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Old 02-28-2006 | 11:33 AM
  #9  
William Robison
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From: Mary Esther, Florida, FL
Default RE: knocking Saito

ddotson:

Fuel was fresh, tried a friends 20%... awful vibration - knocking sound...
That eleminates the fuel.
Remember "Sportin' Life in Porgy and Bess? "It Aint Necessarily so."

It could well be you made the problem worse by going to the 20% nitro. Depending on the age of your FA-150 you might have one of the "High Compression" versions, they can be really critical on nitro percentage. Try using some fuel with zero nitro, or at most 5% and see what happens.

Also, reset your valve clearance to 0.0015" at most - that helps too. And yes, that is one and one half thousandths inch, not fifteen.

Bill.

>>EDIT to add picture. wr.
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