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Re: Cam vs mpg
Quote:
Originally Posted by mattfranklin
Crower used to sell a system in the early '80s with really high static compression ratio pistons and special custom cam with late intake valve closure to manage the peak pressure without knock. I forget what he called it. I think Hot Rod tested it and they would up making 25mpg in a street rod.
It was a neat idea to market it, but he wasn't the first to invent it. Sometimes called the Miller cycle.
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In the 80's this would have been a great thing to have. Most big trucks or cars rarely got above the 17-18 mpg on the highway. Rumors have it that big oil would buy out the inventors of high mileage devices and lock them up in a vault never to be heard of again. I suppose others just didn't live up to their billing.
Regarding cam swap. I agree with above posts. If the truck is getting 18 mpg on the highway I wouldn't tweak one thing. As a poster once said "weld the hood shut and leave it alone." 
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68 GMC 250/3 speed Saginaw p/b p/s
69 Chevy 350/350 currently in pieces still lookin for a cab
06 Trailblazer
I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...
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