On the DynoJet I used, we found that we had to gradually bring the revs up to 3000 RPM with OD off before the fuel delivery pedal could be "matted" and a smooth run to redline acheived. (Doing so at any lower RPM caused either a downshift or the TC to unlock. I'm not familiar enough with these transmissions to be sure exactly which it was.) So, "full throttle" runs at a lower RPM were just not possible. I was advised that the dyno had to be used with a one-to-one ratio, hence OD had to be locked out. (With an inertial dyno there has to be all sorts of calculation to "understand" rear end ratio, tire size, etc., etc. and interpret it correctly in relation to how rapidly the vehicle "accelerates" the 600 lb rollers.)

I have done all my racing engine development on engine load dynos. They are much easier for my limited brain to grasp(i.e. full throttle, adjust the load to get the desired RPM, read the load cell, simple). I never intended to get into a discussion of dynos here and open such a can of worms.

This is my wife's Jeep that she uses to tow her horse trailer. With the testing I did, I convinced myself that the InMotion tune makes roughly an extra 25 BHP and 50 ftlbs of torque over stock. That's all I was looking to acheive and I am satisfied.

I'll see what happens with the SPDiesel tuner box, if I ever receive it, and let you all know.

Best Wishes,

DOC

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP

Believe me, this discussion is tame and healthy by the standards of this board.

Someone correct me if I'm wrong, but I don't think there are any 1:1 ratios in our gearbox (then there's the diff). And on a dynojet, you don't have to be 1:1 if you can get an engine rpm signal. On a gasser it's easy, just put a pickup clamp on a spark plug wire. On a diesel it's harder, but the techs at my place are used to it, so they took off the skid plate and used some kind of inductive or optical pickup too look at the crank pulley from below and get a signal. That way we did the runs in 3rd gear, TC locked. I blame the F37 if your Jeep couldn't hold full throttle locked at 2000rpm or lower.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

CATCRD,

The shop I went to was not familiar with diesels (??). I put a piece of "chrome tape" on the crank pulley and rigged up a mount so they could attach their optical pick-up on the top side of the motor. It is very tight and there is really only one precise spot that will still work when everything starts moving around a bit under load. (I'm sure it is much easier with the skid plate off. BTW, does it serve any purpose if you do not plan to go off-road? Love to get as many pounds off as possible since it weighs a 1000 lbs more than I had expected.)

DOC

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP

I thought 3rd gear was 1:1

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2005 sport crd-SOLD No regrets

I would leave the skidplate on. You never know when you'll come across a big piece of debris in the highway that will take out your oil pan.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

3rd gear is 1:1 ratio.

As said the diff ratio has to be corrected for as well.

I will try the flooring slowly thing soon. I never thought I would be able to have it locked up and at WOT at the same time

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L.O.S.T forever!
Silver 2002 Skoda Fabia TDI, 235,000km
Former car: Jeep KJ 2003 CRD

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