Reply With QuoteThe ratio is the ratio - distance between the center axis and where it contacts the valve and pushrod. An offset bushing would change the ratio. Shorter towers would change the contact patch on the stem.Originally Posted by Radar
Do longer pushrods change rocker ratio? 2TC
trying to change the STD 1.32 rocker ratio of my 2TC to 1.4 on the cheap.
Could I do this by buying 0.096" longer pushrods?
or shave .08mm off the rocker towers and use the std pushrods?
Cheers
Last edited by Radar; 28-02-2010 at 07:39 PM.
Re: Do longer pushrods change rocker ratio? 2TC
The ratio is the ratio - distance between the center axis and where it contacts the valve and pushrod. An offset bushing would change the ratio. Shorter towers would change the contact patch on the stem.
'I've scrapped better.' John stated when asked about the car by the guy with the silver tipped cowboy boots!
Re: Do longer pushrods change rocker ratio? 2TC
No idea how rocker arms work so I just took a stab at it...
Cheers for clearing that up, so in other words there is no other way to change the ratio without changing the rocker arms them selves?
Also whats an offset bushing ?
Re: Do longer pushrods change rocker ratio? 2TC
the rocker ratio IS the rockers???
ie, length of valve side of rocker : length of cam side of rocker.....
offset bushing is a bushing that is offset to one side??
err...
how come you have such a non standard cam/valve springs and no idea how to use them?
are they from the same engine? who did you buy them off? surely they have the rockers and rocker towers you need?
"I'm a Teaspoon, not a mechanic"
"There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)
AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!
Re: Do longer pushrods change rocker ratio? 2TC
Haven't bothered to read about rockers yet so I wasn't entirely sure.
I understood there's a ratio involved just didn't understand how it came to be.
I do now though, cheers heaps for that.
Should of done some reading before asking silly questions.
Last edited by Radar; 28-02-2010 at 07:40 PM.
Re: Do longer pushrods change rocker ratio? 2TC
I would think the cam would still work with the 1.32 rockers but would just give you slightly less lift at the valve.
Re: Do longer pushrods change rocker ratio? 2TC
maybe it is time to buy a basic engine book? or look at the engine to see how it works?
but seriously, to buy a cam before you even know how to use it seems odd...
bothering to find out before buying is the normal way to do it
good luck
"I'm a Teaspoon, not a mechanic"
"There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)
AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!
Re: Do longer pushrods change rocker ratio? 2TC
I've got a fairly good grasp on how an engine works works mate, I know why I chose the cam as well...
I just honestly didn't understand how a rocker ratio came to be.
.
But you've cleared that up for me so again cheers.
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