87 toy vacuum advance
#1
87 toy vacuum advance
If I set the timing on my 87 22r at 12 degrees with the vacuum hoses attached,and rev the motor to 3000 rpm,should the timing move up or pull down to 0 degrees? I'm trying to figure out why I lose power from around 3000 rpm and up,thanks
#2
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the timing should advance under high-vacuum/part-throttle conditions and retard under full throttle conditions up to the point where the total advance of the centrifual advance mechanism has been reached.
It should not ever go to 0 degrees... it should not drop below the initial advance setting.... unless you have knock sensing involved and then the knock sensor could cause the timing to drop below initial advance.
It should not ever go to 0 degrees... it should not drop below the initial advance setting.... unless you have knock sensing involved and then the knock sensor could cause the timing to drop below initial advance.
Last edited by abecedarian; 07-11-2008 at 01:24 PM.
#3
the timing should advance under high-vacuum/part-throttle conditions and retard under full throttle conditions up to the point where the total advance of the centrifual advance mechanism has been reached.
It should not ever go to 0 degrees... it should not drop below the initial advance setting.... unless you have knock sensing involved and then the knock sensor could cause the timing to drop below initial advance.
It should not ever go to 0 degrees... it should not drop below the initial advance setting.... unless you have knock sensing involved and then the knock sensor could cause the timing to drop below initial advance.
#4
it was the port on the carb causing the problem,I put a vacuum guage on it and it was screwed up,I changed to another port that advanced the timing with the rpm's as it should and the truck scats now
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