Small block gas mileage DD magnum/LA ?

AJ/FormS said

I'll be glad to give you my recipe, which speaks for itself. And then you can run it by all of FABO, to get as many opinions as will satisfy you. It's no secret, I have published it here on FABO several times. And you can find a very similar combo in the Hughes Performance archives.
#11---360 Dyno Test (Feb 2000)
It's just too bad they stopped the test at 6000, cuz if you extrapolate the torque line down to 6600 or 6800, and convert what you find to horsepower, it is amazing how high this HE3038 cam (same as what I got, but with OOTB Eddelbrock heads), is willing to rev to.
And check out the torque curve; over 400 ftlbs from ~3800 to ~5700, 400/438=91.5%; simply amazing.


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I like how the engine holds into the HP at the big end. The better the head, the longer it will hold into the HP at the end. I’d like to see a ported version of that. Also with the RPM-AG.

A good street engine should be designed in this fashion. I keep saying it. It’s a tried and true path for decades.

NO matter the engine size, the same basic recipe will hold true. Though a larger engine is better....

Run as much compression as you can.
Port your heads
Use the best intake for the application, step up the exhaust, to breath in and out easy.
(Think on the exhaust!)
Cam for the rpm range and use as much lift as the head will flow. It’ll do really well.

You year a lot about the 3 C’s. Cam, carb, compression.
I added 2 more C’s to it, Converter and cogs!
(Cogs are another name for gears.)