Isuzu I-Mark diesel

[truckinwagen]

actually, no.

I have everything for this one made up, and I need to stop buying things, so...

thanks for the pointer though, if I ever need another charger I will look for one of those.

-Owen

[truckinwagen]

well, I might have a lead on a local source for a cowl induction hoodscoop.

there are some pretty good prices online for them, but shipping to AK gets pretty stupid(like more than the darn thing costs by 10%)

waiting on a call back from a custom truck shop about if they can get one for me, but fingers crossed!

I am gonna back the injection pump off a bit too, it blows black bad at lower RPM, no real need for that so much, but good to know it can fuel enough

it is also running high EGT idling in gear, idle in neutral is about 250*, but put it in gear and it jumps to 400*
maybe I need to lower my idle speed a little...

cold idle it smokes black too, I am hoping that bumping the timing helps with that as well as my high rpm stumble.

will report back when I get around to fiddling with it.

-Owen

[theman53]

How much bigger displacement is this engine over VW 1.6? Sounds like you are right on with everything here and great build BTW. Are there any big drag strips up there? Around here guys are racing and always upgrading/destroying stuff and parts come cheap for guys that like to fab stuff up for street cars, sometimes anyway.
Do you think the high rpm stumble could be valve related or governor related? Just thinking. How are your brakes coming?

[truckinwagen]

the motor is a 1.8, but the head flows much better than a vw one(even the AAZ) as it is a crossflow, which allows really well shaped valve ports.

the high rpm stumble is fuel related, it ran right to 5000RPM no trouble until I did the hybrid pump.
I am guessing that the timing curve is not right for the bigger pump head causing it to be too retarded at high RPM(or could too much advance do the same thing?)
that an its getting the cloud of smoke with the stumble that indicates that it is no longer able to burn the fuel properly

the brakes are done except for the vacuum pump, I have the pump, but not a control switch for it yet, just need to order one.

there is a drag strip about an  hour away, and I plan on taking it down the strip as often as I can, even if it is only during the "test and tune" days

as for fabbing stuff, I am really liking this new welder of mine(best $50 ever spent) and am thinking I may make my own turbo manifold too.

-Owen

[truckinwagen]

I am gonna try and get my injectors checked/rebuilt (not just replace with remans, they cost $110 each!)
but am having trouble finding the sealing washers that seal the injector to the head.

the isuzu uses a separate seal and heat shield(unlike the vw that has one piece that does both) and I cant seem to find them online at all.

I called the isuzu dealer here in town, and they dont carry any parts for my motor at all!

gonna try some of the local diesel shops to see if they can get the parts and what they charge to reman a set of injectors.

the car has 223K on it, and I have no idea when the injectors were done last, and since I am pushing more fuel through them, they might as well be at their best.

-Owen

[truckinwagen]

well, the local shops have told me "pull the injectors and bring in the sealing washers, we will see if we can match them"

not gonna do that! what happens when they cant match them?
I would be without the car running!

gonna try some more places and try again.

-Owen

[truckinwagen]

well, found a source for the sealing washers, and at $12 a set(includes the injector to head and injector body seals) I am going to buy two sets!

also looks like the nozzles are the same size as the vw, and GM 6.2/6.5
so those just got easier to find.
I am thinking about using the GM nozzles, they are cheaper and I already know they work well on small engines.

-Owen

[truckinwagen]

just got confirmation that the car takes the long style DNOSD nozzle, like the early 6.2 and vw.

just ordered a set of early 6.2 nozzles for $6.50 each!

that and the injector seals are on the way too, so I should have refreshed injectors soon.

-Owen

[truckinwagen]

well, got the exhaust finished(for now)

here are the mufflers, which both sit behind the axle:


and the exhaust before the axle, and the over-axle pipe:


the bottom of the mufflers sit about even with the bottom of the differential housing, I would like them to sit higher, but I can deal with that later, the muffler might hit the ground occasionally, but not too bad(really just looks crappy from behind)

as for the supercharger manifold, its almost done!





just need to align the belt and drill the mounting flange, as well as cut an outlet and weld on a flange to connect the intake to.

-Owen

[truckinwagen]

oh, also I have to make a remote oil filler(as the supercharger will be sitting right on top of the stock oil filler)

I got a conduit coupler the right diameter to fit an S-10 oil filler plug(just a rubber bung), I plan on pulling off the breather from the valve cover, and making a blockoff plate with the conduit oil filler and a barb fitting for the oil breather.

that way the new oil filler will sit behind the supercharger.

-Owen

[truckinwagen]

Progress has been made!







got my remote oil filler almost finished, and still need to make the inlet flange for the charger as well as the outlet tube and finish welding.

as you can see I am going to have the outlet from the charger in the front and turn the corner to where I have the intake pipe now.

the belt in the pics is an old one from the G60 project I cut to use for alignment and measuring for the new belt.
gonna need a 56" six rib belt, should not be too much of a problem.

I am using the stock AC tensioner bracket and a VW diesel timing belt tensioner for the tensioner on the charger, and the standoff is just an old 1/2" deep socket that I never use.

-Owen

[rabbitman]

Cool

[truckinwagen]

thanks, I think so too.

I am making the remote oil filler and the charger inlet flange out of some lexan.

I am away from the tooling needed to work with steel for a while, and neither flange will be under pressure, so I thought why not?

and if I need to replace them later I can do that too.
but for now I can get some progress made.

I also got my bulkhead connectors for my battery cable, so I can finally tidy up the pass through the firewall
( the connectors go in a 1.25" hole and have a nut on either side for the cable to connect to)

I am also thinking about removing the rear seat(at least for a while) all I ever use it for is a shelf anyway, and removing it will make wiring the wiring for the water/meth, nitrous and battery cable easier.

-Owen

[truckinwagen]

got my remote oil filler/breather and charger inlet done:







and also installed one of the bulkhead connectors for my battery cable





just need to weld on the charger outlet yet.
(which will have to wait until I can borrow a garage again.
getting really close!

-Owen

[theman53]

That is great man. I am glad you work when it is frigid out...I am a girl sometimes.