Misc: Everything Else H.T. Coils

[vibrac]

Bill there must be loads of cams for a single to fit your dizzy all the old BSA C11 and C15 jobs for a start

 

[Bill Thomas]

Yes, But I don't get out much, There is not much where I live and I might miss Netley Marsh auto jumble this year, My local bloke stocks the Single type caps, So I will pick up a few of those and another twin lead coil for stock !. Once again, If I can run a wasted spark, Why bother ?. Cheers Bill.

 

[Bill Cannon]

Thanks Bill, I just can't work out where the wasted spark will happen on a Vin', But worth a try. Cheers Bill.

Bill, the wasted spark in a cylinder will occur when the other cylinder is firing, so + or - 50 degrees on the wrong stroke. Hope that makes sense.

 

[Bill Thomas]

Thanks Bill, You and Len have proved it works on a Twin, But without setting it up on a Comet engine, I am not sure how it would work using a Twin Dist' Cam on a single, It must be different, Depending which lobe I set it on ?, I wish I was Clever !, I should have gone to School !.
Sorry for giving you this problem. Cheers Bill.

 

[Bill Cannon]

It would still be the same principle, your wasted spark would either be + or - 50 degrees on the wrong stroke depending which cam you time it on, which will not cause any problems.

 

[Oldhaven]

If you check page 151 ( in my edition) of Know thy Beast, it describes how to set up a Comet with a D twin distributor. It requires a single cylinder cam profile change, no rotor and a plain cap. I think this is what you were asking?

 

[Robert Watson]

There are many Vins running HD sparks which fire twin sparks. Absolutely never have had any issue with that.....

 

[Bill Thomas]

It would still be the same principle, your wasted spark would either be + or - 50 degrees on the wrong stroke depending which cam you time it on, which will not cause any problems.

Many thanks Bill, You are a top Man.
Hello Ron, The thing is I have a few twin cam type, And was wanting to use them, If it was poss', On Brother Ron's and also my next build 560.
Cheers Bill.

 

[vibrac]

I have read somewhere that an idle spark does cause some loss of performance..... Oh to have a memory

 

[Bill Thomas]

Not sure about the Comets, But my Special could do with a few less BHP, It's not good for my Licence !.
Don't know if it's the big Carb's or the gearing, It's always 5 to 10 mph faster than I think, The gearing is 22 gearbox sprocket and 48 rear, I thought that would be back to standard ish, But it might be higher ?.
I use the same speedo " Bicycle Type" head on all the bikes, So it's not that.
It's making a funny engine noise, But just wants to Fly.
Lovely to ride with Brakes again !, And not worry too much about potholes, It's so different.
Cheers Bill.