Engine/Transmission (1994 - 1998) Twin turbo set-up?

[Garry Verheyden]

Hi Bob,

No,not with LL anymore but still in the business. I'm now brokering through 19 companies. How about you ? I'll be at BD's dyno days on Oct 27 ,lets meet there if you have time or call me (number is in the book)

Garry.

 

[DBR]

I would think that the addition of air alone to the combustion chamber itself would not increase power, but the opposite and be parasitic. That is assuming you already have adequate air to provide complete combustion. The benefit of the twin turbos is its ability to produce more air than a single so additional fuel can be added and still maintain combusted efficiently. From my readings on the TDR it appears to that a significant numbers have over fueled their truck, (me included) which is evident by the high EGTS that are being reported. This is assuming one abides by a 1300 egt maximum limit. I have produced over 400hp, but was not able to maintain that during towing due to high egt and concern for my engine. My trucks present fueling has been dynoed at 315hp and within the 1300 maximum egt. (before hx40). I hope that with the additional air flow I will be able to slightly increase fuel and shoot for a 1250 max egt under sustained towing conditions. My goal is lowering egts and smoke more then increasing fueling.

 

[HVAC]

3rd Generation Twins

Adam, you know some of the same people I do. Hehe I was at Bell Turbo yesterday and Pius shook his finger at me and said you just bought a [CENSORED] turbo! I admitted that I had. I asked him how he knew (I already know he knows the people I bought it through). He said, "I knew about it ten minutes after you hung up with them"!

You gotta love Pius in a strange sort of way



Well, your right. I just put in a couple 16 hour days to get my third generation twin turbo system running. It's the best combo I've run on my truck to date.



See ya in Tulare!!!

 

[HoleshotHolset]

sewman: DBR said it best in his post.

The 'more fuel + more air equation' holds true for every internal combustion engine. But the ratio of fuel to air must be just right otherwise we end up running off the ragged edge of the safe EGT zone... . and blowing a heck of a lot of smoke.



Matt

 

[Roger rodbolt]

Dual parallel HY 35's?s

DHofeldt quote "I have been toying with the idea of running two hy-35 in parallel. Has any one tryed this,could it work?"



I've had similar thoughts, the hy-35's might make a good play truck with large volumes of cool air at lower boost. I don't have access to the hy-35 or I'd be inclined to scratch build a split manifold and try it. Anyone have experience or suggestions??



My current plans are to put a HX 40 compressor in a HX-35 with 14cm wastegated housing on the engine to a well used H2E with huge housing (staged) and try to limit boost to 65-70lbs.



Adam (MY6EATSV8's) your "castoff" McCleod clutch is holding great after modifications on my ISB, I need one for the 12valve I'm building. Do you have advice on the '94 with 215hp pump, 370inj, marine headgasket, stock cam and pistons. . for twins turbos and 500hp+ on #2? Will the hybrid/homegrown HX-35 to H2E dual setup deliver

 

[Animal]

Re: Dual parallel HY 35's?s

Originally posted by Roger rodbolt

I've had similar thoughts, the hy-35's might make a good play truck with large volumes of cool air at lower boost. I don't have access to the hy-35 or I'd be inclined to scratch build a split manifold and try it. Anyone have experience or suggestions??

I was thinking down this line also but I’d use a HY35 feeding a HX40 w/16. I’m only looking for 400-450HP with no smoke. I’d use a Y with a wastegated valve allowing all the exhaust to feed the HY until about 20lbs boost, then the valve would open to split the exhaust gas between the two with the HY’s exhaust gas also feeding the HX40 as in a standard twin turbo setup. Now all I need is a HY turbo and TIME, which I don’t have.

 

[MY6EATSV8'S]

I'm really glad the clutch is still going I felt bad it wasnt' totally up to snuff when you got it and I appoligize.

As far as twin for 500hp, right now Nowel has probably the best setup going on the left coast. Call Bell turbo in Stockton CA. and tell him you want a 500hp twin setup. I'm working with him to get things sorted out and finally have things close. Nowels is real close to what I had wanted but I thing his housing may be a little slow for my personal preference. It should be good for 500 to 550hp.

As far as no smoke twins, Eric Mcbride has some of the fastest spoolup(s) I've seen and has been working just fine for a wile now. h2e/hx40 combo.

 

[HoleshotHolset]

I'd be interested in hearing more about this H2E/HX-40 setup... ..... I think this is the way I want to run my twins.

 

[HVAC]

Twin Turbos From Performance Diesel

#ad




This twin turbo setup is the best one I have built so far. I'm still testing it and on the 28th of this month I will be drag racing at LA Co. Raceway. That ought to put it to the test, don't you think? I hope to offer the finished system as a kit once the R & D is finished.

 

[Bad340fish]

Good Work Nowell

If it works half as good as it looks you will be doing pretty good in my book.



Would there be any benefit to injecting water in between the two turbos. That way the temps would be cooler entering the second stage before being heated up again and sent through the intercooler.



I was recently on Jury Duty(yawn) and poked through a turbo book since I had plenty of time on my hands. There was a 3 stage setup in there that used water in between each stage. used 3 gallons of water per minute. And was capable of pushing 250PSI!!! I bet you can watch the head try to lift off of that thing



Clark

 

[Roger rodbolt]

Nowell, that quite a setup!

Wow, the lower turbo brings spandex to mind. Nice job and let us know how it performs. Frankly one of your 'ole castoff twin setups would work for me??

