Improve gas mileage on a 427 so ?

[olddog]

Patrickt

I get your nostalgia driven desire to do what you did, and that is fine. Different strokes for different folks is part of the fun for me, when I go to the London Ohio Cobra show. There is such a diversity of ideas in the builds. I can imagine how boring it would be, if every car there was identical except for the color of the paint.

However, on the other hand, now I am curious if the original street Cobra with a 428 had vacuum advance. I would guess it did. The 427 race version maybe yes, maybe no. I honestly have no clue.

Personally for a car driven on the street, I feel it should have vacuum advance. Why needlessly burn up a natural resource and pollute the atmosphere for no good reason? Well other than your too lazy to learn how to properly tune the darn thing after putting radical cam in that dropped the manifold vacuum in half. It is a considerable amount of work.

[patrickt]

Originally Posted by olddog

However, on the other hand, now I am curious if the original street Cobra with a 428 had vacuum advance. I would guess it did. The 427 race version maybe yes, maybe no. I honestly have no clue.

Nor do I. My build is closer to the 427 flavor, with a SCAT stroker at 4.125" and a slight bore out. Light Wiseco pistons, light aluminum roller rockers, aluminum flywheel, balancer, SFT cam, it's all designed to rev quickly and easily. At a standstill, I wouldn't say she actually revs when you tap the gas, rather she explodes. Seriously. But, nowadays, I bet I can go an entire summer and only open the secondaries once or twice, maybe not even that.