I picked this 91’ Amigo up for $400 as a project. I mainly bought it to jerk around off-road at my buddies house. I came up with an idea of turboing the 2.6L 4 banger it had in it. After some thought, I picked up an IHI RHB5 turbo for it. I just started this project 2 days ago. I custom made a top mount manifold for it from some of the stock exhaust. I turned out pretty damn decent.
I still need to finish the exhaust, mount a probe gt intercooler up front and run the IC piping and bov. I am running into a probelm with the mass air flow sensor. Hopfully I can figure out a way to bypass it or just remove it and still have the truck run. I plan on running a 12:1 FMU for the fuel managment just to get it going. Then I plan on magasquirting it. I don’t think there are any places to get a Isuzu ecu chipped for a turbo setup. But then again not many people ever see an Isuzu, let alone turboed.
Remember this truck is only for fun! I could carless about HP gains, but it never hurts ;D
I also forgot to mention, this thing is lifted 6" in the rear. I am still working on the front end, damn IFS setup!
(Lift not shown in the pics)
Coolant lines now hooked up to the turbo.
Heres a small video, it’s hard to make out the turbo over the 4" down pipe.
Do you know if there’s any comparable motors with a speed/density EFI system from Isuzu (or whoever makes their motors)? You might be able to swap harnesses/ecus, or if you are going to run a megasquirt, that should do the trick.
Ah, just had to look- California emissions spec. '91 Amigo’s w/ the 2.6 had a MAP sensor (speed-density versus mass flow)- you might be able to get ahold of the fuel injection system off a Cali spec one and swap- just have to figure out what the range is on the map sensor in case you have to swap it out… but then again, not sure what else in addition, you’d have for available choices to compensate for fuel control…
…or there’s always finding out what other MAF sensors ‘might’ drop right in…
its just a shot in the dark but I know that LS1 MAF’s are famous for being swapped. They are seperate from the throttle body, so you can pretty much wire them up to anything…we wire them up to our v6 camaros when our MAF’s max around 60lb/min.
The down pipe is only 4" long and 2" in OD. I haven’t welded up the rest of the exhaust yet.
I was thinking about swapping the MAF sensor out in favor of another one. Not sure which one will work with it though. I mainly deal with Hondas, which don’t deal with MAF.
I was reading up on those. I may have to try to pick one up.
I was also told that when i swap to megasquirt, I could eliminate the MAF. I am not sure if its possible though. Again really haven’t delt with megasquirt either yet.
Thanks for the info guys! Any help is appreciated.
its going to be MUCH easier to get tuning done with a turbo with a MAF, then not having one…if you dont have a MAF, you have no readings of any airflow anywhere and this maxing tuning pretty much all a guess…which you do not want to be doing.
So do you think I would be better off just going with the megasquirt now. Or is there a better magament system for tuning turboed vehicals, besides a chipped ecu?
Well, what does the megasquirt use- MAP or MAF or your choice? Either is useable, but if it currently runs MAF, then you’re probably better off sticking with that, if you can. Otherwise, you’d be switching everything over to MAP, which would require installing/adding some sensors/wiring/whatnot you wouldn’t normally have (scavenge from the Calif. spec EFI?)
Yup, the turbo setup is all fiunished. I drove the truck around yesterday at a consistant 7 lbs. Will get more pics of the truck and a video of it today.
I have it running with a 12:1 FMU at the moment. It seems to surprizingly run real well with it. I may kep the fmu there for a bit until I figure out what ems to run on it.
It’s a mechanical fuel managment unit. For every 1 psi of positive vacume, it raises the fuel pressure 12 psi. It’s basically forcing more fuel pressure through the injectors. There not the best thing to run, but it gets the job done.
