--- In <a href="/group/buickskyhawkownersclub/post?protectID=014075020098221233213097046140166144078150166189251027252142105034177178083061152">buickskyhawkownersclub@y...</a>, locomonza <<a href="/group/buickskyhawkownersclub/post?protectID=091233212180056219138097203245129208071">no_reply@y...</a>> wrote:
> Hi, I have a problem with my holley, Ok the engine is a 350 with a
> holley 1850-3.
> When the car is at idle the fuel ratio gauge shows me that it is Ok
> but when I put the car on heavy load or a cruicing speed like 55 or
> 60 mph it shows me a very lean condition, I think maybe the power
> valve is not the correct for my vaccum, I have 15in at idle in
> and I have a power valve 65, the power valve may open too late???
> could this be the problem???.And this could be the problem of my
> engine running too hot???
> Please if anybody can help me with this one.
> Thank you in advance
As was discussed in another post I've read, divide your vacuum at
idle by 2 that should be the correct power valve for you. In your
case with a vacuum reading of 15 you should be running a 7.5. You
might try reading through the H-body.org files on carburetor setups.
I believe Robert herndon has some very sound recommendations
including jetting and power valve choices. Good luck with your
john b. (in Virginia)
[This is message #356 by user vegadad on Yahoo! Group Buick Skyhawk Owners Club: http://groups.yahoo.com/group/buickskyhawkownersclub