CX racing 3.0 connecting rods

greyes59 · 10-01-2013, 05:45 AM

anybody have experience with using CX racing RSR 3.0 connecting rods?

they are sold in ebay.

KTL · 10-02-2013, 10:30 AM

Made in China. Run.........

No free lunch with those rods. You're better off with original Porsche rods that you've had reconditioned. Just my opinion.

porterdog · 10-03-2013, 03:50 AM

That is not a place to install a component you wonder about.

greyes59 · 10-03-2013, 03:57 AM

thanks !

Schmierung · Schmierung's Garage

I also would like to know if anyone has true experience with these in a Porsche engine?

lvporschepilot · 01-31-2019, 10:00 AM

I have two clients who run these in their track motors every season. I recall one of them acquired a set and a couple of the rods had to be resized out of the box, which Engine Services next to Road Atlanta did. They built the engines on their own, I just tuned/rejetted for them on the dyno. Neither have blown up, both are high revving twin plug units run very hard primarily at VIR and RA. One is a 2.5 or 2.7, the other is I want to say a 3.1L unit. I have never used them, but I know for a fact these two gentleman have and have had no issues.

Folks need to understand, Mahle themselves have it's either 13 or 14 factories......in China. So do Magnetti Marelli. Lots of OEM manufacturers have OEM parts made.....in China. Every company has some presence there for something. If ancillary parts aren't made in China, they're made in Turkey or Poland. The problem I've experienced is Chinese factories are not all equal, but the good ones produce quality that isn't all bad and can even be superior than many EU suppliers. Don't kid yourself, it's not what it was 20 years ago.

Schmierung · Schmierung's Garage

Thank you lvporschepilot. I know many Japanese based engines successfully running these.

You are spot on with Chinese manufacturing. I see this in my professional sector.

KTL · 01-31-2019, 11:32 AM

I totally understand that made in China = garbage is not all-encompassing and there's major corporate industry outsourcing there. But something very small niche like this, you have to be cautious.

Thus, lvporschepilot sort of proves my point. If a set of brand new performance rods needs to be resized right out of the box, that's rather telling. That said, there needs to be context behind how much out of spec were they from center-to-center to warrant the resizing.

Lastly, they're so inexpensive it's nearly impossible NOT to think "if it seems too good to be true, it probably is." Because a set of the basic H-beam rods is $319 w/out bolts and $349 with the bolts included. I'm not one to think you have to spend a ton of money on something just because these are Porsche 911s. But that price is just crazy when you consider they can't be producing a high volume of these rods whatsoever. We're not talking about Chevy LS# (pick a number) rods here!

lvporschepilot · 01-31-2019, 04:54 PM

Chevy LS motors or any number of far higher BHP per cylinder pushrod V8 engines are running rods very similar to these, made by Eagle or the like. Eagle and all manner of other domestic v8 high-po manufacturers have all sorts of stuff like this made in China, from bolt-on ready heads, cranks, rods, pistons. There is even a rumor that Carrillo have a blank made in China that is then machined in the US. Everyone realizes that some 95% of all aftermarket water pumps and pump bearings/seals are all made in China now right? That's how much they've taken over the market or stuff is outsourced, and I am certain most weren't aware. Thanks US labor unions.

And KTL, there is no factory in China that will do a run of just about any auto part that is under about 400, meaning I have no doubt CX racing or whoever had a short run of them made. It's not much, probably around $20-$30 or so a rod. One just has to be willing to shelf them for a while, which Porsche rods will indeed sit for a while so Porsche crowd can groan about them, until they become a fact of life like everyone else made there.

Point is, I truly doubt a 911 engine makes enough power to break one of these forged Chinese rods anyway. Same rule applies with these as goes for iron cylinders, and any good engine build. Measure measure measure, correct if necessary. I can hear the old fuddy duddies groaning now, sweet music.

KTL · 02-01-2019, 08:21 AM

I don't disagree with anything you're saying. You're in manufacturing, i'm not. I'm just speculating with a micron of automotive manufacturing knowledge from a few friends in the industry.

But I still think it's nuts that rods like these come along at a 1/6 of the cost we see for similar rods like Pauter or Carrillo.

I also don't disagree with you about measure measure measure. That said, pretty disheartening that you have to correct something that's brand spanking new and should have been inspected and measured correctly when it was manufactured? And measured with a lot better tool collection than the likes of us DIYers get by with! Another total assumption on my part but I would hope i'm right on that one......

lvporschepilot · 02-01-2019, 09:50 AM

Yeah sucks that some aren’t just right when new, but when a factory is cranking out multiple hundred I’ll take 3-4% with some issues all day.

Tippy · 02-01-2019, 11:16 AM

China has the same capabilities as us in the engineering, machining, and manufacturing departments, it's just it seems they fail at adopting quality control.

I used to be in quality and dealt with Chinese suppliers daily.

Mark Henry · 04:42 AM

As a builder I doubt if they're doing special custom runs of rods. What I would guess is they're buying rough forgings of a rod that's close and having them machined to their specs.
I wouldn't be at all surprised if they're the same rough forgings as SCAT or CB Performance VW rods.
If you were to go this route I'd at least invest in ARP rod bolts.

The 996 3.4 rod is very close to one of the chevy 5.7" rods, so close only the pin size is different.

lvporschepilot · 02-02-2019, 08:51 AM

Depends on the factory. There is such a wide gap in factory quality out there it’s almost impossible to know unless you physically go and check out their operations, or someone is kind enough to tell you who is good, which is usually pretty well-kept information.

Trackrash · Trackrash's Garage

How much do these weigh?

lvporschepilot · 02-02-2019, 12:39 PM

I was told they are some 150g lighter each than stock rods.

Tippy · 02-04-2019, 05:40 AM

Quote:

Originally Posted by lvporschepilot

Depends on the factory. There is such a wide gap in factory quality out there it’s almost impossible to know unless you physically go and check out their operations, or someone is kind enough to tell you who is good, which is usually pretty well-kept information.

True. The more I work around the Chinese, the more I feel comfortable using their stuff; as long as you can verify pedigree.

Schmierung · Schmierung's Garage

As dimensional check by Polo Motors, these are 'spot on'. Penetrant testing to follow.

'76 911S 3.0 · '76 911S 3.0's Garage

Apparently they sell rockers now too...

https://www.cxracing.com/engine-connecting-rods-rockers-crankshaft/RRA-P010-SHAFTx12?sort=p.price&order=ASC

Trackrash · Trackrash's Garage

Quote:

Originally Posted by '76 911S 3.0

Apparently they sell rockers now too...

https://www.cxracing.com/engine-connecting-rods-rockers-crankshaft/RRA-P010-SHAFTx12?sort=p.price&order=ASC

I'm not sure why they are calling these roller rockers, since there is no roller and they have a brass bushing.

Also some of the pics show wear on the contact area.