how much boost on stock s4 turbo
 

I have a 87 s4 swapped in a na 87.
I was wondering how much boost I can push safely out of the stock turbo. I have the microtech lt10s, downpipe, straight through cat, and walbro 255.

i have heard that it can support up to 14.lbs of boost (pushing it)

i have a 88 s4 turbo with an lt12s i will be doing the same

i would puch it over 12 psi. turbo is just about out of steem and will start to heat up the intercooler.. but 14 is saposed to be the max

i appreciate the replies. i just got into the rx7 scene and am trying to figure it all out. also, is it hard to tune the microtech? ive seen a few base maps on here that people posted but that seems to easy.

I would invest in some more supporting mods before raising the boost any... After all the bolt on airflow mods are done, you should already be seeing 9-11psi with a ported wastegate... I wouldn't go much higher than that on the stock injectors... The Microtech helps out alot, but it's nice to have that safety cushion of knowing you have some beefy secondaries... :)