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Old 08-12-2005, 11:08 PM
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ARP Rod bolts - how much better over stock?

How much better are the ARP rod bolts as compared to stock bolts? Will it enable me to turn a stock bottom end 350 to 6000 RPM without worrying? If not, what would be my redline with the stock bottom end with ARP bolts, valvetrain aside? Thanks...

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Old 08-12-2005, 11:10 PM
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6,000 should be safe for the rod bolts. I spun my 5.0 to 7,500 with stock rod bolts.

It all depends on what is the weakest link. Your valvesprings could go first, etc.
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Old 08-13-2005, 07:59 AM
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I agree with the above comments, stock rod bolts are usually not an issue with the SBC. I have never had a problem with stock rod bolts in all the years I have taken SBC's to 6500-7000rpm. But if it will make you feel better then go for it, it can't hurt and it will give you a little more strength. Or it just could cause you to have a little too much confidence in your engine to where you push is a little too far and something else goes.

Vince
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Old 08-13-2005, 08:32 AM
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I have had 3 sbc with ARP bolts and 1 with stock rod bolts that were taken to 6500 rpm on a regular basic. The stock rod bolt 350 lasted about 5000 miles when a rod bolt let go taking out the rotating assembly, block, valvetrain and heads. My previous 400 had ARP rod bolts on stock 400 rods and the bottom cap broke wedging the rod against the bottom of the cylinder wall. I learned my lesson after that and built this 400 with a complete aftermarket assembly to avoid costly mechanical repairs when a factory part fails. You can spend the money now or can you spend a lot more later is my theory.
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Old 08-13-2005, 09:16 AM
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Every engine I have built either SBC or BBC has had ARP rod bolts & main studs... The cost for both ends up being around $100 which to me is cheap insurance...

With BBC`s GM used boron bolts in the higher performance LS series engines... Not sure but with the pink rods but they used different bolts...?

I currently run a 427 BBC which see`s 6500+ RPM (as high as 7K) on a reg basis and with stock rods but everything is ARP...


dat .02 ting...
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Old 08-13-2005, 05:12 PM
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Quote:
Originally Posted by lluciano77
6,000 should be safe for the rod bolts. I spun my 5.0 to 7,500 with stock rod bolts.

It all depends on what is the weakest link. Your valvesprings could go first, etc.
Just out of curiosity, was this a cast crank also? I'm looking to turn a 350 6500-7000 RARELY. It's mostly for cruising on the weekends, track once in a while. I know the 5.0s have a little shorter stroke, but still curious.
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Old 08-14-2005, 03:00 PM
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stroke

Quote:
Originally Posted by radracer43
Just out of curiosity, was this a cast crank also? I'm looking to turn a 350 6500-7000 RARELY. It's mostly for cruising on the weekends, track once in a while. I know the 5.0s have a little shorter stroke, but still curious.
An half inch more stroke is quite a bit more stress at 7000 rpm.
People want to try to save $ 30 and blow up a $$$$$$ engine.
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Old 08-14-2005, 05:45 PM
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Where can I find a forged crank for $30 more than a cast???
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Old 08-14-2005, 06:52 PM
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Think he means the ARP rod bolts...
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Old 08-14-2005, 07:21 PM
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I used Champion rod bolts, which have locking nuts, that torque down to 50lbs on mine.
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Old 08-14-2005, 07:50 PM
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Quote:
Originally Posted by Bumpstick
Think he means the ARP rod bolts...
Well thanks for ruining my hopes of a $30 extra forged crank
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Old 08-14-2005, 10:34 PM
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Rod bolts are cheap insurance, thats the way I look at it.
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Old 08-15-2005, 05:45 AM
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GM sells Boron rod bolts for smallblocks as well as bigblocks, the cost is comparable to ARP. Definately replace the rodbolts IMO. When you replace the bolts the rods will sometimes need to be resized-I say sometimes because I've changed a few sets that didn't need to be resized according to my dial bore guage. Get the torque right during assembly, I usually torque each fastener once then break loosed, torque again then break it loose, then torque it for the third and final time.- This assures the bolt is properly seated and burnishes the threads to make sure the torque readings are accurated.
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Old 08-15-2005, 05:56 AM
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Quote:
Well thanks for ruining my hopes of a $30 extra forged crank

Sorry dood...


Thanks Bob...

You basicly answered a question of mine about bolts for SBC`s... I am still wondering a little are the boron`s for SBC`s used in the "pink" rods or...? thanks...
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Old 08-20-2005, 11:43 AM
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Quote:
Originally Posted by xntrik
An half inch more stroke is quite a bit more stress at 7000 rpm.
People want to try to save $ 30 and blow up a $$$$$$ engine.
NEVER LEAVE HOME WITHOUT THEM......
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