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Forum: L78/L89 specific Forum 07-31-2023, 02:45 AM
Replies: 24
Views: 3,769
Posted By big gear head
I guess when they stopped using the short water...

I guess when they stopped using the short water pump they no longer used cast iron pulleys. As far as I know all of the pulleys for the long water pump were steel.
Forum: L78/L89 specific Forum 07-28-2023, 03:31 PM
Replies: 24
Views: 3,769
Posted By big gear head
I've been running standard pulleys up to 7200 RPM...

I've been running standard pulleys up to 7200 RPM without any problems. As long as your brackets are sturdy and the pulleys are lined up correctly you shouldn't have any problems.
Forum: L78/L89 specific Forum 07-13-2023, 03:03 AM
Replies: 24
Views: 3,769
Posted By big gear head
Well you all scared me enough to do something...

Well you all scared me enough to do something about it.
Forum: L78/L89 specific Forum 07-10-2023, 07:54 PM
Replies: 24
Views: 3,769
Posted By big gear head
I didn't know you were talking about a cast...

I didn't know you were talking about a cast pulley. Maybe you could use a billet aluminum pulley and paint it cast iron gray. Mine is stamped steel. I have access to lots of CNC equipment so I might...
Forum: L78/L89 specific Forum 07-10-2023, 04:59 PM
Replies: 24
Views: 3,769
Posted By big gear head
What about putting a reinforcement plate inside...

What about putting a reinforcement plate inside the pulley? Would that prevent it from cracking? I'm using a standard groove original GM pulley on mine and shifting gears at 7200 RPM. Now I'm...
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