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retired


Guys, I must say that this Tune has absolutely changed my 05 !! Fuel econimy has increased, trans shifting is soooo much smoother now, and you have to love the performance. This is what the CRD should have been from the factory . And thanks again for the extra effort on your part to track me down when I was going through your area - that is customer service.

95BadBoy
linewarbr
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Joined: 17/07/2009 12:13:13
Messages: 17
Location: Baton Rouge, LA
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Anonymous wrote:Guys, I must say that this Tune has absolutely changed my 05 !! Fuel econimy has increased, trans shifting is soooo much smoother now, and you have to love the performance. This is what the CRD should have been from the factory . And thanks again for the extra effort on your part to track me down when I was going through your area - that is customer service.

95BadBoy


X2 on that. I love the increased driveability, particularly at low speed. I'm not as impressed with my mpg gain, my EVIC is reading 33 mpg but hand calculated against my GPS I'm at about 26 average. I never had any idea that the EVIC was so off. But, that's still 3 mpg more than I was getting - and for a 4x4 with moderately aggressive tires, I can't complain at 26!

Looking forward to the Turbo kit. It may be nothing, but that sound my turbo is making between 2300 rpm and 2900 rpm is disconcerting. Hopefully changing the exhaust will remedy it somewhat. . .
CRD Joe
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Joined: 18/07/2009 21:11:02
Messages: 45
Location: Seattle, Washington
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Im getting as high as 38mpg with my Inmotion. I might just wait until the turbo kit is out as there will be a computer flash necessary with the kit.

'05 CRD
Suncoast, Transco, Inmotion, Provent, ORM Snorkle, HID's, 2.5" Cat back no muffler, V6 Airbox, Fumoto, Cat 2 filter
95BadBoy

Joined: 19/07/2009 06:48:47
Messages: 9
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Linewarbr - what kind of mileage drop did you see when you upsized your tires ? Did you go to the 245/75's ?
GreenDieselEngineering
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Joined: 10/07/2009 07:25:47
Messages: 371
Location: Southeast Michigan
On our 2006 KJ we installed a set of BFG All-terrain 245/70R16 and the fuel economy dropped about 2.5-3 mpg. We are seriously contemplating a second set of rims (as you know) to get a set of e-rated tires for summer use. The e-rated tires should increase fuel economy up to 2 mpg over stock. It would be nice to hear other mileage comparisons from KJ owners that changed tires.
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Pablo

Joined: 21/08/2009 13:29:56
Messages: 2
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I have the eco tune for now, I am hoping that will hold me till I get the turbo and I can skip the hot tune.

I only ran the tune for two tanks before getting 4.10 gears, Detroit Tru-Tracs front and rear, and 32 inch MTR's on steel wheels.

During those two tanks of in town driving (getting parts and running errands) it got 27 mpg with the stock wheels wearing 245/75/16 Revo's. The Jeep also has a Frankenlift. That in town mileage is about what I was seeing highway. This is also in the middle of the summer in Phoenix, when it is that hot my mileage goes down in town because the fan comes on so much.

Since the tires and gears (my wheelset is over 80 pounds a wheel now) the mileage has dropped. I don't really know how much until I check the odometer's accuracy, as the taller tires have thrown it off more. My new tires are E-range 235/85/16 MTRs, but I am still running them at whatever psi Discount Tire put in them. Between the tire pressure and the new gears settling in (and moving to new fully synthetic gear lube front and rear), I hope the mileage goes up just a tad. I plan to run both the Revo's on the highway trips and the MTR's offroad. I am happy with the tune so far. The extra power is noticeable across the band.

When it comes to tire size, one thing I noticed with the stock 3.73 gears is that going from stock tires to 245/75/16 tires and a lift did not change my highway mileage much. I only took a hit in town. The vehicle felt zippier at highway speeds with the higher gearing from the taller tires.
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Lancer

Joined: 15/07/2009 02:30:43
Messages: 18
Location: London, England
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Currently (and I don't yet have the GDE tune) I'm getting 28 mpg (imperial) which I think would be about 30 - 31 mpg (US). That's after I fitted new tyres - General Grabber AT2 235/70 R16. Although the same size as the Oe Goodyears they are an AT whereas the OE were more road -biased. The Grabbers are a bit heavier as well. This is only a bit less than my old Peugeot 1.8 petrol!

Once back in work and with the cash reserves built up a bit, I will go for the turbo and tune upgrade. I suspect that the improvement will be marked

One question for GDE; given that I will have to have the turbo kit fitted by someone who knows what they are doing, and I'll have to drive to that place, will I be able to fit the (upgraded) ECU and drive to the mechanic's place - which may be some distance away, or will the tune ONLY work with the turbo in place - ie will they have to be fitted at the same time?

Light Khaki 2005 CRD Sport. TJM type 17 bumper, extended breathers, Grabber AT2s
linewarbr
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Joined: 17/07/2009 12:13:13
Messages: 17
Location: Baton Rouge, LA
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95BadBoy wrote:Linewarbr - what kind of mileage drop did you see when you upsized your tires ? Did you go to the 245/75's ?


I don't know honestly, as I was depending on the EVIC before I got the tires. I already had the A/T's when I got the GDE Tune. I'm running Firestone Destination A/T 245/70/16's, which is only about a half-inch taller, but 20 mm wider and roughly 6 lbs heavier per tire than stock. More contact patch = less mileage. (but more grip )

I was getting an overall average of about 23.5 mpg before GDE, and am now averaging around 26.9 mpg.
 
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