OK, the 76mm is on the 8.1L agian. I'm using the same tune as I did last time when It ran much better. This time, mid throttle is GREAT, but WOT is horrible. Slower than it is N/A. Could it be due to timing or fuel? Wich is more of the suspect?

 

gotta be in the tune...have it checked.

 

We need more information than that lol. I think the easiest way would be to get a video of what happens at WOT, but I wouldn't recommend it until we know for sure you aren't going to hurt anything going WOT again. Do you have a wideband, or anything to diagnose problems with? Maybe a friend with tuning software?

 

Cats clogged?

 

Dont think it has cats.

I would guess tune, get a wideband

 

Maybe the 75mm is not feeding enough air to keep the 8.1 happy on the top end.

 

OK, cats are still there unfortunatly....gettin them gutted asap! The turbo makes all the boost I need, it will out preform what Im aiming to do. Spiked it to like 15 by accident one time. And Ive had many WOT runs....and havent hurt anything yet.....YET! I need a GOOD tune mostly, Im saving up for a BBP tune, but I have to work with what I have right now. So dont give me hell on the tune, I KNOW IT SUCKS haha. Its a Diablo Predator Tune. Made just for the Boosted 8.1L. But the guy said it was Super Conservative tune so Im think this might be the prob. But last time I had the turbo on I was having the exact opposite problems. I was only making power at WOT, but I was stupidly pushing like 12lbs. Same tune.
I have NO wideband or AFR gauge...Im seriously in need of one. Only have Boost and EGT at the moment. If I just get an AFR guage, what should I be looking for? And when?

 

Is it missing? Or just have no power?? I'd be willing to bet you're either seeing a lot of KR or blowing the spark all over the place (plugs not gapped right)

 

He didn't say top end, he said full throttle (Wide Open Throttle). That could mean any rpm. Maybe he means top end?

 

Any way you can data log? Do you have a WB to monitor AFR?