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Old 07-05-2019, 01:29 PM   #41
Senior Member
Brand: Thor Motor Coach
Model: Windsport 27K
State: Kentucky
Posts: 762
THOR #2817
Originally Posted by JamieGeek View Post
The V-10 is an overhead valve engine as such it just loves the high RPMs....
Overhead valve engines are, and have been common, but the V-10 also has a single overhead cam that promotes high RPMs. Perhaps it's the sound coming from the inside of the doghouse that causes me to avoid high revs.

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Old 07-05-2019, 03:04 PM   #42
Senior Member
Brand: Still Looking
Model: Newmar Bay Star Sport 300
State: Alabama
Posts: 3,079
THOR #6826
5 Star PCM Tuning for Ford V10 Gas

I did the 5 Star tune on my F53 with the 5 speed transmission right before we left on a 6500 mile trip out west. I like it a lot. Mostly for the altered shift points. But itís not magic. There is still a tendency to drop down to third gear when fourth is perfectly able to pull the hill. Thereís not much alternative on a 6% grade thatís two miles long. Youíre going to be going up in third gear at about 50 mph and 4000rpm. You can do it at 60 if you want but youíll be making a lot of noise at close to 5,000 rpm and generally I donít. In the mountains I prefer to use tow mode and/or not use cruise control. I find that I can use fourth gear effectively by letting the speed drop a little more that CC would and Iím happier. Notwithstanding, Iím very pleased with the tune. Not sure it would be quite so beneficial on a 6 speed model but maybe. So far on my trip Iím only managing about 7 mpg but itís been a LOT of mountains and some impressive headwinds going west through the Dakotas and Montana. Iím keeping careful records and will do all the analysis on the whole trip when we get home.

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