Does anyone have an opinion for this configuration? I have been told twice now that it is tooo much carb for that size of an engine that is probably mostly stock except for the headers. I feel like maybe I just made a somewhat expensive mistake. Let me know what you think. Thanks....Ken
It is a bit too much carb for a mild mannered street ride. Too much cam and too much carb can make a streeter a chore to drive. When you open the throttle plates on a big carb on a small engine you lose all vacuum and thus the ability to draw in a new fuel/air charge resulting in the dreaded "bog" or "stumble". Deep gears help by getting through this area quicker but that's not a cure. An undersized carb runs good--just not fast, but an oversized can be a pain. Here's a formula that gets you close: RPM x 1/2 engine size divided by 1728(to convert cubic inches to cubic feet) is the carb size (in CFM) your engine needs. The one half engine size is due to only half a four cycle engine is in the intake mode while the other half is doing the exhaust bit. Real world hydraulic lifter street engines I usually figure at 5000 rpm so here's your 283 plugged into this formula. 5000 x 141.5 divided by 1728 equals 409 CFM. You can go up to 25% bigger which would be 500 cfm but not much more.
