Engine/Transmission (1998.5 - 2002) Comp vs. Drag Comp

[Cory]

I currently have a regular ol' comp box in my dodge. But something is wrong with it internaly so I had it sent back and I am going to upgrade to the drag comp. Does anyone have the drag comp? What are the advantages over the comp? Is there a noticable difference in the fuel it sends to the motor? Thanks for the input!

 

[Billywj]

i was told by edge that the only difference is on 5/5 it holds fuel all the way through the rpm range

 

[KLockliear]

In power level 5, the drag version adds more fuel above 2700rpm to compensate for the drop off in fueling that is in the stock fuel curve. Even though they make more power, the standard models follow the stock curve.



#ad

 

[Gary - K7GLD]

UNFORTUNATELY for some of us, with the drag Comp only providing improved fueling on 5x5, the EGT can be a problem LONG before the higher RPM range is encountered - this might be especially true in towing situations. I'll at least find out how my stock Comp does when towing across various levels with the new injectors in a few weeks - then I'll have a far better idea whether the drag version would actually be practical in the situations where I would most often want to use it...

 

[KLockliear]

In all seriousness though, who is going to try to tow in level 5? The answer should be no one.



The drag version is just for that - DRAG racing or other competition.

 

[Gary - K7GLD]

In all seriousness though, who is going to try to tow in level 5? The answer should be no one.



The drag version is just for that - DRAG racing or other competition.

When towing in the long 7% Sierra grades, I often used 5x5 - with NO EGT or other problems - of course, RPM was more like 2000 RPM than 3000 - so you're probably right. Only exception might be guys with much heavier RVs than ours, who in specific passing or grade situations, might shift down a gear or 2, and get the RPM up higher in the band.



But I suspect you're correct in that dyno pulls and drag racing - and perhaps sled pulls would be the more common applications for the drag version.

 

[Cory]

Thanks for all the input

 

[WadePatton]

More about that.



The "Drag" version changes NOTHING until 2700 rpm--clearly shown on the chart posted above.



It is LEVEL 5 not just "5x5" that provides "full" fueling past 2700.



And, for the record, I don't tow in level 5.

 

[c-hawk]

I'm not disputing what keith and everyone is saying.



But when i upgraded to a drag comp i had noticeable increase in smoke (during low boost conditions) on level 5x5. My standard comp on 5x5 only smoked as much as my drag comp on 5x2 or maybe 5x3. I guess it's possible that the standard comp wasn't working properly???



Either way the drag comp is a must for racing. The extra fueling above 2700 really helps.



Later,

Chris

 

[Gary - K7GLD]

I'm not disputing what keith and everyone is saying.



But when i upgraded to a drag comp i had noticeable increase in smoke (during low boost conditions) on level 5x5. My standard comp on 5x5 only smoked as much as my drag comp on 5x2 or maybe 5x3. I guess it's possible that the standard comp wasn't working properly???



Either way the drag comp is a must for racing. The extra fueling above 2700 really helps.



Later,

Chris

Chris, I'm on my second Comp - the original developed problems and was quickly replaced by Edge with great speed and NO hassle! That has been a couple of years ago - and the replacement I'm still running shows FAR more smoke in the lower settings than the first one did - even tho IT worked well the first year or so - and BOTH were the same Revision level!



I have no idea why the difference, nor do I have documented proof that the later one provides any power difference from the original on, but that extra fueling in the lower settings would sorta make me expect more low end power in those lower settings - dunno about 5x5...



According to the guys at Edge, no programming differences between my 2 - so either the first one was somewhat ill from the start - or else this later one is - but BOTH clearly display(ed) the expected gradual increase in power along with increased smoke as settings were increased - it's just that the later Comp does more, faster...

 

[RAndrae]

tap or not

I did a search but this may be faster... . what is the deal if you dont t ap the pump wire?? thanks

 

[c-hawk]

If you don't tap the pump wire, it will work as an ez when turned on (no matter what level you set it to). When turned off it will add no power but still work as a boost fooler.



I ran my comp this way for probably six months until i got my transmission dtt'd.



Chris.

 

[Double J]

I'm not disputing what keith and everyone is saying.



