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I race IMCA southern sportmod. Last race, the motor was nearly shuting off in the middle of the corner, right when I should be getting back on the throttle pretty good. one of my friends noticed the 2 middle pipes were glowing red. the water temp got to 230 or so. I checked the plugs after the race and they loked a good golden-brown color. Am I having a leak somewhere - like intake, header, carb? or is there something going on in the carb to cause it to stumble so bad in the middle of the corner? the float level is also good in the carb. any ideas or suggestions are appreciated.
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most time it is to low of timing or lean. timing to low will burn fuel in header and would make it sluggish.to lean will not have enough of a bang to blow the flame out when fired leaving a flame in the cylinder and will make the header glow. people make the mistake thinking it is rich when it is not. but my money would be on the timing. make sure dis is locked. hope this helpsOriginally posted by regor View Post -
With the spark plugs looking good, I'm thinking there isn't a lean condition from them. I can recheck the timing. What's a good ball park to be in - 32-34?Comment
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thats good for a crate but built engine 36/38 depends on what it is and heads your using.Originally posted by regor View PostComment
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Unfortunately it's not much in the heads. Not a lot of compression. But they have good springs and studs - just not cut down yet. Thanks for the advice. I will be bumping up the timing.Comment
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well it looks like I have something wrong with the distributor. when I checked the timing it was only 24-25 at 1200 rpm, and when I went to 3500 rpm and I tried to set it at 32-36, it would die when I let off the gas. also the dist was welded so its not a spring or weight issue. I put another dist in, and it sets now at 32-36. Im goig to take the componetns off the old dist and see which one was causing the probs.Comment
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