run a smaller head gasket...
hey all my car is running a 1mm head gasket and has flat-top semi skirt pistons in it. the compression is 8.7. iv been rackin ma brain thinkin of a way to raise the compression so i was just wondering if there was any cheap, easy way to do it n give it a little extra edge.
thanx all
run a smaller head gasket...
TRD have gaskets at several different sizes
0.5mm and 0.8mm are ones i can think of at the moment. they will bump the comp up a bit. while the head is off, you can have it faced. that will help a bit.
faced? could you explain this to me please? never heard of "facing"
the surface of the head that goes onto the block is flat.
if you get this surface machined and have a very small amount taken off, this will make the combustion chamber smaller.
smaller area with same amount of air = higher compression.
there is a limit to what a machine shop will remove. you dont want to take to much off, otherwise the head is no good and un repairable.
i took 20 thou off my head, and 10 thou off the block.. (the head needed to be straightened first though.. with a bit of post work.. came up very very well..
As for cheaply, there are 2 lots of pistons cheaply available
The ACL 100KW ($200 a set) and the Toyota 100KW (about $400 a set) (see below)
The Toyota Pistons are raised further then the ACL,
I am running new Toyota pistons in my engine, which also might have a ceramic top coat similar to the forged pistons (see below), as well as a 0.5mm TRD head gasket, The combustion chamber has also been cleaned up and 10 thou off the head and block to get a good clean mating surface. The engine does not ping with set up on 98 octane fuel, but does on 95/92 so its probably close to the limit.
Ben.
Posting Permissions
