Page:
Home > Technical Chat > CR... Bugger

advantage998

458 Posts
Member #: 1840
Senior Member

Kings Lynn, Norfolk

23rd Jul, 2010 at 10:40:44pm

Well these are my calculations:

1293 / 4 = 323.25cc
head chamber = 20.5cc
head gasket = 3.8cc
piston dish inc cutouts = 11.5cc
deck volume and ringland = 1.5cc ?? pure guess

323.25 + 37.3 / 37.3 = 9.66:1


Deck and ringland if not too sure on, the pistons are 15 thou below the deck and they are omega cast 10cc dish.

Am i right in thinking 9.66:1 isn't realy suited to a 20psi charged k100 engine? I was planning a max of 9:1, but the block needed a bigger skim than planned.

Joe C

User Avatar

12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

23rd Jul, 2010 at 10:58:28pm

just the deck height at 15 thou will be 1.5cc, you can prbably call it 2cc min for deck and ring land, still only gets you to about 9.4 though,

best option is to take the dishes put bigger, if you can find 4.5cc in the piston you are at 8.7 which should easily be ok on the K head on 20 psi

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Sprocket

User Avatar

11046 Posts
Member #: 965
Post Whore

Preston On The Brook

23rd Jul, 2010 at 10:58:38pm

I needed to use 18cc pistons to get a k1100 head dowm to around 9:1 with zero deck hight and 18.5cc chambers

Ring land volume is usualy around 0.5cc, and gasket volume will depend on the type of gasket

On 26th Oct, 2004 TurboDave16v said:
 Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........

matty

User Avatar

8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

23rd Jul, 2010 at 11:38:12pm

Mine works out to be 9.1:1 using 15cc pistons + 2cc for the valve cut outs. *oh well*

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

advantage998

458 Posts
Member #: 1840
Senior Member

Kings Lynn, Norfolk

24th Jul, 2010 at 09:33:05pm

Thanks for the help guys i will see what i can do on the lathe to get a bit more dish in the pistons.
Home > Technical Chat > CR... Bugger
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: