Thor Forums

[Chance]

Originally Posted by Long & Winding road

I can see your point but it does "seem" like its using more fuel efficent at a lower RPMs. If the engine is spinning faster, the intake and exhaust are sucking in and exhaling more so therefore more fuel being burnt? I dont know but it make sense.

.....cut.....

Your post made me smile — thanks.

You said you see my point, but then disagreed or questioned what I said as being incorrect. Which by the way is 100% OK with me. It’s a good thing.

I don’t have, and have never seen, a BSFC Map for the Ford V10, but take a look at this for another engine and see if it makes sense to you. The numbers will be different, but the general shape and principles are similar.

My previous comment may make more sense once you understand how most engines perform under different loads and speeds. If you have questions or want to discuss the technical aspects, please let me know.

The bottom line is that transmissions have gears for a reason. Ford engineers know the advantages of gear changes to vary speed and torque on engine, which is why they keep adding more gears. If they didn’t expect and want shifts, they wouldn’t be going from 6- to 10-speed.

Map below is for another older engine, not Ford V10.