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Old 02-24-2016, 07:49 PM   #1
simer1228
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Default Oil squirters + stroked EJ20 is a no-go

In a stroked EJ20 (possibly stroked EJ22's also) the pistons contact OEM oil squirters approximately 5mm before reaching BDC.

Thoughts on machining a relief into my pistons or 5-6mm off the top of the squirter? If all else fails, they'll get plugged

JDM EJ20G - converted to #5 thrust bearing
EJ257 crank
EJ257 rods
Mahle PowerPak stroker pistons - 92.5mm, 8.0:1 CR

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Last edited by simer1228; 03-07-2016 at 11:42 PM.
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Old 02-24-2016, 08:34 PM   #2
DisoDisp
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Notch the pistons or remove the squirters.
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Old 02-25-2016, 02:58 PM   #3
maciek
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Wierd....I stroked an ej22t and it was fine with squirters.
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Old 02-25-2016, 03:17 PM   #4
rtv900
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Quote:
Originally Posted by DisoDisp View Post
Notch the pistons or remove the squirters.
yeah
a minimal notch out on that web would do it without hardly sacrificing any strength.
You could even do it with a carbide burr by hand if you don't have reasonable access to equipment.

Hard to know how the squirters will be affected depending what the nozzle is like inside if you cut that down. It might mess up the squirt.
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Old 02-25-2016, 11:31 PM   #5
fastblueufo
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Try a different piston. I've stroked a few with JE pistons and never had an issue contacting the squiter.
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Old 02-26-2016, 12:44 PM   #6
Paul
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Is it really worth keeping them? Id just plug them im sure it's fine but notching the Pistons would worry me.
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Old 02-27-2016, 07:00 PM   #7
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An endurance race engine piston lives and dies by a good squirter arrangement...but we're not at that level.

If you have notched big ends on your rods, you don't NEED those squirters on a street or street and strip car.

I would however look at getting some JE's in there.
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Old 03-08-2016, 12:50 AM   #8
simer1228
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I consulted with a few very reputable engine builders and also read the opinions of forum members, here and there. I decided to take advantage of having oil squirter's and milled a relief in the Mahle pistons.

If it's true that JE's clear squirters without modification I will certainly consider going that route if I ever cross this bridge again.

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Old 03-10-2016, 05:30 PM   #9
monkeyposeur
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Did you pressure test the squirters? I had to go through two sets to get one good set. You can also get new squirters from roger Clark motorsports in the UK. Make sure you use some red loctite in the threads.
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Old 03-11-2016, 12:46 AM   #10
simer1228
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They were cleaned and tested to make sure they weren't clogged. Definitely needed to be cleaned. Loctite was used although I didn't see any sign of loctite being used prior.
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