Meep-Meep
дворянин
At this point I would look at dollars to dollars vs your 452's and newly acquired 915's. if you have to put big valves in the 452's then the benefit of the induction hardened seats is gone.
I have no doubt that the 452's can flow big numbers. A 2" hole in a piece of sheet metal will flow big numbers, but I don't think airflow numbers are the whole story. You have to look at wet flow also. I'm no head expert, and I would really like to read what your head guy says about the 452's as he may shed some new light on my thinking - maybe they wet flow better? It's just that every wedge head that was claimed to be superior has the nice short side radius. The 440 Source heads have the short side radius and I'll bet the Edelbrock heads have it too - and they are not designed for emissions. One more thing to consider is the max wedge head with the raised roof and flat floor used tulip intake valves. Perhaps this helped smooth out the flow while going into the cylinder? Olds 455 and FE Ford heads have a flat floor and it's well known that if you want those heads to flow you have to raise the roof. Maybe try tulip intake valves in the 452's? I have a couple of old max wedge valves lying around I could lend for a flow test comparison.
Then there is the question of carb of FI. If you only move air you can get away with murder on the intake port. Just look at my 02 Durango 4.7 vs. the 62 413 long ram set up. Replace the throttle body with a carb on the 4.7 and it probably won't run as well, with some cylinders running lean, etc.... One thing these engines have in common is a very long intake runner, which has been proven to create a big flat torque curve. The longer the intake runner the lower RPM peak torque will occur.
I have stated my thoughts on cam selection here a few times, so maybe look up some older posts.
I would really like to see some detail pics of the rear wheel area on your car. I also have a 66 Belvedere and some day it will get a monster 440 built from spare parts I have lying around the shop. I will need some tire!
I have no doubt that the 452's can flow big numbers. A 2" hole in a piece of sheet metal will flow big numbers, but I don't think airflow numbers are the whole story. You have to look at wet flow also. I'm no head expert, and I would really like to read what your head guy says about the 452's as he may shed some new light on my thinking - maybe they wet flow better? It's just that every wedge head that was claimed to be superior has the nice short side radius. The 440 Source heads have the short side radius and I'll bet the Edelbrock heads have it too - and they are not designed for emissions. One more thing to consider is the max wedge head with the raised roof and flat floor used tulip intake valves. Perhaps this helped smooth out the flow while going into the cylinder? Olds 455 and FE Ford heads have a flat floor and it's well known that if you want those heads to flow you have to raise the roof. Maybe try tulip intake valves in the 452's? I have a couple of old max wedge valves lying around I could lend for a flow test comparison.
Then there is the question of carb of FI. If you only move air you can get away with murder on the intake port. Just look at my 02 Durango 4.7 vs. the 62 413 long ram set up. Replace the throttle body with a carb on the 4.7 and it probably won't run as well, with some cylinders running lean, etc.... One thing these engines have in common is a very long intake runner, which has been proven to create a big flat torque curve. The longer the intake runner the lower RPM peak torque will occur.
I have stated my thoughts on cam selection here a few times, so maybe look up some older posts.
I would really like to see some detail pics of the rear wheel area on your car. I also have a 66 Belvedere and some day it will get a monster 440 built from spare parts I have lying around the shop. I will need some tire!
