Just thought I woukld throw this out for illustration purposes.

In this AE graph you can see the ICP spike when I let off the throttle. As you can see the stock pump couldn't keep up with the demand and once I let off the ICP spiked from about 1300 PSI to about 3800 PSI when the injectors shut down. This spiking I am sure would eventually lead to a leak somewhere in the HPO system. This might be what blows some o-rings.



This is the next day with the Adrenaline installed. Same stock tune setting but no ICP spike when I let off the throttle. The spike has more to do with the stock HPOP then the programming. The Adrenaline kept up to the demand and just dropped off when I let off.



The same type of spike would occur with stock pump in 60HP Tow and 80HP Econo tunes. No spike in those tunes with the Adrenaline.

Both runs were on the same stretch of road under the same conditions so is a very accurate illustration of stock pump vs Adrenaline.

Edit: I had noticed the ICP spiking before on other WOT tests while data-logging. Had been looking for a new HPOP for many months. Glad I waited until the Adrenaline was available.

 

she only held 2500 PSI Robin???

 

2800 in 80E and 60T. According to Bob at Dieselsite in stock the PCM will not call for more then 2500 PSI and that is what I saw.

 

awww got ya...sounded low compared to other post..2800 sounds better..

 

That is 700 higher than what my 02 17 degree pump will hold in 80e

 

I would like someone with a stock pump and the ability to data-log do a WOT test to see if they also get a spike when they let off the throttle.

 

I have the ability and the right combination of equipment, and I need to do this very soon anyway for my baseline testing before installing my RR upgrade, but not sure when I'll get the time right now... perhaps on Saturday.

 

Thanks Pete. That would certainly be soon enough (or whenever). I am curious about the spike. I don't think it is just my 15° pump. But it certainly doesn't mean everyone will see it.

 

The truck does seem to like power when it gets past say 2300 rpms. I don't think I would call it falling on it's face bad, but noticeable. I think I would agree with the POS tunner I have.....

 

I will throw another test into the mix that would be nice to see.
UOA's
Anyone with the pump testing their oil?
The testing would be more about the how well the pump holds up.
In the past i have run into spikes in some wear metals. Blackstone believed
turbo bearing's. Investigations revealed it was the HPOP and not the turbo
in most cases.

Bill

 

Another WOT test would be nice.

What wear metals came up in a UOA due to the HPOP?

I'm not due for a UOA for another 1700 miles.

 

Copper/alum/tin.
Comes from the barrel lapping into the port face plate. (oem)
Most wear comes from the piston shoe to the retainer plate.(oem)
The barrel and shoes are brass type material. (oem)
You might see a spike then level off with the new pump.
Dont know if BOB is using the same materials or any coatings on the parts such as PVD ect.

Bill

 

Thanks for the info Bill.

 

Robin, I have done many passes on my original stock 15* pump and never saw that spike. I would have freaked out. Like you said, it can't be good for the rest of the stock system. I converted to a stock 17* pump several years ago and I can hold 2800 PSI @ 45% DC on a 120 tune, but I still have the original single shots from the early 99.

Jim

 

I have ordered the Adrenaline pump and can't wait to get it. Robin, I have ICP spikes when I let off at WOT. I will try to run the graphs for you to post, but consistently, ICP drops to around 1800 psi, then I let off and it goes up to 2500 sometimes over 2800.