Custom rods for CR bump

[kenikh]

Anybody here ever bump their CR using custom rods? Anybody ever do it to a 2 liter car? It seems to me that in pursuit of higher CR, $1600 for custom Pauter rods is cost competitive w/ JEs cosidering you get to keep the higher quality Mahle pistons.

[ChrisBennet]

Deck height limitations will limit how much you can bump your compression. I wonder how much you can realistically increase the compression using this method.
-Chris

[Henry Schmidt]

Custom rods can be used to increase compression but very little ( deck height limitations) but you also need to consider rod /stroke ratio. The 2.0 has a very good rod length to stroke ratio 1.92 to 1 ( if memory serves me) and any substantial increase in that ratio is detrimental (counter productive).
Increased rod length on all other Porsche 911 based engine is beneficial. When Porsche increased the size of all 911 engines after the 2.2 liter they shortened the rods to try and maintain a specific engine dimension. This rod shortening causes a plethora of problems not the least of which is piston side loading.

[2.7RACER]

A longer rod will reduce the deck height at a cost of $1,600.
Why not machine the spigot face to accomplish the same thing?
Of course my question is "What 2 liter motor"?
The 2L's ran from 8.5 to 9.8 compression ratios.
Reducing deck height is limited by the original specification vs. a safe minimum. Increasing dome volume offers more potential compression increase without the danger involved with very low deck heights.
Discussion of a specific engine type would lead us to a better answer toward increasing the compression and possibly getting more out of a engine.