Ok guys, I have had a brand new HT3B sitting in the garage for over 2 years now and need to get the thing on the truck. I am finally getting to a point financially that I can afford to put some money into the beast again. Please help me form a game plan...

Clutch is South Bend Con OFE
NV4500 Tranny
Axles, brakes, and all other moving parts in great shape'

Motor is a 1991 non intercooled 9mm head motor with 61k miles.

I have a head off a 93 that I am planning to take to a local machine shop for 60# valve springs, full service with some porting, and o-ring.

I am currently running a H1C with compressor upgrade and 12cm WG housing (divider drilled)

Here's what I am looking for...

1. pre-made hot and or cold pipes, anyone know a source?
2. Good source for head studs
3. Good source for replacement carpet

Thanks for any help in advance

 

i know pdr diesel makes twin turbo kits for the i/c 1st gens might be able to buy just the tubing

 

Thay ain't into it, I've asked.

Try here ~ http://www.sourceautomotive.biz/inde...id=23&Itemid=1

 

Talking about that PDR kit . . . .

They use a hot-pipe that I've come to understand is apparently a stock/OEM item on the Cummins "N" series engine. (Someone correct me as needed). It comes with the HX40 size inlet.

It's called the "Cobra-Head", err sumthin . . .





I used it for the simple fact that, from what I've seen, without some thoughtful fabrication using the standard 90* ELL, the hot-pipe assembly has the primary far enough back that some serious adjustment/movement of the firewall is needed. (Others with more first-hand experience there would know best). The Cobra-Head tucks things a little more forward.





Some might suggest the downside might be that the primary's feed-pipe (from the air filter) is up against the oil filter.

Even then, the exhaust down-pipe needs to turn down first thing . . .




Hope this helps.

 

source automotive was going to make a first gen kit but it hasnt happened yet. i dont know what you could do as far as a hotpipe goes but you could probably do your cool side tubing yourself. the last time i talked to rip he said they picked up a first gen for research and development so we might be getting some cool stuff to hit the market in the near future.

 

Just talked to Rip, they do have a 1st gen, but they are currently working on exhaust and have not made it to twins yet. He also no longer has a flange for an ht3b. He is looking to see if he has any blank s400 flanges (center cut but no holes drilled. We'll see what I end up with. any other suggestions are very welcome at this point

 

David, thanks to a little research from you post, the part number for your "cobra head" is 3927862 and my local Cummins dealer has it for $205. However, yours has been modified with a lower flange. The cummins piece just has a smooth pipe section at the bottom, looks like it is supposed to attach to flex exhaust pipe or something. I am currently trying to see if they made a 3" cobrahead

 

i think there was a coulpe of those corbra heads in the classified with the smooth ends

 

Yep, Bill had 1 new one and a used one for sale

 

I'm pretty sure the PDR cobra pipe and the Cummins cobra pipe that I've sold in the past are two different pieces. Not saying the PDR piece is not a Cummins part, just not the same as the cast iron Cummins one I've sold.

I'm pretty sure I have pics of some of the steps through my twin turbo build up. For my hotpipe I used 3" schedule 40 weld elbows. A chop saw and a tig machine did the rest. For the hx40 flange, I bought one from Scheid. For the s400 flange I made one from mild steel. The cold pipe is 4" aluminized exhaust tubing. Everything was bought locally. I did have to buy the 7/8" silicone hose for the oil drain online and most of the clamps online.

I think it's been shown that even the advertised bolt on twin turbo kits for 1st gens are not bolt on.

 

I am really just looking for a pre fab hot pipe.... If I would just quit whining and do it, I'd probably have twins already, lol