2nd prime delete for U7137 Please!

[ElectricBlueHemi]

I am also testing a rear O2 delete file from Hemifever. I guess we'll see what it takes for that as well. Of course, I know Diablo can't offer this feature in the preadtor per EPA.

[wvhemiram]

Having the option built in would be nice. That way if you are going to the track or don't want 2nd prime then you can disable it. But if you were going on a long trip then you can enable it.

[chefred112]

...I agree, just got my DS yesterday and installed it on my 05 Hemi qc (142k miles)... I want to make sure 2nd prime delete doesn't screw up tranny...having interesting things happen when programming tho. (I've re-created this 3x before goin to bed)... the 91 performance tune goes in flawlessly without any modifications. When I change other parameters (idle, rev limiter, speed limiter...), it appears to program it in but at the end it asks to turn ignition on (on already), I'd hit select and it would ask again an again until it says it didn't do it and to unplug it or reboot.... now the interesting caveat, the modifications took... my idle raised (I've had very frequent stalling issues with my cam/head combo) and din't experience any stalls whatsoever (even did some revs to try it)... I must say tho, it does feel different (in a good way).... I'm hopin that this (with more custom tuning/tweaks) puts me over the top and gets my qc into 12's NA stock block (currently 13.35).....

[~RAM~]

Good luck chef. N/a 12s in a qc is beautiful.
I got mine tuesday an had some tcm issues.
So I say to stay away from problems I'd not mess with the tcm parameters at the moment cuz they sketchy, oh also the tire size speed adjuster makes the predator go screwy also.
I've been messin with it an I've jus tweaked the pcm an all is well.
Bad thing I don't kno how to read the pid log LOL so can tweak that much but I'm learnin. Wish I knew my a/f ratio I don't kno if the pred shows it.

[~RAM~]

Good luck chef. N/a 12s in a qc is beautiful.
I got mine tuesday an had some tcm issues.
So I say to stay away from problems I'd not mess with the tcm parameters at the moment cuz they sketchy, oh also the tire size speed adjuster makes the predator go screwy also.
I've been messin with it an I've jus tweaked the pcm an all is well.
Bad thing I don't kno how to read the pid log LOL so can tweak that much but I'm learnin. Wish I knew my a/f ratio I don't kno if the pred shows it.

[Quick]

Wish I knew my a/f ratio I don't kno if the pred shows it.

It only shows pids reported from the PCM. If you don't have a wideband sensor on the truck then the a/f reported by the predator will be from the narrowband sensor and won't do you any good. The narrowband is used to adjust fuel in normal cruising mode to get 14.7:1. It's just goin to read "rich" in WOT mode so the only thing you'll know is that it's over 14.7. You won't know the actual a/f.

[~RAM~]

Wish I knew my a/f ratio I don't kno if the pred shows it.

It only shows pids reported from the PCM. If you don't have a wideband sensor on the truck then the a/f reported by the predator will be from the narrowband sensor and won't do you any good. The narrowband is used to adjust fuel in normal cruising mode to get 14.7:1. It's just goin to read "rich" in WOT mode so the only thing you'll know is that it's over 14.7. You won't know the actual a/f.

so do u think my truck would be coo wit the canned tune only? or could i add a lil more gas?
mods are LT HEaders, power wire,k&N cai, 2.5 true dual exaust..

[Quick]

I don't know. Can't speak to that. Adding a little more fuel isn't going to be dangerous but it may not help. I'd expect your LTs should have helped air flow a bit so it's likely you could use some more fuel. Hard to tell without that wideband a/f gauge.

Log ST Knock Retard and spark at cyl 1 (along with RPM, and something like load or throttle position so you can tell when you're at WOT). You can expect some ST Knock Retard around shift points and maybe elsewhere but it should be for only a short period, recover quickly, and be about 3* or under. If you see more Knock retard than that or if it's constant then definitely add some fuel.

