Guest BamaDave Posted August 24, 2012 Share Posted August 24, 2012 Can someone please link me to a thread that contains information associated with build short block where they’ve substituted the stock rod length of 142mm center to center to a longer 146mm? I’m very interested in this design and I haven’t located many details. Thanks, David Quote Link to comment Share on other sites More sharing options...
Guest BamaDave Posted August 29, 2012 Share Posted August 29, 2012 Wow, 46 views and no response, bummer. It's my understanding that this type configuration is use more frequent in the UK, perhaps not. Thanks anyway. BD Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 30, 2012 Share Posted August 30, 2012 Not many of us fork out the ludicrous amount of cash needed for a stroker kit I don't know of anyone currently running a stroker, and only about 2 or 3 in the last ten years, so it's certainly not that frequent a use in the UK! You could post me a stroker kit to look at if you want Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 30, 2012 Share Posted August 30, 2012 Are you talking about de-stroking to run higher RPM, or running a smaller compression height? Quote Link to comment Share on other sites More sharing options...
Guest BamaDave Posted August 30, 2012 Share Posted August 30, 2012 Actually the cost is much lower than a stroker kit. From what I understand you only use the stroker piston and extended length rods and retain your factory crankshaft. I don’t know that much other than it reduces the overall arc of the internal rotating assemble which cuts down on bearing pressure and allows for the ability to run at a higher RPM at a slight reduction of torque. This is a new concept to me I was hoping one of you guys was more familiar with this set up that could provide a more detailed explanation. Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 30, 2012 Share Posted August 30, 2012 I can understand how it works. The reduction in the ratio of the rod length to the crank throw will reduce the piston accelerations slightly, and the (presumably lighter beause of its smaller compression height) piston will also help reduce the inertia forces. In theory you could up the RPM and still stay within the existing cranktrain design limits. You would have to know the mass of the stroker piston and longer rod to work out how much higher you could go, and then there's still the valvetrain to consider. I just went to look at my spreadsheet and I thought the stock rod length was 139mm? Do I have that wrong? Quote Link to comment Share on other sites More sharing options...
Nic Posted August 30, 2012 Share Posted August 30, 2012 I just went to look at my spreadsheet and I thought the stock rod length was 139mm? Do I have that wrong? Pretty sure the stock length is 142mm Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 30, 2012 Share Posted August 30, 2012 Ok Well if someone can tell me the masses of: Stock rod Stock piston assembly (including rings and pin) ...and the same for the long rod and stroker piston ...I will have a crack at working it out. Quote Link to comment Share on other sites More sharing options...
David P Posted August 30, 2012 Share Posted August 30, 2012 Ok Well if someone can tell me the masses of: Stock rod Stock piston assembly (including rings and pin) ...and the same for the long rod and stroker piston ...I will have a crack at working it out. Someone with those values, probably knows the answer already? Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 30, 2012 Share Posted August 30, 2012 They'll save me a job if they post up then Quote Link to comment Share on other sites More sharing options...
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