Biral Cylinders question

[FOZZY]

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

[Mark Henry]

Do a search of this forum, this question has come up many times before.

[Trackrash]

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.

[pors1968]

Originally Posted by Mark Henry

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

[chris_seven]

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.

[Mark Henry]

Originally Posted by pors1968

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.

[FOZZY]

Thanks to all for your responses.

[tom1394racing]

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.