Quickin

I mean, what is taking place inside to make more?

Also, what else needs to be changed, or can you just do a cam?

The Guy in MY 99TA

I know they are better b/c valve float isn't an option with the solid roller set up. But I think the lobes on any roller cams are more bulkey(wider on the sides and don't come to as much of a tip). But the difference off a solid roller and a hydraulic roller I'm not sure about.

Josh S.

jrp

iTrader: (16)

hydraulic cam: a cam using lifters that has a valve-controlled plunger inside its body, preloading the pushrod at the closed valve position through oil pressure lift: distance the valve is depressed from its seat when closed to the peak valve lift when open fully

mechanical (solid) cam: a cam using lifters with only a radiused contact face in which the pushrod end sits without internal valves or other complexity; requires periodic lash setting

racer7088

You get the valve open quicker and usually higher so the valvetrain intensity is much higher. You do not have all the seat timing also causing exhaust and intake reversion that you do on a hydraulic cam.

Quickin

So, with my 436 stroker for instance, how much RWHP and RWTQ would I pick by JUST changing to a solid roller and nothing else?

(and of course whatever parts that need to go with the solid roller)

Quickin

what??????

strokedls1

iTrader: (1)

Parts needed: adjustable rockers, lifters, pushrods, springs, retainers, locks and cam
Postives- Ability to run more lift, duration and rpm = more power
Negatives- have to be adjusted regularly, high spring pressure can crack valve seats, shorter interval to change springs and overall cost

Usually lsX people use this on primarily race cars to get max power when drivability is not a concern.

racer7088

Well that's fairly hard to tell because it depends on what kind of cams you/re comparing and how aggressive or mild they are in the first place. The larger you go the more the solid can gain. On a 224 Hyd. VS solid roller I wouldn't expect to see as much difference but on a 244 there would be more (maybe 10-20) and on a 264 there woudl be a substantial amount (maybe 15-30) since you are starting to add extremely crazy seat timing on the hydraulic. The Solid roller will have maybe 40 degrees +/- some depending on the lash.

The solid will pick up the low end and idle vacuum due to this lower seat timing and overlap 99 per cent of the time.