Head Gasket Compressed Volume
Turbo Mini Forums

Yep just done it again and it works out at 8.09:1

Bore 71.12 mm
Stroke 81.4 mm
Compression Ratio 8.09:1
Gasket Volume 2.80cc
Ring land Volume 0.78cc
Piston Volume 11.00cc
Head Volume 29cc
Deck Volume 2.02cc

Edited by Doodmeister on 15th Apr, 2005.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

cheers dude

Gasket Volume 2.80cc?

What gaket is that then?

Not trying to be funny Dave but you make me LMAO the way you question everyone except yourself.

The volume was taken from a compressed gasket measuring 71.8mm x 0.69mm = 2.79cc
I hope I got the calc right.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

I was trying to be funny there. I justforgot the smiley and the LOL thingy... I thought it was ammusing we'd had a dozen posts on the subject and we all still have different numbers.

For example, "What gaket is that then? LOL "





ps - You always brighten my day aswell.

It's an old BK450 and my calc seems to come close to the volume spec at the link below not that means much being from MiniSpares

http://www.minispares.com/Product.aspx?pid=37447

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

That's true enough - I was just using the figures posted by stuart.
Left all my old BK's in Manchester!

Have you got it to hand then? I'm sure I noted once that they aren't exactly round - that they 'oval' slightly where the firing rings come into proximity with each other... It might have been a copper gasket however. Man my memory sucks.

As you can see from the HUGE picture the centre two volumes would be smaller due to them being in the vicinity of the narrower portions of the gasket. The outside two seem not to be as effected by the end parts of the gasket when compressed and so maintain their shape better.
And i know it's not a gasket normaly used on a turbo but it's all i have laying around.

Sorry about the size but i couldn't get the clarity any otherway.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

3/8ths of f**k all then!

That about sums it up LOL.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

back to the top...

careful peeps its an old thread

Alex

AlexF

On 13/04/2005 22:48:45 the shed said:

WOW i have used my head gasket 4 times now think its time for a new one
fuynnily enough ,i beleive you,lol

slap it together works every time

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any one taken into account the bore size in the gasket changing as you squeeze it !!!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

450 gasket ,
cyl 1 73.08 along the block73.89 across the block,
cyl 2,,72.16/73.64 ,,cyl 3 ,,72.14/73.66 ,,cyl 4 ,73.36/73.82//
therefore cyl 1 averages out to 73.485 //
cyl 2,,72.9avg/cyl 3 72.9avg//cyl 4 73.59.
overall avg 73.21mm
gasket thickness of fire ring next to bore on used gasket .94mm,therfore volume avg is 3.95cc.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Ha ha , lol.....

And if there were two of them ....lol....

Don`t mention spacer plates......

I know , i know im sorry , it just makes me grin !!!

Intercooled 1293 cc Turbo +
March 06,4psi and counting .
Its now gone up to 8psi.
Nov 06,10psi +.
And now part of the Airbourne club.

group a gaskets should give exactly the same volume as standard because the extra fire ring is compressed down into the recess machined into the block , and after all its just a standard gasket with an extra fire ring fitted over the standard one