4 Barrel on a stock slant
I have a header and A Offy intake for my 71 Dart Slant six. Is a small 4 Barrel to much for a stock Slant ?
Kinda like a too-big carb that you have to keep taking fuel out of, to make it run? It don't matter how big a carb you put on it ,you are gonna have to keep taking fuel out and out and out, until it matches the 250cfm or so, that the engine is actually able to inhale. So why not just start with the right sized carb, and enjoy the benefits of a proper match?
It's a 225.
A Stocker,N/A, cannot inhale more than 1/2 it's cid at 1rpm.It cannot be done.No matter how you rate the carbs, at 3800rpm, the stock-engine cannot inhale more than 225/2 x 3800/12x12x12 x 100% VE =247cfm; and at a more typical VE it is going to be less.
You can of course, make any reasonably sized 4bbl pass 247 cfm. And with enough time and patience, you might get the circuits worked out.
But the front half of a 500 will do that. and a teener 2bbl will do that.and I think a SuperSix 2bbl might do that too. And with a whole lot less time and effort put into the tune.
I believe the stock cam is about 236/242/111? ADvertised. and the lift is .395.And a compression ratio around 8/1.
I'd be surprised to see that thing pull 70%VE, in that car, at it's age. So .7 x 247 =173cfm. And that's using the formula inputting max-rpm,instead of where peak torque is. So 173 would be generous. So with that in mind; I guess you
could put a very small 4bbl on it, and run just the primaries.Cuz if you try to run the secondaries,airflo through the front will drop to something like 50%,and the secondary flow will match whatever the front is doing. So now instead of the primaries all by themselves flowing 173cfm;all 4 bbls are flowing a total of 173 cfm. How you will tune the fuel for that I have no idea.Ima thinking.................... EFI.
Like I said before; I got a lot of respect for anybody who takes the time to make this work, with a carb.
But hey, I once put a teener top end onto a 340 short block with nothing more than fenderwell headers and a freeflowing exhaust. I also put the teener cam into it. So essentially it was a big-bore teener.The 65 longroof I put it into,was a blast, pulling hard to 4500(50mph)! And when I opened the hood to proudly show off my 2bbl, the impressed, no longer were. :( Hey snicker all you want, I just blew your doors off fella.You got smoked by a 2bbl! :)
