1972 Chevy 4wd Longhorn Project: Never Ending Changes

[Dieselwrencher]

Originally Posted by woodwright

What I was getting at, is if you are not gonna need AC, you can adapt a 70s or 80s chevy non-AC truck heater. the outer air box is pretty small.

No, this turd is getting a/c and I'm going to use the stock stuff. I can make the turbos fit around it one way or another.

[ryanroo]

Originally Posted by 6lcummins

For the hard to find part of it, but when you make over 500HP the gear to gear wont hold the 1000lb ft of torque very well. NP241DHDs hold well over 1800lb ft and are easier to find.

Originally Posted by Dieselwrencher

What he said.

I've broken inputs and outputs with a divorced 205 truck I had. Then I put a 29sp in it and did it again. Then I purchased the pro fab billet parts and broke those. No warranty and no money back from that deal so yeah I'm nervous of 205's with diesel power.

this is interesting. in the world ive been living in (off-road and rock buggies/engine conversions) that was not ever the case. 205s are god there. or of course the atlas if you have that budget. i love my 205 in the hunk-o-jeep. i rage the weewee out of that 6000# BBC rattle factory and never have an issue.

i may have to reconsider my ideas on t-cases considering the chances of smacking the case on a rock is near non-existent for my build. opens up some options anyhow. do you see a difference in the rate of explosion auto vs. manual?

as far as hard to find cases, i can turn GM small bearing cases into big bearing cases pretty easily. i have 3 in my garage that would make wonderful figure 8 big bearing cases with little effort.

ryan

[ryanroo]

sorry to hijack. i assume you need to run the early late 80s-early 90s 241? is this the same strength as the dodge 241dhds? i cant find reference to a p-drop dodge 241 case anywhere. also, the GM versions will have a 32 spl. input and the dodge tranny has a 29 or 23 spl input. swapski?

how do you plan to attach it to the dodge tail housing? as far as i know the 6 hole pattern is incompatible as far as clocking goes.

thanks

ryan

[jbclassix]

Since all of you guys are all talking about blowing up NP205's behind a diesel, do you guys think I will be ok running a 205 behind a 6.5L/NV4500 turned up to 300hp?

[6lcummins]

Originally Posted by ryanroo

sorry to hijack. i assume you need to run the early late 80s-early 90s 241? is this the same strength as the dodge 241dhds? i cant find reference to a p-drop dodge 241 case anywhere. also, the GM versions will have a 32 spl. input and the dodge tranny has a 29 or 23 spl input. swapski?

how do you plan to attach it to the dodge tail housing? as far as i know the 6 hole pattern is incompatible as far as clocking goes.

thanks

ryan

The ones we use are for dodges, would be 94-present if you are looking for tcases. Will have to flip them though and do a few mods. NP241DLD, NP241DHD, NP271, and NP273 are all factory Dodge T-cases.

Originally Posted by jbclassix

Since all of you guys are all talking about blowing up NP205's behind a diesel, do you guys think I will be ok running a 205 behind a 6.5L/NV4500 turned up to 300hp?

You should be fine, it's when you get over 500HP the issues start.

[jbclassix]

Originally Posted by 6lcummins

You should be fine, it's when you get over 500HP the issues start.

If I get that out of a 6.5L I will have bigger problems than a weak t-case!

[mknittle]

Originally Posted by Dieselwrencher

No, this turd is getting a/c and I'm going to use the stock stuff. I can make the turbos fit around it one way or another.

Given the size of the wheel wells on these trucks vs wheel travel a well mod wouldn't hurt if it comes to that. For turbo clerance.

[Dieselwrencher]

Originally Posted by ryanroo

sorry to hijack. i assume you need to run the early late 80s-early 90s 241? is this the same strength as the dodge 241dhds? i cant find reference to a p-drop dodge 241 case anywhere. also, the GM versions will have a 32 spl. input and the dodge tranny has a 29 or 23 spl input. swapski?

how do you plan to attach it to the dodge tail housing? as far as i know the 6 hole pattern is incompatible as far as clocking goes.

thanks

ryan

I plan on using a 241dhd from an auto trans pending it has the speedo set up on the tail shaft. If it doesn't I'll have to use a 241DLD from my brother's truck. I will reclock it where I need it and modify the pick up tube for the oil pump in the tcase. Another advantage to a 241 over the 205, is the 241 has a lower low side.

[Dieselwrencher]

Originally Posted by jbclassix

Since all of you guys are all talking about blowing up NP205's behind a diesel, do you guys think I will be ok running a 205 behind a 6.5L/NV4500 turned up to 300hp?

I think you better cross your fingers and start praying now for the 6.5.

