Toyspeed.org.nz Message Board

by **no_8wire** » Sat Oct 21, 2006 2:19 pm

Does anyone know the piston negative dome cc's for a 4agze 8.9:1 piston?

by **no_8wire** » Sat Oct 21, 2006 3:03 pm

oh and the compressed thickness of a stock 4age 16v head gasket...

by **Bazda** » Sat Oct 21, 2006 9:20 pm

no_8wire wrote:oh and the compressed thickness of a stock 4age 16v head gasket...

1.2mm

by **no_8wire** » Sun Oct 22, 2006 8:53 am

is that the same for the 4agze as well?

by **Mr Revhead** » Sun Oct 22, 2006 9:05 am

by **no_8wire** » Sun Oct 22, 2006 9:09 am

sweet cheers guys...any idea on the depression volume in the pistons?

by **Mr Revhead** » Sun Oct 22, 2006 9:13 am

depends how much home and away they have been forced to watch......

sorry i dont. its a long weekend...... sounds like a good project to do today, measure it!

by **Bazda** » Sun Oct 22, 2006 9:15 am

putting in the 7A wont be the same as putting in the 4A so you need to put them in and measure the cc's

by **no_8wire** » Sun Oct 22, 2006 9:23 am

Its 0.44mm down the bore to the crown, how ever how would you actually measure the depression in the pistions them selves?

by **Bazda** » Sun Oct 22, 2006 9:28 am

put it into the engine with the top ring on and do ur checks using the water method and glass/perspex

by **Mr Revhead** » Sun Oct 22, 2006 9:33 am

dont forget the vaseline :wink:

by **CAMB01** » Sun Oct 22, 2006 3:19 pm

The dish volume for those pistons is around 6cc's (cubic centimetres), cant be accurate as that was measured from oversized pistons.

Trying to calculate compression ratio...