Hello y'all! I have a Powerstroke for my daily driver (see sig.) but have another project that I'm debating putting a Cummins in. Approximatley what would be needed to get a Cummins to 800rwhp (including any drivetrain upgrades) on #2 only and are there any good Cummins tuners in the New Orleans or Houston area I can call to discuss it with? Thanx for any help!

 

Just send a blank check to Piers or Shieds and thell get ya all your stuff.

 

What he said. Its gonna take a lot. Piers stoopid pump, huge injectors, cam, turbo's, massive drivetrain upgrades, etc. Have fun with it though

Eric

 

I saw Scott put down 839 HP at a dyno day in oct. on a Mustang dyno (probably over 1000 on a Dynojet ) check out his page. I'm sure he can point you in the right direction.
Big Bad Dodge

 

The short answer is "a lot of money."

 

alotta money

its gotta be a 12v for sure...its just not easy to make that power on a 24v

 

Nah, a 24V can do it. It might take a little nitrous, though.

800hp on a VP44 with just diesel is tough, and I don't think it's been done yet.

Though if you built some really efficient twins (read: laggy as heck), I bet you could come within spitting distance.

 

Get ahold of Jim Fulmer. He's putting down 873hp and he drives it daily.

 

OK, I'll be annoying and give you the quick answer: Fuel and Air !!!

 

I think 700 is right around the corner. Although that corner is a long one. LOL

Tim Barber will have some new "stuff" in his hands to help that along soon.

800 with VP44 might be a reality but lets see what the alpha testing shows. 900 with nitrous is a done deal in a few months or less. Just need to get through the holidays and scheduling mess.

An 800 rear wheel HP 12 Valve is a piece of cake, if you have the cash to throw at it.

Don~

 

i believe jetpilot made clsoe to 800 on a vp44 with drugs tho...not sure what he was spraying (propane, nitrous, water meth etc)

im not saying vp44 cant do it either. i just know its not easy...and hasnt been done YET with #2 only.

question for Don M/HOHN- if you are going for that high of a HP its not gonna be a very street friendly machine, so wouldnt a HUGE single be better for making that peak HP or will twins eventually outperform any big single? i know a single would be better in a place like sled pullin because you have all the time you want to spool and "light" it off and get the power up. now obviously for a street truck the twins will be better to bring the lag down.

 

Doug was spraying large doses of N2O.

Twins rule the roost. Your simply asking too much pressure ratio from a single.

Build some twins with a SPS66 and an HX80-class charger. Then you get big air and less lag than a huge single like Joe D's laggy pig that let him hit 799.

Other than complexity and cost, twins have no drawbacks in terms of efficiency, and spoolup vs air delivery. The only reason I can think a big HP guy would run a single is because sleduplling class rules force you to. Other than that, twins are simply not just the BEST way, but the ONLY way, especially on an rpm-limited 24V.

The other key to big hp that no one's mentioned is RPM. Right now, a 24V just can't hang with a 12V in RPM. Heck, it was HUGE news when a Redline box let a 24V rev with fuel to 4000rpm.

The 12V guys just laughed because 5000rpm was old news to them.

Ever notice how even though the HP numbers keep climbing, TQ has sort of peaked out? It seems that more and more guys are getting HP from RPM, not from increases in TQ.

There are more than a couple 5.9s that are putting our ISX-like levels of tq. (1200+).


BTW-- I't hilarious that you ask a question for either Don or me to answer. Why? Because they difference between us is startling:
HOHN: reads a lot and talks more
DON: makes stuff and tests it
HOHN: Thinks something MIGHT be good or something
DON: KNOWS, because he's tested it
HOHN: has a lot of opinion
DON: has a lot of facts
HOHN: gets all info secondhand
DON: gets info firsthand, and only lets 10% of it out

So, don't confuse a forum enthusiast like me (with a mild truck), with a guy who's out there on the bleeding edge, taking risks, and DOING, NOT JUST TALKING.

Ask yourself why I have time to reply to so many posts, while Don is a little more scarce? Heck, he probably dynoes often in a week than I have in my entire life.

jh

 

Yeah, that's what I'm trying to find out. I can get close to 600 - 650rwhp out of a Powerstroke on #2, but if I can get 150 - 200rwhp more out of a Cummins for close to the same price or cheaper.....

Yeah, I'm prepared to spend some money; goodness knows I've spent a good chunk on my ole 7.3! No reason to stop now!

Thanx for the input.

 

This is going to be for a drag racing application by the way, all though I am planning on keeping it pretty much street legal for occassional drives on public streets.

 

600-650 out of a 7.3? I bet you could build 3 12v's over 650 for the same price and they would be twice as reliable.