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Join Date: Dec 1969
Location: Montreal
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Biral Cylinders question

I need to change the cylinders on my 911 1971.
I found this 84mm Porsche 911 2.2/2.4 Engine Biral Cylinder Set on AA Performance website:
84mm Porsche 911 2.2/2.4 Engine Biral Cylinder Set | AA Performance Products
Does anybody can tell me if it is an acceptable quality for a car to be driven less than 5000 miles per year and no track racing?
Thanks,
Francois
Old 06-24-2016, 06:37 PM
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Puny Bird
 
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Do a search of this forum, this question has come up many times before.
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Old 06-24-2016, 07:36 PM
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In theory those are nice cylinders. I would want to know if they have been honed or bored over size. I can't imagine they are stock size and in spec.

Once you have a machinist figure out if the cylinders are in spec the next step is finding some matching pistons.

You might want to shop around.
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Old 06-24-2016, 07:52 PM
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Quote:
Originally Posted by Mark Henry View Post
Do a search of this forum, this question has come up many times before.
Hi MARK did you use them lately i might be interrested to use them for stock 2.2T.THANKS
Old 06-25-2016, 03:33 AM
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There is a guy in the UK who seems to have experienced issues but he bought Barrels and JE Pistons as a set.

The clearances were apparently poor.

When he published numbers the barrel diameters at 84mm looked bang on but piston ring gaps were horrid.

They barrels/pistons arrived assembled and no-one took them apart and made any checks before building the motor.

I have seen the barrels and they look OK.
Old 06-25-2016, 05:58 AM
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Quote:
Originally Posted by pors1968 View Post
Hi MARK did you use them lately i might be interrested to use them for stock 2.2T.THANKS
I've only used the iron cylinders for the type 4 builds, they seem to be OK quality, but about 15,000km is all I have on a set, so long term value is still unknown.

I won't use AA pistons or the grant rings they sell, I use Hastings (96mm, KB pistons) or Deves rings for stock sizes.
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'67 Bug, 2600cc T4
'67 Bus, 2.0 T1
Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend.

Last edited by Mark Henry; 06-25-2016 at 06:37 AM..
Old 06-25-2016, 06:33 AM
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Thanks to all for your responses.
Old 06-25-2016, 06:50 PM
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If you buy them, measure them for bore size, ovality and taper. Also check the cylinder heights. The one set I used had one cylinder that was too high and had to be machined to match the other five.
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Old 06-26-2016, 04:07 AM
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