Fuel pressure fixed knock

[L917]

Hi,

I run a tt chip with #60 inj and 255 walbro with hotwire. When pushing her hard (around 15# of boost) she was knocking per my scan master. I turned up the fuel pressure to 45psi (without vacuum) and knock is gone.

Does this make sense? The instructions and common wisdom is 43.5psi on fuel pressure.

Fyi- i have a blm stuck at 140 and o2 levels seem high (+850) sometimes. i think its preturbo leak, as when i ran smoke through 3 way spliter, smoke came out from under the turbo and my intake k&n filter.

 

[626gn]

Lot's of guys get stuck on the 43 psi thing. It was meant to be a starting point. Not necessarily where every car should be.

 

[larrym]

Extender chips call for starting at 45 psi

 

[GNRick]

To smoke check, remove K&N, attach a latex glove and secure it with the hose clamp from the K&N. Every GN owner should own a smoke machine. Bought mine off Craig's List years ago.

 

[Chuck Leeper]

To smoke check, remove K&N, attach a latex glove and secure it with the hose clamp from the K&N. Every GN owner should own a smoke machine. Bought mine off Craig's List years ago.

Hey Rick, it look anything like this one??