Quote:
Originally Posted by Derek UK
The richness at about 2.2k showing badly on the AFR graph is mirrored slightly on the torque curve. The needles might like a bit of extra meat there but probably makes the car feel lively too. Good set of curves. Smoothing the bridge would I think reduce the atomisation at lower revs and that isn't good.
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Driving the car it hits all the fuel ratios for me. Idle about 13.2, cruise 14 to 15 and full open throttle 12.5. I was going to experiment with dashpot oil as well, using 80/90 gear oil at the moment.
The idea of the porting post bridge is to make the air flow easier the same as at the front of the carb with stub stack at the entrance. It's opening up the area at the outboard side of the piston. Tapering the lower front and rear edges of the piston is suppose to improve throttle response. There definitely is extra Hp to be had with more carb.