Competition how many 600hp singles turbo'd

[Sled Puller]

With 550, I can only put myself in a posistion to win, in the midwest. Meaning, I have to count on the other guys to make mistakes. Muncie was a perfect example.





My point, was, a single charger truck that blimps over 600 on a dyno, I can crush with mine on the street, at that wimpy 550. (which was a spike, 500 true hp is more what I have)



Towing with twin chargers and a proper cam is like night and day compared with single chargered trucks.



Several guys are putting down 500+ with Piers HX-40s, on the dyno. But they can't come close to using that in an extended tow situation. The nitrous guys, well, can you imagine putting the nitrous to it up a long mountain? Yikes!



That is what is really funny about Mitchell parts- the competition wants you to believe they only build pulling trucks. The truth is, trucks that Hot Shot everyday leave that shop with twin chargers, twin disc clutchs, and big cams.



A single charger that is large enough to let the engine breath, with a heavy shaft to help it live, and variable pitch would work well for towing, but they aren't cheap either.

 

[Roger rodbolt]

Originally posted by Sled Puller



I can't believe anyone would even consider going much over 450 with one turbo, what a waste.

Hey Gene,

Here in the Midwest twin turbo sledpulling pickups are bumped to the tractor class--four wheel drive with duals that pivot in the middle and weigh 10 ton or more... .....

Larry



Just so there is no misunderstanding, Sleddy has experience with his generously fueled and air challenged 12 valve engines. Even though our 24V engines are sized 5. 9 and have a Cummins valve cover they are very different then their 12 valve cousins. The ISB's flow more air (stock block vs stock block) and more efficiently burn fuel with the VP44 (and various electronics) which means they can run a little less boost to maintain egts, more effectively spool a single turbo and smoke less at the same hp level.



I'm having a great time running over 450hp with a single turbo. I've never removed the head to replace the gasket or needed to lower the compression ratio, port the head, oring the block, install larger valves or invest in studs for the head or main bearings. I did sell my HX35 to help fund my larger single turbo and invested the remainder of the four thousand $'s in corporate bonds . My B-1 does real well towing my trailer in full race trim, I've yet to be seriously challenged on a steep hills but a set of twins blowing 90 psi of boost with low drive pressure would surely do me in, as I lift to maintain 1300 degree's or xxx mph :-laf :-laf.



Now I would in no way put down twin turbos or 12 valve engines. Enterprise Engine has a ton of experience and does a super job with 12 valves, twins and big power, if I had a 12 valve I would follow my friend Sleddy and put Mr. Mitchell on my bigtimeChristmas list. For now I'm watching the development of twins for our properly valved engines and when I believe there is a compound setup that will spool with the same or less lag, run more boost with less drive pressure and tow my trailer to interstate (or warp) speeds, I may have to cash in those bonds!! HVAC may already have the recipe??? but I'm still waiting . Seriously, compound turbos have to be the best for serious engines, maybe three turbos are even better then two , but don't discount a good single for several ponies and smiles per mile . Larry

 

[Sled Puller]

Larry,

Mitchells have been putting cams and twins on 24 valves for some time now. Take the plunge!



Generously fueled? I don't even have black smoke! It is light gray. Have to fix that.

 

[HVAC]

Here you go Larry-

 

[Roger rodbolt]

Gene,

You are right, I have not asked Dave about 24V twins... ... ... .



HVAC,

Sweet temptation! Beautiful setup, do you know how much polishing my engine compartment needs to deserve those? . Larry

 

[F8LDOSE]

I'd love to be allowed to run twins, but in my class it's singles only with two bolt on's allowed. It's mainly a gasser class, about 35 of them and myself and one other stock CTD. If i ran twins i'd be stuck in the 6800lb class with the blown alcohol 600+ inch big blocks. no thanks. so it's a single or nothing.

 

[Jim Fulmer]

So the questions is... ... how many will have Twins in the new year! Larry, I hear what you are saying but like Gene I just love them to no end, and look were Nowell has gone with Twins in what 6-8 Months? This time last year I was thinking how nice it would be to have a DTT transmission, now I'm thinking how nice it would be to have a Piers pump! Man this is good stuff just need lots of money



Jim

 

[HVAC]

Been Twinned For A While

Jim, to be accurate I built my first set of twins nearly two years ago. I got a few long long looks when I showed up for May Madness last year. I think I even took my mentor, Lawrence of DD by surprise



I then revamped my turbos and went to a different configuration.



Later I revamped again to try to get a better working combo of turbos and finally succeded last summer.



