MG B eating manifold gaskets

[awooga]

Hi folks,

I've got a tuned up MG B which seems to have a fondness for blowing the exhaust / inlet manifold gaske - that's the fourth time in just over a year. I've even started using a mix of instant gasket and brand new gaskets as they're so cheap, but it's only lasting a 100 miles tops before it starts blowing again.

It's got a peter burgess stage 2 head on it and a peco LCB exhaust manifold with standard SUs, pushing out 122bhp on the rolling road. As the works Bs must have been pushing out more than this, I'm assuming it's not a common issue.

Anyone got any advice? Is there a performance gasket kit? Does a weber sit on the same manifold, or would it be worthwhile looking at that as an option?

[awooga]

Just got the gaskets through normal suppliers - haven't used club / b hive / moss ones in particular. Will have a look at the manifold again - it's an old one and it's possible it's just corroded enough to make it difficult to get a proper seal. Just really annoying having the two manifolds on one gasket - as soon as you get the exhaust one torqued up properly, you have to put the inlet one on the same gasket.

[awooga]

Thanks folks,

I'll remove the manifold again this week and take it to one of the local motor engineers, have it cleaned up and checked for straightness. It's been on the car for years and it's got a really good flow on it so I'm loath to lose it.

[awooga]

Thanks, that's my intention - if I can get away without skimming it then it'll be brilliant. Also, cheers to Haddock, I'll use the US spec one when I replace it.