Thread: Mad's GT-R
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Old 05-14-2016, 11:57 PM   #26
themadscientist
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Drives: 2015 WRB BRZ Spec S
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Status report: The car is still in the body shop getting the engine compartment sorted out, the cylinder head is still up at NAPREC getting machined to within an inch of its life and the engine block is still coming. More goodies have arrived. I think I'm getting close to being finished sourcing parts.



First, cam sprockets and lifters. My engine builder is getting the cams, springs, retainers, keepers and shims, NAPREC is providing the larger valves, but Tomei is out of stock on sprockets and lifters. Luckily, Tomei USA had some in stock. I was offered HKS sprockets, but I don't like only having three bolts locking the sprocket down. I'm sure there are few instances of failure, if any, but I just want maximum clamping. The Tomei sprockets have five bolts so good to go. The lifters are required because of the lift on the cams. They are 10.25 so factory height lifters won't work with that base circle. NAPREC also has to hog out the casting to let those things actually spin in the head.





I ordered ARP studs and bolts, but I forgot that I told ole boy to use some Tomei head and main studs. Not sure why I did that. They are more expensive and no better. Oh well, I know I'll be building another RB26 so I have those parts already. I will be using the flywheel bolts at least.



This is a crucial component, the harmonic balancer. I'm very serious about combating vibration in the rotating assembly. That has a lot to do with the fully counterweighted crankshaft which, owing to how beat up it got in transit, will probably be heading back into the machine shop for a check and possible rebalance. The ATI unit is rated highly and seen on many big power builds.




It comes with 360 degrees of timing marks and a water pump pulley.


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