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melsbluebell
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« on: June 14, 2009, 06:26:23 am » |
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What is everyone's opinion on the use of ARP 2000 5/16 rod bolts over 3/8?
What success or demise have you had with these?
I have always used GB stock rods, never had an all out race application. Turned 8200 rpm's on occasion.
Aren't the 5/16 less diameter than stock?
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Yes its fast and no you cant drive it!
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ProTurboVW
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« Reply #1 on: June 14, 2009, 09:32:54 am » |
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Hey mel I run the CB rods and i am pretty sure they are 5/16. Run the apr2000 in them never had days trouble, had them in my IDA motor and now in my turbo motor. Last time we put the motor together check the pull on the bolts, they where right in spec.
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Mad Pineapple
Junior
 Offline
Posts: 135
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« Reply #2 on: June 14, 2009, 03:35:59 pm » |
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For the small additional cost the 3/8" dia. bolts are far seperior in load and PSI strength, why compromise, it's cheep insurace
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melsbluebell
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« Reply #3 on: June 14, 2009, 09:14:31 pm » |
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arent the 3/8 bolts like 30+$ a piece?
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Yes its fast and no you cant drive it!
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superdrag
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« Reply #4 on: June 15, 2009, 05:44:23 am » |
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No, more like $10 piece, I think I paid $80 for a set plus tax from SCAT. I LOVED torquing them to 50 psi! Stretch was good too.
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Carol's not grungy, she's bitchin'.
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Terry Gaudet
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« Reply #5 on: June 15, 2009, 05:48:26 am » |
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Mel,
If you ask some of the top racers on this site they will tell you that they run 5/16 bolts. 3/8 is better but if you need that big of a bolt you need better rods like Pauter or the like.
Good luck with your racing this summer. Have fun !!!
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Canada - Where men are men and sheep are nervous
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mmccarthy
Junior
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Posts: 179
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« Reply #6 on: June 15, 2009, 07:59:18 am » |
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If you have H beam rods with 5/16 bolts I would definately use them, but if you are purchasing a new set I would look real hard at the SCAT H beams with 3/8 bolts, alot of security for the differance in cost. Go to the ARP website and look at the specs of the bolts. I think I used ARP 625+ bolts in my 5/16 H beam rods,comparable to Carrillo bolts. Mike
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« Last Edit: June 15, 2009, 11:45:48 am by mmccarthy »
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melsbluebell
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« Reply #7 on: June 19, 2009, 05:47:13 pm » |
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My wizard is against using these. I have them bolted and we had to turn a few uptp 28 lbs to get them to stretch the desired 5% stretch. Since this is what I have and what I am going to use am I taking to much of a chance for combo that may turn 8500 and make 235 HP.
What does everyone think?
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Yes its fast and no you cant drive it!
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Ohio Tom (DdK)
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« Reply #8 on: June 20, 2009, 11:28:59 pm » |
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If you are using 2000blots and installing them correctly, the bolt will not fail. The rod will before the bolt does.
3/8" bolts are nice insurance, but they sure do make the case alot thinner when clearancing for big stroke cranks.
The 5/16" bolts allow 86mm stroke easily.
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Ohio Tom Simpson. Home of the Killa' Bee.
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S/P4884
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« Reply #9 on: June 20, 2009, 11:54:38 pm » |
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If your going to run 8500 you'll find the weak link sooner than later!! Why are you turning it to 8500?
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Precision Engineered Performance
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NoBars
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« Reply #10 on: June 24, 2009, 11:52:53 pm » |
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well, he leaves at 8k... gotta go somewhere!
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Anthony Consorte
Richmond, Va.
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Ohio Tom (DdK)
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« Reply #11 on: June 25, 2009, 01:13:57 am » |
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I have run 5/16" bolts in my race motor over 8K for years w/o issues.
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Ohio Tom Simpson. Home of the Killa' Bee.
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