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[Snakebyte]

over a certain percentage of the bore diameter ,it becomes a problem.

too much squish becomes a problem?

[TorqueInc]

Yessir

[Snakebyte]

Are you talking about squish distance or area?

[HD Street Performance]

"My Bad"
A smaller bore would serve the project better as it relates to detonation resistance.

[TorqueInc]

Are you talking about squish distance or area?

Percentage of the bore diameter ...area

[Snakebyte]

Percentage of the bore diameter ...area

Given a sinario like a flat top piston 3.5 bore with 0 degree squish bathtub chamber 67cc. Say you have more than 50% squish area. If too much squish area is bad, how will it effect the engine running?

[HILLSIDECYCLE.COM]

It won't.

[TorqueInc]

Given a sinario like a flat top piston 3.5 bore with 0 degree squish bathtub chamber 67cc. Say you have more than 50% squish area. If too much squish area is bad, how will it effect the engine running?

  Its a little more complicated than that but 50% is about 17% to much

  You will have to forgive Scott.....he just makes things up and it gets worse when there are only re- runs of duck dynasty on the tele

[hrdtail78]

Bad combustion design can lead to poor atomization or flame front travel.   If the design leads to preignition and detonation. Add fuel or remove timing. Anytime either of these or done not for power. It isn't good.  Angle squish is better.   Besides you won't see huge bathtub ledge in big bore engines.  The big valves and shrouding come into play.

[TorqueInc]

 Agreed

  Angled squish works better but only to a point and better on some Harley heads than others.

  On the 99/06 heads there seems to be a limit on valve size as once you cut the angled squish band into the heads you end up losing some of the angle/radius coming out of the top angle of the seat and the flow numbers both go down and the air gets dirty....you can get some of it back by sinking the valve/running a shorter valve and for some reason given all the work that was done the engines just don't seem to make power like they should.

  Some of them,

  I just tore apart and flow tested a set of heads off of a local guys 113" roadking

  Unknown builder,did a very good job as far as the quality of the work done.

It has mildly hand ported HTTC heads with 2" intakes and 1.615" exhaust valves that had what looks like the same angled
squish band that Mackie/axtell does,pistons are Ross customs.

  Heads barely went over 270 cfm on the intake

  Ive seen it ran on a dyno and its well over 125 horse and 122 torque and he rode it everywhere.

  The stock bathtub chamber is just terrible for combustion I believe that Harley has addressed this in the steamer heads but not in the aircooled 14 models....would be nice if they did

 

[prodrag1320]

watch how you respond to his comment scott,he`ll run to the moderators & get you banned 

[TorqueInc]

 Kinda like you two did over at Roadglide ?

  Pretty unreasonable to ask people to back things up with at a minimum a dyno sheet.

  Instead of the same old BS that everyone knows is not true.

[HILLSIDECYCLE.COM]

watch how you respond to his comment scott,he`ll run to the moderators & get you banned 

Kirby, We know all to well about the rude, sarcastic, and demeaning remarks that are constantly spewed in our direction............un-named, on-looking others do as well.
We just let the newbie ramble on, in an attempt to garner work for himself.
Let us all not forget to check out John Walker @ www.maliburacing.com........OUCH X 10!!!
Pretty much sums up a whole lot of things. :2vrolijk_21
Scott

[prodrag1320]

torqueinc. (john walker),I had nothing to do with anything at roadglide forum (I got banned too) but on this forum and the others your on,I think you could make your point with out constently putting down others

[HILLSIDECYCLE.COM]

Nor did I have a single thing to do with that either, contrary to belief, and Kirby is making an extremely valid assessment.