Engine/Transmission (1998.5 - 2002) Safe level for Comp

[RJPotts]

I'm about to purchase an Edge Comp box and I have a few questions.

The truck is still under warranty (Cummins and extended factory), and I don't want to void it, so I'm not going to pierce the VP yet.

Question is, how hard is it to remove/install a Comp as compared to an EZ? I know the EZ takes about 5 min to pull off before a trip to the dealership.

Next question, the important one.

If it is farily simple to remove a Comp and I do put it on, what would be a safe level to leave it on where I will get a little bit more power than the EZ, but still won't destroy my factory clutch. I can't go easy on it, its not my nature, so thats out of the question and a clutch hopefully won't have be purchased until the end of summer.

Thanks,

R. J.

 

[R-N-R]

As I understand it, the comp box without the wire tap is equivalent to the EZ. By design, installing the comp box encompasses running a wire harness through the firewall so that you can change the settings in the cab, which will make it inherently more difficult to screw the dealer. I suppose without the pump wire tapped you could mount it in the engine compartment. Then it is just a matter of disconnecting power and ground, in addition to the map and data connections. I would definitely check with Edge on this before you mount it like this. BTW, if the dealer knows what they are doing, they can extract data from the ECM such as max boost, speed, rpm, and much more from what I have read.

 

[Herman8r]

Rock-I noticed in your sig. that you have a custom fuel delivery set up & an HRvp44. Is this all a custom set up?

Herman

 

[PC12Driver]

Yep, the Comp without the wire tap is the same as the EZ, power wise. Comp level one uses the data link only (like the EZ) and levels 2-5 also use the wire tap. But you do have the ability to turn the Comp off and also to change the fueling rate (sub levels). Sub levels 3,4, and 5 are the same as the jumper settings on the EZ. Sub levels 1 and 2 defuel even more at lower boost levels. But once over 20 psi all sub levels fuel the same. The lower settings help control smoke with bigger injectors. So you wouldn't get any more power, but you gain some smoke control. And like RnR said, it would be harder to screw the dealer.

 

[R-N-R]

Hi Herman,



I purchased the HR-VP from Industrial Injection Service, and OPoole's economy fuel kit. I had my kit configured to include an extra gauge port for pre-filter monitoring, and changed the traditional 7psi Carter for the 15psi unit which is mounted to the frame and augments the stock LP. I chose this route in attempt to have at least 10psi to the VP if (when) one of the pumps fail. The kit replaces the supply line from 2' ahead of the tank to the VP, and uses high flow fittings for the LP, Filter, and VP. I plumbed in a bypass regulator between the filter and the VP in order to limit pressure from the 2 15psi pumps. Excess fuel from the regulator flows to a Tee fitting plumbed into the factory stock return line. I also added a bypass for the frame mounted Carter pusher pump, this will enable flow around the pump if it fails. The pump is mounted to the frame with a piece of industrial floor mat between the bracket and the frame to reduce vibration noise. And lastly, I added a ball valve first in line from the tank to ease working on fuel related activity.



#ad




Hope this is what you were asking about,

Bill

 

[RJPotts]

Excellent, thats what I needed to know.

As I understand I can send a regular comp box to edge and for $125 or so, have a drag comp. Is this true?

And whether its true or not, what is the difference between a comp and drag comp?

Thanks in advance again.

-R. J.

 

[Gary - K7GLD]

As I understand it, virtually the ONLY difference between the "regular" Comp, and the Drag version, is defeating the DC defueling above 3000 RPM.



You *might* be able to also get an upgrade on the Comp version at the same time if yours is a pretty old model - altho' I have no idea what operational features the latest versions provide over older ones...

 

[R-N-R]

Here is the Drag comp Upgrade Form, $125 is the advertised price.



