HP Tuners for 2005-2015

this would be useful. my biggest gripe is when going up hills and cruise control. trans drops a gear to regain speed then upshifts again (while still on hill) only to downshift again. STUPID. ecu should look at the load and see that it hasnt dropped a reasonable amount to estimate the ground leveling out

 

Hmm, in Texas we don’t have hills. Well, there are overpasses.

 

You definitely have the ability to adjust how much throttle it takes before it tries to downshift. Not saying you want it to, but you can tell it basically "don't downshift until WOT" if that's what you wanted it to do.

 

And thats per gear shift it can be set? So 4->3 and 5->4 can be different? Realiatically i dont want either to downshift unless the truck is being commanded 100%. But i dont want it to upshift again until the engine load goes down which would be the trickier part.

 

Yes, upshift and downshift throttle positions can be set individually and can be different for each gear. You can also tell the torque converter when you want it to lock and unlock in each gear. That weird thing it does in 3rd where it shift and then the RPM goes up can be adjusted too.

 

Deal. Sounds like i might be buying one soon and using it on both my vehicles.

 

Just remember that values you see in the transmission tables are for the driveshaft speed, not engine RPM. So you have to think about what gear you are in, and do the math against that gear ratio in order to select a certain engine RPM. Also have to account for toque converter slip. So if say I want the 2nd gear WOT to shift to 3rd at 5600 RPM, I need to do the math to get it it to shift at 5600 RPM, but subtract a feww hundred RPM to account for slip.

 

cool. ill reach out im sure if i have questions. didnt you post that formula in here?

just ordered...will be doing sai delete too cause fuck that stuff. @Roostfactor can i get a blockoff plate?

too bad the tacoma needs more credits than my gto

 

Much of the issues with the cruise control are the fact the coding for it makes it slow to react, not necessarily the trans. For the case of it hunting while going up hill, the problem is it allows the truck to slow down too much, then goes, crap im going way to slow, needs tons of gas, drops a gear or two while keeping way too much throttle, then blows by the target speed and lets off the throttle and repeats the process all over again. Anytime im using cruise control and see a hill coming up that i know the truck will not make it up in 5th locked, i pop it over to 4th in the flats, which allows the truck to get into 4th locked, and the cruise control can keep the same speed up the hill without hunting because it can get back to target speed without as much gas.

I have always wondered why there isnt a 3rd gear torque converter locked state. 4th and 5th the torque converter lockup clutch can do its thing if all the conditions are met, but somewhat here n there ill find myself needing 3rd to pull hills (whether towing up the grapevine, or loaded up pulling the shirwin grade in altitude, or both) and always wished that 3rd would also lockup to keep trans temps down. Do you think it would be possible for us to add this?!?!?

Good to know! Driveshaft speed, check!

 

Can you provide me/us with instruction on how to do just this? PM if necessary so I don't clutter up the thread with too much personalized stuff.

Looking forward to playing with these parameters on JustDSM's version 3.0 tune for me (which is running @#$%ing outstanding, BTW).

 

Sure can, send me a PM with full name and address and I will send you my Paypal. Im shipping a set out today.

 

I basically use 3rd gear at near WOT for at least 2, 2-5 minute intervals everyday. I'd LOVE this info/modification (and I know my A750 would too).

 

i agree with your statement. im just thinking this is going to be a way around it since the cruise control logic cant be modified. essentially just make it hold the lower gear until it reaches the preset again. usually going up a hill is pretty high throttle so it should be manageable to set a lower a number to where it drops under (reaching level) then upshifts

 

It would definitely help this case (of cruise hunting) to say hold the gear 200rpms more, so cruise can "catch up" and go oh, well let me slow down and have the trans not try to upshift again.

 

if i can get this to work it means ill have a useable 5th again on the highway (315s and stock gears arent exactly the friendliest for 5th gear)

 

You should definitely get a supercharger. It'll hold gears all day long going up hills.....

Edit: and Gears...

 

yeah 315's and stock gears are NOT helping at all.

 

Yeah, I responded then saw the post about stock gears. Hell even with the supercharger I couldn't hold 5th on level ground on the freeway with 315's. Gears then supercharger, it's decided.

 

This is exciting. Read a lot of this thread, but not all.
But I gotta play Devils Advocate. Is there any concern with everyone all at once dramatically changing these tunes away from the TRD/ UCON tunes that have shown to be reliable for over a decade? Albeit Pig Rich. I see all these claims of increased MPGs, HP, and throttle response. Is there issues with people running cats and having them burn out? Have there been any Dyno runs to prove the effectiveness of the adjustments? Is there anything that can be learned/ carried over from the findings of Gadget/ Scott and the specifics of the 1GR; like cyclinder variation.
Trying to justify ditching the UCON but want some Data. Is there any benefit of running the UCON with the HPtuner, like logging, 7th inj control?

 

Great questions, all of them........I think more time and testing is going to be required. It does all seem too good to be true, time will tell on the reliability aspect. I have the UCON as well, and the HPTuner/Flow matched injectors in cue. I'm going to wait for a little more information before I get too far. I'd like to see what a good tune on this setup produces.... I am intrigued by the increased fuel mileage. Ever since I upgraded to all my listed high performance goodies, my mileage is absolutely terrible. I would be willing to back off the peak horse power figure for some of the drive-ability improvements the HPtuner seems to offer....Then again, maybe I won't have to give that up.