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9 psi with an NA



9PSI isn't a lot. I was running 11 on my L26 with a topswap.

I only have 42.5# injectors, I don't know why you couldn't get away with the same.

You'll probably want to replace the timing chain and put a higher pound spring in the heads.


Last but not least, ditch the MSD coils for stock, they are notorious for having issues.
 
If you're going with 65# injectors or larger, you may as well run E85 thus giving you more headroom with boost at that compression ratio.
Now the transmission is a different story.
 
9 psi if tuned right, looking at high 12's. May want an intercooler, get a decent core and then piping from ebay to keep it around $300-400 total for an a/a.

M90 boost #'s are irrelevant to turbo boost #'s, many things that change.
 


Hey victor, i was looking at your cardomain site of the Prix and noticed you had a custom tune. Did you get a custom dyno tune or did you get a canned tune?
 


Classy Pontiac said:
Hey victor, i was looking at your cardomain site of the Prix and noticed you had a custom tune. Did you get a custom dyno tune or did you get a canned tune?
Click to expand...

I started with the canned tune from ZZP that comes with the turbo kits. That got me to 115 traps and 15psi with no knock. Afterwords a friend of mine worked on the tune to straighten a few things out, like leaning the car out some for more power.
 
im not so sure i understand why this thread is based around a certain level of boost. if you run a turbo, you should have a boost controller. therefore you run whatever you can before it knocks, unless im just completely retarded and you base a motor build around running a certain boost level (which would be stupid as hell).
 
Bio, i will have a boost controller but right now the wastegate i have has a minimum psi of 9 psi because the spring in the wastegate is a 9 pound spring. I just wanted to know if a stock l26 could even handle 9 psi.

Thanks victor for the reply. Thats all i needed to know about the tuning part.
 


You would have some major trouble handling "30psi" on a NA car with anything...

Most any of my SC blocks can realistically make power at is about 22psi with a decent cam. Anything more than 20psi on a NA block without a decent cam is overkill.... anything over 25psi with a decent set of heads/cam is 900hp.
 
Fuel (octane), tune and the temperature of the air coming through the throttle body play the largest part.
 
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