Gun drilled AAH cams...
06-07-2004, 09:10 PM
#11
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weight is the giveaway. But all Audi cams are forged. Schricks are too...
as are BMW/Mercedes. Very few domestic manufacturers use forged castings. Japanese/English is spotty. Many domestic manufacturers are just now getting around to forged cranks.
Cylinder head shops will usually contract this stuff out for you or you can look in the YP's under metal then heat treating, processing, plating, electro-plating, annealing and anodizing.
Cylinder head shops will usually contract this stuff out for you or you can look in the YP's under metal then heat treating, processing, plating, electro-plating, annealing and anodizing.
06-08-2004, 02:50 AM
#13
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I doubt you have any problems w/ it's strength or lifespan
I equate it to the old experiment that Mr. Wizard used a long time ago: A solid tube bends easier than a hollow one.
Basically, he took two steel cylinders (one hollow, the other solid obviously) that were identical in composition, length, & diameter. Then he supported each end of the rods, & suspended weights via a cable on the center of each rod. The hollow rod suspended more weight than the solid one before bending.
He basically explained it (the way I perceived it anyway) to where the pressure was distributed around the perimeter of the hollow pipe(like an eggshell when you squeeze it in the palm of your hand). Whereas the solid rod fatigued faster f/ heat & pressure due to concentrated stress in a more confined location, & less efficient weight distribution. I hope no one is confused by my writing.
Obviously, you have to have a decent amount of wall thickness for this to prove true. I don't think anyone would believe that a 1/4" copper pipe would handle more stress than a 1" solid copper cylinder.
But of course Mr. Wizard never put rotational forces & tried overcoming valve springs at different locations on the pipe either.
I may be way off comparing this to a camshaft, but I think I'm on the right track. Mance, I doubt you 'll have any problem w/ durability since a 9.5mm hole still leaves plenty of wall thickness. Besides, you can always refill it w/ JB Weld since it worked so well on your Porsche's heads ;-P Hopefully, they'll be balanced perfectly too! I dare ya to port your camshaft tower brackets ;-) Just don't crack one like I did when I put it on backwards. I'll shuddup now.
Basically, he took two steel cylinders (one hollow, the other solid obviously) that were identical in composition, length, & diameter. Then he supported each end of the rods, & suspended weights via a cable on the center of each rod. The hollow rod suspended more weight than the solid one before bending.
He basically explained it (the way I perceived it anyway) to where the pressure was distributed around the perimeter of the hollow pipe(like an eggshell when you squeeze it in the palm of your hand). Whereas the solid rod fatigued faster f/ heat & pressure due to concentrated stress in a more confined location, & less efficient weight distribution. I hope no one is confused by my writing.
Obviously, you have to have a decent amount of wall thickness for this to prove true. I don't think anyone would believe that a 1/4" copper pipe would handle more stress than a 1" solid copper cylinder.
But of course Mr. Wizard never put rotational forces & tried overcoming valve springs at different locations on the pipe either.
I may be way off comparing this to a camshaft, but I think I'm on the right track. Mance, I doubt you 'll have any problem w/ durability since a 9.5mm hole still leaves plenty of wall thickness. Besides, you can always refill it w/ JB Weld since it worked so well on your Porsche's heads ;-P Hopefully, they'll be balanced perfectly too! I dare ya to port your camshaft tower brackets ;-) Just don't crack one like I did when I put it on backwards. I'll shuddup now.
06-08-2004, 03:08 AM
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Hey, I've got an eletro-plating machine
that I used to plate gold , black pearl, & chrome with. I've only used it like 10 times. It has polarity reversal too (prevents burning the object you're plating). I'd be willing to let go of it to someone that wants it for a fraction of the original cost because I really need the money right now.
06-08-2004, 04:10 AM
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Re: Mhmm...
Dimensions are 6.75" X 6.25" X 2.25".
Power: uses 12vdc; comes w/ rechargable battery (12vdc, 12.0 amp hour), or can be hooked up directly to a car battery.
It's a brush plating system, & I've got all the hardware except for the waste pan (oil drain pan works great though) & bonnets for the anodes. I don't have any chemicals since I couldn't bring them when I moved to SD due to Air Force regulations, but I know where to get all the supplies needed (& chemicals).
Power: uses 12vdc; comes w/ rechargable battery (12vdc, 12.0 amp hour), or can be hooked up directly to a car battery.
It's a brush plating system, & I've got all the hardware except for the waste pan (oil drain pan works great though) & bonnets for the anodes. I don't have any chemicals since I couldn't bring them when I moved to SD due to Air Force regulations, but I know where to get all the supplies needed (& chemicals).
