mini pistons 998 strange differances i dont understand
Turbo Mini Forums

i was looking at mini pistons for the 998 whilst searching for some other pistons for my dads car

i noticed the flatop pistons upto 1986 had a C/R 9:3:1 & the same pistons (same modal number etc) from 86-92 had a C/R of 10:3:1

whats that about, do the rings have an affect, they were the same piston, both A+ where there head differances

Edited by clubminiflip on 16th Jul, 2007.

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

do the rings have an affect on the compression? i thought it was to do with the dish in the piston?

or have a confused myself again, it happens alot

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

I dont think the rings would have much to with the compression. There is a slight gap between to the top ring and the top of the piston all the way around. I always assumed it was dish and the combustion chamber.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

thats what i'm reading everywhere i'm chking, just thought it was strange as they were the same pistons i was looking at just differant years of A+ engine, my local place has them at a reasonable price so gonna pic some up for the engine thats coming out of the car, do it when ya can & enjoy it i say!

i've just gone on the vizard book, will n bens advice + others on here axel etc to calc my C/R
which is usually cylinder bore/ head chamber size/piston dish/gasket thinkness compressed & gap between the piston top & block deck if there is one

cheers

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer