Quote:
Originally Posted by Halon
Work has started on the new motor. Couple things interesting worth noting.
Some Factory 2JZ-GE VVTi measurements he took:
- Head chamber volume 41cc
- Piston volume 9.5cc (he cc'd a set of GE non-VVTi pistons as well with a value of 8cc)
-Piston / Deck clearance 0.003" popping out of the deck (he temp installed a set of GE non-VVTi pistons/rods as well with same measurement)
- Head step down recess is 0.028"
All good info to help me decide exactly what we do with the build as far as how much we deck the head, what head gasket to run, etc.
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My general advice is to always leave as much meat as possible. Machine all surfaces the least amount possible to achieve the surface finish or trueness you want. Don't machine just to machine if the surface is good as is.
Achieve your other goals with hg thickness, rod length, piston design etc.
This is the safest route long term.
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