'55 Chevy 3800 Cummins

[Cobound]

Officially like everything now but the doors.











JK, JK

[xj_man_646]

Originally Posted by 6DoF

the cooler charge will help the 2nd turbo efficiency, you are compressing cooler denser air. you also end up with less heat load for the main cooler to deal with.

Old Smokey F1 is the easy example to find. he had a water-to-air mid stage cooler, and the air-to-air final. he also had a MASSIVE rear mounted rad for the engine cooling, reverse of me. shame that truck got so wadded up again.

https://speedhunters-wp-production.s...0-1200x811.jpg

That picture looks like the charge goes from the water to air, to an air to air. Not into another turbo before the air to air.

edit: I went to find another pic of it. You're right.



Was this thing built for Pikes Peak? Makes sense if so; at altitude, the compressors need to work harder to build the equivalent boost as sea level, which causes excess heat in the charge, lowering your manifold air density and reducing power.

[6DoF]

Originally Posted by xj_man_646

That picture looks like the charge goes from the water to air, to an air to air. Not into another turbo before the air to air.

edit: I went to find another pic of it. You're right.



Was this thing built for Pikes Peak? Makes sense if so; at altitude, the compressors need to work harder to build the equivalent boost as sea level, which causes excess heat in the charge, lowering your manifold air density and reducing power.

i don't think it started out as a pikes peak rig ... but he definitely finished it off on pikes peak with that crash.

[6DoF]

IT RUNS AGAIN!!

exhaust is fully wrapped and re-installed, and my turbo drain -10an hose showed up a day early!

fired that thing off last night and everything seams good. both turbo's spin and were getting oil at least exhaust sounds pretty decent, only one new leak at a fuel line that might have just been a loose fitting.

idle is really high with the new huge injectors though, and just turning down the idle screw wasn't enough to get a stable low idle. now it's time i figured out the P7100 tuning and started turning screws.

[Dennis]

Awesome!!!
This build has been cool to follow.
Can't wait to see it rolling and towing!

[xj_man_646]

I haven't heard of injectors having an effect on idle speed before. That is interesting. How much larger did you go over stock? What did you do for a fuel plate? I can't recall if that came up in the past.

[6DoF]

it's entirely possible that i need to re-adjust the new gov springs too actually.

injectors are the new Power Driven Diesel Power Jet's ... they don't list a size or hole qty cuz they are cut different than any other 2ng gen nozzle. keeps ppl from comparing apples n oranges i guess. i got "stage-3: up to 750hp"

fuel plate still un-touched by me, but also unconfirmed if the prior owner did anything with it. i'm going to order the max travel AFC kit to have better control of this boost level and bench set it for what i'm shooting for.

[MBood82]

So when is the burnout vid???

[6DoF]

Originally Posted by MBood82

So when is the burnout vid???

March

[Dennis]

Four years into this thread.....
.....can't wait!

[xj_man_646]

Its hard to believe, for me, that it has been that long. Time since COVID seems to have sped up 1.5x or so, at least it seems that way. The pandemic somehow ruined my sense of time

[6DoF]

2017 was when i started this version of the thread ... i had gotten the truck year or 2 before that.

[xj_man_646]

2.5 years between posts 1 and 2.

[6DoF]

did a lot more staring at things over the weekend and trying stuff, then trying again til i finally got what i liked. new shut-down cable is in! it's actually a locking cable, but could just be a basic choke cable it if i wanted now. no springs, just pull on, push off, lock if ya want. probably lock-on to make sure it maintains full fuel ability.

re-did the throttle cable to delete the 2nd gen TPS and extra unnecessary linkages. just need a new throttle return spring and mount to really make that prime.

got the radiator installed and fully piped! i'm not a huge fan of the upper hose, but not the end of the world either. if there's ever an issue i already found steam ports made to cut into silicone hoses.

took the pump AFC apart to hopefully start to dial in the fueling a bit and smoke out the shop way less ... fawk, i should charge the batteries after all the starting ... key now is going to be getting things ready at the bare min to drive it. gauges, wiring, fix air leaks in bag lines, etc. then i can start work on the bed and other cosmetics knowing worst case she's viable.

[Dennis]

Originally Posted by xj_man_646

The pandemic somehow ruined my sense of time

I think that is a universal world wide thing.

[6DoF]

started to get the 3D put together for a bed structure with hatch. thinking 1x1 framework with 3/4" ply over it, and lift-off style hinges

[Dennis]

You should find some vintage Craftsman or SnapOn chests to mount there.

[xj_man_646]

Kinda wish I still had some CAD skills for stuff like that. Not that I'm building anything anytime soon, but that is neat.

Did you find a model of the 14b or do that one yourself?

[6DoF]

Originally Posted by Dennis

You should find some vintage Craftsman or SnapOn chests to mount there.

i actually have an old patina job box for the bed! "dry" lockable storage since the cab has none.

[6DoF]

Originally Posted by xj_man_646

Kinda wish I still had some CAD skills for stuff like that. Not that I'm building anything anytime soon, but that is neat.

Did you find a model of the 14b or do that one yourself?

CREO is free online from PTC for student edition. no need for a .edu email either, just tell em you're learning or teaching.

i found the 6bt and 14B files, yeah.