Engine/Transmission (1998.5 - 2002) What would be the best turbo????

[bsappington]

From what I understand my options are very limited. Becuase of the BD exhaust brake I can either go with a PDR HX35 or a Banks quick spool exhaut housing. I am not sure either of them are enough. Judging by what is in my signature I am looking for advice.



Thanks,

Ben

 

[rweis]

Check with HTT, they have a lot of options in turbos. I am about to have mine rebuilt with them.



Bob Weis

 

[Boondocker]

Check with HTT, they have a lot of options in turbos. I am about to have mine rebuilt with them.



Bob Weis

Bob,



I'm very curious as to how you're specifying your turbo rebuild, since we have similar power adders.

Are you starting with an HY or an HX?

What size compressor housing? (35/40 hybrid?)

Wastegated or not?

Silencer ring?



IF you don't mind my asking.



Thanks,

Neil

 

[bsappington]

I just got off the phone with HTT and it appears that the 60/14W HX35/40W is the best bet with the waste gate.



I am just wondering if it is worth the money. From what I understand it will not boost any higher than what I have. It will just be more effeicent by 200CFM.



So far I am leaning this direction over the PDR HX35.



Any other opions?



Thanks, Ben

 

[rweis]

Well,



About 4 years ago I sold my HY for $350 (someone wanted to use it in a twins package) and bought a KSB1-B (S300 frame). I did not go to the hp range I thought I would, and it has been really laggy. I do not need any more hp and I am at about 100k now and want to rebuild it to a HTBG or HTB2 12/60 or 12/62.



They said they could rebuild it to a HTBG or a HTB2. They are going to rebuild the center section and then change the front end and back end. I have not sent it in yet. Ship date is early October ( I can get a free loaner for a week from a friend of mine in October).



Bob Weis

 

[PC12Driver]

With big tires, tall gears, and an auto, I'd keep the turbo as small as possible. How bad are your egts now? How do you use your truck?

 

[bsappington]

I agree that with the tall gears and big tires the turbo should be on the smaller side. I was told the stock HX35 flow only 600CFM. The HTT HX35/40W

flows 800CFM. I was speaking with HTT today and he told me that there probably would not be that much difference between the 14cm2 and the 12cm2 housing, however 12cm2 would most likely be better.



He also told me that with all of the fueling I have that I should probably go for something bigger. Apparently this is not possible without changing my exhaust brake. I am not ready to put that much money into it. If I go with a bigger turbo then it will cost more plus another $500. 00 in a mid-pipe exhaust brake.



I mainly use the truck as a daily driver. I tow a car trailer and dump trailer on the week ends and we have a 14,000lbs travel trailer every once and awhile. I also have been running on biodiesel that I make from a processor in my garage. I notice that when running bio there is a lot of lag in the turbo. This might be another reason to stick with the samller housing.



I was thinking if I buy the whole turbo with a 14cm2 housing and I keep my own that I could change the exhaust housings to find the one that works best with the bigger compressor.

 

[Eric Lee]

I just upgraded my upgrade - First I swapped the stock HY35 for a PDR HX35 and reciently installed a HTT HTB2 62/12. The truck works so I wanted to make sure I didn't over do it. With an empty 5000# gooseneck running 80/2100rpm she held 1000 deg and 15psi - I didn't use the cruise but it bet it would of have worked. That was also a concern - whatever turbo the cruise had to work smoothly - and it does with the HTT 62/12 - never runs up on itself.



I think one of the biggest differences from the PDR Hx35 to the HTT turbo was going to the 4" downpipe. I measured the exhaust elbow on the HX and it's smaller than 2. 5" exiting the housing. The HX40 down pipe is 4" right out of the turbo and has it's own smooth bend instead of a cast elbow. The only part of the swap that didn't go too easy was the oil return pipe - it fell a little short of the block so the short piece of rubber hose that connects it to the block had to be stretched to jog over a tad. I think if the pipe was extended one inch it would work a little better. I also had to trim the rest of the exhaust back a little - good thing cause it gets a little buggered removing the stock downpipe.



- Eric



I like it - the EGTS are much more controllable under moderate to high throttle and it spools fast - as fast as the HX.

 

[Don Tanklage]

I think one of the biggest differences from the PDR Hx35 to the HTT turbo was going to the 4" downpipe. The HX40 down pipe is 4" right out of the turbo and.....



- Eric

wonder what would happen if one was to machine a flange and make a down pipe that was closer to the size of the turbine and then step the system up every foot or two as it goes back? i know that 4° tubing flows better than straight tubing but these trucks are too long for that! what about a step system? how do you think it would work?



a 65mm turbine is only 2 1/2" dia



don

 

[darkhorse]

How about the Dodgzilla. I used one with a port matched 14 cm housing.