gurnE

Time for a rebuild to get rid of piston slap (worse than it should be, always there a little)

At the moment the cars only running greens & 3bar

Gonna go to T34 and maybe a live map on greys or similar.

If I don't plan on going past that point is there any point of going low comp??

Anyone know how much 4x4 piston lower comp by when fitted to a 2wd and are they a direct fit?

Edited to add opinions on long studding too please!

CheeRS

Darrone

I wouldn't mind knowing the answers to this as well!

smokey

Ditto!

Anonymous

from what ive been told there would be no point in going for low comp pistons if the cars running fine and you dont intend to mod the engine any more they are direct fit the main diff between normal and low comp is they have a smaller height alowing more room in the engine a cheaper way off getin the effect of low comp pistons is to have your orginal pistons skimmed this giving you the same effect and it would allow you to change the compression ratio of the egine not sure by how much tho but it will allow you to run serouis boost prices vary but try burton power they sell em and can skim pistons to, hope this has helped you a bit im in the same postion with my FRST to have pistons skimmed or buy low comp??

frstboy

swerv

im sure you must mean machined and not skimmed

Anonymous

same diff mate

Guinnless

swerv's right.

Machined is not the same as skimmed. If you skim 'em you bugger up the squish area.

To answer gurnE's original question. Assuming the engine is untouched from new then fitting 4x4 pistons will bring the CR down to 7.8:1.

I'll be going greys on a Stu live map with standard 8:1 fairly soon. That's the plan anyway.