Re: pumping up a 766?

Posted by chadd on March 20, 2007 at 11:36:49 from (155.92.30.94):

In Reply to: Re: pumping up a 766? posted by John Schneider on March 20, 2007 at 10:00:33:

I looked up part numbers, and it appears that the 966 and 766 use about 95% of the same rear ends. So theoretically you could crank it up to about 110 safely. Any more than that and you should consider getting a 1066. The 1066 had several changes to the rear end to handle the added power. To have it done, I would consult a local mechanic who others have used or a dealer you have a good relationship with who knows the inside of that injection pump very well. If you adjust the fuel screw to far, you could end up getting way too much fuel and then really break things. There are over 170 parts inside of the pump, and I don't want to give you the wrong one. Also, if you ever take it in to a dealer for service be SURE you tell them it is cranked up and not to dare touch it! Our dealer had to replace the idle adjustment screw on the back of the pump and they called us afterward to tell us that someone tampered with the governor and set it back to stock!!! Then they wanted to charge us to turn it back up!!! That 966 hasn't run right since, and the powerband sure shifted from 110 to 95 hp.

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