Project "Blown HD" my 6/8 drop/shortblock/heads/cam/blower/tranny install
04-07-2007, 10:02 PM
#1251
Originally Posted by Turbolabs
Those pulleys probably have about .005" of press. Meaning the pulley is machined .005" smaller than the shaft. But my guess .0005" of tolerance on the machining would be plenty conservative.
You know a Machinist Mate would have had this thing running weeks ago.
You know a Machinist Mate would have had this thing running weeks ago.
04-07-2007, 10:10 PM
#1252
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It was just a guess. Just from pulling them in the past, they are on there pretty tight. You are right, being a small shaft a .001-.002" may be closer.
I've been out of the machinist business for 6+ years, i'm a little rusty.
I like the name on the quote.
I've been out of the machinist business for 6+ years, i'm a little rusty.
I like the name on the quote.
04-07-2007, 10:11 PM
#1253
... key is that the final bore diameter needs to be something that ATI can live with. I am certain they have their own tolerances for the materials being used. It sure would be nice if the vendors were privy to manufacturing tolerances of the shafts coming from either GM or their foundry. Maybe I'm splitting hairs...
Has anybody been able to confirm whether or not the 3/4 ton power steering pumps are the same as the 1/2 tons? Steering racks are completely different... just wondering out loud if the pumps are different.
FWIW, I have not heard of one single issue with ATI's 8rib power steering pulley on the C5's... solid products for sure.
Bill
Has anybody been able to confirm whether or not the 3/4 ton power steering pumps are the same as the 1/2 tons? Steering racks are completely different... just wondering out loud if the pumps are different.
FWIW, I have not heard of one single issue with ATI's 8rib power steering pulley on the C5's... solid products for sure.
Bill
04-07-2007, 10:33 PM
#1254
Originally Posted by Bill Reid
... key is that the final bore diameter needs to be something that ATI can live with. I am certain they have their own tolerances for the materials being used. It sure would be nice if the vendors were privy to manufacturing tolerances of the shafts coming from either GM or their foundry. Maybe I'm splitting hairs...
Has anybody been able to confirm whether or not the 3/4 ton power steering pumps are the same as the 1/2 tons? Steering racks are completely different... just wondering out loud if the pumps are different.
FWIW, I have not heard of one single issue with ATI's 8rib power steering pulley on the C5's... solid products for sure.
Bill
Has anybody been able to confirm whether or not the 3/4 ton power steering pumps are the same as the 1/2 tons? Steering racks are completely different... just wondering out loud if the pumps are different.
FWIW, I have not heard of one single issue with ATI's 8rib power steering pulley on the C5's... solid products for sure.
Bill
04-08-2007, 01:10 AM
#1257
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Originally Posted by moregrip
using my caliper I measured the shaft OD @ 19mm and the pulley ID @ 18.9mm
And the 18.9mm= 0.744".
You've got .004" press. Approximately............
This is really nice detail on an often overlooked item. Thanks for being so thorough.
Richard
04-08-2007, 09:14 AM
#1258
Originally Posted by Richard@WCCH
Hey Grip. Converting the metric to decimal I use www.onlineconversion.com It says that the 19mm = 0.748".
And the 18.9mm= 0.744".
You've got .004" press. Approximately............
This is really nice detail on an often overlooked item. Thanks for being so thorough.
Richard
And the 18.9mm= 0.744".
You've got .004" press. Approximately............
This is really nice detail on an often overlooked item. Thanks for being so thorough.
Richard
04-09-2007, 07:27 AM
#1260
FYI for anyone wanting to run a 6, 8, 10, 12 rib setup:
Got this email from ATI:
"We do make 8" diameter dampers fairly often. We do stock 7.5", 6, 8, 10, 12 and HTD shells though for LS1 applications. And the 8 - HTD are complete kits of pulleys. Our work with the LS1 engines started a long time ago but I have don a lot of testing on the C5R and C6R engines for Katech, and we were also the stock damper on the ASA Series sealed LS1 engines. Most recently Carl Wegner uses our damper and crankshaft pin kit on the New NASACAR Bush East engines."
Got this email from ATI:
"We do make 8" diameter dampers fairly often. We do stock 7.5", 6, 8, 10, 12 and HTD shells though for LS1 applications. And the 8 - HTD are complete kits of pulleys. Our work with the LS1 engines started a long time ago but I have don a lot of testing on the C5R and C6R engines for Katech, and we were also the stock damper on the ASA Series sealed LS1 engines. Most recently Carl Wegner uses our damper and crankshaft pin kit on the New NASACAR Bush East engines."