Evo top end rebuild ?
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From: Sw Florida
Evo top end rebuild ?
I should start by saying my bike ( 87 softail ) was sarting to do some smoking while at idle after a while riding . Did compression test front cylinder120 , rear 125 . Did a leak down test and front cylinder 40 % intake and rear was 20 % exhaust losses . Tore it down to take a look . I could see after head removal the valves were seating horribly . Front cylinder has some white kinda of build up on the side of chamber on head . Pulled pistons and found some markings on skirts and front cylinder piston has a lot of build up ( oil ? )
yanked cam , there was pitting on lobes and pulled lifters , same pitting . So I want to go with andrews ev3 cam , new lifters , manley 10 over pistons ( stock compression 8:5/1). manley valves and spring kit . Heads will be done and a 3 angle valve job with the bottom cut being radiused into cumbustion chamber . Also polishing and porting on the heads . Already have a cran high 4 single fire with coil and adjustable push rods , Vance and hine sbig radius 2 / 1 exhaust . Any thoughts on a different set up or should this be good ?
yanked cam , there was pitting on lobes and pulled lifters , same pitting . So I want to go with andrews ev3 cam , new lifters , manley 10 over pistons ( stock compression 8:5/1). manley valves and spring kit . Heads will be done and a 3 angle valve job with the bottom cut being radiused into cumbustion chamber . Also polishing and porting on the heads . Already have a cran high 4 single fire with coil and adjustable push rods , Vance and hine sbig radius 2 / 1 exhaust . Any thoughts on a different set up or should this be good ?
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The Andrews 3 cam is a good one, as is the 27, and the Wood 6.
The only other thing that I would reccomend would be to surface the heads, -.060", as any/all of those grinds responds VERY well to at least that.
Scott
The only other thing that I would reccomend would be to surface the heads, -.060", as any/all of those grinds responds VERY well to at least that.
Scott
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From: deland,florida
should put you a little over 9.0-1,but you`ll have to cc them to get a real #.
kirby
vee twin racing
kirby
vee twin racing
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Thanx Kirby , found a calculator and without knowing cc's if I want 9.5-1 I would have to go .090 . Seems a lot to me . What do you think .
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From: deland,florida
dont really want to go .090,ide go with new 9.5-1 pistons,cc them now and see how far youd need to go to get 9.5-1
-.060 with a .030 h. gasket might get you in the ball park,78.9cc`s would be 9.5-1
kirby
vee twin racing
-.060 with a .030 h. gasket might get you in the ball park,78.9cc`s would be 9.5-1
kirby
vee twin racing
Last edited by prodrag1320; Oct 14, 2009 at 04:13 PM.
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From: Sw Florida
i really appreciate the feedback . Checked into 9.5's but wiseco doesnt make em . Only 10- 1 . To high without compression releases . I have the old style saterter and heard there are issues with starting .
Last edited by jhnmflr; Oct 14, 2009 at 07:10 PM.