Dr-Performance

oldnavy · **Posted:** Mon Feb 27, 2006 8:44 pm

I don't think he would come much past the Missippi River from MA where he lives, unless there was a lot of $$$ involved. I will be seeing him in May (VW TDI GTG) and even then I will be in an eastern time zone of SE MI. I will probably let him tinker, but only if price is right. The nice thing is these mods are not detectable at the dealer, the problems come in when the CPU has to be replaced for some reason. That's why some people keep a stock unit to change out when going into dealership for possible problems or even just normal service. I do know that flash upgrades done with StarScan have no effect on the MB's. Seems I heard the same thing about VW/Audi, but can not swear to that.

BlackLibertyCRD · **Posted:** Mon Feb 27, 2006 10:09 pm

This is from DR-Performance web site, not ebay

2030 2005 - 2006 Jeep Liberty 45 horsepower at rear wheels, 90 pounds of torque $695.00

Awesome horsepower enhancements for your Diesel Pickup.

A new choice to add horsepower to your Diesel Pickup by enhancing what you already have, you will receive 50 to 130 horsepower at the rear wheels, 135 - 300 pounds of torque, 10 – 15% fuel economy by creating a more efficient burn during the combustion process. This product is completely stealth, plugs into most vehicles within minutes and it does not alter the vehicle’s computer. If removed from the vehicle it goes back to factory specifications instantly, leaving no traces of the Predator Performance module on the vehicle’s ECM.

See the difference Predator makes...

The other guy's
combustion process
Not using Predator...
At the time of fuel delivery a large quantity of fuel is brought into the cylinder. An explosion takes place driving the piston down to, the bottom of the cylinder.

When the exhaust valve opens up, the unburned fuel re-ignites. Now you have fuel burning on the cylinder walls, on the top of the piston and you are pushing flame out of your exhaust pipe to the turbo.

The result of that is a lot of black smoke, your cylinder wall and your piston is very hot because you've burned fuel on the surface of them. This will score a cylinder wall, melt a piston and over all shorten the life of the motor.

Combustion process using
Predator Series product on diesel engine.
Using Predator...
By enhancing what you already have with a split fire injector, a small shot of fuel is brought in to create the burn. By feeding that fire on the down stroke with the 2nd and 3rd shot of fuel, we have created more hot gases in the cylinder. Which in tum drives the piston to the bottom of the cylinder and you have used up all of the fuel that was delivered into that cylinder.

Your exhaust valve opens up as your piston goes to the top of the cylinder. Since all of the fuel has been completely burned, the gases are cooling down going out the exhaust valve. Then the intake valve opens and cool air comes in to start the process over. The unloading of the injectors happens within a millisecond.

By burning fuel in the bowl of the piston or in suspension, you are not burning fuel on your cylinder walls or on the ring of the piston. You have created more hot gases in the cylinder by not buming fuel on the side walls of the cylinder or on the ring of the piston, you've only heated the air in the combustion chamber, not the metal. You have optimized the atomization of the air/fuel mixture, Which means more horse power, more torque, less cylinder wash and smoother power.

I think the bigger numbers comes from results they got from pickups, the results for the CRD is much lower. That's where e-bay ad got confused. I got the chip on ebay cheap by dumb luck, so I'm going to try it. I still think there will be a flowmaster in the future when I get around to it.

greiswig · **Posted:** Mon Feb 27, 2006 11:24 pm

BlackLibertyCRD wrote:

This is from DR-Performance web site, not ebay
(SNIP)
The other guy's
combustion process
Not using Predator...
At the time of fuel delivery a large quantity of fuel is brought into the cylinder. An explosion takes place driving the piston down to, the bottom of the cylinder.

When the exhaust valve opens up, the unburned fuel re-ignites. Now you have fuel burning on the cylinder walls, on the top of the piston and you are pushing flame out of your exhaust pipe to the turbo.

The result of that is a lot of black smoke, your cylinder wall and your piston is very hot because you've burned fuel on the surface of them. This will score a cylinder wall, melt a piston and over all shorten the life of the motor.

