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I have a BBC gen 5. ALL STOCK. Anyone know what kind of rpm I should be getting? Also anyone do a little testing with timing on these motors? Any help would be great. I am running at 4900 rpm and the timing is at 34.
 

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I have a BBC gen 5. ALL STOCK. Anyone know what kind of rpm I should be getting? Also anyone do a little testing with timing on these motors? Any help would be great. I am running at 4900 rpm and the timing is at 34.
Running same timing at 4500 rpm. What carb set up do u have I'm running 2 Holley 650's weiand tunnel ram and berkley bc impeller gps at 78.3 mph. What set up at mph u running at 4900 rpm?
 

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I have a BBC gen 5. ALL STOCK. Anyone know what kind of rpm I should be getting? Also anyone do a little testing with timing on these motors? Any help would be great. I am running at 4900 rpm and the timing is at 34.
Actual HP (estimated) altitude of operation , Impeller cut , pump health as well as an accurate Tach all come into play here , maybe fill in the blanks ? ;) Tom

BTW FWIW if your at sea level with an accurate tach , an A impeller, a good working jet and around 450 HP your numbers are pretty close :)
 
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