polishing rods

If I were to polish the rods on my 2.5 would I have to get the rotating assembly balanced? how much can the stock 2.5 rods handle?

[GLHS0658]

Yes you would have to get the rods balanced at the minimum.
The pistons are easily balanced. By design the crank is self balancing ( 2 opposed rod journals), that is not to say that it is balanced. It's close. Polished AND shot peened rods WITH ARP bolts should be done. But you should get the assembly balanced. It is money NOT wasted.

I don't know the horsepower limit

[crazy1eye]

Yes, have the rods balanced/weighed for sure. As long as there within a few grams of each other, no problem.

[TheGinMill]

Quote:

Originally posted by GLHS0658 rods WITH ARP bolts should be done.

I have heared that you shouldnt use ARP rod bolts on the 2.5, they are weak. And that was from Gary Donovan.

[cawcislo]

If ARP are weak than what about stock bolts? Now I'm just curious if Gary actually said they are weak. I know he head one let go in Relentless, but are they weak or was it just a defective one???

[glhsken]

Quote:

Originally posted by gin8122 I have heared that you shouldnt use ARP rod bolts on the 2.5, they are weak. And that was from Gary Donovan.

He never said that...

[Aries_Turbo]

yeah i second ken... he didnt say they were weak... he said "offending fastener" whether that means defective (i think) or whatnot i dunno...

Brian

dont spread rumors that the fasteners are weak as arp makes a good product but occasionally something fails as with all products... nothing is 100%

[TheGinMill]

Quote:

Originally posted by Aries_Turbo yeah i second ken... he didnt say they were weak... he said "offending fastener" whether that means defective (i think) or whatnot i dunno... Brian dont spread rumors that the fasteners are weak as arp makes a good product but occasionally something fails as with all products... nothing is 100%

I aint spreading rumors here, as I have used ARP fasteners exclusevely for over 15 years. All my SBCs get head, main, and rod bolts from them. I just read/heared that for the turbo dodge's the mopar performance stuff is the better bet.

Trust me, I would feel MUCH safer if there were ARP fasteners in there, but I am a newb with these engines.

BTW, my engine is at the machine shop now, Id love some more input on this, as I will be ordering my parts very soon.

M

[Aries_Turbo]

i realize that you werent spreading it but asking a question.... it is annoying though when someone spreads rumors as fact and changes many peoples view on parts to use. as far as fasteners go.... MP headbolts are nice pieces. i dunno if arp studs are needed. id ask around on that. the arp rod bolts are a nice piece and are easy to get as they are the same as 318-340-360 rod bolts im pretty sure. main studs..... i dunno which ones to get and if arp makes a set for the commonblock motors... i know they make them for the older ones. from what i hear (not fact...) the stock ones are plenty. someone correct me if im wrong. as far as garys failure..... on a 300hp motor they would have been fine prolly forever.... however he was making 444whp....

Brian

[glhsken]

Go ARP for the bottom end... If they weren't O.K. Gary never would have sold them to me AFTER the bottom end failure.

BTW, There are ARP 180,000 ft lbs tensile strength

AND there are ARP wavelock... 220,000 ft lb tensile strength.. I went with these.

All Gary said was that it was a bolt failure. $hit happens..

GIN, you might not have said it, but you implied someone else said it without knowing...

[Aries_Turbo]

hey Ken,

Is ARP available for the majority of the bolts/studs in the motor?
More specifically is there a mopar 2.2 2.5 specific set of arp head studs/bolts and/or main cap studs/bolts (boy that was alot of "/'s" hehehehe) thanks

Brian

PS. btw i have ARP rod bolts and im not fearing failure with them.

[glhsken]

YES, I'm going with main studs and rod bolts (wavelock) from them.. the head is staying mp bolts.

[TheGinMill]

Where are you all getting the main and rod bolts? I am having some issues with finding them anywhere. I planned on going with head bolts from Mopar, but the botom end, I wanted to go ARP.

BTW, turbonetics hook up worked I am keeping my .82 exahust housing and stage IV wheel, but they are hooking me with the back plate, housing and wheel, for a T4 60-1 hifi. so sweet. Angry minivan cometh :big grin:

[turbovanman]

I am using ARP head studs, awesome and no stupid torque angle crap and no bolt stretching. Also using ARP rod bolts, they are the same as the premagnum small block, 340-360. The part # is 144-6001.