Twin Turbo Parts Links and advice

[ellis93]

I'm starting to ponder on doing twins on my truck and I have no idea were to start looking for parts to fab up into piping. What I'd like would be to get some of you to post up where you bought your materials.
I would also like to ask if I could get away with my current fuel as I want to keep this truck working and towing. If not what would be the smallest injector I could get away with. Another fuel supply is already ordered, AirDog, along with trans rebuild parts.
If I can find the parts and pieces cheap enough then this winter I'll have my truck in a million pieces. Thanks for any info in advance.

Oh ya HT3B and my current turbo.

[AHineman]

I'm not sure why you would want to go to all the trouble of twins but keep your stock(?) fueling.



But if you do decide to build a set...

http://sourceautomotive.biz/1994-2002dodgecummins59l-2.aspx
For oil lines, flanges, etc.

http://www.intakehoses.com/
For intercooler/silicone boots, etc.

http://store.airflo.com/
Mandrel bent exhaust pipe.

http://www.mcmaster.com/
Sch. 40 pipe.

[ellis93]

Well I want to see how it does pulling and how low I can keep my egts. If I need more fuel is needed,I'm not opposed to installing some injectors and twisting the fuel screw. I'd just like to do this in baby steps.
Thanks for the links

[BC847]

How far do you want to pull the sled?

[ellis93]

I work this one. Average 14 to heaviest of about 19,000. I pull this kind of load fairly regular and I've had to pull some tall hills lately. Get tired of watching my Pyro climb.
I guess I should have never asked Mr Richie why his truck got so hot when mine didn't.

Basically I'd love to add some more power without sacrificing dependability and causing heat problems. It been elusive on other vehicles I've had and I'm looking for advice on the best possible combo.

[ellis93]

Would these work for a twin set up and let the truck still work. http://www.thoroughbreddiesel.com/dynom ... 93STG2.htm

[SNOOT]

You might get rid of the EGT issues but you will be watching your coolant temps after the twins pulling hills.... Just saying..

[ellis93]

Snoot, this is the kind of advice I'm wanting. What have you found with your set up, which is very clean.
I got to digging around and found this, http://www.cumminsforum.com/forum/89-93 ... its-2.html
Yours and BCs are nice set ups.
AHineman, Snoot and BC847 ,if can, could ya'll tell me if I'm just wasting my money and time with this. Yes I want a little more power but I want to use it for hauling purposeses, not so much for play.
Ya'll can give your honest opinions, I'm a big boy and my panties don't twist easy

[dazedandconfused]

Snoot, this is the kind of advice I'm wanting. What have you found with your set up, which is very clean.
I got to digging around and found this,
Yours and BCs are nice set ups.
AHineman, Snoot and BC847 ,if can, could ya'll tell me if I'm just wasting my money and time with this. Yes I want a little more power but I want to use it for hauling purposeses, not so much for play.
Ya'll can give your honest opinions, I'm a big boy and my panties don't twist easy

I've looked into having a nice aluminum radiator made to keep engine temps down myself. I think the stock ones are way undersized and the aftermarket replacements stink. My questions is how much different is a 2nd gen radiator? Would it fit without major issues?

[Tacoclaw]

While I don't have any real experience with twins, I wouldn't personally put a set on a truck I work with. With all their extra oil lines, silicone connections, and V-band connections, it's a lot of potential complications. That's all you'd need is a return line leaking while you're towing one of those 19k loads up a mountain.


I'm sure heat-soak in the engine compartment could be controlled in the engine bay with large amounts of heat-wrapping, but that's that much more expense added on.



I'd personally just try to find a nice combo of big Intercooler, efficient turbo(single, and not just a H1C-based addon, there's been a lot of development in both intake and exhaust sides of turbos in all this time), and efficient injectors.

[AHineman]

I've never towed anything with my truck since the twins, etc. but I agree with Levi's ideas of a good towing setup. If you make a whole lot of power and tow a whole lot of weight...I'd say you could end up with a whole lot of broken parts. I do think a twins truck could be done up right to tow well, but you'd find all of the weak links. There are a lot of power upgrades in between the setup you have and a twins setup with all supporting mods.

[ellis93]

. There are a lot of power upgrades in between the setup you have and a twins setup with all supporting mods.

what are they? The turbo I have seems to do a good job, makes 27 pounds of boost off of stockish fuel setting.
If I turn in the fuel screw that would make it worse, right?

[AHineman]

You could run your fuel screw in some and be fine. Have you installed a 366 spring yet? A mild set of injectors, a Holset super 40 or a 62/65/14, 336 spring, pump tuned to match, full 4" exhaust, combined with what you already have would be a fine towing setup IMO. If you have money left over, add a nice intercooler to the list.

[Tacoclaw]

The turbo I have seems to do a good job, makes 27 pounds of boost off of stockish fuel setting.
If I turn in the fuel screw that would make it worse, right?

I've had to pull some tall hills lately. Get tired of watching my Pyro climb.

Sounds like it could be doing better.



As has been said many times before, it's not all about how high the number gets. I would think a well ported head, CAI and charge tubes, an HE34(5?)1W, and a big fat external wastegate would be the hot ticket for any HP under 350-ish.

I guess if you don't want to be fighting with adapting on the later turbo, an S300/12 would do, but I don't really trust the internal 'gate on them. My truck seemed to get hot faster when my S300 'gate was hooked up.

:EDIT: I'm gonna go ahead and bold the most important thing I think we're missing on our trucks. My cousin's 24v barely ever breaks 1000*, no matter what load he has behind it. and consider those trucks all run a 12cm housing, through a 3" exhaust, with a crappy stock WG.

[SNOOT]

The innercooler being larger with twins may help but really not needed with twins as your air is much cooler then running a single. I would look at adding additional cooling capacity. Larger radiator, larger capacity like a reservoir with 2-3 more gallons of water in the system or better fan.

As for being reliable. I have had my set-up on for over 2 years and just had my first problem last week. Developed a crack in my hot pipe that I welded up in about 1 hour. No oil leaks or boost leaks at all.