I have a question.....imagine that right lol.
While logging some runs on hptuners i notice at the higher rpms of second gear i get a rpm flux.
For example it went from 6576-6592-6553-6592-6618-6653 then shifted.
After a few logs i have noticed it does this every time at the top of second gear. Very little in first..so far only caught it once in 5 logs....
But everytime in second it does it. Not always those exact rpms but always drops a bit then comes back up then shifts.
What would cause this?

Also it seems every now and then and by this i mean two out of say 5 runs i got knock right before are right at the 2-3 shift.
Once was high like 5.4 and slowly went away till 111mph where i let out.
Another time was small like 1.4 and went away withing about 3-4mph.
Any ideas?
New to playing with everything and just looking for a litle help.

Oh and i think i need to up my lockup point above 35mph cause i get 8 degrees of knock everytime it locks at that low of a speed. But sometimes i get high knock in the upper 28ish mph area...ideas?
This is of course under very light throttle like 17-20% normally. Dang 3200 stall needs a bit of peddle to move her **** lol.

 

Any ideas?

 

How close are you coming to bouncing of the rev limits? Or maybe running out of fuel pressure...

 

Not very close to the rev limiter. It's set at 7200 and i shift at 6700.

 

This might help I saw it on the EFI forum, the thread was about hitting the rev limiter during WOT ****, you might want to check your tranny fuild.

Then again it may have no help whats so ever but worth a shot.

 

Mines overfilled a little bit. So i guess thats not gonna be it.

 

Do you have stock valvesprings? I wonder if the valves are starting to float?

 

is the knock just in second or do you get it before the 1-2 shift? Also do you have the converter locking under wot? Pretty sure he has 918's in the x-cab truck if thats the one you are logging. As far as the flux does it just log it in one frame or for a few frames?

 

I no longer have 918's i am now running a set of Stage II 317's from WCCH with duel springs. Patriot gold duels.
Anyway it's only in second gear none in first and it's right at the end of second and doesn't happen every time. But when it does it's a large amount of retard.
The flux is over like 3-4 frames by the way.No my converter does not lock under WOT.