I've been pretty comfortable with the combo I run currently for over a year. We have continued to experiment, just not on my truck. The pic above is CSutton's truck, and the one I have attached here is MADDOG's.

 

[Jim Fulmer]

Dang, I didn't realize you had been at it that long, I really wasn't sure as all I had to rely on the the internet, you have definitely paved the way and continue to do so the with the current combo, keep it up!



Jim

 

[Sled Puller]

Originally posted by hufnpuf

I'd love to be allowed to run twins, but in my class it's singles only with two bolt on's allowed. It's mainly a gasser class, about 35 of them and myself and one other stock CTD. If i ran twins i'd be stuck in the 6800lb class with the blown alcohol 600+ inch big blocks. no thanks. so it's a single or nothing.

Go up, you can beat those guys.

Go get'em!



Larry Crawford has proven the B-1 in pulling single turbo. At those levels.

 

[KLockliear]

Originally posted by Sled Puller

X hp is not Xhp on the dyno jets. I gained 41 hp by spiking it. I think the massive tq load on the 'Jets mess them up.

True, the Dynojet's can be inertia spiked, but that's pretty obvious if/when it happens. HP is made in curves, and a spike would be outside of this substantially. This is why the "PEAK" number is not always the true number, but easy to see on the printout.

Originally posted by R. E. Miller

Correct me if I am wrong, but I think I saw a HX-40 on the Diesel Dynamics truck.

Yeah, depends on the power level of the truck at the time. Up to about 525hp, the HX-40 works great.

Originally posted by Sled Puller

I can't believe anyone would even consider going much over 450 with one turbo, what a waste.

I also agree that more power and better EGT control could be attained with twins over the 450hp mark, but not everyone wants to spend the money for them. If you look at it from the other side of the coin, since we agree that more power can be made with a twin setup, just think of where the high HP single turbo trucks COULD be with a twin setup.

 

[Sled Puller]

Originally posted by KLockliear

If you look at it from the other side of the coin, since we agree that more power can be made with a twin setup, just think of where the high HP single turbo trucks COULD be with a twin setup.

Yep Keith, I KNOW where they are at! In the midwest!

 

[HVAC]

Twins

I guess my truck would be an example of that too.

 

[Roger rodbolt]

Question for Kieth, Nowell and Jim Fuller

Originally posted by KLockliear

If you look at it from the other side of the coin, since we agree that more power can be made with a twin setup, just think of where the high HP single turbo trucks COULD be with a twin setup.

I'm still running the original and unmodified VP 44 with dyno readings from 500 to 550hp, the last two were 533 and 534, but I'm running out of ideas for pushing more fuel. My question would be how much additional horsepower would a good set of twins add over the B-1 and present setup. I know that I could convert to a P7100 and already have most of the parts to do the conversion, but I'm still pushing the VP44 for it's limit (or life). Oo.



Thanks in advance for your numbers/opinion. Larry

 

[Johnboy3]

HVAC

HVAC, have you had your truck on a dyno lately? From your 1/4 mile times, you must be 700ish. All on straight diesel too, very impressive.

 

[CUMINNTSTRKN]

larry



it seems around 500rwhp is all any of us have ever made with a single charger with a vp44. dd is the only people i know that have made 580rwhp with a single. they did that last may. now with twins over 600 is possible. and i can honestly cool 500rwhp while towing. ee twins work very good, they have been around longer than anyones, although they have been copied by others, i feel they are still the best.



jim

 

[HVAC]

Horsepower

Johnboy, I did dyno recently. However it was abbreviated when a hose blew off. But based on my results I am at 660 to the wheels give or take. Truth is my boost has gone up a few pounds at the last race event. The calculators show me over 700 when I use a weight of 5900#. That's just diesel like you said.



I'm quite pleased with our progress, especially the new trans. We'll get that CLEAN 11. 9 time slip before we shut down for the winter.



Roger, I used (last year) to run the same hp you are on fuel. In May I dynoed while in Vegas and hit 601. The big difference? Properly working twins

 

[Roger rodbolt]

Thanks Jim and Nowell,

I appreciate the info. Good twins are more efficient. I am clearing nearly all of my smoke at full boost but it's tough to get cool air and high boost #'s with a single charger.



May be out of commission for a couple days, as I've got an appointment with a surgeon early today. Later, Larry

 

[CUMINNTSTRKN]

larry



i hope everything works out for you at the dr.



jim

 

[Wirenut]

Somebody needs to explain to me how the twin setup works It just looks like one big conglomeration under the hood to me. If I actually understood what was happening there, I might like the idea! So how do the twins sound? much different?