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Old 04-17-2008, 08:18 PM   #1
xbcaraudio
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Member#: 76912
Join Date: Dec 2004
Vehicle:
2002 WRX MT
WRX RALLY BLUE

Default JE 2618 Pistons Ring gap & valve notches...

I just checked the top and second ring gap on my S3L build and look what i found:

Top ring: 0.010"
Second ring: 0.018"

Itīs that ok, or i should need to open the gap on both rigns? Whats the recomended ring gap for a built motor and 35R turbo

The pistons are JE crawford customs to be used with + 2mm long Rods.
What about these pistons without valve notches & DPR stage 2 cams , Itīs that oK?.... or the valves will hit my pistons?

Thanks in advance for your suggestions...

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Old 04-17-2008, 08:30 PM   #2
mick_the_ginge
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Location: Portland, Oregon
Vehicle:
2003 Sleeved 2.5
Oil Dry Sump Goodness

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I think JE recommends 0.0055 per inch diameter of cylinder, so that top ring end gap is a little small.

If you are worried about valves hitting it's easy to measure. clay the top of the pistons, bolt on the heads with a used gasket of the desired thickness, tdc the piston and rotate the cam by hand.
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Old 04-17-2008, 09:11 PM   #3
reddevil
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http://www.cppistons.com/catalogs/mi...ochRing3hr.pdf

These are the same as JE reccommended for my JE pistons.
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Old 04-17-2008, 10:21 PM   #4
xbcaraudio
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WRX RALLY BLUE

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Quote:
Originally Posted by mick_the_ginge View Post
I think JE recommends 0.0055 per inch diameter of cylinder, so that top ring end gap is a little small.

If you are worried about valves hitting it's easy to measure. clay the top of the pistons, bolt on the heads with a used gasket of the desired thickness, tdc the piston and rotate the cam by hand.
Thanks... that,s what Iīm going to do... pre assembly the engine and measure the clearance with a used gasket...
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Old 04-17-2008, 10:23 PM   #5
xbcaraudio
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Quote:
Originally Posted by reddevil View Post
http://www.cppistons.com/catalogs/mi...ochRing3hr.pdf

These are the same as JE reccommended for my JE pistons.
Thank you... I will follow the recomendations of CP and JE on the gap settings
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