Is there any advantage of the B20 head over the B18?

Also is there much variance in the B18 non vtec series heads...............is B18A, B18B etc etc?

 

i was once told that b20's have bigger valves compared to the b18 but i asked it on this forum and everyone said that they were pretty much identical and that they didnt have bigger valves. i dont know about the b18a though

 

Heads are the same, but the B20Z intake cam has 0.3mm more lift. Which means it's basically the same.

 

b20's have bigger valves and they make more torque! you need an LS intake manifold. The advantages from a b18b over a b18a is, that the intakes flow better and slightly higher cam profiles.

 

Is there any advantage to using the JDM B20 throttle body over a regular OEM B18 throttle body?

 

ok how does a b20 head make more torque? and howmuch bigger are the valves in a b20?

 

this thread is jacked.

b20 and b18b heads are cast the same. they are the same part # from honda.

the cams are different.

the valves are the same.

 

I think you're talking about the motor.

Bigger valves = more torque? Ahhh thats why those 33mm intake valve diameter VTEC heads are so torquey.

The heads are the same, if there are slight 0.036546543290mm differences somewhere somehow, it doesn't matter. Why? Because you're serious about performance and are getting it ported anyway right?


[Modified by teg92, 11:49 AM 10/21/2002]

 

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[Modified by 311, 12:07 PM 10/21/2002]

 

and might I remind you that the difference between the "1.8L" and "1.6L" is 237cc's and the difference between the "1.8L" and "2.0L" is only 138cc's...

 

The B20 head is the same as the B18B head (1994+). But both the B20 and B18B heads have bigger ports than the B18A (1990-1993) head. As for the 138cc difference, it is interesting how this small increase in displacement can make such a huge difference. But then again, the compression increase (9.2:1 to 9.6:1) probably also helps.

 

 

for all to know.

big valves = slow velocity at lower RPMs, they will flow more fluid (air/fuel) in a shorter period of time, meaning they will breathe better at higher RPMs. end result LOSS of lower end TQ/ higher RPM capability and likely more HP.

small valves = high velocity at lower RPMs, they will flow a small ammount of fluid over a set period of time, meaning they will run out of breath at higher RPMs. end result, HIGHER TQ/ smaller powerband.

 

only if a 2mm larger bore is an advantage...

d

 

i heard that b18a heads are ****. i heard that if i bolt up a b18b head to my b18a block that the head will give me 10 more hp. i also heard that b20 heads have better stock cams too.. what years was the crv make ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by samagon &raquo;</TD></TR><TR><TD CLASS="quote">for all to know.

big valves = slow velocity at lower RPMs, they will flow more fluid (air/fuel) in a shorter period of time, meaning they will breathe better at higher RPMs. end result LOSS of lower end TQ/ higher RPM capability and likely more HP.

small valves = high velocity at lower RPMs, they will flow a small ammount of fluid over a set period of time, meaning they will run out of breath at higher RPMs. end result, HIGHER TQ/ smaller powerband.</TD></TR></TABLE>

what head has the bigger valves. i want low end power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wm5holla &raquo;</TD></TR><TR><TD CLASS="quote">i heard that b18a heads are ****. i heard that if i bolt up a b18b head to my b18a block that the head will give me 10 more hp. i also heard that b20 heads have better stock cams too.. what years was the crv make ? </TD></TR></TABLE>

well you've heard a load of bullshit my son. congratulations, keep spreading nonsense.

 

Put a sohc head on your b18 and you will make way over 10 more horsepower (sohc = less rotating mass, which mean you can use the "Found motion assemblies")

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94goldjungsr &raquo;</TD></TR><TR><TD CLASS="quote">

well you've heard a load of bullshit my son. congratulations, keep spreading nonsense.</TD></TR></TABLE> im sorry so , some one tell me the truth!!