stevieturbo

I originally pinned a stock LS1 crank to my Powerbond pulley.

When I built me 2nd engine, it again used a stock crank, and I was able to redrill the new crank to the same pulley, with the holes in the same position on the pulley.
Both factory cranks drilled out very easily.

This time, I have a new Eagle forged crank, and I need to drill it for pinning to the same powerbond pulley.

I had a quick try, again trying to drill in the same positions on the pulley. However the high speed steel bits I'm using dont seem to be having much of an impact on the crank.

Would I be better just trying to re-drill 2 totally new holes and ignore the existing 1/2 holes in my pulley ?
Any suggestions for the best type of drill bit to be using.

Thanks, Stevie.

cablebandit

iTrader: (37)

i had to take a forged crank out and get it keyed.....it sux but thats what we had to do 3 years ago

stevieturbo

That really isnt an option for me. Havent a clue who would be capable of doing that over here.

Eddiep

iTrader: (26)

High speed steel is great for softer stuff, but I think you might try a different drill bit for this. Carbide, cobalt coated ect. will work a lot better for what you're doing ... you'd be surprised what a difference the right bit makes.