Joined Aug 2016
166 Posts | 85+
NSW Australia
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
Joined Aug 2016
166 Posts | 85+
NSW Australia
Yeah, I guess it's really going to depend on what type of head gasket your going to run too.
Think I read that you can get away with OEM with a 102mm piston? :dontknow:
It's worth noting that lubricating the threads will increase the tension too. I like to do it for consistency between the fasteners.
Damo
Think I read that you can get away with OEM with a 102mm piston? :dontknow:
It's worth noting that lubricating the threads will increase the tension too. I like to do it for consistency between the fasteners.
Damo
Joined Sep 2013
369 Posts | 209+
canolbarth cymru
Cheers Damo
Cheers Bushie
Iron liner on it's way from Westwood so I intend keeping oil, water and compression inside the motor by torquing down a little harder than standard spec.
Gonna have to check valve to piston clearance just in case there's an issue with the 1mm oversize I'm using. I'd be surprised if there was but I'd be daft not to check!
Cheers Bushie
Iron liner on it's way from Westwood so I intend keeping oil, water and compression inside the motor by torquing down a little harder than standard spec.
Gonna have to check valve to piston clearance just in case there's an issue with the 1mm oversize I'm using. I'd be surprised if there was but I'd be daft not to check!
Joined Aug 2016
166 Posts | 85+
NSW Australia
Hi guys, I have a JBS piston in my engine. The numbers on the piston read
10827M10200
5423D
I purchased it years ago as a 680 kit. Just wondering if anyone an point me in the right direction to a Wiseco ring set?
TIA
10827M10200
5423D
I purchased it years ago as a 680 kit. Just wondering if anyone an point me in the right direction to a Wiseco ring set?
TIA
Joined Sep 2013
369 Posts | 209+
canolbarth cymru
Awesome!! Thanks Canolman I will do some phoning around today. Do you have the 2004 or 2005 engine?
Joined Sep 2013
369 Posts | 209+
canolbarth cymru
Joined Aug 2016
166 Posts | 85+
NSW Australia
Hey there canolman,
Most piston manufacturers (CP, Ross, ACL) recommend a ring end gap of between 0.015" - 0.018" for our 4" bore size.
So converted to metric, 100 mm bore will be 0.38mm - 0.46mm
I note in the workshop manual it states 0.6mm MAX for comp and 0.8mm for oil but no MIN value. Normally the oil is the slightly smaller but I suppose these are max clearances? Interesting.....
Hope this helps mate
Damo
Joined Sep 2013
369 Posts | 209+
canolbarth cymru
With the ribs on this liner I had to be a bit creative when fitting the piston and liner as it won't slide in. The balancer timing marks are a bit tricky too but where there's a will there's a way.
The liner is an exact copy of the two JBS liners I have and is a fraction smaller diameter where the cases clamp together at the head, steel having a different expansion rate? I have two spare sets of cases and when all three liners were clamped in (upside down) all could be pulled out easily, the standard liner could also but a little tighter, surprised me that as I thought they were clamped tight but I suppose the head holds the liner down under the 'top hat'?
The liner is an exact copy of the two JBS liners I have and is a fraction smaller diameter where the cases clamp together at the head, steel having a different expansion rate? I have two spare sets of cases and when all three liners were clamped in (upside down) all could be pulled out easily, the standard liner could also but a little tighter, surprised me that as I thought they were clamped tight but I suppose the head holds the liner down under the 'top hat'?
G'day Canolman, do you have dimensions for this liner?
Also what's the idea behind going with cast iron rather than a billet aluminium?
Cheers!
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