[HemiHorsePower]

Ram. I have similar mods as you , and i would say you can add 12% at 1-3.8 and do lean up 3% from 5-7, this really wakes up mine, i have major wheelspin off the line now, and it really drops into 4th hard at wot. These settings will give you aprox 12.8 to 13 all the way thu. Per my Innovate Wideband.
let me know.
HH

[RandTx]

...I agree, just got my DS yesterday and installed it on my 05 Hemi qc (142k miles)... I want to make sure 2nd prime delete doesn't screw up tranny...having interesting things happen when programming tho. (I've re-created this 3x before goin to bed)... the 91 performance tune goes in flawlessly without any modifications. When I change other parameters (idle, rev limiter, speed limiter...), it appears to program it in but at the end it asks to turn ignition on (on already), I'd hit select and it would ask again an again until it says it didn't do it and to unplug it or reboot.... now the interesting caveat, the modifications took... my idle raised (I've had very frequent stalling issues with my cam/head combo) and din't experience any stalls whatsoever (even did some revs to try it)... I must say tho, it does feel different (in a good way).... I'm hopin that this (with more custom tuning/tweaks) puts me over the top and gets my qc into 12's NA stock block (currently 13.35).....

you know...
If you are about crazy you could take the Sc tune max out th shift points then use predators modify stock tune only raise the rev limiter to 7K .
Prob still let it shift 1st to 2nd on it's own about 6K, ( but now without tapping the rev limiter in the process ) then manually hold 2nd to 6400 or so and hold 3rd as required to trap to trap a 104+ mph.
if you are that crazy that is

[HemiHorsePower]

can someone break down thie 2nd gear prime and how is bad for the tranny , if its not too much trouble , if im going about 55 and floor it , what's happening exactly?. did sc correct this, and how is it beneficial for regular driving?

[gomango]

Yeah, get rid of the second prime.

[~RAM~]

HH
U sure that would be fine for my truck?
Mine is an 05.
Would like some input cuz I wanna try it.
Truck seems to holding back.
an as for the 2nd prime. Ill test it for ya if ya need an 05.

[HemiHorsePower]

HH
U sure that would be fine for my truck?
Mine is an 05.
Would like some input cuz I wanna try it.
Truck seems to holding back.
an as for the 2nd prime. Ill test it for ya if ya need an 05.

oh yea, typically, the longtubes remove velocity, or backpressure from 1-4000 rpms or so during cam overlap. The majority of the air/fuel splashes out into the headers so you have no low end, by adding maybe start with 10% in the 1-3800 range you compensate for that. you should have some wheel spin hitting wot from a stop from this, i'm a little rich at the high end, 5-7000 range, so i lean up around 3%, this takes me from 11.1 to 12.6-8 allowing me to bury 120mph, then drop into 4rth gear at wot with engine to spare, still digging. Dont be crazy like me , try to do this on a dynometer, it's safer.
Oh yea, one more thing, get rid of that powerwire , you don't need that anymore!!!, All that does is resist your cai intake temp and trick ur pcm to think its 20 degrees colder than it really is. Now you have an interface to make those changes by yourself, its called the U7137!, all that thing is doing now, is making you dripping rich, geez ur probably at 10.1-6 at wot, not to mention wasting fuel, but you can fowl plugs also, power wire is mostly noticeable in closed loop, when your o2 sensors are gathering info and making constant adjustments to your air/fuel while driving at partial throttle, but when you go wot, geez, needless to say , your gonna be rich , thats the holding back feeling ur sensing. I would remove powerwire, go back to stock, then tune for 93, adjust parameters for engine only, go to wot fuel adjustments, ,,1-3800, , 10% richer, to the left, 4-4.800, leave alone for now, 5-7000, lean up 3%!!
that should be a noticeable difference in a good way!
good luck.

[~RAM~]

Hey man I appreciate the hell outta that.
Ill do it here in a lil an try to post up what it did.
I don't kno too much, so I figured plug it in, use the can tune an be off.
But theirs more lol.


EDIT: so nothin with the spark or anything either?