sr20det lash killer questions

[r1jlewis]

I am trying to find out some information on my HKS lashkiller kit. I have an S15 SR20DET swap done and i have recently purchased some performance parts for it. I am installing a set of HKS stage 3 cam shafts, JWT cam gears, Greddy valve springs and retainers and a HKS lashkiller kit. The main problem is the lashkiller. It says that you have to shim the lifter for the application but how do i achieve the correct shim size? Is there any tollerances allowed? Any information or links would be greatly appreciated.

[180fan]

Feeler gauges between the cam and the rocker arm. Rotate to the "non-humped" most part of the cam, and measure there.

[USsil80]

what all did you get with the lash killer kit just a peice to replace the stock oil preasurize piece that pushes on the rocker arm

[r1jlewis]

pretty much so. The guy said that it was an HKS kit but i have never actually seen the HKS kit. I swear that the look like the factory lifters that were just taken apart and he just put a shim in them to make them solid, but i have a picture of the HKS's and they look a same. It's very hard to tell the difference from just looking at a picture. On the JUN website, it shows three different types of lifters. 1, factory hydaulic, 2 shim style inside of the lifter and 3, a solid lifter and they shim the top of the rocker arms. I just can't figure out how to find the exact shim size that goes inside of the lifter that i have. If for say that there is 1mm of gap between the lobe and the rocker, does that really mean there needs to be a 1mm shim in the lifter to compensate?

[dustyk]

Pretty much what you are doing is replacing the stock HLA with a solid piece of metal. Where the HLAs adjust the clearance between the cam and the lifter automatically, you now have to adjust the clearance between the lifter and the cam manually. You need to measure the clearance between the lifter and the cam for the all 4 valves for each cylinder. You set the motor to TDC for cylinder 1, measure the clearances, then do the same for the 3 other cylinders. After you figure out what your clerance is and what the clearance should be, you do the math to figure out what shim or combination of shims you need to get the right clearance. So for example, say that hypothetically your current shim is 4mm thick, you have a measured clearance of .3mm and you need the clearance to be something else. You would need to get a thicker shim if your measured clearance is too big and thinner shim if the measured shim is too small.

Hope that helps

[r1jlewis]

Thank you for the info, I will give it a shot.