Kevin

        You've got some other issue going on there ~ I live @ 5006'FtASL & do
most of my driving @ or above that & Back when my 90Westy had a
H2Oboxer BelowDeck it would do 80MPH when ever I asked it to as long
as the Terrain was RelativelyLevel & the Winds were Light ~ There is a
loss of about 18% in HP @ these Alt's so it does take longer to get to
speed but somewhere @ least in the 70s should be achievable if your Van'
is healthy.

                                                                                        ORR ~ DeanB

On 20 Jan , 2014, at 2:07 PM, KevinPGilleran wrote:

> All,
>
> On my last trip out to the Grand Canyon and then circling clockwise
> around
> to Zion I found that my 1991 westy had problems with what I can only
> imagine
> is the altitude (4970 ft at Kanab Utah). I could barely get the van
> up to 50
> miles per hour the entire time we were at elevation. But once we
> dropped
> back down into California and were back on highway 5 (400 feet or
> so) we
> were back up 70 mph no problem.
>
>
>
> Any ideas of where I should start on this issue would be much
> appreciated.
>
>
>
> Sincerely,
>
>
>
> Kevin P. Gilleran