Installed the raby under-drive pulley

[JFP in PA]

Originally Posted by Jake Raby

a 5/16" (or 8mm) steel dowel inserted through the crank pulley and into the crankcase locking boss does the trick just fine.
I am putting together a kit that includes this improvised tool for the job.

Jake, a quick question: Are you cutting away the boss used to hold the OEM pulley; and if so, how do you hold the new one or lock the engine position for service once the original boss is cut away?

[root_werks]

Seems like a good mod to me.

[Jake Raby]

Originally Posted by JFP in PA

Jake, a quick question: Are you cutting away the boss used to hold the OEM pulley; and if so, how do you hold the new one or lock the engine position for service once the original boss is cut away?

This mod can't be compared to the LWFW. The LWFW won't add steady state tested HP because it only reduces mass. The UD pulley increases HP by slowing down the accessories of the engine.

JFP, the boss extends into the case, so after removing the 12mm necessary for clearance enough of the boss remains to be useful during cam timing and engine maintenance.

[JFP in PA]

Originally Posted by Jake Raby

JFP, the boss extends into the case, so after removing the 12mm necessary for clearance enough of the boss remains to be useful during cam timing and engine maintenance.

Thanks Jake, I've been wondering about that and some customers have been asking about your pulley................

[jhandy]

There really is no tips for this. I used a large Allen wrech with the car
in gear to stop the pulley. There are holes in both pulleys. I would think
there is a special tool like the one for the screw on oil filter adapter that
could be used. But not needed. You need a 15/16 large socket and a breaker
bar. Same size used to lever the belt tentioner. Don't loose the washer.
New bolt is 9$. Tighten to 192 ftlbs.
I did worry about turning the crank too far in either direction as not
to turn motor backwards. I don't know if it matters or not.
This is too simple not to do.

I think the multi tool cutter made this go so fast. Otherwise
cutting the boss looks like a pain in the rear.