If the range isn't there in the software, there's nothing you can do about it... Get a VVT cam ground with advance and retard the rest of the surface accordingly. Cam phasing rate has nothing to do with being able to advance the cam below 0 degrees. It's just something you need to pay attention to when performing the calibration. At steady state, the cam angle will equal the target angle. But during a large transient after you're all wrapped up with the legwork, you're not going to be steady state...you're going to be running it hard. You might be revving the engine faster than the cam can move to its target position...so you need to make sure you're calibrating the VVE surface for times when the cam angle error is nonzero. You've got transient fuel...think of this as transient cam angle.

 

Damm i wish you were closer, I'd love
for you to look at my VVT calibrations.

 

If only you could use some sort of instant electronic mailing system to send him your files to look at

 

I don't have HPT, I also like the tuner to drive
the truck and do there magic in person.

 

You are in Philly, right? I am a dealer for HPT if you want to get your own interface, fwiw

 

Yes i live in Philly, I'm not that computer savvy.(72yrs old)
I don;t have good luck with that kind of stuff. I all ready
had the truck Dyno and street tuned, happy with the tune.
truck runs great. just wondering about the VVT settings.
after reading the article posted by Smoke. maybe i could
get a little more. Tuner did move the cam specs around.

 

You have a really cool and bass *** truck for a young timer.

 

figured this is as good a place as any to ask a mechanical vvt question.

Compcams limiters for Gen IV they have a 5456 and a 5460, two different blocks for two different actuators .
TSP insisted i needed the 5456 block (early pre-09 L92) for my 2012 L94. They may have taken it into consideration while grinding the cam but here is my issue.

the 5456 says it retains 16* of retard, per comp cams, for that actuator (62* total) so the block would "take up" 46* of rotation.

I used that block in my later actuator, per TSP recommendation, which only has a total of 52* of retard, meaning I can only physically retard the cam 6* from park position leaving me 1-2* advance at most

confirmed this with a quick log and commanded 10* of retard, maxes out at 6*. going to see how it works out, TSP cam angle table they send out maxes out at 6* so pretty sure this is considered into it

 

I posted this question a few days ago on HP's forum but have not received any response yet, and then found this post. Is it necessary to update the VVE charts for every cam angle? I first thought this was the case, and so I built filters into my graphs to separate the cam angles as smokeshow indicated. But I see that when I update only the intake cam 0 chart, all of the other ones at different cam angles change along with it. Therefore I am concerned that I would be multiplying my percentage change, 8x in my case which is the max cam retard that I am going.

 

I have noticed that HPT sometimes has an issue with generating VVE coefficients where the ICL is nonzero. You may have to generate the coefficients manually or just use the old bluecat tool.