Dyno testing a stock(?) 1972 440
This is really interesting stuff.
A question I have is about the increase you picked up from the carb. I'm assuming it had a TQ on it which are supposed to be close to 800cfm. If the TQ was running properly than the HP figures shouldn't be that much different.
Or am I missing something.
Your missing something.........post #13........where we say we're using a 600 cfm Carter. The manifold, used through '72, has a 4150 carb bolt pattern on it.
We are still getting a vacuum signal in the intake of 1.5"-2" in the upper RPMs. The engine is telling us the 750 is too small even with the stock manifold. We've decided to not go with a bigger carb until we change the manifold.
Let's do that, let's go with the Mopar Performance M1 single plane.
Now don't fuss with me folks, its my game and we're not using a dual plane this time even if you want me to.
RPM..............TQ...............HP
2500............416..............198
2600............409..............202
2700............405..............208
2800............404..............215
2900............404..............223
3000............415..............237
3100............421..............248
3200............422..............257
3300............422..............265
3400............420..............272
3500............418..............279
3600............414..............284
3700............408..............287
3800............407..............294
3900............399..............296
4000............395..............301
4100............391..............305
4200............387..............309
4300............381..............312
4400............371..............311
4500............363..............311
4600............348..............305
4700............335..............300
4800............322..............294
4900............311..............290
5000............298..............283
5100............280..............272
5200............263..............263
At least we broke the 300 HP barrier. Now we toss in the 509 cam and shoot for 350 HP with less than 8:1 compression. We know we'll lose some bottom end torque, but can we gain enough everywhere else to make it worth it?
