Originally Posted by
Cosworth Rallyesport
138.7 is a huge difference to 139.0mm though!!does not sound alot but it is in terms of long term investment in an engine/head.
as for 137.0mm,that really is scrap area,your well into the valve seats at that but with money and skill its ok for a N/A aplication,but at 137.0mm you have lost your squish area for combustion.
matt,you really hate traders dont you!!your always having a go at them,i would think pauls forgot more about cosworths than most folk claim to know in this land!!
i guess over the last 3 years ive maybe had 50 cylinder heads,thats a concervative figure,of which maybe two were at 139mm,one i distinctly remember was at 139.1 and i got £700 for it to a guy in finland.
as for you waiting for cosworth to recast heads,it will never ever happen,if in your wildest dreams it did do you know how much a knew one would cost?
well done Tim ,,i couldnt be arsed to write that lot ,lol,,
as you say , people do use heads below the " real usable limit " with thick gaskets and think its ok ,,then wonder why they drop a valve ,,lol,
I would never use one on a good engine below the 138.6 limit , altho i know plenty of people who have
And the reason people like Matt always have a go at traders is because the would realy love to be a real trader like us Tim , but know they havent got what it takes ,,Balls , and brains to do it ,,there happy selling shit to others and getting away with it by justifying the shit because its cheap ,,not like robbing bastard trader prices ,,lol,