And now for the monkey wrench......... What type of carb would I choose on this combo and why?
A 360 with nice fat torquey 223* street cam/balanced compression, a stick, 2.76s and overdrive.
So the first question is why the 2.76s. Answer ;cuz the 3.09 pulls them off the line real good. The starter is the same as a 2.66 x 3.23
Why the overdrive? Well cuz I can tune that 223 to make very high 20's mpg, at 65=1740rpm.
Yeah but won't the engine lay down in second gear? No, because it makes a peak of 440 ftlbs, and my car is only 3467 me in it; so wake up, I'm coming thru.
So what's the problem,put a 750DP on it and lay some rubber. Answer,Ok that works dandy on Saturday night, but what about the rest of the week?
The rest of the time is spent in second gear mostly, averaging 30 odd mph. This makes about 1965rpm. At this rpm the VP will be very high, meaning the engine is very willing to blast off.Same happens at the cruise rpm of 1740; lots of VP. This means that your 750DP is a very big 2bbl, just itching to go. The smallest throttle opening increases cause the car to surge ahead. This is very annoying while cruising, as you are constantly sawing on the gas pedal to find a particular mph.
So what's the solution? You guessed it a smaller throttle opening. But, wait that means like a 500, before the sawing stops.And really the engine wants a minimum of 650.
And that leads to the obvious answer; a spreadbore.
But wait, who runs a 2.76, lol? Answer; the factory.
But wait what happens with 3.23s? well that is a 17% in rpms so now the second gear Rs are 2300.....So the VP has dropped a bit, but the ftlbs are increasing, so sameold/sameold.
What about a smaller cam? Smaller than 223, are you kidding; why? The 223 makes mega torque in a 360 and gets great fuel mileage, and if you spring it just a bit heavy it'll rev to 7000 and with nice heads will make more horsepower than most chassis can handle.So no, smaller than 223 is .......insert your own adjective here.
What about bigger. Bigger is ok cuz the VP will drop, and so the jumpiness goes away. Plus she won't like 2.76s anymore. In fact with iron heads you'll end up with 3.91s before too much time goes by. So now you're in a whole new world; bolt on that 750 and go.
But a 223* cam is a sorta special place.And she likes a spreadbore especially with hiway gears.
I suspect if you extrapolate this to a stroker, which makes ultra-mega torque, this could become a serious issue.Remember, all examples are with a clutched car.
