Re: strange bronzing/wear patterns on piston

Probably Fred /
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DPC Ryan Wrote:

-------------------------------------------------------

> Ken Roff Wrote:

> --------------------------------------------------

> -----

> > You could be jetted very high and still seize

> > because unchecked timing is what makes the

> > temperature go high.

> > You need to be at the timing shown on graph at

> > your rpm or you will have unsustaining

> > head/combustion temps and boom

> >

> >

> >

> > Do not run your engine even after rebuild

> unless

> > you time it correctly and run a head temp

> gauge.

>

> That is the chart for an HPI ignition, and may

> have absolutely nothing to do with your bike. You

> haven't stated what ignition you have, stock or

> otherwise.

Yes it's a chart for Hpi and it shows what the timing needs to be at 8, 9 10,000 rpm whatever.

If you have static timed/no curve points ignition then you need to be at the lowest you can be and still make power which on a Puch is 14° before top dead center to to run cool at 9000 RPM but anything past that with a high rpm pipe/setup you cannot time low enough in most cases to sustain cool temperatures because you won't make enough power at low rpm to hit that rpm/speed so

that's why Hpi/curve ignition are needed for most performance application with the exception of the mild kit mild rpm set up,

Water or fan cooled engines can help/allow for bit higher timing

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Subject Written By Posted
  strange bronzing/wear patterns on pistonTopic by: viv v viv v 08/25/16 12:17AM
  Re: strange bronzing/wear patterns on pistonRe: Probably Fred Probably Fred 08/25/16 12:24AM
  Re: strange bronzing/wear patterns on pistonRe: viv v viv v 08/25/16 12:34AM
  Re: strange bronzing/wear patterns on pistonRe: Daniel '' Daniel '' 08/25/16 12:40AM
  Re: strange bronzing/wear patterns on pistonRe: viv v viv v 08/25/16 12:47AM
  Re: strange bronzing/wear patterns on pistonRe: Probably Fred Probably Fred 08/25/16 02:57PM
  Re: strange bronzing/wear patterns on pistonRe: Ryan . Ryan . 08/25/16 03:49PM
  Re: strange bronzing/wear patterns on pistonRe: Probably Fred Probably Fred 08/25/16 11:29PM
  Re: strange bronzing/wear patterns on pistonRe: Ryan . Ryan . 08/25/16 03:47PM
  Re: strange bronzing/wear patterns on pistonRe: BryAn eurism BryAn eurism 08/25/16 09:29PM
  Re: strange bronzing/wear patterns on pistonRe: Marc Friedman Marc Friedman 08/25/16 11:30PM
  Re: strange bronzing/wear patterns on pistonRe: Glenn Kuehn Glenn Kuehn 08/26/16 02:43PM
  Re: strange bronzing/wear patterns on pistonRe: Daniel '' Daniel '' 08/27/16 02:33AM
  Re: strange bronzing/wear patterns on pistonRe: Saabsonettguy . Saabsonettguy . 08/26/16 09:36AM
  Re: strange bronzing/wear patterns on pistonRe: Marc Friedman Marc Friedman 08/26/16 10:32AM
  Re: strange bronzing/wear patterns on pistonRe: Probably Fred Probably Fred 08/26/16 10:54AM
  Re: strange bronzing/wear patterns on pistonRe: niklaus _ niklaus _ 08/26/16 03:48PM

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