LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Use stock rods for 355?

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Old 09-13-2011, 11:19 AM
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My 355 is forged rods/pistons with splayed 4 bolt mains with a stock crank...it turns 400rwhp on motor and handles an .88 jet just fine. For your goals, stock rods and crank are fine, upgrade to forged pistons and arp bolts everywhere and you'll be fine a 150 shot.
Old 09-13-2011, 02:20 PM
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Originally Posted by SS RRR
QFT. Anyone will be hard pressed to find an incident where a LT1 rod failed that wasn't caused by something else.


Oh for ***** sake...
A stock crank will take all the power your willing to throw at it but its been proven many times on this board by people taking chances using stock rods in built motors they let go. The best way to go about building a worth while short is using a stock crank and going with a forged rod/piston combo. It will take a heck of alot more abuse then some stock rods with arp bolts. But hey that just my 2 cents do what you want.
Old 09-13-2011, 03:25 PM
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i think the stock rods will be fine, with arp bolts.
Old 09-13-2011, 04:03 PM
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Thanks for all of the great feedback guys. MORE THAN LIKELY I will never hit the car with the juice but theres aloways that "just in case". Really I need to do my whole suspension and rear before I spray it anyways.
I guess its safe to say though if I decide not to spray it, the stock rods will hold fine for what Im doing, basic heads and cam. If I do decide 100% on spraying it though, I think Ill go with some good 6" forged rods.

Once again thanks for keeping it civil, and giving helpful advice. Now I have to decide who I want to do my heads.
Old 09-13-2011, 06:10 PM
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Originally Posted by 95mysticta
A stock crank will take all the power your willing to throw at it but its been proven many times on this board by people taking chances using stock rods in built motors they let go. The best way to go about building a worth while short is using a stock crank and going with a forged rod/piston combo. It will take a heck of alot more abuse then some stock rods with arp bolts. But hey that just my 2 cents do what you want.
For what the OP is doing, stock rods and crank will work fine. Besides, you never know if whatever case you read about on the internet was indeed from a rod failure or some outside influence that caused said failure.
Old 09-13-2011, 06:31 PM
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Im not disagreeing with you and not saying it cant hold it but while your in there and what it costs for a set of rods its definetly worth it for the reassurance IF he ever hit the jug he didnt just waste his money to have to re-do it again.
Old 09-13-2011, 07:46 PM
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It's not.
Old 09-14-2011, 01:24 PM
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Just remember... a tard can blow up an expensive forged rotating assembly with a quickness if he has the tools to make the car kill itself.

that said, i would stick with the stock stuff. arp rod bolts and stock pistons unless you are really going to be leaning on it. if so, i would do a lightweight forged piston. you dont want anything heavy trying to rip the rods apart. get it balanced and call it a day. i would trust the powdered rods over a chinese rod of similar design.
Old 09-14-2011, 02:28 PM
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Once you have a connecting rod failure (or bolt failure?) like me you would definitely be using ALL forged bottom end parts. Take a look at what came out of my old LT1 today....WTF
Attached Thumbnails Use stock rods for 355?-unnamed.jpg  
Old 09-14-2011, 04:01 PM
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Originally Posted by vtec
Just remember... a tard can blow up an expensive forged rotating assembly with a quickness if he has the tools to make the car kill itself.

that said, i would stick with the stock stuff. arp rod bolts and stock pistons unless you are really going to be leaning on it. if so, i would do a lightweight forged piston. you dont want anything heavy trying to rip the rods apart. get it balanced and call it a day. i would trust the powdered rods over a chinese rod of similar design.
What are some lightweight pistons you would recommend? Are the Mahle Powerpacks a heavy piston?
Old 09-14-2011, 05:10 PM
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From what I've read, the cost of resizing and fitting stock rods with ARP bolts is either the same or equal to a decent aftermarket forged I-beam with ARPs already installed in it. I've personally had a stock rod bolt failure, so I'm definately a supporter of getting some good bolts in whatever rod you end up with.
Old 09-14-2011, 05:13 PM
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Im running the Mahle Powerpacks myself and they are a very light piston.
Old 09-14-2011, 05:15 PM
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Originally Posted by ahritchie
Once you have a connecting rod failure (or bolt failure?) like me you would definitely be using ALL forged bottom end parts. Take a look at what came out of my old LT1 today....WTF
So which was it? A rod bolt or rod failure?
Old 09-14-2011, 05:20 PM
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If you are planning on making over 300hp i would go all forged. just for peace of mind. hahahaha
Old 09-14-2011, 05:25 PM
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Originally Posted by SS RRR
So which was it? A rod bolt or rod failure?
Not sure...by the looks of it the rod broke completely in half while the bolt looks one piece. Haven't had time to ask the mechanics opinion, he just texted me a picture of the "problem" a couple hours ago LOL. I'm not taking any chances next time.
Old 09-14-2011, 05:30 PM
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Originally Posted by vtec
If you are planning on making over 300hp i would go all forged. just for peace of mind. hahahaha
Seriously....mine came apart and only made 311 RWHP
Old 09-14-2011, 06:38 PM
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Those results wouldn't be really conclusive to any thing given your power level.
Old 09-14-2011, 07:21 PM
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I used H rods on my previous 355 but I was spraying a dual shot 150..If it's in your budget go this route(link below)...I also wouldn't hesitate using the stock PM rods, they are very durable rods..now pink rods well??
http://www.ellweinengines.com/Ellwei...Kit/355Kit.htm
Old 09-15-2011, 10:31 AM
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Originally Posted by SS RRR
So which was it? A rod bolt or rod failure?
Just confirmed with my mechanic that he believes it was a rod failure, just as it appears in the picture So, to answer the OP's question...NO, don't use stock rods on a 355, whats a couple hundred bucks for insurance it can handle some abuse without snapping rods in half like a twig? Or, just stick with stock ones and risk building your motor twice like me
Old 09-15-2011, 10:42 AM
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Originally Posted by ahritchie
Just confirmed with my mechanic that he believes it was a rod failure, just as it appears in the picture So, to answer the OP's question...NO, don't use stock rods on a 355, whats a couple hundred bucks for insurance it can handle some abuse without snapping rods in half like a twig? Or, just stick with stock ones and risk building your motor twice like me
What was your setup? Pistons, mileage, and was it all properly balanced? What rpms were you spinning to?


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