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hot rod 6.2 diesel.

I found some header flanges. The header idea is to place the turbo low and forward on each side. I've got a moch up engine i will be building it on while my block is in the machine shop. All I am looking for is hood clearance. I have worked out how to keep my alternator and power steering pump on the bottom sides of the engine. Leaving to top side of the engine clean. I really want to explore a placement that faces the output of the turbo forward. Instead of the standard in towards the center. It will certainly cause an issue running the down pipes. I see that coming even imagining it in my head. Might be a fools errand.
 
This is bad ass, I have similar goals as well, @KirsL touched on the drive pressure limits. The guys over at diesel place have tons of experience with his motor and from what I can tell it's seems to do pretty good as long as you don't try to shoot for more than what you stated for hp levels, for some reason I thought the h1c was a lag monster?? I would almost try to find two he351cw turbos they are a hx40 compressor and a turbine that's smaller than a hx35 so it actually spools too fast with 8 cylinders feeding it. I think the turbine wheel is 59cm/62?? Don't quote me on that but it should be really really good for twins and is the most efficient design so far compared to the hx35 and will net you more low end torque without dying on top.
 
Its more of a starting point than a final result to try the h1c. I'm looking at a wh1c as well. I'm basically looking for the max capacity of about 30 psi combined. Nominal boost... I don't intend to use that much but capacity is what I am looking for. I don't want to work them to desth. Fast spooling and high volume. Needs to be wastegated too for better control. There are a good amount of turbo chargers that fit into that space so it will boil down to what i can get. I have an hx35, hx40 and an h1c out in the shop ( I'm a diesel mechanic). That is essentially why I would start with an h1c on each sjde. The wh1c certainly has potential. I can always Taylor them by hybridizing compressor housings if I need to at some point.
 
Oh ok didn't realize you were using what you had, slap the hx40 compressor on the hx35 so you have the wastegate hybrid..
 
I am looking for others now. Found a wh1c which is essentially a hx35. See if I can find another.
 
Many years back, probably at least 10, there was a guy on thedieselpage that built a twin turbo cucv blazer. I think he had twin intercoolers also.

Remember if you're going to run true twins where the air only meets in the intake the turbos are basically being fed by a 4 cylinder engine. So a slightly smaller one would do ok. Hell you could probably run 2 gm8 turbos and it would run pretty good.
 
After much study and book work I think I am going to start with two td04 turbos. These are very common turbos and tons of 4 and 6 cylinder cars use them. Dividing the engine essentially makes it two 4 cylinders. The td04 is a wastegated oil cooled turbo that will push in the neighborhood of 19 psi per side. Not to mention a fast spool time. Combining the two should give me a good nominal pressure. Controlled with the waste gates. Plus they are relatively small in comparison to gm turbos. Most that I have seen have a 9cm2 housing stock with options for 6, 8 and even a 12. So we have room to run should we need to make a move for more or less.
 
Just had another really good conversation with Heath diesel regarding the use of the TD04 turbos in this system build. Apparently they have worked with them extensively. Offering a turbo master, wheels and various upgrades for them already. They found them to be very much more powerful that I had found specs for. To the tune of 30psi of boost per unit. Now mind you that is much more than I am looking for but it's good to know it would have the potential. It is looking like this engine will take less than I thought to attain the level of horsepower I am looking for. I'm not going to back off on any of the plans I have but might look for more power in the future. Having laid plans now to use those turbos I am looking and researching now for inter coolers. Weighing the option of one large inter older versus two smaller units. I wonder if it would be easier to fit two small units with the space provided.
 
Sounding like a solid plan.

Biggest issue I see with running two intercoolers is having the physical space for two sets of pipes. I'd try to run one large one that way you only need 3 pipes. One from each turbo then a single to the intake.

Here's a picture of mine. It's made from 3.5" pipe (was free so why not) and it eats up a fair amount of room. Just to give you an idea on available space.

20170401_195515.jpg
 
With smaller turbos placed farther forward and higher it should have some extra space. I will also relocate the alternator to the bottom passenger side. In the end I won't know until I get the engine back in with the headers I am building mocked up. I will mock it up in the engine bay of the 84 suburban most likely. Then transfer it in to the 72. I think the engine bay of the 72 is larger, although not that much. If I could find a two into one inter cooler that would be ideal. I won't be using 3" pipe for sure. With the smaller turbos I just won't need it unless the inter cooler has two small inlets and one larger outlet.
 
KirsL said:
Sounding like a solid plan.

Biggest issue I see with running two intercoolers is having the physical space for two sets of pipes. I'd try to run one large one that way you only need 3 pipes. One from each turbo then a single to the intake.

Here's a picture of mine. It's made from 3.5" pipe (was free so why not) and it eats up a fair amount of room. Just to give you an idea on available space.

View attachment 227601
Click to expand...


Random thought as I was researching intercoolers today....

I wonder if using a top mount from a WRX twin turbo could be used? Follow me down this rabbit hole for a second. We could "possibly" mount it on top of the intake manifold drafting directly into the intake some way or the other. If it will fit we could louvre the hood for air flow over it or possibly a cowl induction hood? Surely using two TD04 turbos the stock intercoolers from the same type of vehicle would be sufficient? Might b far fetched a little but I bet it would work. The WRX twin turbo top mounts have two inlets and one outlet just for reference. In looking at my 82, I have a good amount of room between the intake and hood. Hmmmm....thoughts and ideas get me in trouble.
 
Vombrown said:
...thoughts and ideas get me in trouble.
Click to expand...
The best kind of trouble.

Also, I prefer air to air mounted out front, but that's me. Be original. Give it a roll.

David
 
Oh I agree having one out front would be the most efficient. Now then in looking at the top mounts there is a good selection of dual inlet single outlet. Long way off to needing it but I think it would work.
 
It's both a good idea and is doable. Give me some time to look for it but I recall someone doing the same thing to a 90s 6.5 suburban.

There's a guy on thetruckstop.us that put a air to water intercooler on his Tahoe with it top mounted. He's had pretty good success with it. Heres a picture of said truck.

image.jpg
 
I have always shied away from water to air. I've only seen one fail mind you but when it did it was catastrophic.
 
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