Thread: Valve Shims
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Old 07-06-2012, 09:15 PM
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WMarshy WMarshy is offline
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Join Date: Apr 2009
Location: Mexico NY
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Originally Posted by blkryno View Post
Here's what my valve #'s were:
1 2 3 4
I-.08 .08 .08 .05
E-.18 .10 .15 .19

Here's what the shims were that were in and then the shims I replaced them with.
#1 I-Y280/.275 E-Y300/.290
#2 I-Y280/.275 E-Y295/.280
#3 I-Y280/.275 E-Y290/.280
#4 I-Y300/.290 E-Y290/.285
Assuming your clearance listed above is correct (in mm) and given the shims you swapped, your new clearances would be as follows.

1, 2, 3, 4
I- 0.13, 0.13, 0.13, 0.15
E- 0.28, 0.15, 0.25, 0.24

Your number 2 Exhaust is still below spec... you sould have went with a 2.85 shim to get 0.20 clearance (which would still be on the tight of the tolerance side I believe).
'79 XS11 F
Stock except K&N

'79 XS11 SF
Stock, no title.

'84 Chevy K-10 "Big Blue"
GM 350, Muncie SM465, NP208, GM 10 Bolt with 3.42gears turnin 31x10.5 Baja Claws

"What they do have is an implacable, unrelenting presence and movement that bespeaks massive power lurking behind paint and chrome. They don't wail like a screeching ninja, the don't rumble like a harley. They just growl like a spactic, stressed out badger waiting to rip your face off and eat your soul." Trainzz~RIP~
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