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Valve Timing GS1150

  • Thread starter Thread starter Flo
  • Start date Start date
Hi,

After reading Greg Cope's recomendations on APE's website and looking through the Megacycle Cam catalog, the Suzuki Manual I did this:

IO 9 BTDC
IC 48 ABDC
dur@1mm 237 (measured by me)
LCI 109,5

EO 44 BBDC
EC 5 ATDC
DUR@1mm 229 (measured by me)
LCE 109

stock GS1150 cams, all cam events at 1mm lift.

GS 1150 bored to 1327, larger intake (28.5) and exhaust (23 I think, cannot remember right now out of head) valves. 4-1 with open muffler, will get 36mm flatslides.

Any comments? Except going for a larger cam (maybe next season)

Regards
Flo

Is it standard to peg the cam events at 1mm lift?
 
Is it standard to peg the cam events at 1mm lift?

Pretty much across the board in bike motors, yes. Car standard seems to be .050in.
the Jap factories seem to use 1mm as a standard, most of us use .040in which is pretty much the same thing - and most I'd imagine use inch dial gauges.....Doesn't really matter which you use so long as it's repeatable and measured at a point past the silencing ramps at beginning and end of the cam lobe.
 
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I have been dealing with cam manufacturers & building race engines for 35 years & have always used .050 myself. I grew up in a race shop & that was what my Dad always used. Ray.
 
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