Long story short, finished swapping in my lq9 last week, mods are circle d 3000 stall, longtubes, and a tune with a stock 4l60e (besides corvette servo). Truck is tuned, and runs great, but noticed something weird @wot. Idk if its a trans or something else. Basically if I lay into it, the motor will flash up, run till about 4700ish, fall back to about 4500rpms, then keep pulling. It doesn't like fall flat on its face, but its like the throttle backs off for a milli second. Let me know what you guys think, I hope the video works decent.

http://vid1374.photobucket.com/album...psndcz9y2f.mp4

 

Stock fuel pump?

 

walbro 255, and 52lb injectors. But I didn't think about that. Maybe ill run a fpg on it and take if for a spin.

 

Be worth checking. Also maybe log some runs if you have the software

 

I guess I overlooked the converter locking up at WOT, and that's all it is. All is well now that I know it's that and not something else.