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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » Altering Stroke Longer/Shorter (C20XE) » Post Reply

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Robin

posted on 3rd Jun 05 at 21:59

shorter rod would make the piston drop lower in the bore on the down stroke, but wouldnt get as close to the head on the upward stroke, so compression ratio would be lower, as the volume of the space when the piston is TDC is bigger

longer rod would not go as low in the bore on down stroke, but would be closer to head on upward stroke, raising the compression ratio (TDC piston volume lower), IF... it didnt his the face of the head, which it probably would


ed

posted on 3rd Jun 05 at 20:58

No because the piston is still able to move to the fully upper most position at the top of the bore. The engine code for the 2.2 engine is X22XE so it uses the same compression ratio of 10.0-11.5 : 1...

But, now I'm slightly confused about it too :(

[Edited on 03-06-2005 by 1800ed]


Siberia

posted on 3rd Jun 05 at 15:00

you would loose some compression yeah?


Joff

posted on 3rd Jun 05 at 14:55

2.2 conrods too... I think I saw somewhere in the US that manufactured them :!


ed

posted on 3rd Jun 05 at 14:17

Think you need the 2.2 con-rods too acutally which are proably a bit shorter... Basically you are making the piston move down furthter into the bore.


Siberia

posted on 3rd Jun 05 at 13:49

but when the piston gets to TDC would it not be sticking to high... and clattering the valves? interest concept though...


AK

posted on 3rd Jun 05 at 13:35

quote:
Originally posted by Siberia
what affect does doing this have anyways?


as ed says.....

lets you get more air/fuel into the cylinder


ed

posted on 3rd Jun 05 at 11:56

To change the stroke on an XE you can put on a 2.2 Ecotec crankshaft, that will increase the displacement to something like 2198cc, could then bore out the block to get it to about 2250-2300cc at a guess... Don't think changind the con-rods would do anything usefull though.


Siberia

posted on 3rd Jun 05 at 11:34

what affect does doing this have anyways?


CorsAsh

posted on 3rd Jun 05 at 11:23

If you put shorter ones in, would you get low compression?


AK

posted on 3rd Jun 05 at 11:05

quote:
Originally posted by Adam Kindness
i think you'd want to alter the crank....

longer/shorter with same crank wont do much as the piston is going to move linearly up or down

i.e.... if you lengthen a rod, it wont stroke down as far, but will stroke higher



AK

posted on 3rd Jun 05 at 11:05

i think you'd want to alter the crank....

longer/shorter is same crank wont do much as the piston is going to move linearly up or down

i.e.... if you lengthen a rod, it wont stroke down as far, but will stroke higher


Filby1

posted on 3rd Jun 05 at 10:18

What difference would you get in putting: i mean longer than standard and then shorter than standard?

A: Longer Con Rods

B: Shorter Con Rods


[Edited on 03-06-2005 by Filby1]