So, I have come to a crossroads in my turbo build. Cut the "shelf" to make a downpipe fit on my manifold, or sell my manifold and buy a new (likely log) one. I'm curious who all has cut theirs, and how much. Looking at the previous threads that pop up, it seems like most people either cut the sheet metal only to the bulkhead, or remove everything all the way back to the firewall. "Every v8 miata has them cut out"
In order for mine to fit, it is going to take at least the 1/2" sheet metal area, and only if I switch to a smaller diameter dp or to a SGDP. If I go with the 3" downpipe as planned, a fair bit would have to be removed.
What i'm looking for is people who I have actually removed it to say:
"Cut that bitch entirely out" or "Cut back 1" into the bulkhead"
Any reinforcements done:
Gusset plates, etc.
Any opinions on why this shouldn't be done, or why it is acceptable are also welcome.
EDIT: Bonus props for pictures.
Picture of my personal situation. Even removing the v-band and welding straight to the 3" reducer, not much room. Welding a SGDP to a segregated flange still won't really leave much room.