One For The Money, Two For The Show

[Graham Smith]

Another good series of articles.

Sorry, if you're not a VOC Member, you won't get access to these:

One For The Money, Two For The Show: Pt I
One For The Money, Two For The Show: Pt II
One For The Money, Two For The Show: Pt III
One For The Money, Two For The Show: Pt IV
One For The Money, Two For The Show: Pt V
One For The Money, Two For The Show: Pt VI

 

[Bill Thomas]

That's a long read Graham !, Only got to part 3, But interesting, At the time they were in MPH, I didn't have time Plus the small print, But better now on Computer, Thanks Bill.

 

[bmetcalf]

Do I remember correctly that the bike got stolen?

 

[Ian Savage]

Do I remember correctly that the bike got stolen?

No. It was destroyed in the UK National Motocycle museum fire, about 15 years ago and never rebuilt.

 

[Bill Thomas]

Damn, I could have been building a 750cc,
Although I thought I had read any stroke over 102 ish, Ment that the piston speed would be too high ?,
At about 6000 rev's ?.

 

[Monkeypants]

Piston speed at 115 mm stroke would be a concern for sure, but only if higher revs were planned.
With the Mk1 cams there would be no point in revving past 5500, so maybe it all adds up.
That project sure took over his life! It sounds like Derek Chinn donated a lot of time and energy to it as well.

I wonder who Mr. E is and if he is still operating?

Glen

 

[Bill Thomas]

I haven't Used Mk1 cams since 1970 !, They were in my outfit in 1967 and completely wore away !,
I kept putting bigger and bigger main jets in the carb's, To make it go faster,
Then found when adjusting the tappets, the valves were not opening !.

 

[Monkeypants]

I have Mk1 s with small carbs and 8 to one on the bike I ride most. Somehow it goes a bit better than the ported high compression Rapide with the big carbs, even for top speed.

But these Mk1s do open the valves!

Derek Chinn had lots of experience and knowledge with a big capacity supercharged engine, so maybe MK1s work best with that setup?

Glen

 

[Bill Thomas]

I have never had the time or money to do back to back tests,
And found Mk2 s have worked well for me, And also are fine for the road.
So for once, I have done what the factory said for there racing.

 

[TouringGodet]

I heard that Brian Chapman gave Max Lambky cam grind specs for supercharged motors, so I assume it was a custom grind different than any of the factory grinds.