Wnts2Go10O

iTrader: (12)

secondly, what source for stock rod bolts?

i would like some sort of upgrade for the rod bolts on my motor but really trying to keep the cost down. everything says id need to resize the rods for the arp-pro bolts. ive seen conflicting info on the lower grade arp bolts. if one was to say the katech bolts, id be better off buying stock length aftermarket rods.

ideas?

maybe a stronger stock bolt?

85MikeTPI

iTrader: (9)

You have it covered. Like you said, while putting new bearings in I ended up with scat ls1 rods instead of doing upgraded bolts, resizing cracked rods and bearing sizing for proper clearance... Some said the Arps would be fine, but I tend not to trust Internet logic... Ymmv

Wnts2Go10O

iTrader: (12)

thts the problem

to make things worse. the nexxt step up from the stock bolts is only 11 dollars

3pedals

iTrader: (3)

I installed ARP2000's in my LY6 without re-sizing, so far it has survived about a dozen dyno pulls, but not in car operation. Tf they become a problem I will drop the coin on rods and Pistons

Wnts2Go10O

iTrader: (12)

im putting a rebuild together. cant do the "one at a time" method.

Pumba

Katech makes a very good direct replacement connecting rod bolt:

http://store.katechengines.com/conne...bolts-p25.aspx


Call Katech and talk to Jason.

-

85MikeTPI

iTrader: (9)

Guess reading comprehension is a dying art...

3pedals

iTrader: (3)

well then just install whichever new bolts you intend on running and take the rods to the machine shop and have them checked. pretty easy if you have it all apart. if they are way out then you have some decisions to make

Prorac1

iTrader: (4)

I installed ARP 8740 bolts in my GEN 4 rods. We took them to the machine shop and checked the big end before and after. With the stock bolts, and with the ARPs. The big end was WELL within GM specs with the factory bolts.......as expected. It was not oblonged with the ARP bolts, but the big end had opened up a little bit, but it would have worked. I still resized the rods and am using .002 oversized bearings. Now in my case it would have been ok, but the motor was apart anyways, but what about the guy who put the bolts in and the rods end up a little on the TIGHT side. That would cause a problem. Theres my findings. JMHO. Eric L

bww3588

iTrader: (49)

After I installed arp 8740's, my stock rods were .003 O-o-R

redtan

iTrader: (5)

How is spending $200 for a simple rod bolt and install vs. $600 rods and completely taking all the internals out the same?

chrisfrost

iTrader: (8)

I'm gonna go not very far out on a limb here and say that IMO probably at least some of the guys that have installed ARP sportsman bolts or 1 of the higher grade ARP bolts and have not resized and have been alright have either A. not torqued their bolts to the proper TQ to stretch their bolts resulting in somewhere around the same amount of clamping force , thus not adding to the out of roundness which would'nt be ideal because at best that's negating the reason they bought ARP bolts and can lead to rod/bolt failure or B. they simply got lucky . Another thing to note here is the fact that an engine with some miles on it is gonna have rods that are already a little out of round and could benefit from resizing even continuing to use the stock bolts . So You add ARP's bolts and most rods are gonna need to be resized and proper bearings used ,,,,,,,,can You get away without resiz ,,,,,,possibly yes , but possibly no ,,,,for piece of mind ,,,,,,resize . To answer the OP's question ,,,,,,,I can't answer that question .
I've seen I believe the Callies I-beams for $284 somewhere but don't remember Who sells them .

Another point to make is yes the second design factory rod bolts are thicker and stronger than the first design ,,,,,second 1's are kind of modeled after the ARP wave-lock bolts . They also are a little bit shorter than the first des bolts .

-TheBandit-

iTrader: (1)

Did you check beforehand with the stock bolts?

Has anyone measured to see if the rods go out of round with the Katechs? I realize they advertise as not requiring resize, but I'm skeptical given the torque spec is similar to the ARPs.

-TheBandit-

iTrader: (1)

Not to mention having to balance the new rotating assembly.

Wnts2Go10O

iTrader: (12)

i bought the SCAT rods. paid less than 250 for them (26100944P) and they have the ARP bolts on them.

im gonna have new pistons and rings so i was getting a balance anyways. why roll the dice?

people jumping to conclusions

Petraszewsky

iTrader: (28)

There's guys out there that run very high HP motors and ARP rod bolts without resizing....It's more of a CYA for ARP than anything...

Wnts2Go10O

iTrader: (12)

after all the threads i read on it, the 51% consensus was that it was russian roulette with you engine =/