What is Considered Low RPM Driving?
 

The bore scoring video had suggested that one hypothetical reason for bore scoring was low RPM operation. Something like piston rod angle if I recall. So, what is considered low RPM driving? My manual suggests shift points at 3K RPM. What about cruising RPM? Under 3K? Over 3K? Just curious about others opinions. I have a hard time shifting at 3K BTW. Usually 4K and over.

Thanks,
Kyle

I recall a post by a respected member of the forum noting don't drive above 3k RPM when cold and not below 3k RPM when warm...I subscribe...and don't give a rip about the gas mileage.

Perfect.

And avoid cruising at 2200-2400 rpm.

The builder of my engine, Flat6Innovations, advises: "This area of the RPM range (2,200-2,400 rpm) is where the most stress is placed on the valve train components due to the variocam arrangement which does cause accelerated wear of some components". So i don't cruise at that range and recommend to others to avoid doing that. Better safe than sorry.

I need to make a t-shirt that says "2200- 2400 = DUH-DUH-DUH-DANGER ZONE!"

I just put red tape over that section of my tach to remind myself to drive faster.

you have to remind yourself? :burnout:

I'm not convinced. Tips shift at much lower RPM and I don't believe they are more prone to bore scoring.

Valve train wear isn't the same as bore scoring.

So, I've been driving under 3K until it gets to operating temp and over 3k after reaching operating temp for the past two weeks. My mileage has increased by 2 MPG. The higher RPM seems to be more efficient?

I keep things 3K rpm and above cruising.

You should believe! This was discussed (might have been in the IMSB sticky) and explained a few months ago by some of the best in the business.