Pauly Posted 11August, 2014 Report Share Posted 11August, 2014 Caption this image. Link to comment Share on other sites More sharing options...
KBGr4 Posted 11August, 2014 Report Share Posted 11August, 2014 Suspect it did some damage like "The Hammer of Thor" Link to comment Share on other sites More sharing options...
cyberpunky Posted 11August, 2014 Report Share Posted 11August, 2014 *found that missing bolt* Link to comment Share on other sites More sharing options...
Dreamr Posted 11August, 2014 Report Share Posted 11August, 2014 "Specially marked piston for sale" ......... increase your horsepower the easy way......Enquire within..... Link to comment Share on other sites More sharing options...
tazzieman Posted 11August, 2014 Report Share Posted 11August, 2014 "Your engine is screwed" Well , sort of. Link to comment Share on other sites More sharing options...
Harvs11 Posted 11August, 2014 Report Share Posted 11August, 2014 That'll buff out. Link to comment Share on other sites More sharing options...
Peter M Posted 11August, 2014 Report Share Posted 11August, 2014 Pauly,Have you got a matching photo of the head? Link to comment Share on other sites More sharing options...
tazzieman Posted 11August, 2014 Report Share Posted 11August, 2014 "Balanced & screwprinted" Link to comment Share on other sites More sharing options...
Caledonian Posted 11August, 2014 Report Share Posted 11August, 2014 Piss'd n Broke. Link to comment Share on other sites More sharing options...
Uncle Posted 11August, 2014 Report Share Posted 11August, 2014 Bolt on horsepower. Link to comment Share on other sites More sharing options...
Pauly Posted 11August, 2014 Author Report Share Posted 11August, 2014 Some good captions here lmao!! Pauly, Have you got a matching photo of the head? I dont. But would be interesting to see! Link to comment Share on other sites More sharing options...
Coastr Posted 11August, 2014 Report Share Posted 11August, 2014 Bolt on upgrade Link to comment Share on other sites More sharing options...
tazzieman Posted 11August, 2014 Report Share Posted 11August, 2014 Twice as stupid as we first thought , and instantly doubled the HP Uncle Link to comment Share on other sites More sharing options...
Corki944 Posted 11August, 2014 Report Share Posted 11August, 2014 "Screwed over......twice" OUCH..... Link to comment Share on other sites More sharing options...
Pauly Posted 11August, 2014 Author Report Share Posted 11August, 2014 Twice as stupid as we first thought , and instantly doubled the HP Uncle Oh there's the other bolt Link to comment Share on other sites More sharing options...
Flatout Posted 11August, 2014 Report Share Posted 11August, 2014 "Too tight to buy loctite?" Link to comment Share on other sites More sharing options...
Uncle Posted 11August, 2014 Report Share Posted 11August, 2014 2 bolt mains. Link to comment Share on other sites More sharing options...
Dreamr Posted 12August, 2014 Report Share Posted 12August, 2014 Well, this has certainly been a "thread starter"....... Link to comment Share on other sites More sharing options...
Pauly Posted 12August, 2014 Author Report Share Posted 12August, 2014 at least he now has 2 half moulding casts of the bolt he needs to replace. Link to comment Share on other sites More sharing options...
tazzieman Posted 12August, 2014 Report Share Posted 12August, 2014 For bonus points , what's the thread pitch? Link to comment Share on other sites More sharing options...
Uncle Posted 12August, 2014 Report Share Posted 12August, 2014 "What size pistons do you need" "M6" Link to comment Share on other sites More sharing options...
Uncle Posted 12August, 2014 Report Share Posted 12August, 2014 For bonus points , what's the thread pitch? 1.25 Link to comment Share on other sites More sharing options...
tazzieman Posted 12August, 2014 Report Share Posted 12August, 2014 Well , that's assuming it's metric i.e. The relationship between the height H and the pitch P is described by the following equation: or In an external (male) thread (e.g., on a bolt), the major diameter Dmaj and the minor diameter Dmin define maximum dimensions of the thread. This means that the external thread must end flat at Dmaj, but can be rounded out below the minor diameter Dmin. Conversely, in an internal (female) thread (e.g., in a nut), the major and minor diameters are minimum dimensions, therefore the thread profile must end flat at Dmin but may be rounded out beyond Dmaj. The minor diameter Dmin and effective pitch diameter Dp are derived from the major diameter and pitch as ....and not the old Landy favourite , the Whitworth The form of a Whitworth thread is based on a fundamental triangle with an angle of 55° at each peak and valley. The sides are at a flank angle of Θ = 27.5° to the perpendicular to the axis. Thus, if the thread pitch is p, the height of the fundamental triangle is H = p/2 tan Θ = 0.96049106 p. However, the top and bottom 1⁄6 of each of these triangles is cut off, so the actual depth of thread (the difference between major and minor diameters) is 2⁄3 of that value, or h = p/3 tan Θ = 0.64032738 p. The peaks are further reduced by rounding them with a 2x(90°-Θ) = 180°−55° = 125° circular arc. This arc has a height of e = H sin Θ/12 = 0.073917569 p (leaving a straight flank depth of h−2e = 0.49249224 p) and a radius of r = e/(1−sin Θ) = 0.13732908 p. Link to comment Share on other sites More sharing options...
Pauly Posted 12August, 2014 Author Report Share Posted 12August, 2014 1.25 I was about to say the same thing, it looks like a 1.25mm pitch. Link to comment Share on other sites More sharing options...
tazzieman Posted 12August, 2014 Report Share Posted 12August, 2014 Nah , Whitworth! What block? Link to comment Share on other sites More sharing options...
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