history... I tow an approx. 5000lb travel trailer (loaded, filled, max weight) with my small arsenal of JDM diesel SUV's. Starting 2 summers ago I started with a 2.5 intercooled turbo Mitsubishi Pajero (4D56). I could stay at about 100km/hr on the highway, but any small hill or incline speed would drop down to an embarrasing 30-40km/hr. Decided that wasn't going to work so I used my piece of crap $500.00,1988 Ford to tow it and got rid of the Pajero. Not to be outdone and always willing to ty something different I imported a 1992 Isuzu Bighorn 3.1 intercooled turbo diesel (4JG2). From what I read it has an approx to capacity of 7000lbs and I believed it should be just as good as the Ford for towing. I could easily cruise at 100km/hr with traffic, but once again any small hill or incline the speed would drop down to about 65-70 km/hr, egt's hitting 1300 ( not good)...hmm am I expecting to much. At this time I said to myself, I am going to get Toyota Landcruiser 4.2 turbo, no intercooler (HDJ-81) and I will be done with this once and for all. Landcruiser easily cruises at 100km/hr without a sweat but once again any small hill, incline speed drops to about 80-85 km/hr...crap, not bad but I thought for sure I would be able to cruise close to speed limit.

So right now I have both the Bighorn and the Landcruiser and stumbled upon your product. After seeing some of the results from the Philippine forums I am wondering if the Bighorn (approx.123hp/202tq) could easily match the performance of the Landcruiser (approx.162hp/267tq) in a lighter, more economical, better seating arrangement for my 3 kids tow vehicle. I was thinking of a m1 nozzle pre turbo and maybe a m2 or m3 post turbo to cool egt down. If this does not meet my requirements, I want to be able to install the kit on the Landcruiser. Once again an m1 nozzle preturbo and ??? nozzle size post turbo to cool egts down.

This has kind of turned into a mission of mine, an economical (for a tow vehicle) that can at least keep speed limit on smaller hills/inclines. Any advice is welcome and thanks.

[dvldoc]

Well I can assure you that drop off in speed will disappear with the kit. I would go D01-PRE-DO2 post on both vehicles and use a good sized tank 3L to 4L. Or you could mount something larger in the rear cargo area. I prefer trunk mounting the kit when ever I can, Keeps the pump out of the elements.

Your Bighorn can easily match that power and you will not get the lost of top end due to hill or load. And you EGTs will stall well under 1250F at all times. As well as lower engine operating temps. When I decided to introduce this there its because it's my second home and I have ridden in so many of my friends vehicles and wondered how they could be happy with that meager performance they were getting out of the motor.

We'll be back 24-26 of May for another dyno day. I'll see if I can't get our bighorn on the dyno this week to see what she is putting down in power to give you some hard numbers.

And when you quote factory horsepower and Torque ratings thats to the crank, you vehicle puts down about 17% less than that to the wheels

If the MPV we dyno'd with the 2.5L non intercooled engine was rated by factory hp/tq numbers it would be.
Mazda MPV(138hp/257lbstq)
VS
Bighorn (approx.123hp/202tq)
VS
Landcruiser (approx.162hp/267tq)

Due to the weight of the MPV vs the Landcruiser he will out perform you everytime.

[Darbym]

Really looking forward to the dyno results since they will actually pertain to one of my vehicles. What year Bighorn will you try and dyno and is there any other modifications done to it?

Was there actually a stage 2, 4 cylinder diesel kit listed on the site last week? Would this be the recommended kit for my application with a DO1,DO2,DO3, nozzle.

Thanks

[dvldoc]

I think it's a 2001 he has just a cold air intake, EGT/Boost gauges and that's about it.

Instead of adding anouther kit, since we are running out of space on the store front you can option up a Universal stage 2 kit, If you have a pressure sensor you will use the 2bar controller, If you don't have map sensor you need to get one for the controller to read. We also carry these as well. For the Bighorn D02 or D03 nozzle will be the sizes you would want to try. It just depends on how much consumption and power you want out of the vehicle.

[Darbym]

It will be intresting to see still, but your rig is totally different than my 92. Does your Bighorn have the 3.0 motor? The 1992 I own is still the good old mechanical injected 3.1.
So would the kit you described above still be the best bet? or would one of the more basic kits suffice?

[dvldoc]

Its the 4JGT-TC 3.0 Engine, If you don't want to add the extra electronics the stage 1 kit works just fine for you. The gains will be close to the same.

[Darbym]

I am all for electronics, I just remembered reading that you were coming out with some new upgraded stuff in the next little while.

[dvldoc]

Well order the Universal stage2 , a 3 bar controller and a 3bar map sensor with connector and you are set. Unless you can find a MAP sensor and conenctor there from a salvage place or from the local parts store.

I recommend the 3bar set up only because it gives you even more control to decrease flow because if you want less consumption you just turn the full point up higher.

[Darbym]

Any news on the Isuzu being dyno tested yet?

[dvldoc]

He has not been able to make it in yet, Probably will wait to our event on the 26th of may. We'll have a lot more than just that to put on the rollers.