Long Rod 2.0L questions

[Super Bleeder!!]

I think the long rod stuff is totally blown out of proportion with respect to results compared to a stock rod motor.

Also, the longer the rod the better the rod ratio gets.

I seem to remember a honda based magazine doing an article on this exact topic. They built up a stock length rod motor and dyno'd it. Then took it apart and changed out the rods/pistons for a long rod setup and dyno'd again.

If memory serves correct the stockish rods prevailed.

[Tachyon]

It's slow at work, so I'll create a diagram.



As you can see, the angle is a bit different. However, it's very marginal.

Stock R/S = 1.70

2.0 Tall rod = 1.75 (whee..)

There might be some gains due to greater piston dwell at TDC, however I would be very hesitant to expect any real noticeable gains with that small of a change. (and I am usually the "go for it" guy when it comes to weird stuff). While I have no proof for this exact build, I would suggest the price of custom pistons is not enough to offset any performance gain unless you were also doing high compression, reverse offset, gas porting or something else to warrant the custom pistons.