Thread: rocker arms

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i was jw. the lift on my cam is 0.501 with 1.5 rockers. if i was to use 1.6 rockers would that increase lift?

Yes your lift will be .5344 with the 1.6 rockers.

The math is: (1.6 / 1.5) x .501 =0.5344

Ross, just a head-up for you, if you do this, check for clearance.
Piston to valve
Retainer to guide boss
Rocker slot to stud
Spring coil bind

here is my setup

Vortec heads

bored .40 over 4 bolt block

flat tops, 10.3 compression

comp cams vacu springs or whatever they call them

comp cams 292 h cam flat tappet, 2500-6500 rpm, .501 lift, 292 advertised duration, 244 duration at 0.50, 110 lobe seperation

comps cams valve locks, retainers

studs, guideplates, magnum pushrods

im going to pick up some comp cams roller rockers

should i get the magnum roller rockers or the pro magnums? are the pro magnums that much better? also should i get 1.5 or 1.6? thanks

Originally posted by Ross
here is my setup

Vortec heads

bored .40 over 4 bolt block

flat tops, 10.3 compression

comp cams vacu springs or whatever they call them

comp cams 292 h cam flat tappet, 2500-6500 rpm, .501 lift, 292 advertised duration, 244 duration at 0.50, 110 lobe seperation

comps cams valve locks, retainers

studs, guideplates, magnum pushrods

im going to pick up some comp cams roller rockers

should i get the magnum roller rockers or the pro magnums? are the pro magnums that much better? also should i get 1.5 or 1.6? thanks

The pro-magnums are a full roller rocker,the magnum's have a rollertip.IMO,the magnum's are just fine for what you are doing.The plus with the pro is later on you can run just about any spring with them.The magnum's are limited to 350 open spring pressure.Most Vortec heads are done in the .550 lift area as far as any flow unless they have had large amounts of work done to them.The 1.6 will not only give you .030 approx. more lift but it will make the cam act like it is slightly larger.

Is it 1.5/1.6 X lobe lift ( not valve lift) = . 1.6 x 501=801.6, so it would be 1.6 x .334 =.5344

Originally posted by 49willysSD
Is it 1.5/1.6 X lobe lift ( not valve lift) = . 1.6 x 501=801.6, so it would be 1.6 x .334 =.5344

If you will notice the abbreviation (approx.) that would help.