BA XR6 Pistons - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

ianmcginley · 11-16-2003, 02:09

Just got me thinking, not that I am pondering this but i'm sure that there will be some sick minded people that might. But here goes:

How compatible with the Petrol engine are the LPG high lift pistons? Standard XR6 (BA182) engines come with pistons offering 9.7:1 (or is it 9.5, i can't quite remember). Anyway, the LPG unit comes with 10.7:1 and the XR6T comes with 8.7:1.

Naturally upgrading to a 10.7:1 ratio would require premium (95RON+) fuel, but are they likely to be different in any other way (different material etc) due to being for the LPG E-Gas engines?

What sort of performance increase would this see (speculations please) and why couldn't it be done?

Also what the hell units are those ratios in... Is that like 10.7 atmospheres of pressure if ambient is 1 atmosphere? or something else?

madmelon · 11-16-2003, 20:42

It is the ratio of volume of the cylinder at BDC vs volume at TDC. Ratios don't need units...I think u'd be hard pressed to find a ratio that needed a unit.

ianmcginley · 11-17-2003, 13:20

Quote:

Originally Posted by madmelon

It is the ratio of volume of the cylinder at BDC vs volume at TDC. Ratios don't need units...I think u'd be hard pressed to find a ratio that needed a unit.

Ahh very true :) Good explanation too :)

And here I was thinking it was something exotic like atmospheres of pressure given ambient of 1 atmosphere

Learn something everyday.... ANyway does anyone think this modification is possible? viable?

I_wanna_XA · 11-18-2003, 22:32

I think ford should do this to the NA XR6 from the factory, requires PULP