Combustion process using
Predator Series product on diesel engine.
Using Predator...
By enhancing what you already have with a split fire injector, a small shot of fuel is brought in to create the burn. By feeding that fire on the down stroke with the 2nd and 3rd shot of fuel, we have created more hot gases in the cylinder. Which in tum drives the piston to the bottom of the cylinder and you have used up all of the fuel that was delivered into that cylinder.

Your exhaust valve opens up as your piston goes to the top of the cylinder. Since all of the fuel has been completely burned, the gases are cooling down going out the exhaust valve. Then the intake valve opens and cool air comes in to start the process over. The unloading of the injectors happens within a millisecond.

By burning fuel in the bowl of the piston or in suspension, you are not burning fuel on your cylinder walls or on the ring of the piston. You have created more hot gases in the cylinder by not buming fuel on the side walls of the cylinder or on the ring of the piston, you've only heated the air in the combustion chamber, not the metal. You have optimized the atomization of the air/fuel mixture, Which means more horse power, more torque, less cylinder wash and smoother power.

I think the bigger numbers comes from results they got from pickups, the results for the CRD is much lower. That's where e-bay ad got confused. I got the chip on ebay cheap by dumb luck, so I'm going to try it. I still think there will be a flowmaster in the future when I get around to it.

Aren't marketing departments wonderful? Gosh, I believe every word! :wink:

cevans · **Joined:** Wed Aug 24, 2005 12:48 pm **Posts:** 278

Oldnavy,

You wouldn't be referring to Rene, would you?

I am very interested in what he has for these CRDs.

oldnavy · **Posted:** Tue Feb 28, 2006 9:11 am

cevans wrote:

Oldnavy,

You wouldn't be referring to Rene, would you?

I am very interested in what he has for these CRDs.

No, it's Jeff at Rocketchip. There is a new guy over in S IL that has started training to work for him I believe, he emailed me that he would be able to do the CRD after he finished training. However he never got back to me, so I don't know if he is chipping yet or not. He is coming to a GTG MD weekend (May 27) and will be chipping there. He actually does the CPU and like I said the StarScan will not see the mod and the CPU can be flashed for most upgrades without effecting his programing if I remember correctly. Jeff is a degreed computer engineer with years in the field before going into business for himself.

cevans · **Joined:** Wed Aug 24, 2005 12:48 pm **Posts:** 278

Didn't know Jeff had any intention for doing a CRD. Thats really awesome news.

I'm not a subscriber to any of those camps, and I've worked directly with Jeff at over a half-a-dozen Eastern TDI GTGs.

oldnavy · **Posted:** Tue Feb 28, 2006 12:30 pm

I was a little leary as to letting the "cat out of the bag" as he hasn't told me he has done anything as yet with the CRD. I didn't want him to get flooded with before the fact calls, although I think he said ghe already has.

oldnavy · **Posted:** Tue Feb 28, 2006 12:33 pm

cevans wrote:

Didn't know Jeff had any intention for doing a CRD. Thats really awesome news.

I'm not a subscriber to any of those camps, and I've worked directly with Jeff at over a half-a-dozen Eastern TDI GTGs.

Then you must have recognized my handle from Fred's TDI forum and the Old Navy CCV filter I developed and had local machine shop build?

Ranger1 · **Joined:** Mon Oct 17, 2005 7:40 pm **Posts:** 1137

Quote:

That's the big unknown, how high and for how long do these boxes jack the pressure up? Another unknown, where does the fuel pressure on the CRD run at for various conditions, even before you add on one of these boxes?

Agreed. I think the question any tuning box vendor should be able to answer straight up is "Do you at any time, raise the fuel rail pressure over the factory design limit of 23,500 psi?" If they can't or won't answer, it should be a warning sign to us. Another warning sign I see is if they raise boost pressure beyond the 26 psi from factory stock settings. If they are raising fuel rail earlier in the rpm range, but staying within design limits, it doesn't seem like it would harm anything, at least ip or injector wise.

