511 bb chevy fuel requirements

Discussion in 'PSI Superchargers Tech Questions' started by tjb, May 1, 2011.

  1. tjb

    tjb New Member

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    511 bb chevy with bb3 heads 10-1 compression 8-71 20 lbs of boost. I have 7.5 gallons going into the motor. I am familiar with hemi's with 14-71 hh and was putting around 13.7 into motor. Does the 7.5 gallons seem close for this type of motor? Just seems like not much fuel

    Thanks
     
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    tjb, May 1, 2011
  2. Mike Canter

    Mike Canter Top Dragster
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    Is 20 lbs the max or is that at 8000 rpm in high gear. Same for the fuel amount. It is better to specify all at a set reference. So let's assume that you are saying 20 lbs of boost at 8000 rpm. At that the 7.5 gpm will be a little rich but a good safe place to start. I believe you will end up closer to 6.8 gpm as you tune it in. .
     
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    Mike Canter, May 1, 2011
  3. tjb

    tjb New Member

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    Thanks Mike, the 7.5 is figured on paper so its off the 4000 flow at the pump. The boost was figured off what the blower made in the past. I actually figured (on paper) around 7 gpm and thought that was going to be way low! I appreciate your response
     
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    tjb, May 1, 2011

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