StuartW Posted February 13, 2011 Share Posted February 13, 2011 This is the message i sent to cp/carr no reply as of yet hope someone here might be able to speak from good experience Hi I am building my 2JZ motor with your Carr rods, I have used Carr Bolts and they measure 0.010" in length between them, I am presuming they are scrap? I have a new set of WMC bolts un stretched and they measure within 0.002 of each other. "Question,,Do you have the new bolt length for SPS? Am i correct in thinking sps are rated to 300hp per piston and WMC 250hp per piston? i am aiming for 1400hp this drag season with my new GT47/85 Billett T6 set up. So the MAIN Q was are the h beam rods directional? i have a "J" stamped on one side of the Big end cap. I am presuming they fit like the stock rod in orientation of the 2 small cut outs to stop the rod bearings spinning? Thanks in advance Stuart Williams UK Street Eliminator.co.uk SE752" Quote Link to comment Share on other sites More sharing options...
dude Posted February 13, 2011 Share Posted February 13, 2011 The caps have to go on one way Stu, there should be numbers and one side will match, but the 2 cut outs go on the same side. Quote Link to comment Share on other sites More sharing options...
TLicense Posted February 14, 2011 Share Posted February 14, 2011 They can go in in any orientation. Just make sure they're the all the same. You're right about the big end caps though, they need to have the correct orientation relative to the rods. Quote Link to comment Share on other sites More sharing options...
StuartW Posted February 14, 2011 Author Share Posted February 14, 2011 The caps have to go on one way Stu, there should be numbers and one side will match, but the 2 cut outs go on the same side. Yep got that Dude, They are designed with such a good tolerance that they will not fit 180 degrees out! Cheers, But do the 2 cut outs go on the same side as stock? I suspect they do but want to be totally sure. All the rods are stamped with a "J" so caution must be used not to mix up the caps with their relavent con rods. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 14, 2011 Share Posted February 14, 2011 The bearing tang cut outs should face the same side of the block as the stock rods. It's really RPM and piston weight that governs the required strength of a rod bolt. Power has little to do with it. Quote Link to comment Share on other sites More sharing options...
StuartW Posted February 14, 2011 Author Share Posted February 14, 2011 Thanks for replies, Carr DID kindly reply and its Very interesting "Hello Stuart The connecting rods are probably 5-8 years old if there is no indexing dimple as in the newer fasteners. The CARR fastener is always superior to the WMC fastener because of the material used to make them. Just do a visual inspection of the connecting rods and a magnaflux to check for cracks. If none are found then the rods are good to run as long as all the sizing is on specification. You can use ARP lube but we do not recommend this for lubricant. We recommend a heavy duty Loctite anti-sieze or a black moly past for lubricant. You are not trying to achieve the maximum torque value and are looking to reach a stretch value in the range we recommend. You would torque the bolts in like ten pound increments checking the stretch each time to see how much the fattener has grown over its free length. Best regards, Barry Deane Sales & Engineering 1902 McGaw, Irvine, CA 92614 O: 949-567-9000 F: 949-567-9010 http://www.cp-carrillo.com/ Follow us on: A member of Pankl Racing Systems " And this one too Hello Stuart, As long as the CARR fastener stretches properly and give consistent torque values then the fastener is good. The WMC fastener is not going to live at the power level and RPM you are looking to produce. The CARR fastener was designed for high RPMs and multiple stretching. If your CARR fasteners say “CARR SPS” then they would be at least five plus years old and the .010” difference in length was about the norm back then. These connecting rods are not directional and can be install either way. Just install them all in the same direction. The bearing tangs are not to stop the bearing from spinning. The tangs are only for lateral location and the bearing crush is actually what holds the bearing in place and keeps it from spinning. If you have any other questions please feel free to contact me at anytime. Best regards, Barry Deane Sales & Engineering" Quote Link to comment Share on other sites More sharing options...
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