b16a2 , b16b Q's
 

besides adding the type r intake, cams, pistons, what has to be done to a b16a2 a b16b? Some type of porting or valve job, but does anyone know the specifics (diamter, angles)?

Re:b16a2 , b16b Q's
 

Both engines are basically exactly the same. However the type R engines are hand built, have ported and polished internals, higher duration and lift cam profiles, higher domes for raised compression on the pistons, lighter crank, lighter valves, double springs in the valve train and a lighter conrod. These are some differences internal to the engine. The intake manifold is slightly larger on the type r and is curved upwards unlike the non type Rs. The exhaust manifold is lighter and polished for better flow. JDM spec have a 4-1 header style whereas the AUS spec have 4-2-1 like every other one.


This is a quote from someone else Its pretty much correct im not sure why you would want to do this i would much rather build it for a turbo it would be faster and cost about the same if not much cheaper depends on what you are trying to run but whatever good luck

Re:b16a2 , b16b Q's
 

Is the ecu from a type r different from a si?

Re:b16a2 , b16b Q's
 

yes it is

Re:b16a2 , b16b Q's
 

piston has a 7mm dome with bigger valve reliefs...comp rings pushed lower...skirts are longer and wider to reduce vibration...oil ports under the piston on wrist pin hole...Molybdenum coated pistons for low friction...the connecting rods are made of high chrome carbon steel...crank has a tetra-methyl lead coating with smaller rod bearings...intake mani has a larger penlum with larger, shorter runners..fuel curve and timing totally bumped up..

Re:b16a2 , b16b Q's
 

this guy knows his ----

Re:b16a2 , b16b Q's
 

I'm surprised no one has mentioned this yet.
The CTR and ITR motor use the same block, which is taller than B16A blocks. The only differences between a CTR and ITR motor are CRANK, RODS, CAMS. The CTR is basically a 1.8L ITR motor de-stroked to 1.6L so it revs like none other.

Re:b16a2 , b16b Q's
 

Thats what i was going to post.. but you beat me to it :-P

I just learned that like 2 months ago.

Re:b16a2 , b16b Q's
 

The cams are the same parts number between the 2 motors.

Re:b16a2 , b16b Q's
 

only the exhast cam is the same...the intake is diff.
hond. part number 14111-PCT-000 ctr intake cam
ex-235 ctr
ex-235 itr
ex b16(2gen)p30-227

in-243 ctr
in-240 itr
in b16(2gen)p30- 240
in b16(1gen)-230

but the lifts are diff....thats where theres a semi power dif. and lost motion assymbley is larger on the b18c1,c5,b....the b16 has smaller ones.

Re:b16a2 , b16b Q's
 

my intake cam is the same as the ITR, cool ;D

Re:b16a2 , b16b Q's
 

is the itr intake the same as the ctr?

Re:b16a2 , b16b Q's
 

im guessing yours is a b16. duration is the same...but the lift is different.
b16 2gen
ex lift-.370
in lift-.421
itr
ex lift-.413
in lift-.453

Re:b16a2 , b16b Q's
 

Explain this in detail, I want to understand.

Re:b16a2 , b16b Q's
 

Duration refers to how long a valve is opened in relation to crankshaft rotation. This open valve time period is expressed in degrees of crankshaft rotation. So, a cam specification of 220 degrees duration simply means the cam holds the valve open for 220 degrees of crankshaft rotation. As strange as this may sounds, more duration can be helpful in high RPM engines but not low RPM engines. The extra degrees of open valve time in high RPM engines gives the air flow a little more time to get into (or out of) the cylinder in spite of the piston's stroke. However, at lower RPMs, more duration can cause less power because the valves will be open at the wrong time in relation to the piston's stroke up or down in the cylinder.
While duration refers to how long the valve is opened, cam lift is used to determine how wide the valve is opened. If the valves are not opened wide enough, they will cause a restriction for the air trying to enter or exit the cylinder. However, opening the valve past a certain point will not increase the flow to (or from) the cylinder. It is necessary to understand a large amount of science to understand how the flow is related to how wide the valve is opened and how this affects the engine's power. Too much isnt good but too little also isnt good. but like in most performance....you loose some here..but you gain some there. hope this helps.