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well he definitely showed me up with his roosts!
Personally,I think you will find that if the tps is off even a little bit,nothing you do will help. TPS must be right before anything else.No exceptions. You also want to get it running right before you even think about adding the t'bo.Personally I don't see how the maps are off 20+ percent no matter what you did with the exhaust.IMO,you have an air leak in the exhaust somewhere.
ok so I have been thinking about this too........ I cannot hear an exhaust leak and I know from my merged tube I made back to the tip doesn't have any leaks now or before because I was very careful to check the welds. 1 thing I have never checked is leaks in the crush rings on the header or the block offs for the emission ports. I will have to remove the cover I have there and spray some windex on those points to check them. I only say this because I have had the headers off twice and those crush rings are the original and evertime I mess with the tail pipe it moves the header up and down a little at the back of the motor. not much just a wiggle which if you look you can see them rock a hair up at the head and if they are leaking slightly they could leak especially at higher rpm up there. now a couple times in all the runs I have made, I have seen air blow out the air cleaner and pre clean balloons up but only a couple times on decal. I cannot remember the conditions when that happened ie. rpm, start up, free rev etc etc. back when this happened I thought it was a timing issue which is what prompted checking all. now a few times if it fires off and dies it will back fire and blow out the intake. it does not like the real cold air on cold start up! it went from like 76* yesterday to 20* and I had it outside all day and pulled it in after dark and I didn't know if I was going to get it to idle lol had give it throttle to keep it going to get it in but fired up just fine after being in the heated garage all night! lol just looked at the suggested map which is probably hosed after firing up in the cold last night and revving it it soo high by accident and now +7 to 15% and pulling fuel in other areas. I could smell the fuel as the wind carried it by last night. I will check for leaks in the ex and 0 the map to stock and set it to auto tune again at the dunes when I can work it through all.
The air cleaner ballooning may or may not be an issue.Call me sometime. I just typed almost a zillion words on this lost the text. Not going to retype it.
Have you used an analog multimeter to check the TPS? I say analog so you can see how smooth the sweep is across the full range of idle to WOT. If it is not smooth as silk across the full sweep,ANY jerkiness in the sweep, ,there is your issue. Possibly,quite possibly. I had to replace mine due to this.