Points Timing

[philz]

I am getting conflicting info for standard Li150 points. I am advised 21-19-17 degrees. Any advice welcomed. Thanks.

[jason frost]

17deg

[Yanker]

19deg (23 officially)

[bristolmod]

19deg (23 officially)

+1 wot the geezer said

[philz]

See what I mean! 17deg 19deg what would be the difference?

[drunkmunkey6969]

See what I mean! 17deg 19deg what would be the difference?

2 degrees

[gerryjunior]

i have my series 2 running on points, its a bog standard 150 ,i have it timed to 19 and it hasn't missed a beat in 3 years..but im no expert.

[Chris in Margate]

Time it at 19 BTDC and only ever use the very best petrol you can buy.

[Muppet]

what is hapenin wen y retard it and why? yep it fires later but what hapens

[bristolmod]

the "burn" is not instantaneous- it tales time to completely combust. By timing "early" at say 19 BTDC, it allows the piston to travel to the very top of its stroke before all the mixture has burnt and produced the max amount of power. If its timed too "early", at say 21 BTDC, the piston on its upwrads stroke is fighting against the "explosion" which means lost power and more heat. If its too late, then the piston is already on its way down, which again means less power, but also it runs slightly cooler.

Its a balance really.

Back in the day, the fuel was "better" than the crap about today, which meant that timing was "better " at 21 BTDC.

Chris