BlackLibertyCRD · **Posted:** Wed Mar 01, 2006 11:37 pm

Got it today and installed it. Feels smooth and strong, check highway mileage and that increased. Could only get 25 mpg before, now get 28 mpg. Tried full throttle, it didn't blow and white smoke as did before and screeched the rear tires on takeoff (2WD). Still have some turbo lag, replacing the muffler or catback exhaust should help. That be the next mod.

oldnavy · **Posted:** Wed Mar 01, 2006 11:43 pm

Wife's CRD will spin the tires rather easy, and it doesn't have a chip, just a Flowmaster 40 muffler.

BlackLibertyCRD · **Posted:** Wed Mar 01, 2006 11:47 pm

My CRD wouldn't do it before the chip, the flowmaster should make her rip. Not that's my goal but I like better performance.

oldnavy · **Posted:** Thu Mar 02, 2006 12:07 am

Our's would spin them before the muffler job, the first time I spun them was on the dealership's lot as I was leaving for test drive. I had the Jeep moving less then 5 mph when I hammered it and it spun them right up, and it still does.

BlackLibertyCRD · **Posted:** Thu Mar 02, 2006 12:35 am

OK, did the flowmaster do anything for performance?? I didn't ever try flooring it moving at 5mph either.

oldnavy · **Posted:** Thu Mar 02, 2006 9:06 am

BlackLibertyCRD wrote:

OK, did the flowmaster do anything for performance?? I didn't ever try flooring it moving at 5mph either.

Some were talking about it increased their mpg's and it will allow for a faster spool up of the turbo, reducing lag and allowing slightly faster take offs. I don't know if it's enough to brag about, to me the big deal with replacing muffler or taking it off completely is lower EGT's and longer turbo life.

omniphil · **Posted:** Thu Mar 02, 2006 9:53 am

BlackLibertyCRD wrote:

Got it today and installed it. Feels smooth and strong, check highway mileage and that increased. Could only get 25 mpg before, now get 28 mpg. Tried full throttle, it didn't blow and white smoke as did before and screeched the rear tires on takeoff (2WD). Still have some turbo lag, replacing the muffler or catback exhaust should help. That be the next mod.

whoa, 3mpg, thats pretty good... Is this with the EVIC thingy I assume?

Reggie · **Posted:** Thu Mar 02, 2006 1:58 pm

BlackLibertyCRD wrote:

My CRD wouldn't do it before the chip, the flowmaster should make her rip. Not that's my goal but I like better performance.

Mine will not spin the tires unless it is raining and it averages 20 mpg at best no matter what grade of diesel I put in it. At this point it's either I dump it for something that will get better fuel economy or mod it to try and improve the crappy economy. If I could get an extra 3 mpg it might be worth it.

LibertyCRD · **Posted:** Thu Mar 02, 2006 2:59 pm

Mine won't spin the tires on dry pavement either...never has been able to. The turbo just won't spool up quick enough.

But don't worry your mileage will get better. I'm averaging 20 mpg right now too. But back in the summer I was averaging 24. The winter blend diesel fuel kills your mileage. It'll get better in a couple of months and you'll pick up those 3 extra miles per gallon you want.

Reggie · **Posted:** Thu Mar 02, 2006 4:20 pm

LibertyCRD wrote:

Mine won't spin the tires on dry pavement either...never has been able to. The turbo just won't spool up quick enough.

But don't worry your mileage will get better. I'm averaging 20 mpg right now too. But back in the summer I was averaging 24. The winter blend diesel fuel kills your mileage. It'll get better in a couple of months and you'll pick up those 3 extra miles per gallon you want.

I could be wrong, but I don't think they have winter fuel in Houston. If anything, they are supposed to be selling TexLED diesel now which has a cetene rating of 48. I've also tried different mixes of biodiesel from B20 to B100 with no improvement.

valkraider · **Posted:** Thu Mar 02, 2006 5:49 pm

What type of driving? City or Highway? What percentage?

20 is too low, realistically. Although on 100% city stop-n-go driving I have had a whole tank get 19mpg...

But if you have any kind of mixed - it should be higher than 20. I have also had a 100% highway tank get over 30...

I am told that bad mileage is a symptom of EGR failure.... I do not know first hand.

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