Going past rev limit not shifting at WOT after 16g install

[noid]

Car- Automatic 96 gst with 7 bolt, Small 16g turbo (12 psi spikes around 15psi), 1g BOV, K&N Air Filter, metal intake, FMIC short route, Full 3inch Exhaust, EGR block off, rebuilt head (evo 8 springs and lifters, stock cams, SS valves)

Problem- After I rebuilt the head, changed the timing components and installed a small 16g the car goes past the rev limit at WOT. With the T25 the car would shift around 7k at WOT. Now at WOT it revs past 7k and it almost reached 8k (appox 7700) before i noticed and let off the gas. At 3/4 throttle it will shift at 7k.

Wondering if anyone had any ideas on what would cause this and/or how to fix this. Thank you for any advice you can give.

 

[shakeandbake]

Does it shift normally at cruise? Is everything plugged back together?

 

[noid]

Yeah it shifts normally while cruising. The only issue is at WOT.

 

[1G Eclipse94928]

Yeah it shifts normally while cruising. The only issue is at WOT.

You should open up your ecu and see if its been tuned.

 

[rEclipserGST]

Yeah it shifts normally while cruising. The only issue is at WOT.

I would venture to blame it on the bigger turbo causing this lag in shifting. I ended up chipping my TCU, and it solved this issue. My car shifts firm at 7K when going WOT. My profile is up to date.

 

[noid]

Thank you for your replies. I think I'm going to attempt the blue wire mod on a switch and see if that helps any. Thank you again everyone!!!

 

[o0GuitarKid0o]

Let me no how it goes thanks

 

[noid]

Just to update. I didn't do the blue wire mod. Instead I bought a shift box from "Forced four" at WOT when I use the shift box it works GREAT. Shifts when I want it to and at full pressure.

 

[donniekak]

How exactly does an engine go past the rev limiter under throttle?

 

[noid]

I have no idea why it was doing it. It's an automatic so under partial throttle it shifts before redline. However at WOT it was going until I let off and than it would shift. Highest it got was near 8k. But now that I have the shift box I no longer need to worry about why

 

[thomcasey]

Kiggly blue-wire-mod or a shift box is needed here