General CTR B16b Information spark plugs, bore size, cooling system etc


Super Moderator
Dec 5, 2006
Here are some threads compiled, its kind of like a min FAQ:



1. Cylinder Head - Minor port & polish
2. Exhaust Valve Spring - High-lift, dual-layered spring
3. Sparkplug - High-heat-type #7 platinum plug
4. Pistons - High-compression, low-friction coated, custom pistons
5. Connecting Rod - High-output, high-durability, lightened, custom conrod
6. Engine Stiffener - Aluminum die-cast, high-durability, one-piece type
7. Crankshaft - Full-balanced, 8-weight, high-output, custom crankshaft
8. Inlet Valves - Lightened inlet valves
9. Inlet Valve Springs - High-lift, flat-surfaced, dual-layered spring
10. Camshaft - Wide-angled, high-lift, high-durability camshaft
11. Intake Manifold - High-RPM type.

Regarding bore size:
What is the maximum bore size i can run on my b16b b16a b18c b18a b18b:

82 mm max without sleeves
85 mm max with sleeves (for circuit racing)
86 mm max with sleeves (for drag racing)
It is also worth noting that your engine build or tuner should have the final say, also while 82mm is the maximum you can run with OEM sleeves you can also run 81.25mm or 81.5mm.

Regarding Spark Plugs:
Honda Genuine Parts - NGK - BCPR7E-11
EK9 Honda Civic Type R Specific:
NGK - PFR7G-11
Info obtained from a ek9 honda civic type r manual.


Q: Why is it important to remove all air from the cooling system?

A: If air is trapped inside the engine block or cylinder head(s), it will cause an overheating condition. This could result in very costly engine repair or possibly engine replacement. A radiator or fill tank can look full but it does not mean that the engine block or cylinder head(s) are full.

Q: How does the air get trapped inside the engine?

A: Many newer model vehicle designs have lower hood lines and are more aerodynamic, which means that the engine is positioned higher than the radiator. While this promotes a more attractive, sleeker look, it creates a problem within the radiator. Basic physics tells us that water, which is part of the engine coolant, seeks a natural level. The coolant cannot be drawn into the engine efficiently because air exists between the upper portion of the engine block and cylinder head(s).

Q: How do you remove the air that is trapped in the upper portion of the engine?

A: You vacuum it out using the AirEvac (P/N 04700) from Mityvac“. This is a tool that creates negative pressure within the cooling system (a vacuum). By creating this vacuum, it removes the trapped air and refills your cooling system while still holding your system in a vacuum. All fluid will be drawn from the coolant container into the system until it is full. (Ensure you have enough coolant mixture before performing this task.) Once the system is filled the vacuum will no longer exist because the coolant now occupies the void. No Air! No problem!

Q: Air never hurt my old vehicle. How can it hurt my new one?

A: Radiators in the older vehicles were positioned higher than the engine. It used to be easy to just fill the radiator and run the vehicle until the thermostat opened and then top it off, put the radiator cap on and drive away. With newer vehicles, most manufacturers specify to purge the air out of the cooling system. If air gets trapped in the engine block or cylinder head(s) and it is run for any period of time it will cause "hot spots". This will damage head gaskets, the cylinder walls and the entire cooling system. Overheating and expensive repairs will be the end results.
info obtained from mity-vac webpage

original threads found here:

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