resizing rods
Thread Starter
11 Second Club
Joined: Feb 2003
Posts: 523
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From: WESLACO, TEXAS
resizing rods I have searched quite a bit with no major decisions reached as far as replacing my stock connecting rod bolts with ARP's but, i was wondering who has resized there rods when doing this and who hasn't, and those of you who haven't, how has it been holding up? any special machining? or work needed to be done with the arp pro series and or the arp high-performance series.
Eddie
Eddie
TECH Apprentice
Joined: Aug 2004
Posts: 321
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From: Buffalo, N.Y.
As far as I know, LS-series engines that use the cracked-cap con rod design CANNOT be resized. Replacing the bolts shouldn't be a problem, but remember, you CANNOT use the OEM torque to yield specs (15 ft-lbs 1st pass, then an additional 60 degrees) with aftermarket (ARP, etc.) bolts.
rod resize, bolt swap The rods can be resized with special .002" oversize outside diameter bearings. Problem is there are no std. size bearings, only .010 under from what I can find. Unless someone makes a std bearing there is not much you can do with your rods if they are out of round.
If I were doing this I would install the new bolts, torque to spec in a rod vise and then check the big ends for out of round. If out of spec, replace the rod. Of course, the rods have to be out of the engine to do this checking.
If I were doing this I would install the new bolts, torque to spec in a rod vise and then check the big ends for out of round. If out of spec, replace the rod. Of course, the rods have to be out of the engine to do this checking.
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Thread Starter
11 Second Club
Joined: Feb 2003
Posts: 523
Likes: 0
From: WESLACO, TEXAS
Originally Posted by Steve - Race Eng
The rods can be resized with special .002" oversize outside diameter bearings. Problem is there are no std. size bearings, only .010 under from what I can find. Unless someone makes a std bearing there is not much you can do with your rods if they are out of round.
If I were doing this I would install the new bolts, torque to spec in a rod vise and then check the big ends for out of round. If out of spec, replace the rod. Of course, the rods have to be out of the engine to do this checking.
If I were doing this I would install the new bolts, torque to spec in a rod vise and then check the big ends for out of round. If out of spec, replace the rod. Of course, the rods have to be out of the engine to do this checking.
I was planning on taking my car to san antonio for the shootout and i really don't want to tear down the whole enging just to replace the rod bolts, have you ever had any problems with them being out of round even after following the arp tq. sequences?
Launching!
Joined: Jul 2005
Posts: 211
Likes: 1
From: Guatemala City.
dont worry, replace all with arp...
thet resizing thing is because "they" still think about old school gen II, I V-8 where the rod had to be resized because not strong enough to hold good bolts, also the bolts somewhat served as aligning dowels (hence the wave lock metod of ARP).
this is not nesesary with a craked rod since the crack itself is the "aligning feature" of the two parts.
(I said ARP, because I used that but feel free to put anything exept the asparragus made OEM crap! )
thet resizing thing is because "they" still think about old school gen II, I V-8 where the rod had to be resized because not strong enough to hold good bolts, also the bolts somewhat served as aligning dowels (hence the wave lock metod of ARP).
this is not nesesary with a craked rod since the crack itself is the "aligning feature" of the two parts.
(I said ARP, because I used that but feel free to put anything exept the asparragus made OEM crap! )
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