Thanks for commenting, I have not forgotten about this thread and the missing damper, one person has it correct. I will reveal all on my next livestream, which is going to be monday 9th September at 2000hrs BST cya there…..
The available vacuum and the weight of the piston are balanced I do remember putting brake fluid in the damper on the 998cc Engine In my opinion the 850 mini should be the standard car today
much like the stiff carb piston in the dual setup, the single HS2 was probably original with a significant amount of friction for the piston to housing. depending on the oil used you could go without the damper if it is able to slow the piston drop enough.
I heard somebody say that you have to look at the SU piston damper the way a suspension damper works and these would not work without a piston with inner valves. Well, damping is all about friction, fluid friction in hydraulic dampers. Perhaps in this case the piston itself generates enough friction to dampen itself?
A resistive force created by a small aperture. That should work. It raises several questions; how was it tuned and why was this SU designed with a damper. Nice😊
Just out of curiosity can plugs like that be cleaned up ok with a wire brush? I know new ones aren’t expensive and anyone would put new ones in. I’m thinking for while I get the carb/timing right. And then put the new ones in. Or does wire brushing them damage them. Cheers
Wire brush won’t be enough, a blowtorch would also usually be required. However this sort of damage is best cured by simply replacing them. I also lean off the carbs before restarting to avoid the same problem happening again.
The last one, is the correct sound of that door. Excellent.
Thats exactly what I was thinking when I saw that door close and latch properly
Thanks for commenting, I have not forgotten about this thread and the missing damper, one person has it correct. I will reveal all on my next livestream, which is going to be monday 9th September at 2000hrs BST cya there…..
The available vacuum and the weight of the piston are balanced
I do remember putting brake fluid in the damper on the 998cc Engine
In my opinion the 850 mini should be the standard car today
If the piston weight matches the application no damper required, the damper allows one design/weight of piston to be used on different engines.
much like the stiff carb piston in the dual setup, the single HS2 was probably original with a significant amount of friction for the piston to housing. depending on the oil used you could go without the damper if it is able to slow the piston drop enough.
I heard somebody say that you have to look at the SU piston damper the way a suspension damper works and these would not work without a piston with inner valves. Well, damping is all about friction, fluid friction in hydraulic dampers. Perhaps in this case the piston itself generates enough friction to dampen itself?
A resistive force created by a small aperture. That should work. It raises several questions; how was it tuned and why was this SU designed with a damper. Nice😊
I'm gonna guess the airflow into the carb is so poor that the damper doesn't get forced up when the throttle is opened hard?
Faster rising, falling piston reaction for smother running my guess
Just out of curiosity can plugs like that be cleaned up ok with a wire brush?
I know new ones aren’t expensive and anyone would put new ones in.
I’m thinking for while I get the carb/timing right.
And then put the new ones in.
Or does wire brushing them damage them.
Cheers
Wire brush won’t be enough, a blowtorch would also usually be required. However this sort of damage is best cured by simply replacing them. I also lean off the carbs before restarting to avoid the same problem happening again.
Never take a wire brush to a plug your scratched the ceramic if the plug is new and foul get the mixture right and it will clear self
The spring is doing the job of the damper?
The piston is weighted to dampen movement?
My guess is the 850 don’t produce enough vacuum to require a piston damper?
Don't need the damper because it is raicing to fast?