Ausmini
It is currently Sat Aug 16, 2025 11:22 am

Board index » Mini Chat » Mini Chat

All times are UTC + 10 hours




Post new topic Reply to topic  Page 1 of 1
  [ 12 posts ] 
  Print view Previous topic | Next topic 
Author Message
mooman10_0
 Post subject: measurement qu's
PostPosted: Mon Sep 12, 2016 1:26 pm 
Offline
1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
Hi everyone,
A couple of quick questions:
What should the diameter be of a standard 1098 piston be?
Also What is the length of a steering rack? (checking to see if postable)
Thankyou,
Steve
Top
 Profile  
 
simon k
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:03 pm 
Offline
Yay For Hay!
User avatar

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border
mooman10_0 wrote:
What should the diameter be of a standard 1098 piston be?


a smidgen less than the bore

_________________
did I tell you that I won a trophy?
Top
 Profile  
 
timmy201
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:18 pm 
Offline
1275cc
1275cc
User avatar

Joined: Sun Apr 29, 2012 1:19 pm
Posts: 4508
Location: Wollongong, NSW
Should be 64.588mm for std bore. Then up by approx 0.5mm for each 20 thou overbore (so +020 is 65.088mm). The pistons normally have something stamped on them if they are larger than stock - eg 020

_________________
Image
Top
 Profile  
 
mooman10_0
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:27 pm 
Offline
1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
thanks for that, just what I needed :-)
Top
 Profile  
 
winabbey
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:38 pm 
Offline
1360cc
1360cc
User avatar

Joined: Wed Oct 03, 2007 9:04 pm
Posts: 6753
Location: Melbourne, VIC
mooman10_0 wrote:
Also What is the length of a steering rack? (checking to see if postable).

96 cm

They are often shipped in a piece of plastic plumbing pipe.

_________________
ex-NSW Police 1970 MK II Cooper S
VMCI #43
Top
 Profile  
 
mooman10_0
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:57 pm 
Offline
1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
Thanks :-)
Top
 Profile  
 
drmini in aust
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 2:59 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39764
Location: near Baulkham Hills, NSW
Top of a piston is way less diameter than the bore, to allow for thermal expansion.
The bore clearance at the piston skirt is only around .05mm or less, except for race motors running forged pistons, which need more.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
Top
 Profile  
 
deluxe67
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 9:44 pm 
Offline
998cc
998cc

Joined: Mon Jul 07, 2014 12:36 pm
Posts: 612
Location: Bentleigh, Melbourne
Simon K,

Anda nakal!

Indonesian for "naughty person"

Haha....!

_________________
67 Deluxe
Dry suspension
1293cc, 11:1 comp, RE 282 camshaft, 45 Weber, extractors etc
4 synchro close ratio gbox
Cooper S brakes, no booster
Stealth box, as Doc says "goes harder and idles!"
RH tank cos I needed it crossing the Nullarbor etc..
Top
 Profile  
 
850 GT
 Post subject: Re: measurement qu's
PostPosted: Mon Sep 12, 2016 10:14 pm 
Offline
848cc
848cc
User avatar

Joined: Wed Jun 10, 2009 2:42 pm
Posts: 425
Location: In the shed until Rylstone!
Old mate should buy some measuring gear!

_________________
Why is it the things that make me tick, are also the things that make me go boom?
Top
 Profile  
 
simo74
 Post subject: Re: measurement qu's
PostPosted: Tue Sep 13, 2016 8:06 am 
Offline
848cc
848cc
User avatar

Joined: Fri Oct 03, 2014 10:34 am
Posts: 330
Location: Williamstown, VIC
simon k wrote:
mooman10_0 wrote:
What should the diameter be of a standard 1098 piston be?


a smidgen less than the bore


Wish we had a like button. Like

_________________
1972 Leyland Mini Clubman
2000 Honda CBR929RR
Top
 Profile  
 
TheMiniMan
 Post subject: Re: measurement qu's
PostPosted: Tue Sep 13, 2016 5:48 pm 
Offline
Bimmer Twinky
User avatar

Joined: Mon Sep 06, 2004 4:36 pm
Posts: 8606
Location: Brisbane
std 998cc & 1098cc bores are 2.542"

_________________
No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.
Top
 Profile  
 
simon k
 Post subject: Re: measurement qu's
PostPosted: Tue Sep 13, 2016 6:42 pm 
Offline
Yay For Hay!
User avatar

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border
simo74 wrote:
simon k wrote:
mooman10_0 wrote:
What should the diameter be of a standard 1098 piston be?


a smidgen less than the bore


Wish we had a like button. Like


it's nice to be appreciated... my kids like my jokes too

_________________
did I tell you that I won a trophy?
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 12 posts ] 

Board index » Mini Chat » Mini Chat

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 79 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.