 

[MY6EATSV8'S]

I think you could benifiet from water injected between the stages for gas expansion reasons only, meaning I wouldn't use them in a every day driver type system. That is the system I am after. But I am not your every day type exteam driver( or something), or at least I like to drive on the fast side. My girlfriend says I'm like a shark, always looking for someone to race.

 

[HVAC]

Twin Turbos

QUOTE:

"If it works half as good as it looks you will be doing pretty good in my book. "



I appreciate your kind words. There are many very custom one of a kind pieces that I won't itemize. There is one piece that took around 5 hours to fab all by itself.



QUOTE:

"Nice job and let us know how it performs"



Again, thankyou for your support. I happened to be going to a "Ram Runners" club meeting tonight and on the way back I was enjoying how the turbos sounded and responded (better then prior setups), and so I jumped on it a bit. So far I've been tenative since the last connecter hose blew at 34 psi. Well this may be progress of a left handed kind. I made it to 43 psi before another hose blew tonight. I should add that this is without anything on. No fuel box, no LPG, no Nos.

 

[Bad340fish]

Hoses

I saw a 8 Second Buick GN with a twin turbo set up last year that had a very good idea on the connectors. They had the standard hose and hose clamp but on each connection there was 2 straps. They had welded tabs/brackets to each tube so they could attach a metal strap to connect the tubes. That way those hose clamps only have to prevent leakage. The straps hold it all together. Might be worth a shot.

Clark

 

[HoleshotHolset]

Being a gasser racer too... . I can attest to the straps on the IC (intercooler) pipes as well... .

Anything running over 20psi should consider them.....

I have worked on an 8-second GN with one Garrett T-96 that made about 45psi... man what a car!



Matt

 

[DBR]

Havac:

Thank you for the tips, I appreciate it! I have to comment on how clean your set-up is, Nice Job! Does it ever rain in California? Your engine compartment is to clean.



MY6EATS8'S

Thank you as well on you comments. Are you at liberty to provide more detail on your present turbo? Sounds very interesting.



Well just an update on my lack of progress since my last post. Due to some "Process Induced Opportunities" at the plant (my place of employment) I've been on extended hours, and night shift no less. So here is what I've been able to complete:



Exhaust: The piping has been fitted, welded out and is in place. I was able to use the down pipe for the hx40 surprisingly enough by shorting the center section and moving the v-clamp adapter back a 1 1/2" . I was very happy on how this turned out, far better fit than I had originally anticipated. This portion of the set up is complete.



Oil supply Lines. Finally collected the proper fittings and seals from Chrysler and had the local hydraulic shop fabricated the supply lines. This portion of the set up is complete.



Secondary turbo waste gate: Had to modify the waste gate actuator bracket to provide clearance and proper clocking. Not much needed, just had to weld up two sets of holes, re-drill in a different location and re-weld the waste gate arm. This portion of the set up is complete.



Primary turbo waste gate: Have the waste gate actuator bracket cut and tacked out, just need to weld-out and install.



Cold side piping: Cut the cold side piping to improve clearance at the alternator. This is presently tacked out and waiting to be welded out.



Oil return line for 2nd turbo: Have gathered all the necessary tubing to weld out a new return line into the oil pan, just need the time. Funny thing though the 7/8 tubing for the return line only came in 20' lengths (exchanger tubing). I'll be able to make several mistakes before running low on tube. A good thing!



Oil return line for 1st. turbo: Not sure at this point if I'll have to fabricate a new line or not. I'm concerned that the stock line will interfere with the intake hose to the air filter box. I'll worry about that later, not a show stopper by any means.



I'll try to get some pictures taken here in the next couple of days if time permits. I'm pretty pleased as to how well the fabrication is coming, I'll be rather bummed if these two turbos don't work well together, at least it will look it should





Thanks to all that have emailed as well.



DBR

 

[HoleshotHolset]

Why isn't anyone using an external wastegate? (like a Turbonetics, Inc. "Racegate" or an HKS, etc..... )



No wastegate actuators to worry about and then you don't have to worry about the exhaust gas that is being bypassed interrupting the flow out of the exducer section of the turbine housing. You can even control boost from inside the cab with a very simple control knob... . Best of all... . they sound really cool when you vent them to atmosphere!



Turbine housings that do not have an integral wastegate are also physically smaller, and less restrictive (usually).



That's my $. 02 worth.



Matt

 

[MY6EATSV8'S]

DBR, without giving up everything its an h2e with a 12 housing.

the good part of this is the h2 has a high p/r so it doesn't go off its map until 48psi, it also has a 1mm bigger shaft than a hx40. Its way faster than my hx 40 was and I can maintain 35psi @1300 degrees. Its a great 400+ hp single turbo.

 

[Bad340fish]

Holeshot, sure your not thinking of Bypass Valves?? A wastegate vented to the atmosphere sounds like a gorrila Fart on a 6 cylinder motor lol.



You can make these wastegates adjustable from in the cab for around $50. I didn't do it on my truck but I had done it with my Conquest. I melted lots of sparkplugs trying to get it to be the most proportianal. My conquest had the same style WG as the Holeset.



This Twin Turbo stuff is cool

Clark

 

[HoleshotHolset]

Whatever you want to call them, it's a wastegate to me.

Does the same thing, but only goes about it in a different way... that's all.

I too have experience with turbo gassers... . as a matter of fact one that I work on a bit here and there went 10. 97@124. 7 this past weekend at E-Town in NJ... . not bad for a 3600# truck. This particular truck has an HKS wastegate on it, and it doesn't vent to the atmosphere..... but it still sounds cool!



What sounds 'weird' to one person is music to another.



Matt