:blackeye:
I did... and I went to the Wallace Calculators site, an online computer dedicated to mathematically predicting e.t.'s and speeds from weight/horsepower figures.
I don't know how accurate this program is, but experience with it has proven it to be SOMEWHAT accurate. I would be the last person to say it's anything approaching "dead-on." Too many variables to take into consideration.
But, for example, and just for grins, lets look at the results for Mark's engine, a pretty maxed-out combination, currently running very well, I think:
He's looking for an 11.3, having just run an 11.43, at (I THINK) 2300 pounds.
Wallace says that (11.3) will take 315 horsepower, at 2300 pounds.
At that same weight, a 10.90 would take 351 horsepower, or approximately 1.5 hp per cubic inch.
Call me a doomsayer, but Mark's car is VERY LIGHT for an A body (at 2300 pounds, I believe) and 1.5 horsepower per cubic inch is asking a LOT from a slant six cylinder head normally aspirated, regardless of how much work has been done on it.
I don't know if your plans include the Dart body you're currently running, and whether you have plans to adapt some form of 4-valve head to a slant 6 block, but without an EXTREMELY light chassis AND a 4-valve head, I don't see this happening (a 10-second NA Slant 6) in MY lifetime (which won't be very much longer, in any case...)
With the small bore/long stroke configuration that is part and parcel of the /6 design, and the limitations that come with it relative to valve size, the breathing that would be required to make 1.5 hp per cubic inch just doesn't seem to be there.
Bore and stroke it to 280 cubic inches, and all you've done is make an already poor-breathing engine, worse.
I don't think this 10-second car is gonna happen, normally-aspirated.
Just my 2-cents.
Now, tell me what's wrong with my argument...:blackeye:
