My setup is a 60trim .68hotside streetported s5 s4 hybrid motor on e85. ECU is a Microtech Lt8s

Some immediate background to this story.

I cracked my rear iron dowel pin, installed some solid dowels and rerouted my oil via my oil filter to my front iron.

Prior to discovering the crack I had been tuning the car on 16psi it ran great and pulled very well, but had an oil leak due to the dowel crack.

After installing the solid dowels I let the car warm up took the car out with an unknowingly dead alternator first time entering boost car immediately went lean and cut to one rotor. I dont even think we got to 10psi? tires were muddy so it just spun didn't really go anywhere.

Babied it home shut the car off. Plugged the computer into the microtech tried to start the car, it started on both rotors and ran fine???? Noticed my voltage was around 10.5 and realized my alternator was not charging my system. (Red top 1000ccamps... so It didnt really crank like it was low. )
Swapped to my spare alternator fixed the charging issue. tried to take the car back out and it studders rich and hesitates badly at any load above 0hg. Sounds like a subaru.

Pulled the turbo a little shaft play but no chips in the wheel. Pulled the exhaust manifold. Stuck my "camera on a stick" in the housings no scars all apex seals are still there.

Did i poop out a side seal or corner seal? Anyone had any experience with this? Just curious before I take this thing apart and its just some wiring issue.

 

You have a microtech. No voltage compensation.

So if your car ran normally with no alternator, its going to run extremely rich with the alternator working.

 

If the alternator was good when you tuned it and it has only just failed (assuming this is the case as I can't see you starting and running pumps etc for long without the alternator working, but it depends how much use the car has had), you leaned out on boost with the lower system voltage and cracked seals.

If the alternator was dead when you tuned it and you have now fitted a good one it will be way rich as above, probably have to take between 0.5 and 1 ms out of the fuel maps if that is the case.