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- Jun 13, 2007
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- 3,871
- Location
- south east WA Australia
its probably the HC 3015 grind
some early ones have DHR15 engraved on them
Im running one in my 628 you loose a bit of bottom end compared "08" profile approx 12-15% if you want to keep it need to go to go from 11.8:1 up to about 12.8:1
its a top end revy kind of cam
some early ones have DHR15 engraved on them
Im running one in my 628 you loose a bit of bottom end compared "08" profile approx 12-15% if you want to keep it need to go to go from 11.8:1 up to about 12.8:1
its a top end revy kind of cam
- Joined
- Sep 25, 2013
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- 369
- Location
- canolbarth cymru
Just had a reply from Hotcams and yes it's the 3015, stage 1. I can afford to lose a little bottom end, in road racing once you've launched off the line we tend to keep the rev needle pointing straight up!
Would the cam work in the 644cc? The 628cc would be a bit more revvy with the shorter stroke? (sorry, thinking out loud!)
What piston are you using to raise the compression? Off the shelf or highly modded by you!
Many thanks
Would the cam work in the 644cc? The 628cc would be a bit more revvy with the shorter stroke? (sorry, thinking out loud!)
What piston are you using to raise the compression? Off the shelf or highly modded by you!
Many thanks
- Joined
- Jun 13, 2007
- Messages
- 3,871
- Location
- south east WA Australia
Gday Canolman
go for a 13:1 644 dude!
im just using a prox "650" piston (elko copy) normally the CR with the 80mm stroke would be 11.8:1 like stock but my block and head have been machined both by me and other POs the CR is about 12.6 :1
becasue of that teh cam chain was too short so i had to move the cam up 1mm then had to grind clearance out of the rocker arms for the cam lobes, spanner made a special cam chain tensioner for his bike, FD racing uses 2 adjustable tensioners one at the front and one at the back (no headgasket)
look up the specs on a wossner 8583 just need to pop it in a lathe and take some meat out of it to get what you want.
go for a 13:1 644 dude!
im just using a prox "650" piston (elko copy) normally the CR with the 80mm stroke would be 11.8:1 like stock but my block and head have been machined both by me and other POs the CR is about 12.6 :1
becasue of that teh cam chain was too short so i had to move the cam up 1mm then had to grind clearance out of the rocker arms for the cam lobes, spanner made a special cam chain tensioner for his bike, FD racing uses 2 adjustable tensioners one at the front and one at the back (no headgasket)
look up the specs on a wossner 8583 just need to pop it in a lathe and take some meat out of it to get what you want.
- Joined
- Jun 13, 2007
- Messages
- 3,871
- Location
- south east WA Australia
Ive decided its expensive
probably won't be doing anything till end june
if i could just get some 5" round bar 2618 alloy for a good price ......
probably won't be doing anything till end june
if i could just get some 5" round bar 2618 alloy for a good price ......
- Joined
- Jun 13, 2007
- Messages
- 3,871
- Location
- south east WA Australia
It will probably work Paolo
I used a thin cut off grinding disc
I used a thin cut off grinding disc
- Joined
- Jul 14, 2016
- Messages
- 596
- Location
- Australia, Beechworth, Vic.
Has anyone had any experience in regrinding a bike cam?
I wonder how much height would need to be reduced to increase the duration to a worthy amount but still have the valve clearance to suit an avail shim?
570 cam.
Silly thinking?
I wonder how much height would need to be reduced to increase the duration to a worthy amount but still have the valve clearance to suit an avail shim?
570 cam.
Silly thinking?
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