Hastech rockers

[JoeMag]

Anyone have an experience using these?

[colingreene]

Looks like LN sells them.
whats your goal here?

[JoeMag]

Yes, I see you can buy them...

Looking for experience from anyone on their quality, characteristics, and functionality.

Did a little picture cut&paste comparison... left std rocker, center pauter, right hastech. Noticed the angle of foot on hastech is different.

[stownsen914]

Could that pic be cropped? It would be a little strange to mess with geometry on a replacement rocker, as it would change cam timing events.

[JoeMag]

No manipulation... I took these two pics, did a little manipution of mirroring one and making sizes match, then cut the section out and saved.

I'm not sure it would change the ratio, would need to do some measurement center line of rocker bore, pad, and foot. ...I kinda like the reduced angle as when you're at max lift the angle of the adj screw is more "in line" with the valve stem, however, porsche picked that angle for a reason.

[mikedsilva]

Originally Posted by JoeMag

Yes, I see you can buy them...

Looking for experience from anyone on their quality, characteristics, and functionality.

Did a little picture cut&paste comparison... left std rocker, center pauter, right hastech. Noticed the angle of foot on hastech is different.

the alignment of the pad of the third rocker, is not the same as the first two. I would suggest the rockers are all the same .

[stownsen914]

The contact pad on the Hastech rocker looks a little longer than the other rockers, but the curvature looks pretty similar. Changing curvature within the contact range would affect rocker lift. So not change the critical cam timing events (I misspoke in my earlier post), but it would cause lift to be different than a stock rocker.

[colingreene]

No I am asking what are you doing that you need these rockers?

[JoeMag]

High lift cams where start to run off the lower side (as shown in above pic) of the pad at max lift.

[Classic 911]

Interesting.


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[safe]

They specialize in FIA approved RSR engines etc, so I would guess that the rockers isn't "trick" but follows what is legal in historic racing.

[Dpmulvan]

Originally Posted by JoeMag

No manipulation... I took these two pics, did a little manipution of mirroring one and making sizes match, then cut the section out and saved.

I'm not sure it would change the ratio, would need to do some measurement center line of rocker bore, pad, and foot. ...I kinda like the reduced angle as when you're at max lift the angle of the adj screw is more "in line" with the valve stem, however, porsche picked that angle for a reason.

Clearly the top pic rockers are far out of alignment with each other. Rocker on left you can see a lot of the inside top right of bushing opposite for left.

[Dpmulvan]

Got em backwards but you know what I mean