Topic: Pass Times W/ Tuners

[KY_BOB]

I wish one of you guys was an expert at tuning a 6L80 transmission.  It's a different beast. I'm still debating on tackling it myself or seeking professional help.  Even though the trans has a good reputation I feel like I need to firm up the shifts before tinkering with the engine.

[MyBigToy]

I haven't looked yet at the log I did tonight with my latest tune, but if I'm still not seeing KR I'm going to take a peak at Bob's tune.  I think I'm getting over 10 degrees pulled due to the IATs.

You can't do much about that this time of year, except turn on the meth, which I've never gotten since I bought the intercooled supercharger. Magnacharger says meth will take the coating off the rotors and I don't want to do anything that might damage them. There are plenty of guys who have run meth and didn't have problems (or so they indicated) but over time it's pretty corrosive stuff on aluminum.

[MyBigToy]

I wish one of you guys was an expert at tuning a 6L80 transmission.  It's a different beast. I'm still debating on tackling it myself or seeking professional help.  Even though the trans has a good reputation I feel like I need to firm up the shifts before tinkering with the engine.

I wasn't kidding about all of the inter-related tables for the tranny, was I? That's why I decided I'll go the route of the $149 tune for the Vette if I decide I'm going to do something with it. I don't care that much about the horsepower (even though that $149 tune includes the engine tune also) because it's already got more than you can sanely use on the street, but the tranny is LAZY, especially at light throttle.

[KY_BOB]

I wasn't kidding about all of the inter-related tables for the tranny, was I? That's why I decided I'll go the route of the $149 tune for the Vette if I decide I'm going to do something with it. I don't care that much about the horsepower (even though that $149 tune includes the engine tune also) because it's already got more than you can sanely use on the street, but the tranny is LAZY, especially at light throttle.

You weren't kidding.  I spent about 3 hours reading up on A6 tuning on HPT forum and am still lost about the TM.  Apparently, the TM commanded by the TCM has nothing to do with reducing slippage in but is purely there for comfort and there is no harm in deleting it.  It will not cause longer slower shifts, only harsher shifts. (the opposite of what would happen by deleting TM alone on a 4L60) The desired shift time and some of the multiplier tables have to be used to actually make quicker and even harsher shifts.  My brain is still spinning from reading that night.

Then throw in that the low octane timing tables are made for crappy gas, hot weather, and heavy towing.  The high octane table is made for good conditions and 105 octane E85.  There are 2 PE tables, one for gas and one for E85 and multipliers for different % mixtures.  The engine tuning is going to be quite different as well. 

[Main One]

I shut off the P01514 Code (Bad correlation of MAF to VE table I believe) because I was tripping it and getting Reduced Engine Power engaged.  Seems that I can shut off getting the Service Engine Soon light to come on, but not stop the Reduced Engine Power by simply shutting off that code.  Got Reduced Engine Power 4 or 5 times on the way to work today.  It can be reset by simply shutting the engine off for a few seconds, but after the 2nd time it was very annoying.  Luckily I had my HPTuners Pro interface in the truck and I captured 2 of the times in logs to look at this evening.  I didn't change anything in this tune compared to the last other than timing, and that was only at or above 3000 rpm.  I wasn't running that hard when Reduced Engine Power kicked in.

[FordsDrivingChevys]

M1 failed to tell you that he now has KY_Bob's supercharger on his truck......

If you show up to Bratfest you should get to see at least two supercharged trucks - that is, if Blue gets his out of garage storage, where it sits most of the time. Mine will be there. M1 hasn't committed yet as to whether he'll show up or not. My truck hasn't been on the dyno but my guess is that I'm around 475-480 crank horsepower. I was planning to take it to Gateway this summer and run it in the 1/4 to find out what it would do but we all know what happened there. 

If you can't talk the wife into showing up, bring the Duramax. I'd love to take a peek at it.

I was thinking the same thing if she decides not to go. I'd love to check out everyones builds! Looks like we're close in HP when I bump up to level 5 and play (+about 750 ft/lbs torque). For DD I run it safe on level 3 giving me 430's which is still fun . Sucks about Gateway. A lot of disappointment

[MyBigToy]

I shut off the P01514 Code (Bad correlation of MAF to VE table I believe) because I was tripping it and getting Reduced Engine Power engaged.  Seems that I can shut off getting the Service Engine Soon light to come on, but not stop the Reduced Engine Power by simply shutting off that code.  Got Reduced Engine Power 4 or 5 times on the way to work today.  It can be reset by simply shutting the engine off for a few seconds, but after the 2nd time it was very annoying.  Luckily I had my HPTuners Pro interface in the truck and I captured 2 of the times in logs to look at this evening.  I didn't change anything in this tune compared to the last other than timing, and that was only at or above 3000 rpm.  I wasn't running that hard when Reduced Engine Power kicked in.

Stupid question, but I'll ask it anyway. Could your MAF just be dirty?

Have you started dialing your VE table in for the additional airflow for the supercharger? What did you start with for your base supercharger tune? Maybe KY_Bob's Vortec tune would be a good place to look to see what the differences are between yours and his. Your cam is slightly more aggressive than his but I'm sure it's not enough to make much difference. I'm sure you've already thought about these things but it never hurts to have some help (NOT that I'd be considered that much help since you know way more about tuning & theory than I do).

[KY_BOB]

I shut off the P01514 Code (Bad correlation of MAF to VE table I believe) because I was tripping it and getting Reduced Engine Power engaged.  Seems that I can shut off getting the Service Engine Soon light to come on, but not stop the Reduced Engine Power by simply shutting off that code.  Got Reduced Engine Power 4 or 5 times on the way to work today.  It can be reset by simply shutting the engine off for a few seconds, but after the 2nd time it was very annoying.  Luckily I had my HPTuners Pro interface in the truck and I captured 2 of the times in logs to look at this evening.  I didn't change anything in this tune compared to the last other than timing, and that was only at or above 3000 rpm.  I wasn't running that hard when Reduced Engine Power kicked in.

Just curious, were you logging MAF hrz at the time that it acted up?  Just wondering if you got any crazy readings like a bad connection. 

[Main One]

Well, I was a bit off in the name for the P01514 code, it's airflow correlation to throttle opening, not MAF to VE table.  I found on the airflow tab under the Engine Diagnostics window a table for max airflow by if I recall correctly throttle position and rpm.  It was even identified in HPTuners as for the P01514 error as well as one other one.  I multipled all values in the table by 1.5 - will be putting that tune in shortly.  Seems to make sense that I am pushing more airflow through the throttle body when there's some positive pressure as compared to ambient helping to push the air through and with that table defining when to set the code that I would need to bump it up.

As far as comparing to another tune, for timing so far been looking mostly at a FlaBuoy tune that I picked up at some point, either directly or through Bob.