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OEM rod bolts: are they good? Or is ARP superior?
#1163628
01/23/12 07:51 PM
01/23/12 07:51 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
OP
EL Master
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OP
EL Master
Joined: Jan 2003
Posts: 9,670
Lima, Peru
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I was wondering hows the quality of the bolts on a ser of lets say NOS LY rods.
I have NOS set of LY rods and I was wondering about the quality of the bolts that came on those from the factory. Are they good bolts? Comprable to something you can get from ARP nowadays?
How would those NOS rods with NOS bolts live in an old school street performace stock stroke 440 build?
Last edited by domingo; 01/23/12 07:51 PM.
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Re: OEM rod bolts: are they good? Or is ARP superior?
[Re: domingo]
#1163629
01/23/12 08:10 PM
01/23/12 08:10 PM
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Joined: Mar 2007
Posts: 3,285
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,285
West Coast, USA
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There is no comparison between the two types. The stock rod bolts are the weak link in the rod.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: OEM rod bolts: are they good? Or is ARP superior?
[Re: jbc426]
#1163630
01/23/12 08:59 PM
01/23/12 08:59 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
OP
EL Master
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OP
EL Master
Joined: Jan 2003
Posts: 9,670
Lima, Peru
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I was thinking the OEM bolts were OK, and that people just swapped em because they are no good to reuse and I guess you can get Ma Mopar OEM rod bolts anymore brand new. After all, those were the rod bolts that came on 440-6 and HEMI cars, right? Or did people back in the day when they raced the Max Wedges, race HEMIs, 440.6 A 12 package cars, etc changed the rod bolts over to ARPs or similar before they went out racing? 
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Re: OEM rod bolts: are they good? Or is ARP superior?
[Re: d-150]
#1163632
01/23/12 10:29 PM
01/23/12 10:29 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
OP
EL Master
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OP
EL Master
Joined: Jan 2003
Posts: 9,670
Lima, Peru
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its 50 on the one im using.... I am inclined to toss these rods and use a NOS set of LYs I have here....but I was thinking of leaving the NOS rod bolts on and not bothering with the ARPs. This is weirds I have used ARPs on stock rods on toher builds and never had this happen- 
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Re: OEM rod bolts: are they good? Or is ARP superior?
[Re: domingo]
#1163634
01/24/12 01:21 AM
01/24/12 01:21 AM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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Quote:
After all, those were the rod bolts that came on 440-6 and HEMI cars, right?
Or did people back in the day when they raced the Max Wedges, race HEMIs, 440.6 A 12 package cars, etc changed the rod bolts over to ARPs or similar before they went out racing?
Bad example except for the hemi rod which had a larger rod bolt.
The 6pk rod came about because the 69 A12 had problems breaking rods , the 6pk rod design was good till whomever designed it DROPPED THE BALL and left the 3/8 rod bolts in them instead of upsizing to 7/16 bolts like the Hemi rods had.
The stock rod bolts will be fine for a grocery getter with a 318 ...
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