[Dragncar]

You would think these guys would get it right. First pic is Rollermasters instructions for their best .005 short timing set with Iwis chain.

Problem, you can not replicate it with the actual chain set. Well the cam gear anyway.
We all know how its done stock, the right edge of the keyway lines up with the center line of the cam gear, marks on both gears and the center line of the crank.
But the drawing on Rollermasters instructions show a gap between the center line and the right edge of the key way. At least as wide as the key way is itself.
It all works if you line it up just like my old Motors manual shows.
Cam comes in at 111.5 on a 112 so its a 1/2 degree advanced, perfect.
But it would be nice if the instructions were correct because you can not replicate it on the car. Tried one tooth each direction, nope.

I even pulled out a new stock style Elgin chain set with Morse chain and lined it all up. Then put the Rollermaster back on. Nothing moved, they matched locations.
But here is the thing. The stock style timing chain is actually tighter than the fancy Rollermaster;s best. Aftermarket I get 3/8" chain deflection.
Elgin/Morse I get 1/4" deflection.
I have Cloyes best .005 short timing set too. Its about the same as the Rollermaster, maybe a tad loser. But I bought the Rollermaster because you can get their short chain set with their top of the line Iwis roller chain. Cloyes only offers their best roller chain with a standard timing set.

And this freaking old Elgin/Morse link type timing chain set I paid 15$ for on E Bay 20 years ago seems to be better than both.

Frustrating.
I think I will end up buying a Milodon gear drive and be done with this stuff on the next engine. I have almost the cost of one in timing chains laying around at this point anyway.

Looks like Cliff is right on this stuff.