> We all spend our time trying to quiet the valve clatter from the Triumph
> engines.
Maybe you do, I can't hear it over the rumble of the exhaust.
> What are pros and cons, and are any available for the TR6?
The reason the performance people used to hate hydraulic lifters is because
if you run into even the slightest bit of valve float, factory hydraulic
lifters will "pump up" and hold the valves open all the time. The engine
will either die or drastically loose power. And, it will burn exhaust
valves if run in this condition for more than a few minutes.
There are several solutions to this problem, the most obvious is to engineer
the valve train so it doesn't float at max rpm (and use some other method of
limiting max rpm).
The problem with adding hydraulic lifters to a TR6 is that they require oil
under pressure. The solid lifters are only 'splash' lubed, so you would
have to drill the block to add new oil passages to each lifter. Then you
would have to find lifters that fit (or sleeves to make them fit), shorter
pushrods, and a custom-ground cam (lobe profiles are different for hydraulic
lifters). Seems like an awful lot of work to me ...
Randall
/// triumphs@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe triumphs
///
/// or try http://www.team.net/cgi-bin/majorcool
|