I was trying this thing in my escort and in my 240. On a 240 it didn't kinda work out too well. First of all since i got stock pedals it takes to long to drag my left foot across w/o hitting the clutch pedal. Plus, my guess would be that it's gonna be easier to press brake and gas pedals at the same time with your right foot and using left for the clutch.
On my escort though (since it's an auto my left foot never does anything) left foot braking in corners was alot of help. I dunnow exactly how it works, but i guess that with the brake and gas both depressed, i'm loosing traction in my rear and yet gaining in the corner by depressing gas in the front. So in rwd cars, it'll be backwards, cuz you'll be braking the front and rear and accelerating in the rear. So basicly u'll be getting understeer from front wheel loss of traction? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>
Anyways, my Proof for fwd: Me in my escort and my friend in his 1990 accord race from time to time on these roads we got. I constantly beat him in the corners even though my car is higher, got worse suspension and is less powerfull. So when i told him what i was doing in the corners and he tried it, he started to beat me...
Well anyways, i'd say fwd cars gain alot by LFB but i see no use for it in rwd cars <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>