is just fully rebuilt my '90 turbo II, and got a large streetport done. so everything else is completely stock (turbo, ecu). is it safe to run stock ecu with that port done. or should i get some type of piggy-back or stand alone as soon as possible.
by the way, i'm not running the car hard at all (max 6.5k shifts, if ever).

 

Porting jobs vary so much, it's hard to say just how "large" large is, but I wouldn't worry too much about running lean unless you're running a lot more than stock boost without much in the way of fuel upgrades.

 

What about the mazda trix large street port template would you consider that large? Just wanted to know cuz I"m buy that in a few months when I rebuild my engine.

 

I was under the impression that a stock ecu wouldn't run a ported motor? I don't really have any knowledge in this department but when I got my engine built they made sure I had an aftermarket ecu before they did the work

 

it'll run a ported motor fine, you just need to watch for boost creep if you open up the exhaust.

 

If you're on the stock turbo, then the stock ECU will be fine. You'll need larger secondaries, upgraded pump and then some way to control it (S-AFC....). Also port that wastegate and get an FCD.