lol true but its gotten way off topic. sombody just tell me what carb would be good for a stock 302, no matter what the brand include cfm too. keep it simple pleez lol
Yeah it did get off track but good discussions. I thought you had your answer early on but...... a few ( heck maybe just me ) recommended an Edelbrock 600 others the Holley 600. For a street car I don't think you can go wrong with either and they are both pretty much drop and go. Ford used the Holley 600 VS carb (4180 model I believe) on factory cars so it's pretty bullet proof. One word of caution if you are running an electric fuel pump. The Edelbrocks don't seem to like over 5 PSI of fuel pressure so be sure you have a gauge and you may need to drop the pressure. Holleys run fine with the 7 PSI you get from most carb electric pumps. If you don't have a problem with rebuilding a carb I still have the factory 600 off my 83 Mustang. Complete with idle kicker for the AC
Pete, What you're saying would be true if it was an out-of-balance situation but in the engines the external weight is just balancing the existing internal out of balance. It is positioned to limit the harmonic imbalance that would occur if the weight was internal. There are enough harmonic problems in a V8 without creating more potential. In all honesty there is a money issue involved as well. Making a perfectly balanced crank - without external balance weights is possible but with the size of the engine it would be considerably nore expensive than it is to externally balance the engine. It still poses little limitation on the maximum rpm that the engine can turn - as long as the assembly is actually well balanced. BTW, it is actually inch grams - not ounces. It is just more common to call it ounces. (a gram is considerably less than an ounce)
As far as the carb size for a 302, for pure street use a Holley 570 cfm Street Avenger would be ideal.
That's a good carb. Not too big good throttle response. For a stock motor that will only be street driven I'd only go 600cfm max. An edelbrock 500 cfm 4bbl would provide great throttle response and fuel mileage with only a loss of max HP at the high end. If you wanted to bother tuning/installing it the Rochester spread bore from an early 305ci Chevy(or 307 Olds) would be a great carb(don't know CFM). extremely small primaries for the response and big secondaries for the high end.
If you do this, do it after you buy a new carb. Old Holleys frequently are a pain even after an experienced carb guy goes thru em. Buy a new (or a new looking used Holley, these are a better bang for the buck) and then try your hand at rebuilding a cheap carb. This way, you won't be on foot if things go wrong with the rebuild. All the carbs I've bought over the last ten years were newish looking Holleys someone gave up on, all were bought for $100-150.
a buddy of mime in town is willing to sell me his 600 edelbrock. hows the milage on a 600 vs the 500.
There are too many variables to really say what the difference in mileage would be, if there even was one. In theory, the smaller carb would be better at idle and part throttle, as well as better initial response and mileage. But, I'm sure the 600 edelbrock is by far more common on a 302. I usually put a 600 on mild rebuilds and I am very happy with the results. I currently have a edelbrock 750cfm sitting on my 302, and the idle and response aren't too bad but, It is too much carb even with the work/parts I have in the engine. If you got a good deal on a decent 600, get it, you'll like it.
