My 52 GMC Build

[6DoF]

is that common rail injection with integrated rails?

[lower50's]

Originally Posted by 6DoF

is that common rail injection with integrated rails?

No its a HEUI system and it stands for hydraulically activated electronically controlled unit injector it was developed by Caterpillar. There is a (HPOP) high pressure oil pump (motor oil) at 3000psi pumped into the oil rails. the fuel is at 60-70psi then the plunger in the injector uses the 3000psi to compress the fuel to 21,000psi. Hope that makes sense. It was one of the first electronically controlled diesels in 1994.5, it's quite a reliable system apparently.

[6DoF]

oooooohhh, i have seen the previous mechanical version of that before. skip the injection pump in favor of multiple hydraulic amplifiers. diesels have some really cool tech.

[lower50's]

Motor work is coming along nicely, almost ready for reassembly.
I got my upgraded headlights last night, the led lights I was running where not bad but the new ones are amazing.
Second pic the new one is on the passenger side.
Last 2 pictures that is only low beam.

[oldman3]

Bob, like the way the bulb looks, never to much light in these trucks...Jim

[lower50's]

I Agree Jim

So My son and I are heading to the AD Nationals in one week!! Maybe I will see some of you there?
My truck will have over 26,000 great miles on it, most of it pulling our camper. This trip will be the last with this motor setup.

[piratexpress1369a]

How was your trip

[slammed57]

wow those
lights are awesome

[lower50's]

Originally Posted by slammed57

wow those
lights are awesome

Yes very happy with them!!

[lower50's]

Originally Posted by piratexpress1369a

How was your trip

Trip was great could not have gone better. Truck, traffic, border, weather, people, show all amazing. Can't wait for next year.

[piratexpress1369a]

Awesome pictures...glad you had a great trip

[lower50's]

The AD Nationals had a cruise of 17 trucks Friday eve drive half hour to a small cruise night. We had a small casualty on the cruise (oil pressure switch let go)but got it fixed easy and then we hung out at the fairgrounds till after midnight. I got the long distance award, 508mi to get there and peoples choice top 10. We did 1065mi on the trip 18.5hrs of driving, my son William and I had a great time.

[Tempest67]

that is amazing. congrats

Glad the trip was success.

great pics

[piratexpress1369a]

Awesome pictures...congratulations on the awards

[lower50's]

Originally Posted by Tempest67

that is amazing. congrats

Glad the trip was success.

great pics

Originally Posted by piratexpress1369a

Awesome pictures...congratulations on the awards

Thank you guys looking forward to next years show.

[lower50's]

So I got the cylinder heads back, all the vales and some of the valve seats had to be replaced due to the seat faces being pitted. Probably from getting to hot due to egt temps. This motor did not have a intercooler. But all fixed up now. started to get some of my go fast bits installed.

[6DoF]

now the fun begins!! :evilgrin:

that blue looks pretty solid against the AL, it's going to strand out something crazy against your black n red oxide truck.

didn't o-ring the heads while they were off? what kind of power are you shooting for?

[lower50's]

Originally Posted by 6DoF

now the fun begins!! :evilgrin:

that blue looks pretty solid against the AL, it's going to strand out something crazy against your black n red oxide truck.

didn't o-ring the heads while they were off? what kind of power are you shooting for?

Ya I think it will be a bright contrast. No O-ring, stage 3 build, should have just over 450whp and 750wtq at around 40psi boost. I have it on the dyno in the spring. Had my 1.9L TDI Jeep on the dyno 121whp, 247wtq

[6DoF]

Originally Posted by lower50's

Had my 1.9L TDI Jeep on the dyno 121whp, 247wtq
[ATTACH]2227198[ATTACH]

at the tires is pretty solid for that little thing ... ALH? around 18psi?

[lower50's]

Originally Posted by 6DoF

at the tires is pretty solid for that little thing ... ALH? around 18psi?

Ya I thought so. ALH, 20psi, .216 nozzles, 2 1/4" mandrel bent exhaust.

[lower50's]

Well after taking some time to work on our new cargo trailer camper while the weather was nice, I'm back on the motor swap. I got the upgraded injectors and push rods all in and new exhaust up pipes in and wrapped. Regulated fuel return system all in, the motor is together. Then I started pulling the truck apart, I'm sad and excited all at the same time.

[chevy_man5]

Hopefully the inspector in that last picture approves all this work!

Originally Posted by lower50's

Well after taking some time to work on our new cargo trailer camper while the weather was nice, I'm back on the motor swap. I got the upgraded injectors and push rods all in and new exhaust up pipes in and wrapped. Regulated fuel return system all in, the motor is together. Then I started pulling the truck apart, I'm sad and excited all at the same time.


Attachment 2232591

[lower50's]

Originally Posted by chevy_man5

Hopefully the inspector in that last picture approves all this work!

Sometimes I need to bribe him lol

[lower50's]

Well 7.3L idi diesel and transmission are out and 7.3L powerstroke is set in-ish. I will need to cut some of the fire wall at the top as well on the drivers side a bit. The motor is sitting on the motor mounts but needs to go back 1". Now to pull under the dash apart and remove all the wire to do with the old motor, then I can cut.

[Tempest67]

well, you can't turn back now.

looking good,


Hope all is well