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22 mpg w. oversize valves!!

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Old 02-05-2011, 07:02 PM
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22 mpg w. oversize valves!!

A member contacted me. He has a 300, .060 over, over-size valves, p&p head, Comp 252 cam, oem int/exh., 273(?) rears, with OD trans, and he gets 20--22 mpg on the freeway! He said he tach's 2k cruising.

I like that. (Kind of like AB @ 80mph!).
 
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Old 02-06-2011, 11:46 AM
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Thats real good, is that with stock sized tires and everything?
 
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Old 02-06-2011, 12:10 PM
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Aside from the oversize valves, that's similar to my van 300, and I'm getting 16-18 cruising at 70 on the freeway without OD. That 252 grind is great for mid range power and makes a very wide sweet spot for economical cruising.
 
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Old 02-06-2011, 12:48 PM
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Originally Posted by StumpPullerF1 View Post
Thats real good, is that with stock sized tires and everything?
31" tires.
 
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Old 02-06-2011, 03:54 PM
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Weld all thread fittings. You'll be glad you did. It's also a good idea to weld a bead around the end of each pipe, so the hose doesn't slide off.
 
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Old 02-07-2011, 04:37 AM
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Originally Posted by F-250 restorer View Post


Weld all thread fittings. You'll be glad you did. It's also a good idea to weld a bead around the end of each pipe, so the hose doesn't slide off.

Ok, Whats are we looking at here??? did u accidentally post this here instead of your plumbing forum???
 
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Old 02-07-2011, 12:11 PM
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Originally Posted by One79one71 View Post
Ok, Whats are we looking at here??? did u accidentally post this here instead of your plumbing forum???
Sorry guys. The member who is getting 22mpg asked about using a Offenhauser intake, and wanted to know about the heating plate needed for the bottom of them. I posted that so he could see what I made for the plate, to get coolant to the spot.
 
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Old 01-26-2013, 04:42 PM
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Originally Posted by F-250 restorer View Post
Sorry guys. The member who is getting 22mpg asked about using a Offenhauser intake, and wanted to know about the heating plate needed for the bottom of them. I posted that so he could see what I made for the plate, to get coolant to the spot.
Tell him to sign up here! I wanna hear more about his ride. Pictures would be great too.
 
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Old 01-26-2013, 04:53 PM
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Sounds great! Money spent on the head a valves are a good investment even on an otherwise stock engine.
 
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