All Things Mk5 > Performance Modifications

Con rod debate

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jimk04:
So in the 1.8T 20v circles it seems that the con rods are changed fairly readily - even the 'BAM/APX' forged jobs from the later 225hp engines. I personally know of quite a few whom have bent rods or ejected them through the side of the block.

But the mk5 setup doesnt seem to bother....yet I think the mk5 GTI only has 19mm wrist pins....smaller than a 225 1.8t.

I know a lot is down to the torque delivery and driving style, but it seems surprising that I have heard of no major failures of bottom ends - despite quite a few high power cars.

Are the TFSI rods still 144mm? Just stroked to 2litre with the crank?

jimk04:
Interesting so far! :grin:

vRSAlex:
GTi has 20mm wrist pins and the ED30 has 21mm pins.

Visually between the two standard rods they are the same.

I have seen a few failures.  Usually just bent rods but a couple of rods out the side failures too.

The rods are indeed 144mm and the 2 litre is obtained through a larger bore of 82.5 and a different stroked crank.

jimk04:
I have some spare 225tt mk1 forged conrods as I put Integrated Engineering in. Are these interchangeable with the TFSI? I know there was a change on the later 1.8Ts  due to the intermediate shaft change..

vRSAlex:

--- Quote from: jimk04 on February 28, 2012, 07:48:02 pm ---I have some spare 225tt mk1 forged conrods as I put Integrated Engineering in. Are these interchangeable with the TFSI? I know there was a change on the later 1.8Ts  due to the intermediate shaft change..

--- End quote ---

Standard bam rods? They are different to the standard GTi rods at the little ends. The GTi's little end tapers to allow it to fit into the piston.

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