Originally Posted by
b19 dfp
going back to btcc rs 500s here...why do you think ford/cosworth desighned a thick wall block????it was for the intention of long studding to with stand high boost pressures...
Im not going to mention names or engines but have seen a nms block cracked and have heard of another(not slating nms here)believe me it will happen especialy over 500 bhp!when the heads not clamped it will move around and on std head bolts sooner or later something will give...
the egt temp doesnt prove anything other than its fucking hot!!iv seen temps like that on a 300 bhp motor..
how many miles did/has your motor done at 2.2 bar??
cheers danny
its now done over 7k of hard work and its still going strong. i only mentioned the egt as it shows how much of a hard life its had. it was mapped by stu so the map was as good as it can be but it got worked hard and often. ive had a long studded t4 yb at 2 bar and standard bolts t4 at 2.2 bar and no problems with either of them. 2 out of 3 of my grp a headgasket cars have failed though
and they were all strong stage 3 cars.