Hello everyone I need some help
jwt 530
Air lift
southbend 6 puck clutch
south bend flywheel
plenum

I checked my plugs and for vacuum/boost leaks. No check engine light. **** sound clip below. You can hear shutter after the shift and wot

 

Here is a possibility. Jim Wolf had found early on that running boost can cause the ECU to go into limp home mode due to the MAF generating higher than expected voltage.
http://www.jimwolftechnology.com/wol...E_4700_RPM.pdf
I experienced it myself after upping the boost level and it throws no codes. The cure is a MAF voltage clamp to prevent it from exceeding the expected range. Mine took a time reset to fix the ECU. It sounds like yours was only temporary but who knows. For what its worth.

 

Does it do that from a slow roll or just after a shift? wondering if your clutch isn't clamping under torque. My 6.2l turbo mustang was doing that at lower RPM's and I burned up a couple clutch & flywheels until I went twin disc. But it was also making over 600ft/lbs tq haha

If it was maxing the MAF voltage and going into limp you would have to reset the ECU, I know this because I have hit the limit before and I clamped the MAF to fix the issue.

 

Mine for sure was not a clutch issue since It doesn't have one. The limp home modet hit at peak wot/boost just before a shift point and left no codes but the motor would not run over about 2500 until the ECU did a time reset. The tech article by Wolf said the same thing about no codes. Your experience was differant but I threw this out becasue of it occurring at the top of the curve.

 

Hard to tell from the 1 sec audio clip. Does it do it every shift and at around 4500-4700 peak torque? What are you tuning with?

 

yes every shift at about full load in 1st, 2nd and 3rd. I’m currently running the JWT split second piggy back

here is the whole clip. Right after the the first shift