Stock Chevy rod question - Team Camaro Tech
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post #1 of 9 (permalink) Old Feb 15th, 10, 02:07 AM Thread Starter
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Stock Chevy rod question

Are these rods ok to use in a stock DZ rebuild? I recently installed a set in my engine that were re-conditioned. They measured around 9/16 across the beam. Speed shop I bought them from said they were comparable to the O rods, but haven't seen much info on them and no one seems to know much when asked about them.

http://cgi.ebay.com/ebaymotors/350-5.7--CHEVY--X-RODS-(set-of-8)-SHOT-PEENED_W0QQitemZ250578334850QQcmdZViewItemQQimsxZ2 0100212?IMSfp=TL100212123016r13734

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post #2 of 9 (permalink) Old Feb 15th, 10, 10:14 AM
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Re: Stock Chevy rod question

Well, I would be hesitant to buy ANY lower end parts used. The description says they have not been resized. I take this to mean they need resizing. If no one knows much about them there is a good reason.They are unknown. I would not buy them even at that cheap a price. They could be bent. How about the bolts? What condition are they in? Floating or pressed? "Appear to be in good condition" covers a lot of territory.
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post #3 of 9 (permalink) Old Feb 15th, 10, 10:43 AM
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Re: Stock Chevy rod question

When I think of DZ rebuilds I always get the feeling the owner is going to buzz the thing at least once in a while.

You can get some better rods for your application that don't cost a lot of money.

With used rods you have no idea how much they have been used and in what application. Might have been in granny's grocery getter or might have taken some nitrous hits.

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post #4 of 9 (permalink) Old Feb 15th, 10, 11:41 AM Thread Starter
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Re: Stock Chevy rod question

Not planning on buying those rods, already have a set of X's that have been gone over and reconditioned, etc. with ARP bolts. Someone told me years ago to make sure the beam measurement was no less then 9/16" which they are. I don't believe the ones I have are the newer Chevy PM rods. It does seem there isn't much info on the X rods though, mostly that they were installed in heavy truck engines and were used in some form of racing in the 70's and 80's. I googled and found SOME info but not enough to convince me to use or not use. I don't plan on installing engine anytime soon and won't until I hear more opinions.


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post #5 of 9 (permalink) Old Feb 15th, 10, 01:08 PM
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Re: Stock Chevy rod question

If this for a real DZ motor and a real Z28.save your money and buy some good rods.I was going to buy a set of Scat pro comp rods,CNC motor sports has them for about $250.but I snaged a set of Manley H-beam rods cheap from CNC.you dont want cheap rods or pistons in motor like that.what are going to do for pistons?
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post #6 of 9 (permalink) Old Feb 15th, 10, 01:53 PM Thread Starter
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Re: Stock Chevy rod question

After thinking about it for a while in 1975 I had my first Camaro, a 69 SS 350/300 3 speed early car, I remember it had the narrow rear spoiler on it. I pulled the engine apart and if I'm not mistaken it had X rods in it. I believe it was the first time I saw the inside of a chevy engine and the crank was forged and the block had 4 bolt mains if my memory serves me right.

I had a set of these rods reconditioned, ARP bolts, all weighing the same, using pressed in pins instead of floating, new .030 12.5's cut down to 11's all weighing the same, crank is standard and everything was balanced together. Short block is already together.

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post #7 of 9 (permalink) Old Feb 15th, 10, 01:57 PM
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Re: Stock Chevy rod question

Those are not the rods he is going to buy, he's said that he bought a similar set and has since had them resized and switched to ARP bolts.

Honestly, for a stock 302 build, I'd say they are fine. Make sure the engine gets balanced and go have fun. If you were going to buy rods, I'd recommend the powder metal ones for a limited budget or a set of scat/eagle aftermarket ones if you don't mind paying for extra security.

The main issue with used rods is that the "clock" on them doesn't get reset when they get reconditioned like it does with most other engine parts. But generally, you'd be fine unless these particular rods have swung in two or three builds and are at the end of their road.
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post #8 of 9 (permalink) Old Feb 15th, 10, 03:30 PM Thread Starter
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Re: Stock Chevy rod question

Quote:
Originally Posted by 69duskblueX33 View Post
Those are not the rods he is going to buy, he's said that he bought a similar set and has since had them resized and switched to ARP bolts.

Honestly, for a stock 302 build, I'd say they are fine. Make sure the engine gets balanced and go have fun. If you were going to buy rods, I'd recommend the powder metal ones for a limited budget or a set of scat/eagle aftermarket ones if you don't mind paying for extra security.

The main issue with used rods is that the "clock" on them doesn't get reset when they get reconditioned like it does with most other engine parts. But generally, you'd be fine unless these particular rods have swung in two or three builds and are at the end of their road.

Yes..I had everything balanced, crank, rods and pistons when the block was machined years ago. The short block is loaded on my engine stand just waiting for me to do something with it. I'm not in a hurry. I need to pick up some good head gaskets now. Any suggestions? Block has not been decked and is at .030 overbore.


I'm currently running a 1974 2 bolt 355 with 11's all balanced as well with the 30-30 cam, my 186 heads, Z intake, and S/R 4053. Runs well on pump gas with 4:10's and M20

On the X rods...don't get me wrong , I personally think they should be fine as well. I just haven't heard very much about them. I have heard them used in the same sentence as being comparable to the O rods. Also the gentleman I bought them from runs a small million dollar a year or so engine building service in Dover Delaware, Rose Engines, Paul Rose is his name. Probably the best chevy engine man in my area. We have been long time friends since we were stationed at Dover AFB working on C5-A's in the 70's. He wouldn't steer me wrong. I did call him today to be sure and he says they will be fine and not to worry. He also said he starts with virgin rods.

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post #9 of 9 (permalink) Old Mar 5th, 10, 06:12 PM Thread Starter
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Re: Stock Chevy rod question

Check out this auction. and look at the pics, especially the rod caps. There are the X rods I have been talking about. This would be a period correct CE right? or too late?

http://cgi.ebay.com/ebaymotors/69-70...Q5fAccessories

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