1000+ RWHP 3rd Gen???

[michaelRitz]

Check out the Competition forum, 1000rwhp Duramax on #2 only. Is any 3rd gens doing this yet?

 

[michaelRitz]

Duramax has according to Comp Forum:



Twins from Nathan Wright (IdahoCTD on the DP)

Dual CP3s

Custom Don M injectors

Race ported heads and cam from SoCal Diesel

Pistons shaved to lower compression, coated. Billet rods.

ATS extreme Allison

EFILive tuning

 

[lmills]

it will happen this year... ...

 

[jwilliams3]

I think we need more revs (than we have now) to get it done though...

 

[BSwope]

Yeah id say this year is gonna be another good one for the third genners! Just look at last year!

 

[JRD]

I know its about 200 HP short, but hey we're getting there http://www.cumminsforum.com/forum/3rd-gen-...-1-26-07-a.html

 

[michaelRitz]

it will happen this year... ...

You guys figure it out, I'll save my money so you guys can recieve my money when I buy the necessary parts, heck maybe I'll let you install them to make it run over a 1000rwhp, I'll need a (another)bigger turbo and some more piping. :-laf Dual CP3s and some sticks

 

[Idaho CTD]

I think we need more revs (than we have now) to get it done though...

What makes you think that? Keith's truck (The owner of the Duramax that did 1000hp) didn't need to spin high rpm to make that power. As a matter of fact the truck is fully streetable (with a lesser tune anyway) and will tow a trailer back to Alberta when he goes home. The twins spool fast because that is what he wanted first and foremost, a streetable truck. The torque numbers alone tell you it spools fast. I'm actually building a twin set using the same turbos for a 3rd gen right now.



Personally I think the high hp Dmaxes will be plagued with problems for a while. I still dont think the pistons will hold up for any kind of long term use not to mention the bearings. My next project will find fault in every weekness the Dmax has but if it holds together we'll see atleast a couple hundred hp more. This truck is going to be a single cab 4x4 for 1/4 mile runs only so streetability isn't a concern.

 

[ENafziger]

What makes you think that?

The equation relating horsepower and torque is:



Horsepower = (ft-lbs torque x rpm) / 5252



So, generally speaking, horsepower increases as rpm increases. However, torque often begins to drop off around 3,000 rpm, and so horsepower actually only goes up if your engine rpm increases faster than the torque drops off.



If you engine setup was such that the torque curve was flat in the high rpm's, then turning faster would be a logical way to generate more h. p. --Eric

 

[RobertP]

high rpm is for sled pullers and gas motors. most of the power a diesel makes will be under 4000 rpm. there should be several CR motors making this power in 07'.

 

[Bandit1]

whatever happened to 800?

 

[JasonCzerak]

high rpm is for sled pullers and gas motors. most of the power a diesel makes will be under 4000 rpm. there should be several CR motors making this power in 07'.

I still don't get it, why can't higher RPM's help out in a drag race?



Assuming torque doesn't drop clear off the graph, why couldn't running an extra 1000rpm's not help with better rear end gear and/or tire size?



With my truck, it just feels like 4000rpm would do so much for over all performance, specifically that 2nd gear hole shot.

 

[RobertP]

I still don't get it, why can't higher RPM's help out in a drag race?



Assuming torque doesn't drop clear off the graph, why couldn't running an extra 1000rpm's not help with better rear end gear and/or tire size?



With my truck, it just feels like 4000rpm would do so much for over all performance, specifically that 2nd gear hole shot.

i agree 4000 would help at the end of the run, but 5,6,or 7000 is not going to gain any power. it's just rpm then. i feel 4000 is plenty on a CR and 1000hp can be had @ 2900k easily

 

[JasonCzerak]

i agree 4000 would help at the end of the run, but 5,6,or 7000 is not going to gain any power. it's just rpm then. i feel 4000 is plenty on a CR and 1000hp can be had @ 2900k easily

Hate to agree with Comp just a little. But I was also under the impression that if you could carry your torque far enough up the RPM band to keep the HP level, you'd be all set until HP numbers drop off, then you ideally want to shift INTO the beginning of the torque peek.



So if you can make 500HP at 2000rpm, and carry it to 5500rpm for further, you should.



Can a mechanical diesel have a wide band or RPM's to play with?

 

[RobertP]

Hate to agree with Comp just a little. But I was also under the impression that if you could carry your torque far enough up the RPM band to keep the HP level, you'd be all set until HP numbers drop off, then you ideally want to shift INTO the beginning of the torque peek.



Unfortunately, there are not a lot of mechanical diesels with a wide band of RPM's to play with from some of the graphs I've seen. The CR's should be able to provide that wide band of power.

you are right, in a perfect world this is the idea, but first we need to make peak power past 3200 rpm, then we will work on a higher rpm. as for higher and brouder tq curve---thats what moves your truck down the track, hp only accelerates it. yea comp knows his stuff.

 

[jwilliams3]

Nathan,

I guess what I mean is more rpm will help us make the power. It is not necessarily a need but rev's will help with the horsepower equation. Especially rev's with fuel.



NGM,

You can only make so much torque before the motor starts tearing itself apart.

The big power guys that are running 1500hp or whatever are spinning way up and over the 5000rpm area.



Remember torque numbers will drop off in any engine when the rev's go up.

When any engine exceeds 5252rpm the hp number will be greater than the torque number.