The Comp box defuels around 2800 RPM, the Drag Comp does not

The Edge Comp module maximizes engine efficiency by monitoring the RPM, timing, turbo boost pressure and fueling parameters. The module uses this information to determine and control both fueling and timing enhancements for the Bosch fuel injection pump. Timing and fueling enhancements are controlled via CAN-BUS through the Data Link and by connecting directly into the Bosch fuel injection pump.



The Edge Comp features five power levels with power gains from 40-120 horsepower. Each of the five power levels has an independent five-level adjustable responsiveness setting, providing for a total of 25 levels of adjustability! The responsiveness settings enable you to dial-in the optimum balance between responsiveness and low boost smoke control, no matter what additional power modifications have been made to the engine. The Comp module is fully adjustable on the fly and mounts inside the cab.



Sub-levels 1-3 on the Comp will provide de-fueling below stock. The de-fueling mode is entered only when rpm and boost are below a set value and stock fueling is being increased beyond a set rate. These conditions are different for each sub-level 1-3. During operation, when the de-fueling mode is entered, the rate of fueling increase is limited, which reduces smoke. De-fuel mode is exited once stock fueling equals the fueling controlled by the Comp. This way the transition is smooth and cannot be felt while driving. De-fuel mode is entered the easiest in sub-level 1 and has the smallest allowable fuel increase, while sub-level 3 de-fuel mode is not entered as easily and has a larger allowable fuel increase.



Sub-levels 4 and 5 allow adjustment of the additional fueling above stock based on boost level. Sub-level 5 adds the most fuel at low boost; Sub-level 4, which adds less fuel than Sub-level 5, corresponds to jumper setting 2 on the EZ.



The amount of additional fuel added is calculated, the amount actually added after being compared to boost from the total is as shown below:



Sub level 1: 33% is added at 0 psi boost

100% is added at 20 psi boost



Sub level 2: 50% is added at 0 psi boost

100% is added at 15 psi boost



Sub level 3: 67% is added at 0 psi boost

100% is added at 10 psi boost



Fuel may be added at 0 psi boost on all Sub Levels and EZ Jumper settings unless the de-fuel mode is entered as described above.



Power Level 1 on the Comp is the same as the EZ; on Power Levels 2-5 additional power is added via the wire tap onto the injection pump. If the pump wire is not attached with a Comp, Levels 2-5 are still operational, but the power gain is not any higher than Level 1. Under this scenario, however, power will come on much earlier in the throttle

 

[PC12Driver]

The Drag Comp will still de-fuel on settings 1-4 just like the regular Comp. Level 5 does not de-fuel.

 

[R-N-R]

The Drag Comp will still de-fuel on settings 1-4 just like the regular Comp. Level 5 does not de-fuel.

I was reading through some old threads and was confused about that, thanks for clearing it up!

 

[caleb c.]

I have heard the Drag version is good for 10 more HP than the standard comp on a dyno. I have also heard it pulls alittle harder all the way around. Can't wait to install mine,gotta get a fuel system upgrade first.

 

[RJPotts]

Yeah me too, other than me waiting for my warranty to be up, I have to do something with this fuel system, I don't want to buy a new VP. I will need a clutch too. I can't wait to be broke.

-R. J.

 

[Herman8r]

Thanks Bill. I have i simular fuel set up (thanks to RADdodge). Works great. I will check out the HR vp44. Is there a noticable gain?

Heman

 

[ACoyle]

simply stated - If you dropped the hammer on your EZ, thye can tell, if they want to. Dodge also reads this forum, so you are out of the closet, so to speak. Also true, a comp that is not tapped is an EZ. The moral tap it, enjoy. I left mine on 1 unless "That special need" arose. Loved every second of it.



AC

 

[R-N-R]

Thanks Bill. I have i simular fuel set up (thanks to RADdodge). Works great. I will check out the HR vp44. Is there a noticable gain?

Heman

Just cruising around town, my SOP meter equates it to about 2x3 on a comp box, so yes there is a very noticable difference. I think it is well worth it, when you get it at a good price, and when you need to replace the VP, otherwise I would go for a CaTCHer instead.