TINTIN
Just got it firing!
- Joined
- Dec 3, 2010
- Messages
- 7
Hi all, here is another Norwegian Guzzi racer. Very nice to find a dedicated forum for Guzzi racing!
I have a question about tappets. I'm building a new race engine for next season. I have collected various parts from ebay and by a mistake I bought a California 03 crank case as I forgot that this model had hydraulic tappets. These tappets are of mushroom type with a 15mm shaft (and 22mm head) so the tappet bores are 15mm as opposed to the normal 22mm.
The intriguing thing is that the hydraulic plunger (is that the term?) drops right out of the tappet and can be substituted by a small receptor for a normal pushrod (a little brick with a spheric grove of own manufacture). The big (?) advantage would be a weight saving of 22 gr on each tappet.
What I'm unsure of though, is weather these tappets will be strong enough run in a race engine.
Another unknown is that these Cali tappets don't have the usual radius but are ground flat. However it does work on the Cali, doesn't it?
Does anyone of you have any experience with these tappets or any opinion? Why did Guzzi change the tappet design in the first place instead of just fitting hydraulic plungers in the normal 22mm tappets?
I have a question about tappets. I'm building a new race engine for next season. I have collected various parts from ebay and by a mistake I bought a California 03 crank case as I forgot that this model had hydraulic tappets. These tappets are of mushroom type with a 15mm shaft (and 22mm head) so the tappet bores are 15mm as opposed to the normal 22mm.
The intriguing thing is that the hydraulic plunger (is that the term?) drops right out of the tappet and can be substituted by a small receptor for a normal pushrod (a little brick with a spheric grove of own manufacture). The big (?) advantage would be a weight saving of 22 gr on each tappet.
What I'm unsure of though, is weather these tappets will be strong enough run in a race engine.
Another unknown is that these Cali tappets don't have the usual radius but are ground flat. However it does work on the Cali, doesn't it?
Does anyone of you have any experience with these tappets or any opinion? Why did Guzzi change the tappet design in the first place instead of just fitting hydraulic plungers in the normal 22mm tappets?