roller rocker ratio
02-19-2008, 08:33 AM
#2
TECH Junkie
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the rockers multiply the lift that was designed into the cam.
so the lobes on the cam actually have something like 0.325" of lift.
1.7 ratio is stock, so multiply those and you get a final lift of 0.553" which is what the cam would be advertised as.
now the same cam with 1.8 rockers would result in 0.585" of lift....which will make more power due to more air flow.
so the lobes on the cam actually have something like 0.325" of lift.
1.7 ratio is stock, so multiply those and you get a final lift of 0.553" which is what the cam would be advertised as.
now the same cam with 1.8 rockers would result in 0.585" of lift....which will make more power due to more air flow.
02-19-2008, 10:46 AM
#3
Staging Lane
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I would recommend buying your cam first before you buy your rockers. So you dont have any PTV(Piston to valve clearance) If you are going to eventually buy a cam. If you arent ever going to buy a cam, buying rockers is an easy way to up your lift with out buying a new cam.
02-19-2008, 11:42 AM
#4
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and MOST aftermarket cams are too aggressive to run higher ratio rockers. they usually state that in the description.
besides, stock rockers are pretty darn efficient. lots of high hp guys are running stockers.
only reason i have mine is cause i got a KILLER deal on them brand new. turns out they're needed for running the TFS heads...which i'd love to put on the car...someday.
besides, stock rockers are pretty darn efficient. lots of high hp guys are running stockers.
only reason i have mine is cause i got a KILLER deal on them brand new. turns out they're needed for running the TFS heads...which i'd love to put on the car...someday.
