New Big Boy Studs Released...ARP Custom Age 625+
Feb 29, 2012 | 12:49 PM
#1
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New Big Boy Studs Released...ARP Custom Age 625+
I sent a e-mail over to ARP asking about L19's for pre-03 LS engines. My response from ARP.
"Rob,
We are now making them out of CA625 material. It is a superior material and more durable than L19. The part number is 234-4313. L19 is a custom order.
Best regards,
Alan Nichols
Sales & Technical"
These are not listed in the 2011 ARP catalog. My research:
Standard ARP 8740 chromoly Fastener Tensile Strength 190,000-200,000psi (Preload lbs/Clamp force= 13,470lbs)
L19 is 220,000-230,000psi (Preload lbs/Clamp force= 15,060lbs)
Custom Age 625+ is 270,000-280,000psi (Preload lbs/Clamp force not listed on site)
In comparison, 1/2 studs in ARP 8740 are rated at 18,515 Preload lbs/Clamp force.
Other good info. PER ARP installation instructions on LS Engines, 8740 is to be TQ'd to 80lb's. L19 is 90lb's, Custom Age is 100lb's.
Looks like a new option for big boosters looking to stick with a 7/16 stud and be close to the same playing field as the 1/2 stud setups.
Your looking at around $350 give or take for ARP 8740, the best i've found on Custom Age 625 is $750 give or take. I'm not sure what the P/N is for the 04+.
Source for my info:
ARP 8740 for 03 and earlier LS:
http://arpinstructions.com/instructions/234-4316.pdf
ARP2000/L19 ONLY for 04 and newer:
http://arpinstructions.com/instructions/234-4319.pdf
CA625/Custom Age 625 03 and earlier:
http://arpinstructions.com/instructions/234-4313.pdf
Their add is jack up saying 1993 lol, that's a early LS!
"Rob,
We are now making them out of CA625 material. It is a superior material and more durable than L19. The part number is 234-4313. L19 is a custom order.
Best regards,
Alan Nichols
Sales & Technical"
These are not listed in the 2011 ARP catalog. My research:
Standard ARP 8740 chromoly Fastener Tensile Strength 190,000-200,000psi (Preload lbs/Clamp force= 13,470lbs)
L19 is 220,000-230,000psi (Preload lbs/Clamp force= 15,060lbs)
Custom Age 625+ is 270,000-280,000psi (Preload lbs/Clamp force not listed on site)
In comparison, 1/2 studs in ARP 8740 are rated at 18,515 Preload lbs/Clamp force.
Other good info. PER ARP installation instructions on LS Engines, 8740 is to be TQ'd to 80lb's. L19 is 90lb's, Custom Age is 100lb's.
Looks like a new option for big boosters looking to stick with a 7/16 stud and be close to the same playing field as the 1/2 stud setups.
Your looking at around $350 give or take for ARP 8740, the best i've found on Custom Age 625 is $750 give or take. I'm not sure what the P/N is for the 04+.Source for my info:
ARP 8740 for 03 and earlier LS:
http://arpinstructions.com/instructions/234-4316.pdf
ARP2000/L19 ONLY for 04 and newer:
http://arpinstructions.com/instructions/234-4319.pdf
CA625/Custom Age 625 03 and earlier:
http://arpinstructions.com/instructions/234-4313.pdf
Their add is jack up saying 1993 lol, that's a early LS!
Feb 29, 2012 | 01:00 PM
#3
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From: Charleston, SC
Nope:
"These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,000 psi."
"These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,000 psi."
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Mar 1, 2012 | 02:28 AM
#8
Mar 1, 2012 | 02:32 AM
#9
It's 3:31 a.m. Just ingore my bullshit if I've got it backwards.
