Hey guys, First off.. I'll post up a power graph when I get a chance. I'll do a back to back power pull measuring TQ with the stock tune vs the performance tune. Not sure.. but I think this next week I'll have some time to do this. I'll make a vid of my exhaust at the same time too. Also up soon its time to take this thing to the dragstrip and see what it'll do.
OK on to the x-cal.
I recieved it yesterday from bamachips. I installed and drove all three tunes on 93 shell gasoline. Spent a fair amount of time playing with it and the options like idle speed and timing. Have driven it 50/50 about 70-80 miles so far. Got a good chance to go 0-70mph in each tune and such.
Tune 1 = daily driving "93 performance" with milage being important.
Tune 2 = "93 towing"
Tune 3 = "93 perf/race"
I asked Doug to give me a milage tune and a drag race tune that was "hot".
As far as the towing tune I told him I'll tow our 3000 lb boat locally and from Mi to Tenn once a year.
Tune 1 impressions:
It's got more low end for sure. It'll now turn the tires over where as before it didn't. I very much like the light throttle response and feel of power at 40-50mph. I think he's got the torque convertor locked up longer which makes the throttle feel more responsive. Not sure though..
I was disappointed in shift firmness. It felt completely stock to me. So I upped the pressure and now have it on max firmness (25%). Even like this it's really no different unless your pushing the power up to 50% and higher. Even at WOT it's no where near a tire chirp. I'll talk to them about this.
Tune 2 impressions:
This is the towing tune. Haven't towed yet. But one thing I LOVED is how the tranny and TQ convertor stays locked and you can push the throttle quite a bit. Other tunes would have downshifted at the same throttle input.
Tune 3 impressions:
I told him I wanted a firm shift but not enough to hurt the truck. He delivered on this one.. but only at WOT. At WOT the tranny shifts firm and quick. The TQ convertor also locks MUCH quicker right after the shifts. Since I'll only use this tune at the dragstrip I won't comment or care about part throttle settings. But just know that it's shifting is like stock unless your at WOT. This tune does seem a little hotter that tune 1. Not too sure how much though.
Optional settings impressions:
Timing. It definately helps tip in. No pinging so far.
Shift points. I'm not sure why but this does not seem to actually change the speed/rpm at which the shift occurs. Gotta talk to them about this.
Shift firmness. I'm disappointed overall with it on tune 1. I've got it cranked all the way to 25%. and I certianly wish it was much firmer
at part throttle. Feels pretty much stock unless your pushing it. And even then it's nothing to write home about.
Fuel. Don't want to touch this one w/o looking at 02s
Idle speed. I tried many different settings. And have settled on keeping neutral speed stock (704rpms) But because of the crank underdrive I like the in gear speed to be 754rpms. Lower rpms.. and the steering gets heavy as well as AC and water pump functions can be effected. Truck does'nt seem to creep foward any more either.
Milage. Just don't know yet. But because of all the flogging it got in the last 12hours It's worse.
Middle of next week I'll know more.
Summary: IMO if your **only** looking for a power increase. It's not too good a bang for the buck @ $400. Don't get me wrong.. it makes more power.. but again IMO it's not enough to justify the cost. If this thing improves my milage then it'll be worth every penny.