[Dieselwrencher]

Originally Posted by mknittle

Given the size of the wheel wells on these trucks vs wheel travel a well mod wouldn't hurt if it comes to that. For turbo clerance.

That's what I'm thinking. I will cut out the wheel well on the RH side and cut modify what I need to to get them in there and route the exhaust according.

[MrBeast]

Originally Posted by Dieselwrencher

I think you better cross your fingers and start praying now for the 6.5.

I have had 3 6.5's that was 4 too many!

[6lcummins]

Originally Posted by jbclassix

If I get that out of a 6.5L I will have bigger problems than a weak t-case!

300HP is asking a lot out of one of those...

[Dieselwrencher]

Today I ordered my billet freeze plugs for the engine and a seat heater for it. More parts for the pile.

[mknittle]

Originally Posted by Dieselwrencher

Today I ordered my billet freeze plugs for the engine and a seat heater for it. More parts for the pile.

I need a steering wheel and shift knob heater.

[ryanroo]

a little something from colorado for your longhorn. i'll need a shipping address. i also promise not to be so slow in shipping it that you have to wait to drive it because of me. more tomorrow on the reason i had to pull it tonight.



ryan

[Dieselwrencher]

No need to ship it in a hurry man! Believe me you wouldn't be holding me or it up. Thanks, PM coming.

[Dieselwrencher]

Making a little progress on the pumpkin. Starting to get turbos on this thing.





I took apart one of our 241DHD auto tcases, and converted it to 5 speed. I then placed it on the transmission to see what it looks like. I think it'll work fine with some work.

[pickup67man]

I'm still new to the diesel game. How much heat comes off the turbo when your egt gets high. The turbo seems a little close to the fiberglass hvac box. Love the build, wish I knew more about custom diesel building for my suburban.

[Dieselwrencher]

Originally Posted by pickup67man

I'm still new to the diesel game. How much heat comes off the turbo when your egt gets high. The turbo seems a little close to the fiberglass hvac box. Love the build, wish I knew more about custom diesel building for my suburban.

Usually while regular driving exhaust temp gases are around 500-750*. While towing they are usually from 750-1150*. (The reading is taken before the turbo in the exhaust manifold, and usually is 250* less after the turbo.) On this truck I'm going to guess it will see 1200*+ bursts when I get bigger injectors. On my F-350, which I DD and tow with constantly, the turbo exhaust housing is literally 1/4" away frm the HVAC box, and it hasn't discolored or melted yet. (I've put about 30k on it in a year too.) This pic isn't very good, I'll get a better one tomorrow. If it gets too hot for the HVAC housing, I'll put a turbo blanket on it.

[ryanroo]

i sure am glad you are making progress because i am at a dead stop. DD blew a head gasket thursday and my jeep is having EST issues. jeez...

that t-case looks all confused, but it looks like you should be able to fit 5" tube through there pretty well.

i bet the HVAC housing doesn't even blink. a 1/4 of air is enough to really insulate the heat. if the exhaust housing on the turbo starts to glow then it might melt that sucker but if that is the case i think you have bigger problems.

looking good sir

Ryan

[jbclassix]

TurboS? I like what you did with the T-case. Are you just going to plumb the oil pump externally for it?

[mcbassin]

Hey hey, nice progress Ryan! glad to see you wrenching on this thing again.

[Dieselwrencher]

Originally Posted by ryanroo

i sure am glad you are making progress because i am at a dead stop. DD blew a head gasket thursday and my jeep is having EST issues. jeez...

that t-case looks all confused, but it looks like you should be able to fit 5" tube through there pretty well.

i bet the HVAC housing doesn't even blink. a 1/4 of air is enough to really insulate the heat. if the exhaust housing on the turbo starts to glow then it might melt that sucker but if that is the case i think you have bigger problems.

looking good sir

Ryan

Thanks. Sorry to hear about your vehicle issues. I feel your pain. my F-350 has wanted a part a week some times. I guess it's mad I spend more money on the Longhorn now. Hopefully today I can get the primary turbo mounted and I'll show the pics of the problem area.

[Dieselwrencher]

Originally Posted by jbclassix

TurboS? I like what you did with the T-case. Are you just going to plumb the oil pump externally for it?

I was actually thinking of trying that and putting the pick up in the drain plug port. Too bad I already sealed this case up. It was supposed to go on my brother's dodge, but he's letting me use it for now until I get our other one rebuilt for his truck.

[Dieselwrencher]

Originally Posted by mcbassin

Hey hey, nice progress Ryan! glad to see you wrenching on this thing again.

Thanks, I'd like to get this thing in as little pieces as possible soon. Is that possible?