Figured Id start a new thread for this since other one is about side cover gasket.
Just wanted to get some input on an open motor build I will be doing this winter. So far I want to keep it s/a on the outside. BUT have not decided on carb yet. You see alot of rules motors on here but not much in the way of open. Im sure there are several reasons for that and I wont dive into why. So why not all of us chime in on this one to maybe help someone out in the future on new Bobs.
This is strictly for a super small track (dirt) and am currently not seeing over 7000rpms. Like to see built on race gas first. Then may go to alky.
Anyways heres what Im thinking so far:
Mike Clements Big Bore 2.815" w/ 3.303" billet h beam rod
Max stroke crank to give .010" in hole (with 3.303" rod)
Honda or Wiseco flat top piston (Which one?) Want it in the hole .010" and Honda will do that
14 cc head - possibly shaved .030" and maybe smoothed and worked a bit (gasket size depends)
Dover carb - s/a
Arc 930 ceramic coated pipe
Champion shaft mount rockers 1:1 ratio
Cam - Nr between 274-0207 or 280-0611 or 285-02 (Cant decide...have BP2 2 now with 1.3 ratio)
Billet side cover w/ cometic gasket
Head stud kit
Side cover stud kit
Enlarge oil galley
Springs - 26lbs or TBD depending on cam
Billet locks and retainers
SS valves
Arc adjustable flywheel
Portable starter to start
Am I on the right page for a good open build? Just for fun as of now but was wondering if I ever do run at a sanctioned event if this would be competitive on alky. Want to keep it on race fuel now for various stupid reasons.
Im basically going with a little more than what I got now but with added reliability with studs and sidecover and all. I know your not going to get reliability like a Volvo or something in one of these but you know what I mean.
Fire away.
Just wanted to get some input on an open motor build I will be doing this winter. So far I want to keep it s/a on the outside. BUT have not decided on carb yet. You see alot of rules motors on here but not much in the way of open. Im sure there are several reasons for that and I wont dive into why. So why not all of us chime in on this one to maybe help someone out in the future on new Bobs.
This is strictly for a super small track (dirt) and am currently not seeing over 7000rpms. Like to see built on race gas first. Then may go to alky.
Anyways heres what Im thinking so far:
Mike Clements Big Bore 2.815" w/ 3.303" billet h beam rod
Max stroke crank to give .010" in hole (with 3.303" rod)
Honda or Wiseco flat top piston (Which one?) Want it in the hole .010" and Honda will do that
14 cc head - possibly shaved .030" and maybe smoothed and worked a bit (gasket size depends)
Dover carb - s/a
Arc 930 ceramic coated pipe
Champion shaft mount rockers 1:1 ratio
Cam - Nr between 274-0207 or 280-0611 or 285-02 (Cant decide...have BP2 2 now with 1.3 ratio)
Billet side cover w/ cometic gasket
Head stud kit
Side cover stud kit
Enlarge oil galley
Springs - 26lbs or TBD depending on cam
Billet locks and retainers
SS valves
Arc adjustable flywheel
Portable starter to start
Am I on the right page for a good open build? Just for fun as of now but was wondering if I ever do run at a sanctioned event if this would be competitive on alky. Want to keep it on race fuel now for various stupid reasons.
Im basically going with a little more than what I got now but with added reliability with studs and sidecover and all. I know your not going to get reliability like a Volvo or something in one of these but you know what I mean.
Fire away.