how much boost on 8:5;1 ross pistons

[awd93talon]

i have a build lower end and im running 15 psi with a 255 and stock inj. im getting 20 counts of knock in 2nd and it go up to 43, just want to know if the 510 inj with help

 

[bigdogg2834]

If you are still on the 14b turbo in your profile, I doubt you are knocking because you are lean. You are probably knocking from runnning rich because I assume you are running that 255 with no AFPR. What are you using to log and tune? You should be able to look at your afr and see if you are lean or rich. I hope this helps a little but without more information like do you have an AFPR with your 255 pump and what are you tuning and logging with it's hard to know exactly what the problem could be. Give a little more info and we can figure it out.

 

[awd93talon]

in my old never had a afpr or in my friends car, ya i know every car is different. ill post a log but i gotta get the stuff on my cpu again. i have mmcd, i belive its lean because its reading .88 volts when its starts to knock. but i have a world of problems.

my intake mani was black and looked wet inside.( i blocked of the erg)
i had a ton of carbon on the #4 cylinder exh side build up on top of the valves