Drivetrain supercharger pully
4th Gear
Joined: Feb 2004
Posts: 772
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From: Denver, CO
They have a few more names. Cambridge machining? Or maybe Hydromax?
-Brian
5th Gear
Joined: Jun 2005
Posts: 615
Likes: 0
From: Maryland
Just a quick note about our S/C Pulley V 2.0 vs. the original ALTA S/C Pulley (and all of the rip-offs similar to it.)
I hope everyone will visit our new website www.altaminiperformance.com in the next few hours. It will have detail photos etc. of the new pulley as well as a plethora of other items too. But, our new pulley doesn't secure itself in the same press/pinch type method as before. We now incorporate a stainless steel center hub that is pinched to the shaft using two retaining bolts. It also has a centering site hole to allow the installer to verify it is seated prior to installing the outer hub. The outer hub is made from 6061T6 and is secured to the inner hub via three screws.
If this was the earlier type design the use of four or more screws would be required to hold the press/pinch style together. WE completely agree that the use of a pulley with only three screws of the earlier style could create a problem( see CS style advertised above). It is for this reason that our new V 2.0 design center hub can accomodate up to .020" of machining that has occured to the OEM S/C shaft by an ill fitting, improperly tightened pulley. If your previous pulley wobbled, or slipped to any degree it will remove material from the S/C shaft causing the overall diameter to decrease. Our newest design will work on those cars without having to spend a ton of money to install either a new S/C or S/C shaft.
I will be brief here but check out our new website later today for more complete information. (Also, we do not have any of our products made by any other vendors on NAM, etc. We pride ourselves on being a truly independent company and not a re-brand, copycat, company. For any information on when and how parts have been made, PLEASE let me or my staff know directly.)
As always thank you to NAM for the opportunity to discuss these and other products. It is appreciated!
I hope everyone will visit our new website www.altaminiperformance.com in the next few hours. It will have detail photos etc. of the new pulley as well as a plethora of other items too. But, our new pulley doesn't secure itself in the same press/pinch type method as before. We now incorporate a stainless steel center hub that is pinched to the shaft using two retaining bolts. It also has a centering site hole to allow the installer to verify it is seated prior to installing the outer hub. The outer hub is made from 6061T6 and is secured to the inner hub via three screws.
If this was the earlier type design the use of four or more screws would be required to hold the press/pinch style together. WE completely agree that the use of a pulley with only three screws of the earlier style could create a problem( see CS style advertised above). It is for this reason that our new V 2.0 design center hub can accomodate up to .020" of machining that has occured to the OEM S/C shaft by an ill fitting, improperly tightened pulley. If your previous pulley wobbled, or slipped to any degree it will remove material from the S/C shaft causing the overall diameter to decrease. Our newest design will work on those cars without having to spend a ton of money to install either a new S/C or S/C shaft.
I will be brief here but check out our new website later today for more complete information. (Also, we do not have any of our products made by any other vendors on NAM, etc. We pride ourselves on being a truly independent company and not a re-brand, copycat, company. For any information on when and how parts have been made, PLEASE let me or my staff know directly.)
As always thank you to NAM for the opportunity to discuss these and other products. It is appreciated!
Your new pulley looks like a real nice piece.
I do have a question though.It has been said around here, ( not by Alta that I have seen) that using two differing types of metal in pulley construction is a bad thing. Different heat expansion properties, tendency toward corrosion and such.
I myself did not buy into such statements but others have. Since your new pulley is constructed of differing metals, perhaps you would like to comment on this? Or not. Up to you.
Thanks
Former Vendor
Joined: Dec 2002
Posts: 705
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From: Hillsboro, Oregon
ignote: Dave, Thanks for asking. We completely agree with that statement. On any pulley (S/C) that uses our previous design (we now call it Classic) to hold itself onto the S/C shaft must be made of similar materials. This goes beyond the pulley but extends to the shaft as well. Hence the reason why we chose stainless steel on the Classic version. It will expand and contract at the same rate as the S/C shaft. But, if you used a stainless inner hub and an aluminum outer hub, then those will work against each other and can slip and cause damage to the S/C shaft.
The difference on our new (V 2.0) design that we can use dis-similar metals is that the hub is still stainless and works well with the shaft of the S/C, but the aluminum outer section isn't being relied on to hold the inner portion onto the shaft. The inner collar uses a clamp style to hold itself onto the shaft. So the aluminum outside can be used to lighten weight and is simply attached via three screws and lock washers. We feel this is the best of both worlds.
Also, there is more detail on our website at www.altaminiperformance.com and also on our Q&A thread here on nam.
Thanks for asking!
The difference on our new (V 2.0) design that we can use dis-similar metals is that the hub is still stainless and works well with the shaft of the S/C, but the aluminum outer section isn't being relied on to hold the inner portion onto the shaft. The inner collar uses a clamp style to hold itself onto the shaft. So the aluminum outside can be used to lighten weight and is simply attached via three screws and lock washers. We feel this is the best of both worlds.
Also, there is more detail on our website at www.altaminiperformance.com and also on our Q&A thread here on nam.
Thanks for asking!
AltaPerformance, sorry but 2 words: galvanic corrosion. Whether or not your outer shell affects fit to s/c shaft, you still have 2 dissimilar metals. And aluminum/steel combos have been shown to weld themselves together.
Deal with that, and you have a winner.
Deal with that, and you have a winner.
Former Vendor
Joined: Dec 2002
Posts: 705
Likes: 0
From: Hillsboro, Oregon
3cocinas: Thanks for the heads up, but that is strictly the reason why we use an anodized coating on the aluminum section and it is secured with the screws, not a press fit like the competition.
Thanks again NAM!
Thanks again NAM!
Former Vendor
Joined: Apr 2006
Posts: 46
Likes: 0
From: Portland, OR
Differing materials
Your new pulley looks like a real nice piece. I do have a question though.
It has been said around here, ( not by Alta that I have seen) that using two differing types of metal in pulley construction is a bad thing. Different heat expansion properties, tendency toward corrosion and such.
I myself did not buy into such statements but others have. Since your new pulley is constructed of differing metals, perhaps you would like to comment on this? Or not. Up to you.
Thanks
I do have a question though.It has been said around here, ( not by Alta that I have seen) that using two differing types of metal in pulley construction is a bad thing. Different heat expansion properties, tendency toward corrosion and such.
I myself did not buy into such statements but others have. Since your new pulley is constructed of differing metals, perhaps you would like to comment on this? Or not. Up to you.
Thanks
Former Vendor
Joined: Apr 2006
Posts: 46
Likes: 0
From: Portland, OR
Loren
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