Hi All
Has anyone had any experience with boring out to 82mm and using the high compression or a standard piston?
My barrels are measuing a little over 81mm but the tolerance i believe is 1.5 - 2 thou but i am more pushing 5 thou so would be to worn to run new 81mm pistons.
Is there any Pros or Cons going to the 82mm or anything i should be aware of and is there enough meat in the liner to go that far ?
82mm Bore & Pistons
- AustHaflinger
- Posts: 2472
- Joined: Sun Jan 06, 2013 1:27 am
- Location: Canberra Australia
Re: 82mm Bore & Pistons
Hi Ben, I have no knowledge of the pros and cons of boring out the standard barrels and I am not sure there are too many on here who have done it but hopefully someone can help.
My previous owner went to the extreme of modifying 87mm VW pistons and barrels which after a couple of issues have been sorted and work well - but both barrels and pistons required a bit of machining.
Garry
My previous owner went to the extreme of modifying 87mm VW pistons and barrels which after a couple of issues have been sorted and work well - but both barrels and pistons required a bit of machining.
Garry
Haflinger 700AP (73)
Range Rover Sport TDV6 (07)
Landrover FC 101 (77)
Landrover Series 1 SWB Station Wagon (57)
Landrover Series 1 SWB (57)
Jaguar E-type Roadster V12 (71)
Jaguar XJ12C (76)
Range Rover Sport TDV6 (07)
Landrover FC 101 (77)
Landrover Series 1 SWB Station Wagon (57)
Landrover Series 1 SWB (57)
Jaguar E-type Roadster V12 (71)
Jaguar XJ12C (76)
Re: 82mm Bore & Pistons
Thanks Garry
That sort of mod for me would be a bit over the top, I see on Haflingertechnik that you can purchase 82mm high compression pistons so I am leaning to that option so I am guessing it has been done.
A little curious though if having high compression pistons is it going to create other issues as well
That sort of mod for me would be a bit over the top, I see on Haflingertechnik that you can purchase 82mm high compression pistons so I am leaning to that option so I am guessing it has been done.
A little curious though if having high compression pistons is it going to create other issues as well
- AustHaflinger
- Posts: 2472
- Joined: Sun Jan 06, 2013 1:27 am
- Location: Canberra Australia
Re: 82mm Bore & Pistons
Well if Haflinger Technik have the pistons I would be asking Dale (Haflinger Technik) about how much you can bore the standard barrels.
If you are using the standard bored barrels and the 82mm high compression pistons, based on my experience, you will not have any issues elsewhere. The bottom end certainly can handle and extra increase in power without issue.
My engine is 762cc (stroke is standard), has high comp pistons and larger valves and I have had no issues with the standard bottom end.
Garry
If you are using the standard bored barrels and the 82mm high compression pistons, based on my experience, you will not have any issues elsewhere. The bottom end certainly can handle and extra increase in power without issue.
My engine is 762cc (stroke is standard), has high comp pistons and larger valves and I have had no issues with the standard bottom end.
Garry
Haflinger 700AP (73)
Range Rover Sport TDV6 (07)
Landrover FC 101 (77)
Landrover Series 1 SWB Station Wagon (57)
Landrover Series 1 SWB (57)
Jaguar E-type Roadster V12 (71)
Jaguar XJ12C (76)
Range Rover Sport TDV6 (07)
Landrover FC 101 (77)
Landrover Series 1 SWB Station Wagon (57)
Landrover Series 1 SWB (57)
Jaguar E-type Roadster V12 (71)
Jaguar XJ12C (76)
- wojo12
- Posts: 177
- Joined: Fri Nov 16, 2018 7:04 pm
- Location: Bundaberg, Queensland, Australia
- Contact:
Re: 82mm Bore & Pistons
AustHaflinger wrote:Well if Haflinger Technik have the pistons I would be asking Dale (Haflinger Technik) about how much you can bore the standard barrels.
If you are using the standard bored barrels and the 82mm high compression pistons, based on my experience, you will not have any issues elsewhere. The bottom end certainly can handle and extra increase in power without issue.
My engine is 762cc (stroke is standard), has high comp pistons and larger valves and I have had no issues with the standard bottom end.
Garry
Ask Bernard Callahan on this forum. He rebuilds Haf motors all the time.
Re: 82mm Bore & Pistons
Thanks Gents
Thats is a good start to work with and good to know the bottom end can handle the changes
Thats is a good start to work with and good to know the bottom end can handle the changes