Aftermarket con rods?

Therealjj91 · Post by **Therealjj91** » Mon May 11, 2015 7:16 pm

Well this is the story, got the car fully mapped yesterday after the engine rebuild and run in period (2x oil changes) and everything was running really sweet and then it started to knock. Mechanic looked at it today and says it sounds like a small end bearing has gone. I replaced the main bearings with ACL ones but not the small end so that's probably the culprit, the one weak link in the engine :/ but it also has standard con rods with high compression Pistons, do I need aftermarket con rods too? Because I don't want to rebuild it with new small bearings just for a con rod to break....

Post by **4thgenphil** » Mon May 11, 2015 7:25 pm

Standard ones are meant to be fairly strong, I have eagles in mine but my compression is fairly high.

Therealjj91 · Post by **Therealjj91** » Mon May 11, 2015 7:35 pm

What's your compression? I have mahle gold series 11.5:1 pistons and the head has been skimmed slightly as well.

Post by **4thgenphil** » Mon May 11, 2015 7:41 pm

Mahles, flat faced valves, head skimmed the sh1t out of amd the block decked.

I only went eagle as the were cheap to be honest

Therealjj91 · Post by **Therealjj91** » Mon May 11, 2015 7:44 pm

Ah okay fair yeah so you're definetly running higher comp then me

so will mine be okay for the standard rods?

106pete · Post by **106pete** » Mon May 11, 2015 8:16 pm

The hi comp oem pistons need the correct con rods as the small end is a few thou bigger if I remember rightly? Hopefully you have the right bits matched together?

Tbh it's not something I've heard of failing before.

Post by **4thgenphil** » Tue May 12, 2015 7:56 am

Type s/r pistins have floating gudgeon pins as do the mahles where as h22a/h23 have pressed ones

Therealjj91 · Post by **Therealjj91** » Tue May 12, 2015 8:54 am

Yeah I used the pins that came with the mahles and put them onto ATR rods, is that combo okay?

Post by **Merlin** » Tue May 12, 2015 8:57 am

Eagle's here too. I have the Mahle 11.5:1 pistons.