true :icon_tup:

there is such a thing as too much boost depending on turbo. turbos have efficiency ranges. But as for stock ports fd's have pretty big ports off the bat and depending on turbo you can achieve 700hp but choose your builder and tuner well.

here is a good example for you.
my setup.
stock block
brog warner s366 .91 a/r
fpr
hks twin power
meth
93 octane
21lbs making 476
550s and 1600s
beat on the motor for months until last week i hit a hudge dip in the road which messed up the flow on the meth and i blew a seal.
now it dodwel pinned and fresh seals new bearings and goopy apex seals.
thats how it is... yes you can so it. how long you can never know

Hmm...meth surge tank.....note to self.

^^ did you have the original 3 piece apex seals?

this ...
this ...
and this!

with respect, it's sort of a non-sensical question. there are too many variables: from turbo to your physical location.


EDIT:
actually, as you have it written: "how much boost is too much boost on a stock ported engine??", the answer is somewhat simple. whatever it takes to chuck a seal or bust up a housing.

The proper way to ask what you are wanting to know is to give very specific details about your setup and your power goals. Then everyone can help steer you in the right direction. The more details the better, if you expect someone to spend the time to give you a detailed response you should be willing to spend the time to write a detailed reply/post. I am sure the op is long gone but it still needed to be said.

How much boost on a stock ported motor?
 

We should know in a few weeks if I dont kill another motor. Just installed a stock ported REW in the 1st gen. S480 turbo, 90mm t-body with a JW intake. no pinning! unbreakable seals. Q16 fuel. And the plan is to see if the motor still makes power at 45psi. And hope it gets out of it's own way at 20psi. :blush:

Guys I need your experience, I have stock 13b turbo and I would like to set it up by GT3582 turbocharge. How much PSI will the engine can hold and do I need to change the injectors + the stock ecu?

To the OP, 15 psi on 93 octane (US). It will survive at higher levels but doesn't give you much safety margin. You never know when you get a bad tank of gas.

With aux injection pretty much the skies the limit. I run 23- 25 psi daily, and as high as 27 psi when my clutch feels up to the task. all with 93 pump fuel and water injection. Omar is running like 37 psi with pump fuel and water injection. Over 700 hp

On pump fuel alone play it safe

on cali pump fuel i would suggest 15-16psi as your peak. you can go higher with AI but a bad tank of gas will leave you with a 1 rotor limping home.

on E85, close to 30 psi. on 108, pick a number, any number.

I wish facebook had one too :)

Sum people can't make any power on a stock ported block...think about it

The port type/shape dictates the power band not absolute power. ( at least in any situation you are going to run into any time soon... as said before a bit of alcohol , perfect tunning and a gt42= 700rwhp on a stock block)

Having stock ports requires more MANIFOLD pressure to make the same power as a street,bridge,p-port. You will just do so at a different rpm.

Ie, Car A with stock ports and 15psi makes as much hp as car B, but car B has a ported engine and 12psi. Car A will shift a 7500rpm, car B shifts a 8500rpm.