Ok, first few rounds of questions i'll post this, this is not my car i'm working on, but my DSM knowledge is fairly deep.
1992 AWD GSX with LSD and ABS 6/4 combo with a 5 speed. 2.5 turbo back Custom Exauhst with Boost controler. Other then that, stock.
After the 2.5 TB the car went from 11psi to 15psi, and if you give it too much gas it gives you 20psi of hellishly hot air. So, i know the fix for this is Porting out the O2 pipe, and even the turbo exauhst housing a little. My question, do i have to remove the turbo in order to do this porting? Or can i get by with unscrewing the center section, removing the bolts to the exauhst, and just remove the exauhst housing?
My second question, how much should you port off? I've check on VFAQ and they show pictures, and i've read around on other forms(MachV) and havn't got much to go by other then pictures, and "Your gut feelign". Will porting too much off hurt the turbo much? A 16g is in plans in the future, but i'd hate to mess the car up so i couldn't joy ride in it once in a while.
Thirdly, i know the first gen manifolds are prone to cracking, and with this said, i may be removing the 1g stock manifold and since i lack the funds for a 2g, would porting the 1g out just a hair help performance some? I don't think it will kill me to have a small crack, seeing as i'm missing the top bolt on the passengers side, and already an losing plenty of exauhst.(mind you, i'm still creeping to 20psi) But when the manifold comes off, if it does for the turbo, i'll be extracting that bolt and throwing a new one in there.
Thanks in advance for any answers, and don't be afraid to talk like i know what i'm dealing with. I've read up on DSM's for 4+ years and worked on a 1.8l, so you can use the technical Jargin.
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