a 3zz is an actual econommy motor in Europe. please don't get the two mixed up.
what you're talking about is the 2zz-ge stroker kit.
i'd get the xs
isnt there a 3zz made by trial? you give them your used 2zz and they bolt/replace a few things on it (basically a bigger engine?) and presto...3zz conversion.
yeah, they pretty much increase the stroke and increase the compression by replacing the rods with longer ones, and do some other stuff.
Engine Crank, Connecting Rods, Pistons,
Crank End Spacer Ring, Crank End Oil Seal,
Front Spacer Washer, Metal Head Gasket.
For a base, a new or used 2zz engine must be provided or paid for by the customer.
Original mounts are slightly modified and used.
Apex-i power FC or HKS F-Con V-Pro can be used for maximum performance.
The car will run normally without any fuel modifications until you start
to put on the gas.
Other fuel controllers such as Apex-i S-AFC might work but Power FC and V
Pro are recommended for best results.
After the kit you get about 220 hp and 20 kg of torque. on Japanese high octane gas (105).
The Engine will hold up to 8,000 RPM. The valves are thought to be the weak point of this engine.
The stock valves are generally ok up to 7,000 rpm, but if you plan on going over that,
a valve kit is recommended. The valves used on the Trial Shop Car are $2434.95.
Stock valve springs are fine.
Compression for the kit is raised to 13:7.1 but it can be left at stock as well. The higher compression increases power but
would cause problems with lower octane gas.
Note: Quality of gasoline varies from country to country. The above stats were acquired with Japanese 105 octane gas.