BSB67
Well-Known Member
I listened to about 5 minutes in the middle of that video. Truly some mis-information in there.
As I suspected, their "chart" is using the 45 year old RPM x cu.in. / 3456 = CFM formula. Then multiply by VE and make your number even smaller. This formula has been proven wrong just about every time it is tested.
If all you want to do is putt around town, use the formula. It will drive real nice once tuned. If you really care about performance, as measured by track et and mph, take your car to the track and try several carbs. If they are tuned right, you'll find a carb lager than recommended in that video will perform the best. Don't take my word for it. If anyone is serious about doing this, let me know. Keystone Raceway and Quaker City Raceway are both local track to me. I'll bring a couple of my dozen or so carbs.
As I suspected, their "chart" is using the 45 year old RPM x cu.in. / 3456 = CFM formula. Then multiply by VE and make your number even smaller. This formula has been proven wrong just about every time it is tested.
If all you want to do is putt around town, use the formula. It will drive real nice once tuned. If you really care about performance, as measured by track et and mph, take your car to the track and try several carbs. If they are tuned right, you'll find a carb lager than recommended in that video will perform the best. Don't take my word for it. If anyone is serious about doing this, let me know. Keystone Raceway and Quaker City Raceway are both local track to me. I'll bring a couple of my dozen or so carbs.