Here's a link to one of the 250's we just built. 2 more are in the works as well as TWO 292's. (I posted this on Inliners, but just in case someone on SB wants to view it.) This one has 'chamber' work, i.e., bigger valves - 1.94 / 1.50, Chevy 307 Flat Top Pistons, the Intake Bosses removed (but not Lump Ported)running an Edelbrock 4 bbl 500 cfm manuel choke on an Offy Intake, Custom Grind Cam and Hedman dual long headers. Hawkins Custom Machine Shop did the work. Enjoy!
If at first you don't succeed . . . er . . . then skydiving may NOT be for you!
**hi i just puled another 250 ci from a 66*well cared for,converted c-10 to a flat bed, was in a wreck,ouch,but sadestthing is i didnt get the 4 on the floor trannie in time for my 66 panel 3 on tree.,stuffs goin to china in a black faster than ya can slurp a ramen noodle,sad an sadder..but**whered i find specs like these that ya use to in ball park,id love to drop one in a car shell i have in my yard,lil 60,s boxy tank.all will work as fitting ect did that homework fun,w/ lil hammer n scredriver like ya said will travel..sweet work and i,m in new mexico any way to fnd where ya are and talk 250,s 1 day??.and aboutthe rough geustimate on theparts cost!!tally up.i have few sweet old 60,s 70,s carbs,n manifolds i made ions ago.i love the 250 the 292 is a gas slug w/ lil more oommppf.have few dorf st 6,s//have ya checked out inlinesixes.com great site for 6 cyl enthusiasts..sweet post thanks.landspook ,frankenstein 66'............
have the fever with no cure eccept to getter done.
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OK Now that this is Built, does anyone KNOW what the 'sweet spot' should be? 2300 rpm's? Basically, I'd like to know what it will run at ALL DAY on the Power Tour and NOT over stress the Engine.
If at first you don't succeed . . . er . . . then skydiving may NOT be for you!
Everyone assumes these engines will only work at lower rpm's but they will easily handle a good deal more than 2300. In fact 3000 is not unreasonable to run all day. If the engine is properly built then there is no worry. There is nothing going on inside it that isn't happening in a V8 that runs up to 3600 all day.
As for a "sweet spot" that is where it feels and sounds good. All engines will vary according to build and application.