1st gen dyno run IRP

[bgilbert]

Seen a 1st gen dyno in Indy (IRP), looked just like my truck, only less HP:-laf. Guess I should've taken the late Pastor Bob's advise of not doing too many things at once. Changed injectors, intercooler/aftercooler and timing (pump gear advance, ksb locked). I'm hoping it was just too much timing and or small turbocharger. I've got the pump gear advanced a tooth, and the pump head still almost up against the head. I also stuck a cold beer can between the power steering pump and injection pump (against the ksb) to make sure the wax pellet, or whatever the term is, was at the cold start point. Then unplugged it. This way nonIC'd style, the pump would be locked in advance.



423hp/801ftlbs down from 450hp/918ftlbs. Not what I was looking for, but I'm gonna back off the timing and try a bigger single charger (Pro52).



Link to dyno run video: YouTube - 89 Dodge Cummins dyno run IRP 07



I will say I made more power at a higher RPM compared to my 450hp dyno run last year at Scheid's event. Scheid event I made 400hp at 3000rpm. 350hp at 3200rpm. Little to no HP beyond 3200rpm. This run I made 423hp at 3000rpm, 400hp at 3250rpm, 350hp at 3500rpm. Run out to about 3800rpm.

 

[91W350]

Wow! I need to send my truck and a box of cash your way for a while! Looks great. Glen

 

[dpuckett]

I have mentioned this from my own personal experience, but it IS possible to get too much advance, esp if you went 5deg above what you were at last year. Did you have smoke similar to last year? If so, I'd say you are still over-fuelled/ under-aired (it's a word now).



I do like how the power band stretches farther than before, so there is something to be said there, too.



Daniel

 

[Greenleaf]

Your lOOking for 27° advance by the time the engine reaches about 2,500 rpm. There are a couple of methods in which to accomplish this.



17° of static advance time (something as 17mm lift) then shortening the advance piston.



Or, give her 20/21° static and the advance piston will advance as normal to aquire 27° advance.

 

[Moab4x4]

Congrats

I love the #'s even it they are down a tad. The price of research.

Great job!! I appreciate the additions to the TDR knowledge base. !!

Same game, different league, but I love to watch!

Ken