I am playing with the Smarty RP and MP-8 settings. I am using RP3 on the smarty for everyday driving. I just started playing with the mp-8 settings and need to know where I should be @ idle and cruising speed of 70. Right now 5k-6k @ idle and 11-12k @70. Where should I be. I want to get to the ideal RP for each by using my mp-8. So in your opinons, whats good for idle and whats good for 70mph. I am thinking I need to be higher for cruising.

 

duk, 5 or6 at idle is perfect.and at 70mph 15 to 17 would be ideal.

 

Cool, i will adjust my mp-8 to around 16-17k while @ 70mph. I know that the 03 see less RP than the 04.5 and up trucks. I was thinking i would get bettert performance and a tad more mpg with it around 16k. Thanks

 

Your probably not going to be much over 15k with the 03, its easier on your injectors too.

 

So to stay at 15 or so, its safe for my injectors, correct?

 

is it the injectors or the tips that are the problem on the 03-04's? if you have aftermaket tips can you bump it more then with stock tips?

 

15k isnt that high,stock u can see close to 18k i dont think 15k is high at all,i see over 20k when i have my pred and quad on kill,ive seen 27 when i crank on her hard so 15 isnt much at all

 

I keep my truck around 16k @70mph, idle is good at 5-6k like said, the Mp-8 is usually set on about 60% most the time.

 

So what is safe for the 03-04's?With my 05 I see around 17-18k at 70mph with the Smarty on stock RP.Would the 03-04's with aftermarket sticks not be safe up in this range also?

 

Rick,

What's the max pressure you're seeing with the MP-8 set at 60%?

I maybe picking up a MP-8 soon.

MikeyB

 

We receive a handful of injectors weekly with cracked bodies. Almost exclusively to the 04.5 and up engines. Rarely do we see a cracked 03-04 injector. Matter of fact it has been a year or more. The real difference between the 2 engines is the pressure they operate at.

All injectors leak internally to some extent. Even brand news one out of the box. It is the nature of the beast. The design, if you will. Some of the leakage is between the surfaces of seat and its ball. As the pressure increases this leakage gets higher and higher. Like a waterjet cuts through steel with high pressure and abrasive particles so does the diesel fuel with dirt and dust across the ball's seating surface. Eating away metal in the seat over time.

The two most important things to keep injectors living the longest is: The lowest pressure you can run and clean, clean fuel.

Lubrication is not as important as the other two. Yes, we see wear and tear from todays low sulphur fuel, but the injectors handle it pretty well compared to pressure and dirty fuel.

We can always tell who keeps the filters changed and who does not. The injectors sealing surfaces tell the story.

 

At wot it will hit 23k and flash 24k a couple of times, but I haven't seen it pass that by much with it on 100% either, 24.5k or so. Crusing its hit and miss, I don't like to exceed 17-18k at any time cruising unless I'm hittting a steep incline.

 

On my 03 305/555 I observe the same pressures and my truck performs fine.

I use a VA C3.1 pressure box though. It calls for pressure differently than what I observed when running an MP8. With the MP8, pressure was immediately increased all across the rpm range as soon as the **** was adjusted. Conversely, with the VA, pressure stayed the same at idle and the same for the most part over the rpm range, but it ramped up really quick to mid rpm and slowly tapered off to OEM levels at high rpm. In fact, the Smarty programs with pressure manipulation feel a lot like the VA performance.

 

So Don...with people who run Smarty's, which we know doesnt raise overall pressure, just ramp angle. Do you think that if Smarty owner dont use a additional pressure box for daily driving that they are in no more risk of blowing an injector than someone who has a stock truck???

I guess my question really is, that if you use the best filters avail. and dont use a MP-8 etc. but just a Smarty am I more or less likely to blow a injector than someone who has a bone stock truck???

Is it overall pressure that kills them, or the ramp angle???

 

I think what don was saying was if you take a stock truck that spends alot of time at cruising RPM and 11-12k Pressure and a modified truck with the same amount of time at the same RPMs with higher pressure 16-17k that the modified injectors will wear and leak more than the stock truck not necessarily crack an injector. Cracked injectors come from too much pressure or spikes in pressure. anyone correct me if im wrong.