So i know that the roller tip rockers are inferior to full roller rocker design, but how many hp/tq do you think i will see from a 1.6 Comp Cam NSA design?

 

If your going to the hassle you might as well upgrade to full roller rockers. If you go to 1.6 you should highly consider new valve springs as well...

 

Well i have already have the rollertip rockers, springs, guidplates, pushrods, and new studs. I got a good deal on all of them but i was considering selling the roller tip rockers. But how much hp/tq you think it will gain?

 

I have always thought that the roller tips free up more HP than the fulcrum bearings.

 

Full Roller Rocker have the roller tip as well as the roller fulcrum bearing, i thought it would allow less friction compared the the roller tip standard casing

 

You may pick up 5-10 hp with the 1.6 roller tips, mainly from the increased lift.

 

My thoughts are that the biggest benefit is in the trunion and that the roller tip gains would be minimal.

 

I agree. Here's how I look at it:

Work is force times distance. There isn't much distance of motion at the rocker tip, as compared to the fulcrum. Nearly zero, in fact. And, the force is higher at the fulcrum than the tip. So, at the fulcrum, more force x more distance = more work done to overcome friction. So, more power can be saved ('made') by reducing friction at the fulcrum.

 

Yea that makes total sense, yea im guessing in the ballpark of 5-10 rwhp w/ rollertips

 

More distance at the tip, not less????

 

Distance in terms of metal-to-metal sliding, not up/down travel. The sliding distance (friction causing element of motion) is only as long as the contact pattern on the valve tip, or maybe 1/16 inch. Whereas the friction distance at the fulcrum is the radius of the fulcrum bearing surface x the angle of rotation of the rocker.

 

I would say 10 was generous.

 

Im going to see if I could use my friends dyno jet so I could do a before/after and see how much of a difference rollertips are over stockers

 

Yup.