190lph, 660cc, stock fuel lines... Issues?

[RuBiCaNT5X]

Can anyone comment on a 190lph with 660cc and the stock fuel lines? Is there choking of the fuel at low throttle? I am getting knock no matter where I set my SAFC2 at (Keydiver compensated ECU for 660cc which also reads knock) from -9 to -3 on low throttle from 2100 - 2800 RPMs. The only thing I can think of is that the fuel injectors aren't getting enough at the lower throttle range because the stock fuel lines are too small... Does this make sense or am i drawing the wrong conclusions? I am planning on going to the SteveTek fuel line upgrade as soon as funds return....

 

[kpt4321]

What boost are you running, and how much airflow (if you have a datalogger)?

660's could probably max out a 190lph pump, but only if you're using everything that they have.

 

[doug]

I wouldn't think it's the fuel lines, especially with an upgraded pump. How old is the fuel filter? It may be clogged up some, and requiring more oomph to push enough fuel through it. Just a guess...

BTW, SteveTek himiself (Rigby on here) told me that you can get 90% of the benefit of the SteveTek fuel upgrade by only replacing from the stock filter to the rail. He said the hard line from the pump to the firewall isn't bad.

 

[RuBiCaNT5X]

Thanks for the replies fellas, I put a more thoughtful thread together with better data here... http://www.dsmtuners.com/forums/showthread.php?s=&threadid=113174