tchamber

I was just wondering what my 95GTs stock cam lift and duration is.

mkspeed26

look it up <IMG src=smileys/smiley2.gif border="0">

tchamber

OK OK, I did the research, .444" lift with 1.6 ratio rockers, and with the 1.7 rockers I have it will be .4717".

T5superduty

I thought it added .30 not .27</P>

Buzzstang

need an x-303?

T5superduty

I dont think you can run an X with a stock motor.. needs piston mods and stuff I believe

tchamber

Here is the site I found the info at, it's pretty cool.</P>


http://hometown.aol.com/mu50stang/calc.htm</P>


That's where I got the .027 from too.</P><edited><editID>tchamber</editID><editDate>38018.9964351852</editDate></edited>

mkspeed26

i knew you could do it <IMG src=smileys/smiley2.gif border="0"></P>

horatio102

You're changing a ratio, not a constant. The difference should vary by cam.

.444 @ 1.6 = .2775 @ the cam
.2775 X 1.7 = .47175

so the difference on the stock cam is .02775

If the stock cam was .500@ 1.6, then the difference would be .03125 by switching to 1.7 rockers. If stock = .400, then the difference would be .0250

tchamber

I don't know how they come across their forumulas, but assuming they are correct, the ratio of the roller rockers would indeed change the lift. The rocker arms are basically pivor points, with the valves on one end and the push rods on the other. Now if the push rod side is shorter than the valve side, the ratio is a given. But, as with my 1.7:1 rocker arms, the given changes, changing the ratio. This in turn changes the lift. The shorter the push rod side, or longer the valve side, the higher the lift. Right?