strokersquid Posted May 3, 2010 Author Report Share Posted May 3, 2010 well, then you have only established that it is a long rod....as for the edge of the webbing, you cannot rely on distance to the outter circumference of the webbing, as they vary with different cranks, otherwise, 10 mill would just about be out of the webbing, and verry unballanced. seriously, though, you need to measure the rod pin center distance from crank center...you can use the bearing as a reference point. if it has longrod pistons, only 4mill domes, and a 4mill 1.5mm plate, then it could possibly be a 7 mill.......you won't know untill you measure, because even running the wrong pistons, 2mm recessed domes and 1.5mm plate will not clear, even on stock stroke Quote Link to comment Share on other sites More sharing options...
strokersquid Posted May 3, 2010 Author Report Share Posted May 3, 2010 the crank he took out matches the 4mm longrod crank I have. I bought the engine on the RZ forum, it was advertised as a 4mm stroker engine.How would I know if its a 7mm stroker ? I dont think Hotrods makes a 7mm crank. The webs are the same size as a 4mm Hotrods. 7mm would likely be larger, right ? Quote Link to comment Share on other sites More sharing options...
strokersquid Posted May 4, 2010 Author Report Share Posted May 4, 2010 bump for somebody smarter than me. i'm intrigued by the though of a 7mm stroker but i think youd need the cases trenched, right ? Quote Link to comment Share on other sites More sharing options...
AKheathen Posted May 4, 2010 Report Share Posted May 4, 2010 well, the only reason i believe it could be something other than 4mill is the fact that you stated to have recessed domes and spacer plate. it's pretty easy to compare the 2 cranks. if you look in the webbing behind an outter bearing, you can see where the rod pin comes through. measure from the edge of the bearing to the edge of the pin. as for 7mill, i may be wrong, i don't remember, but i think the point of going 7 mill instead of 10 is to avoid case work. Quote Link to comment Share on other sites More sharing options...
uwenr Posted May 4, 2010 Report Share Posted May 4, 2010 well, the only reason i believe it could be something other than 4mill is the fact that you stated to have recessed domes and spacer plate. it's pretty easy to compare the 2 cranks. if you look in the webbing behind an outter bearing, you can see where the rod pin comes through. measure from the edge of the bearing to the edge of the pin. as for 7mill, i may be wrong, i don't remember, but i think the point of going 7 mill instead of 10 is to avoid case work. Cases need to be trenched for a 7 mil Quote Link to comment Share on other sites More sharing options...
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