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Old 01-24-2008, 06:10 PM   #1
96SubyImpreza
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Default Need a CR estimate!!

Can someone help me estimate the CR on a 2.2 with Phase I DOHC hydraulic lifter heads+the old metal 96 headgaskets?????? stock pistons.

and then what would the same build with EJ22T pistons offer???
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Old 01-24-2008, 06:22 PM   #2
96SubyImpreza
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Why does it seem like no one can help me with this question?????!?!

i know atleast one of you knows!!!!!!
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Old 01-24-2008, 06:54 PM   #3
mick_the_ginge
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12 minutes is not enough time for a response.

You also need to supply far more data to do a CR calculation. Search for the other threads on similar topic and you will see what other data is needed
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Old 01-24-2008, 07:18 PM   #4
MartinSTi05
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About 3......
You need to give us 1. the chamber volume of the heads, 2. the volume of the piston/above the rings, and 3. the compressed thickness of the head gasket. Otherwise there is not too much we can do to help you.
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Old 01-24-2008, 09:51 PM   #5
96SubyImpreza
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well like i said earlier we're assuming its all stock, and I'm just looking for some kind of rough estimate.
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Old 01-25-2008, 01:35 AM   #6
eastcoastbumps
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Old 01-25-2008, 02:14 AM   #7
ballitch
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9.00:1 Cr for the stock ej22 pistons, 7.50:1 w/ EJ22T pistons.... but thats with a 1.5mm HG (.060'') which is the stock EJ25D HG, I think its also the same thickness as the ej22t, it is, just checked.



~Josh~
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Old 01-25-2008, 03:01 AM   #8
Marnix
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I think it will be around 8.9:1 based on stock EJ22E pistons, 1.37mm head gasket thickness and 46cc volume of the clover-style combustion chambers of the heads.
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