Rb30det Into Lc Gtr Torana

[frogstomp_R31]

around 43 some thing cc i thaught it was low to say the laest but my dads mate who built a few big block etc say it should act like a closed chamber head amd make more comp also giving me a bit better off boost drive

Edited July 20, 2006 by frogstomp_R31

[Cubes]

Well my golly gosh..

With a 43cc combustion chamber he will achieve 8.5-9.2:1 comp ratio with the turbo turbo pistons. The comp ratio variation will depend on deck height.

[Bl4cK32]

isnt 8.5 to 9.2:1 a big jump, hence why i said about it depending on the few "smaller" things....?

[Cubes]

I was playing it safe as I don't really know re: the stock deck height

I don't believe the std pistons sit down in the bore as the calcs don't work out..

So with a 0 deck height (as stock ratio calcs work it out to be) mr frogy will have a 9-9.2:1 comp ratio.

[mr_rbman]

I was playing it safe as I don't really know re: the stock deck height

I don't believe the std pistons sit down in the bore as the calcs don't work out..

So with a 0 deck height (as stock ratio calcs work it out to be) mr frogy will have a 9-9.2:1 comp ratio.

Serious? I don't understand how that can work, will be very interesting to see his results once its tuned etc!

[Cubes]

Serious? I don't understand how that can work, will be very interesting to see his results once its tuned etc!

Such a small combustion chamber. Do remember the bore of the rb20 is 78mm or something.. So thats a 7mm over hang all the way around.

[frogstomp_R31]

yeah like a closed chamber head

[frogstomp_R31]