I'm running a 4lb pulley, 93 octane, and a custom JLP Predator tune. Runs good with no pinging. I datalogged with my Predator and got 14 degrees at WOT. I'm attempting to advance the timing a little bit more by modifying the tune and then reinstalling it. However it stays at 14* WOT.

Is it some how locked?

How does 14* degrees sound for 93 octane and a 4lb?

Thank you

 

Welcome to the infamous cant adjust your timing with Predator for ***** club. It's a bug in the programmer.
The only things that actually adjust correctly is the fuel parimiters. I know since I use in conjunction with my Wideband.

P.S I run 18* of timing most of the year..I have a 16* for the cold winter months.

 

Thanks Bird.

That sucks! What are the guys doing who claim that they retard 10% with the Predator pulley tune?

So the only way to modify it is for the tuner to do so?

Thanks!

 

It takes out or puts in less then 1* hence the reason you see no real change.
The fuel on the other hand is what keeps the detonation away. My dyno tune from JL has me @ 11.4 on my wideband with no adjustments. If I add 10% fuel I burry the A/F meter below 10.0. At 5% added fuel it puts me arround 10.7-11.0 or so.
Going the other way if I leaned it out I'm sure I could see 13.0 or so easy.

So YES the way to get more timing is to get a tuner to bump it up some.

 

Okay, now that makes sense (less than 1*). Hmm, I think I want a wideband next.

Thanks a lot for the help Bird!

 

Wait for the Xcalibrator 2, or buy the current Xcalibrator, you may be a little happier. I may actually invest in one here soon.

 

ditto. It does take out 10%, but 10% is almost nothing with timing. I did see a difference from 18 to 17, but that still wasn't enough to keep me from detonating this winter. Still had to call for a winter tune. Any big changes will still require you to call your tuner.

However, if you have an issue with your current tune from JLP, just let them know. All I will say is that they have been MORE than fair with tuning adjustments with me, and any time you buy new parts from them, they will also take care of you.

I recommend just giving them a call.

 

must be nice.

Chris

 

I had a similar experience. It seems to have more to do with the setting on the "lock" than anything. I had a JLP tune that wouldn't adjust on the timing. I was very happy with the tune, I just wanted to try a little more timing.

Since then, I have gone with a local dyno tune done by Willie Figueroa who works for Diablosport out of West Palm Beach, Florida. I now have the adjustability on the timing (+/- 10%).

I would also like to add that I found out that when these trucks are the least bit cool (engine temperature wise) that you will see approximately a degree more of timing, as compared to when they get a little hotter. I used to not believe this (not) to be true, but with as much as I have monitored timing, I have come to be a believer.

By the way, on 93 octane (4-6 lb lower), it seems that 16 degrees WOT is the max across the board safe for most trucks. I've heard that the older model/year you have, the more timing you can get away with. Mine's an 04, so as I understand it, the 03-04's are a little more sensitive to timing than older ones, and the farther back you go, the more timing you can run (up to a point). If I go to 17 degrees WOT, I get light ping at the top of second gear, and upper end of 3rd gear, where the motor labors most.