which one should i go with? I know a type r head is already ported some and a gsr head isn't but how much more can a gsr head be ported and how much more can a type r head be ported?any advice will be apreciated.

 

well the b18c5 head is factory port and polish and has better valvetrain.

if i were you i would get the b18c5 head and rework it in getting aftermarket camshafts,springs,retainers ect. because basicly the head is already ported so upgrading the valve train could be in the works instead of port work

if you went with the c1 head you would have to have it ported and polished and then eventually rework it too, cams,springs,retainers ect

 

i thought so but what which head can i get the most performance out of doing the same headwork on both the c1 and c5 head? if i do a full race port on both heads and upgrade cams, springs, retainers and valves which one would be better is pretty much wut im asking.

 

if the b18c5 and b18c1 had all the same internals and machine work done to it, the only thing i can think of is the difference of compression... the b18c1 will give you around .2 more compression, just a tiny lil bit of power...

 

Not the only difference:

The vavlve angles are different as well. If my memory serves right the C1 is 36I 37E and the C5 is 37I and 38E

Also the combustion chamber is smaller on the C5

The type R (c5) head is a glorified B16 head-Thats it.

 

^^ oh I didn't know. Do the difference in valve angles affect performance in any way??

 

I believe the b16a head is comparable and interchangable with the b18c5.

 

yes the b18c5 head is a b16 head only is comes factory ported and polished from honda, along with a beefier valve train

 

the type r is better for different applications,what r u trying to do

late mike -team1320

 

Truthfully-Weve tested both stock and the difference is so small it is not worth it to say there is a difference. Now if they were more than a couple of degrees off that would be one thing but when they are within 1 degree there is no difference.

 

well what i want to do is a 12 second street car and have it be all motor. so i just wanted to know if i should run the c5 block with a c1 head or should i just run a full c5. does anyone know where to go to see horsepower numbers on full built all motor c5's and c1's?

 

duuuuuuuuuuuuuuude. The search button is so easy to click on and use. Im sorry to pull this but search! There are many many many different topics on this issue. If you want a 12 second street car you better have thousands of dollars just laying around. You will need major engine work with many mods. Its not just an engine swap and your 12 seconds. You will need all new valve train, with nice cams, head work, built block.... pretty much all new internals... You will need major bolt ons and slicks for tires. Oh and your car will need a diet.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1QcKCrX &raquo;</TD></TR><TR><TD CLASS="quote">Not the only difference:

The vavlve angles are different as well. If my memory serves right the C1 is 36I 37E and the C5 is 37I and 38E

Also the combustion chamber is smaller on the C5

The type R (c5) head is a glorified B16 head-Thats it.</TD></TR></TABLE>

i could have sworn the c1 has the smallest b series combustion chamber

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98ekhx &raquo;</TD></TR><TR><TD CLASS="quote">

i could have sworn the c1 has the smallest b series combustion chamber </TD></TR></TABLE>

it is... thats why the c1 yields a higher compression ratio..

 

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

it is... thats why the c1 yields a higher compression ratio..</TD></TR></TABLE>

i knew i was crazy

 

well i know that simole engine swap wont give me a 12 second car...i know that i am going to need all new valve train components, i know that its possible to hit 12 seconds on a stock bottom end my friends have done it before. i just wanted to know what engine would give the most power.