How much boost can the stock fa20 handle?
 

I was wondering if anyone knew what the limit is on boosting a brz. I have a t3 6063 turbo pushing 6.6 psi on stock fueling making 278 whp. I’m planning on getting a boost controller and upgrade the injectors and fuel pump and I’m shooting towards 350-400 whp is that too much on the stock engine?

http://www.ft86club.com/forums/showthread.php?t=103574
http://www.ft86club.com/forums/showthread.php?t=38494
http://www.ft86club.com/forums/showthread.php?t=37077
http://www.ft86club.com/forums/showthread.php?t=42222
http://www.ft86club.com/forums/showthread.php?t=78361
http://www.ft86club.com/forums/showthread.php?t=67992
http://www.ft86club.com/forums/showthread.php?t=46778

Way to much information.

Simple answer, It will handle as much horse power as you can give it. Until it breaks.

😮😮😮

Stock power is what, 160-170 wheel on a good day, no way in hell the stock motor can handle 3 times that.

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higher octane

If you run e85 you should be able to hit 350 whp easy.

You said you only wanted around 250 at first (that's how everyone starts out).... pushed it to 278... now you want 350.... or 400.... then what? Either you blow the engine or want more. There's no stopping.

From all the threads I have read here, 278 is about the safe limit, then you will start to break shit. There's not only the engine and fueling, but driveline, gearbox, tranny etc etc. You're going down a rabbit hole that can only be filled with money.

So the only answer is- the stock engine will take however much money you want to shovel inside of it.

I'm a rare kind of guy. I'm making 300whp and I feel like that shit is a little too much.

When I was stock making 160whp the power was 6.5/10 for me.
Now at 295-300whp it's like 12/10...haha
I'm way more than happy.

I'm at 11 psi on Shell 93. But sometimes I hit 12.3 psi in cold weather

Tell us when you find it...

This ^^ is the only answer required!
Anything else is just anecdotal or speculation.
People have blown up at stock and others have run 400+ with no issues (none they will admit at any rate).
The more money you throw at the car the more likely it will survive.
/ thread.

I’m in utah and they don’t really have anywhere I can get e85 only 91

You know that gasoline engine rated for XXX HP does not run at XXX HP always. If you boost the engine to XXX HP and do street driving only, it might very well be okay. If you drive it on track frequently, it fails much sooner. So, the answer is "it depends". Every engine is different and when you are pushing design limits and deviating from the standard equipment, those differences are even more important. If you are boosting the engine, you are rolling your dice. Don't believe anybody if they say their engine is fine. If you had asked what supporting mods are important for the reliability of an engine boosted to a specific level, that would be a better discussion. Then, we could discuss the driving conditions, boost level, and corresponding modifications like oil cooler, catch can, radiator, forged pistons and rods, injectors, fuel pump, etc.

Now, if I say my engine is fine for street driving at 7-8 psi boost with a standard JRSC (factory tune), oil cooler and catch can, will you care? I rolled my dice and I am happy with it :)

It all boils down to risk and what any individual considers to be an acceptable level of it. Any change increases the level of risk. There are things you can do to mitigate some of that risk but it still increases. If a person understands the level of risk that doing or not doing something will create and can live with it then all is good. If they do not fully understand or push things above the level they are willing to accept then they will have a bad time when something goes wrong.
Contrary to popular belief there is very little that angers me but guys that push things too far, blow up an engine and then then whine and cry about it while trying to blame everything and everybody but themselves just pisses me off to no end. I just want to shout "You had to know you were raising the level of risk so what the hell is your problem now"! Don't even get me started on the ones that do it and then say "I am going back to stock for warranty".

Agreed, that is down right fraud.

I told my dealer if they would accept servicing my car the first time I went there after it was supercharged. They were happy to do that; they were even excited to see the car at dealer. I know they have every right to deny warranty if there is a problem. Once the original design was stretched to this extent, it is first of all my responsibility to keep it running and maintaining. But, I enjoy the car even more this way with a stronger feeling of ownership.