Engine and Transmission Tech

Greetings Everyone, Has anyone installed harland sharp roller rockers on the stock shafts and pedestals[using the stock springs/spacers spring washers etc? AND any other variation of the harland sharp roller rockers. I have been told stock ratio on them is 1.55 , i had thought the stock factory ratio was 1.60? any comments on how they worked out installation specifics adjustments etc would be much appreciated. i am thinking of using them on my engine build, with my combination i would have to play with the stands or mill the heads and id rather just fit up something as opposed to milling stands or cutting on the heads.

Terry, What motor ?

Rover 4.6 Quess i should have listed that sorry and thanks for reply.

> Has anyone installed harland sharp roller rockers on the stock shafts
> and pedestals [using the stock springs/spacers spring washers etc?]

If you are referring to the Harland Sharp TR8 roller rockers that Ted
at TSI sells:

[www.tsimportedautomotive.com]

you cannot use the stock shaft springs unless you trim them to fit.
The roller rockers are wider than the OEM rockers and the springs will
put too much side force (friction) on the rockers. Two solutions:
trim the springs or make solid spacers (with shim washers). Otherwise
the rockers will work the stock shafts and stands. The rockers have
roller tips and oilite bronze bushings at the shaft. They are, of course,
adjustable so you can set pre-load with hydraulic lifters or lash with
solid. Ted supplies instructions with the rockers. Also, D&D make a set
of end stands to help prevent rockershaft breakage at the unsupported ends.
They are having a set milled for me that are 0.150" deeper in the u-channel
for clearance with the bulkier roller rockers. Once we've verified they
fit, I expect they will show up as a separate part number in their catalog.

> I have been told stock ratio on them is 1.55

Installed on a shaft next to an OEM rocker, I can not tell any difference
in ratio with the naked eye.

> id rather just fit up something as opposed to milling stands or cutting
> on the heads.

You may still need to fit custom length pushrods to get optimum geometry.

Dan Jones