Either way the drag comp is a must for racing. The extra fueling above 2700 really helps.



Later,

Chris

How much help exactly? For the first time a couple days ago at the races, I watched my boost gauge go from 41psi down to 30psi and pretty much bounced around like that all the way to the finish. A little worried at first, I'm assuming this drop in boost is a result of the regular comp defueling at 2700RPM. How much of an improvement will a "drag" version help in the 1/4? It's a little frustrating when someone comes from behind to eek by me (or to slowly pull away) because I'm running out of stem on the top end. Either way, I'm going to upgrade... just curioius if anyone has done a comparison between the two versions.

 

[Holysmokes]

UNFORTUNATELY for some of us, with the drag Comp only providing improved fueling on 5x5, the EGT can be a problem LONG before the higher RPM range is encountered





Gary, thats the truth! Sheeesh... I can hit 1350 fairly easy w/o towing. I back off because I'm afraid of causing any component failures. Hopefully, the $125 spent on upgrade will include 2" piece of duct tape to cover EGT gauge when set to 5x5. :-laf

 

[WadePatton]

Sheeesh... I can hit 1350 fairly easy w/o towing. I back off because I'm afraid of causing any component failures. Hopefully, the $125 spent on upgrade will include 2" piece of duct tape to cover EGT gauge when set to 5x5. :-laf

If I get the 24v to 1350 empty then it's over 100mph, if it was a rolling start we'll be pushing 120. Add a zero to that $125_ and pop a nice turbo on there.



Also. Sustained temps equal to or over 1300 may be dangerous, but short efforts to 1500+ don't bother the competitive souls. The EGT gauge is great for testing and tuning and towing, but TO BE IGNORED during competition--assuming that competition is a drag race or sled pull.

 

[Wyatt 1]

same problem

How much help exactly? For the first time a couple days ago at the races, I watched my boost gauge go from 41psi down to 30psi and pretty much bounced around like that all the way to the finish. .

Double J, I recently had the same thing happen to me and I have been baffled as to what it could be and what you have described is exactly what happened to me, it cut out real bad, I have the drag but I was on 4/4, it cut out in third and fourth gear and when I shifted into fifth and let off everything was good. I was to busy watching the boost and egt and did not think about the tach, I bet that is what it was, it defueled at the 2700 rpm, thanks,

 

[rivercat]

In power level 5, the drag version adds more fuel above 2700rpm to compensate for the drop off in fueling that is in the stock fuel curve. Even though they make more power, the standard models follow the stock curve.

#ad

whould the special CaTCher ECM not eliminate the need for the drag option
I have the regular and it fuels strong to 3400 as im sure both versions do

not sure if you have ever played with a CaTCher or not but looking to solve this question

Im sure the reg comp is cheaper and it shows more peak hp at 26-27 hundred rpms than the drag version

Thanks KEN

 

[KLockliear]

Dunno about the catcher. Never seen or tested one. The difference between the power of a std Comp vs. the Drag at 2600-2700 is negligible. 5hp you won't feel or know about. The curve in the programming is the same, until 2700rpm.

 

[LAMiller]

the difference in the 2 boxes is definitely worth the 125bucks IMO!! I went from a 14. 12 to a 13. 9 by upgrading to the drag comp! and in the mean time I went from 265 stock tires to 325/60/r18's!! never got a chance to run the drag comp with the stock tires!! It also dyno'd an extra 56hp over the regular one! Lots more smoke on 5x5 and HOT EGT's!!! I peg my 1600 gauge by 70mph so I dont know how hot it is by 95mph at the end of the quarter mile!!

 

[SnoKing]

I did a search but this may be faster... . what is the deal if you don't tap the pump wire?? thanks

I have my untapped Comp set to:

1x1

2x2

3x3

4x4

5x5



So as I step thru the five main levels (which is easy), I am varing the sublevels that are the only thing in effect when untapped.



I leave it on 3x3 most of the time. At sublevel five, I can make a little smoke! Which I do not do very often.



I believe sublevel 3 brings fuel on similar to stock, less than 3 delays fueling and more than 3 brings fuel on earlier.



SNOKING