just want to know much power it comes out to and how fast. I dont know anyone else who has that as well.


[Modified by B18CRacer, 8:31 AM 1/27/2002]

 

anyone have an idea?

 

it wont really make a difference unless you do ls vtec

the only difference between a b16a head, gsr head, type r head is that the type r head is the only that is already port and polished from the factory

 

actually...there is a big difference between heads...port angle etc.
the big thing is the combustion chamber on the gsr head...its alot smaller on the gsr....
so if you just slap a itr head on a gsr block you might gain some top end becuase of the cams and the ports, but will lose some low end power because of the loss in compression..

a great solution is to buy some 00-01 type r cams and have the gsr hed ported..

 

the intake manifold is ported. and the cams are different. you will gain more compression.

 

unless u plan on upgrading to higher compression pistons and combo it with aftermarket cams, u will actually lose some hp. why? the gsr head has a smaller chamber compared to the b16 and ITR. hence, that'll create a good compression with the b18c1 block and pistons. if u put the ITR head on a b18c1 block, it'll breathe better but the gains are minimal, if any.

and no, the ITR or b16 won't give u more compression compared to the gsr. the gsr will produce more compression because of it's specific design...followed by the b16 head and the ITR head.

hth.


[Modified by randyman, 1:04 PM 1/27/2002]

 

yep thats what I did.

 

So if it was stock type r head on a stock gsr block it wouldnt create any extra compression. hmmm because i was running it like that before and I thought there was a difference in torque.

 

Using stock pistons on a B18C1 block, and a B18C5 head, your compression ratio drops from 10:1 to 9.6:1.

I think you're just relying on the butt dyno too much.

 

what if you had the pistons and rods too? how much would you benefit with the head.

 

You would gain some, but the better option is while you're getting your pistons/rods done, get the gs-r head ported. If you go to the right people, it should flow better than an ITR head.

 

i dont know there is this guy from super street that said the type r head on the gsr block created more compression. check the website out: http://www.drtracing.com/cars/f_froggie/froggie1.htm

 

read the article again. greg said that he knew that the "ITR head will lower the compression". i know of greg. i'm a member of hybrid too and i see his posts over there. there are a lot of factors involved when it comes to 1320 runs. greg might've ran faster with the ITR head but he didn't specify the other parts that he combo'd his setup with. he didn't specify if he used slicks. yada this, yada that.

go here http://www.importreview.com/d_1.8.html and check out the dyno numbers for the ls/vtecs with a gsr head and a b16 head. hope that clears this debate.

 

How about a 99 acura integra type r head (B18C5) on a 95 Gsr block (B18C1)?

 

if ur asking about the dyno results for the ITR head, then it's almost the same as the b16 head.

 

then i should sell my gsr block for a b20 block?

 

ok from so much thinking and stress....this helped the most..its a calculator that adds up the compression of any head on any block... http://www.bojangz.com/calculator/

It says i didnt lose that much compression but i did lose some.


[Modified by B18CRacer, 12:58 AM 1/29/2002]

 

yeah that flash compression calculator made by bojangz is pretty cool. we'retrying to convince him to add the info for the b20's. anyhoo

yes. with the stock b18c1 block and b18c5 head combo ur compression will go down to 9.2'ish.

 

if u already have the gsr block just keep it. it's a very good candidate for an all motor setup. since it has a higher rod-to-stroke ratio than the b20 u can stuff the gsr block with goodies and rev it to 9000-9500 easy.

 

i can also gain the lost compression by getting a 1 layer head gasket? what kind would you suggest?

 

omg ok b16 head or b17 or b18c5 head will lower the compression nuff said......it will bring the compression level from anywhere to 9.6-1/9.8-1
i have a b16 head with ITR intake manfold and throttle body and itr intake cam on my gsr bottom and tell yah what the full gsr motor was stronger.
i ran slower at the track and i wasnt happy. now that my car is fully built with a nice turbo under the hood its a little faster now oh yah and the 10-1 je pistons and shaved head

 

welll the type r head would be good for turbo setup later on.

 

there is no such thing as a 99 ITR!!!!

 

yes there is a 99 itr, check in canada and japan and all of europe, there were no usdm 99 itrs

also dont switch the heads, you lose compression and will lose some whp in the end

 

i sense that no matter how we explain it to u, u will still push on the idea that the ITR head is for u. it's ur money go ahead. why did u ask our opinions in the first place if ur still adamant on the ITR head giving u more power?