I may regret asking this here, but I'm going to do it any way.
In my 68 Cougar I have a 289. When I was going to school at BSU for the auto tech program, I decided that this was going to be my 'project car for school'.
So, did the brakes, rebuilt the trans, and built the motor. It's a .030 over 289 with .010 over and under on the rods and mains. I installed the RPM performer cam, .496/.520 lift, 238-248 duration. I learned a lot about push rod length, parts pushers, machine shop folks, and the usual birthing pains of the first performance motor build.
I also used the new Edelbrock dual quad set up. Two ea. 500 cfm carbs with a progressive linkage. I had the linkage set up as non progressive, I didn't like it.
So, here's my question: Even though it "looks like" 1000 cfm, do you think there is a gain in perfomance to be had by switching to a pair of 650's? The set up only runs primarily on the rear carb.
My understanding is that under WOT, the car may only draw 750 cfm between the two carbs.
A single 500 cfm is too small for my 289, and it runs primarily on exactly that.
If I went to the 650's, I Think it would be better streetability, until I stick my foot in it, and then it would be ludicrous speed out of that poor 289......
What do you think, and why?
In my 68 Cougar I have a 289. When I was going to school at BSU for the auto tech program, I decided that this was going to be my 'project car for school'.
So, did the brakes, rebuilt the trans, and built the motor. It's a .030 over 289 with .010 over and under on the rods and mains. I installed the RPM performer cam, .496/.520 lift, 238-248 duration. I learned a lot about push rod length, parts pushers, machine shop folks, and the usual birthing pains of the first performance motor build.
I also used the new Edelbrock dual quad set up. Two ea. 500 cfm carbs with a progressive linkage. I had the linkage set up as non progressive, I didn't like it.
So, here's my question: Even though it "looks like" 1000 cfm, do you think there is a gain in perfomance to be had by switching to a pair of 650's? The set up only runs primarily on the rear carb.
My understanding is that under WOT, the car may only draw 750 cfm between the two carbs.
A single 500 cfm is too small for my 289, and it runs primarily on exactly that.
If I went to the 650's, I Think it would be better streetability, until I stick my foot in it, and then it would be ludicrous speed out of that poor 289......
What do you think, and why?