Knocking At 3500 Rpm To 4500 Rpm

[RipNGrip]

Hey guys,

I have a rb20det gts-4 and have recently being using two drive for well.....advanced circular movement. I have recently developed a repeative knocking between 3500 and 4500 rpm in or out of gear. I was wondering if it is the flywheel or maybe something internal with the engine but she revs fine... feels normal.

any help would be awesome

[RipNGrip]

Welll,,,,,,,,,,,,,, its offical my engine is now knocking at idle and has lost power! i think i have destroyed the Almighty rb20

[Duncan]

oh well $500 for a new one and off you go again. make sure your fuel pump and injectors are in good condition. not sure why it is showing knock at idle though...do you mean you can hear it?

[RipNGrip]

yeh... knocking and grinding now throughout the rev range. yeh injectors are old new walbro pump. gts-4 so not easy to find.. thinking about a rb25 atuo froma stagea