Im planning on building an ls vtec and was wondering what kind of rpms people are runnning their stock ls rods too. I've heard 9200 with arp rod bolts. Is this pretty acurate informaiton?? any imput would be appreciated.

 

I run B20 rods with stock bolts for well over a year shifting at 9500

 

That is exactly what I run in my daily driver/ race hatch. I have put many miles on the motor and they are perfectly fine to 9200. That is what I shift at when I am at the track and getting on the Freeways somtimes. They hold up just fine.

 

You can get them shotpeened to add some strength, or spend 300.00 for some Eagles . I would imagine with the correct install (clearances, bearings,ect), arp rod bolts, and a crank girdle, stock rods would be ok. I went forged for peace of mind.

 

reliability increases a lot if the bolts where stretched properly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecallmotor &raquo;</TD></TR><TR><TD CLASS="quote">I run B20 rods with stock bolts for well over a year shifting at 9500 </TD></TR></TABLE>

Wow. How often do you shift at 9500? I'm surprised that you haven't spun a rod bearing by now.

 

replace the rod bolts with ARP bolts and use fresh bearings and taking it to 9 wouldnt be a problem if you're taking it that high , i'd recommend a NICE valvetrain upgrade unless you would like some valve float

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by arw321 &raquo;</TD></TR><TR><TD CLASS="quote">

Wow. How often do you shift at 9500? I'm surprised that you haven't spun a rod bearing by now.
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My thoughts exactly! I would shotpeen the rods and use arp bolts, and new bearing for going that high of rpms!

 

i run shotpeened rods and arp bolts up to 9200 or so every once and awhile.

 

i would think that stock rods @9500 would mean trouble , but i have arp bolts on ls rods , and i rev my all motor ls to 8200 and it loves it ....

 

yeah 8K isnt bad, but 9K seems <U>CRAZY</U>! I guess Im not making that kind of pwer yet to find out!

 

It did spin a bearing but I went from 3rd to 2nd in a race. plus it was after a whole alot of abuse. I took the motor apart and the stock rod bolt were not the cause it simple streght a rod.