Too much Boost???

[steve-o91tsi]

I was wandering what is the most boost i can push to my stock motor thaT hase ben bored 20 over? I have a walbro 255 fuel pump and Stock injectors? Please help

 

[JDNSBR]

I was wandering what is the most boost i can push to my stock motor thaT hase ben bored 20 over? I have a walbro 255 fuel pump and Stock injectors? Please help

Stock injectors? No more than 12-13lbs safely.

 

[steve-o91tsi]

TOO late i push 18 all day long and the thing runes fine but i am going to get new ingectors

 

[JDNSBR]

TOO late i push 18 all day long and the thing runes fine but i am going to get new ingectors

Ok, I am sure you are running lean. And you also need an AFPR with that 255.

 

[steve-o91tsi]

Sorry whats a AFPR

 

[JDNSBR]

Sorry whats a AFPR

AFPR = Adjustable Fuel Pressure Regulator. The 255 overuns the stock unit.

 

[steve-o91tsi]

so what would happen if i pushed 23 psi one or two runs

 

[JDNSBR]

so what would happen if i pushed 23 psi one or two runs

You will more or likely hit fuel cut or detonate. Running very lean is asking for trouble. This can cause excess heat and destroy your pistons. I would highly suggest turning down your boost untill you get injectors and some sort of fuel management.

 

[steve-o91tsi]

would the gm mas and the translator box alow me to manage the fuel enugh to manually tume it. Of course the injectors need to be replaced . I just hope i havent messed up any thing it is a new motor

 

[seefour]

Turn the boost back to 14lbs until you have a way of monitoring knock. Running 23lbs without any form of fuel management is just asking for trouble.

 

[steve-o91tsi]

will do thanks
the dattalogger is in the mail

 

[seefour]

Just remember the golden rule. Knock=bad, and you'll be fine!

 

[kronus]

You will more or likely hit fuel cut or detonate. Running very lean is asking for trouble. This can cause excess heat and destroy your pistons. I would highly suggest turning down your boost untill you get injectors and some sort of fuel management.

Also, you might want to keep that boost turned down until you read up a little more on your car, what not to do, and consequences of doing what you shouldn't. That's hardcore beating on your car. And your car is very illprepared.