Copper head gasket?

[gatty]

hey guys,

I'm thinking about turbo'ing my RB25DE - running low boost for now. A guy i was tlkaing to said he could replace my current gasket with a copper one for about 200 bucks and it would lower the compression?

Anyone out there with experiance could ya help us out

[BigDatto]

Copper gaskets work fine, it must be annealed (heated) before being fitted. O'Brien Aluminium in Smithfield NSW do a lot of these, might have one off the shelf for less. IMO you're better off buying a DET engine complete.

M'kay ??

[gatty]

yeah, but my budget right now is about 1500 for parts, he said he'd do it for 500 bucks

he's done allot of conversion engine swap stuff...

said he could get manifold for 300, turbo for 350 etc

[RB30-POWER]

A complete RB25DET bottom end would be more sucessfull in the long run, rather than thicker gaskets, de-compression plates etc.

I sold a complete RB25DET bottom end (short motor) with 40k on it for $150 the other day to a forum member here.

Im sure there must be a few more floating around, people want to get rid of.

[gatty]

150 bucks - i'd be in that.....

have to keep my eyes open maybe

[mjfawke]

Yes, it will lower the compression, but because the pistons are now away from the cyl head at TDC, the engine will be more prone to detonation (reduced squish area) and will get worse economy on part throttle (chamber turbulence). That is why you use low compression pistons or increase the combustion chamber volume.