New Cam - Resurface Rockers?

[drola]

I am putting some 993 super sport cams on a 993 obd1 motor.
Do I need to get the rockers redone or just slap the cams in and call it a day?
Upon disassembly, everything looks to be in excellent shape.
Also, can the rocker shaft bolts be reused or buy new ones?

[pocv0]

Are you backdating the rockers and ditching the hydraulic lifter? Those SS cams are probably designed for mechanical rockers I would think, not sure. I usually polish the rocker pads with a sanding block with 400 grit, and re-use the bolts, they don't get stretched so you're good.

[drola]

I hadn't planned on backdating the rockers. I compared the cams I"m putting in with the oem cams I took out and aside from the profile they look the same

[targa72e]

I have DRC 993 SS cams in my 3.6. They are designed for mechanical rockers not hydraulic. Rockers should always be resurface when used with new (or different) cams.

john

[Neil Harvey]

Originally Posted by drola

I hadn't planned on backdating the rockers. I compared the cams I"m putting in with the oem cams I took out and aside from the profile they look the same

My advice is to stay with the 993 Rocker arms. Lighter and stronger. Conversion to solid is available.

3 choices of solids. Middle Rocker is modified 993 to solid.

[Neil Harvey]

Also, never use Rocker arms that have had their pad faces reground on a Valve grinding machine.

They may look ok but the wrong radii will be cut and the rocker to cam interface will result in damage.

Ask your cam company if they have the equipment to do this correctly and have them do it.

[drola]

Thanks for the input.
I made the decision to abandon the whole camshaft swap for the time being. I will stick with the stock cams and rockers/lifters for the time being.
I still want to do this in the future as I already have the cams, but time and budget don't work right at this moment.
Since I've already removed the cams from the motor, I need to put them back in their place.
So now my question is - do I time the cams the same way as I planned before? This being using a mechanical rocker set at 0.1mm clearance? And what is the spec for the timing on stock cams?

[drola]

I found the answer. 1.0mm with zero clearance or 1.1 when lash adjusted to .1mm. Which basically is the same thing.

[AndrewRodriguez]

It's usually best to resurface the rockers when installing new cams to ensure proper wear and performance. As for the rocker shaft bolts, it's safer to replace them, but if they're in great shape, reusing them might be okay. I was overwhelmed with my dissertation, so I decided to use https://ukwritings.com/dissertation-services The service was top-notch, and the dissertation I received was very well-written. If you're a student like me who needs help with a dissertation, I highly recommend using this service. The writers were professional, and they made sure everything was perfect before delivering it. I was able to submit my dissertation on time, and I'm very happy with the results.