well guys i have search around everywere and haven't found the answer im looking for......sry if i'm just making another post about this.....i have a complete jdm gsr head and a complete jdm type r block that i got from a friend.....i was wondering what kind of CR i would get from this combination and has anybody done this hybrid ever cause looking for some dyno numbers as well.....also by doing this would i still be carb legal or not.....any info would be great thx.....o yeh if i didn't explain well enough ahahah feel free to point out my mistakes thx

 

bump.....for some replys

 

with this combo would only bring you up a few points..
the gsr has a little less combustion chamber room (higher compression)
where the b16 and type-r use the same castings
as far as carb legal i don't know

 

ic well iam planning to swap type r internals and camshaft to boost it up some more not only that i'll be changing the type r pistons for civic type r's.....but wats the highest CR i can to still be able to use 91 octane gas thx

 

that sucks for you guys out there here we have no bar-

 

this one's for you, Mr. OP:

http://www.zealautowerks.com/

put in all your info and it magically pops out a compression

 

that a good site bump

 

What CR did you come up with, I may have something wrong, but I came up with 13.09:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreFerio &raquo;</TD></TR><TR><TD CLASS="quote">What CR did you come up with, I may have something wrong, but I came up with 13.09:1</TD></TR></TABLE>

sounds about right with pct's

keep the jdm itr's or use p30's instead for a more sane c/r

 

i got 11.56:1 how did u get 13?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GsrIntegra789 &raquo;</TD></TR><TR><TD CLASS="quote">i got 11.56:1 how did u get 13?</TD></TR></TABLE>

gsr head
gsr/itr block
gsr/itr crank and rods
pct pistons
oem headgasket

=

13:1

 

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

gsr head
gsr/itr block
gsr/itr crank and rods
pct pistons
oem headgasket

=

13:1</TD></TR></TABLE>

yup i used to run this set up, the only reason it didnt ping or detonate on 91 audibly was because of the huge cams i was running. If your gonna run ITR cams then definitely just keep the ITR pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by doood &raquo;</TD></TR><TR><TD CLASS="quote">gsr head
gsr/itr block
gsr/itr crank and rods
pct pistons
oem headgasket

=

13:1</TD></TR></TABLE>

oo ic. i put p73 pistons thats why i was getting 11.6

 

icic ahaha i guess all im making would be a poor mans type r lol.....but were can i get higher octane gas if i do go higher then 11.1 CR or can i still use 91 thx

 

humz.........1 more question doesn't the civic type r CR 12.1 right so don't it run off from 91 octane correct me if i'm wrong thx........o yeh nobody answer my question high high of a CR can i go before i have to use higher octane gas thx

 

you can concievably run 12-13:1 on 91 with good tuning and cams with lots of duration.

but just be safe and smart about it and go 11:1 and still make the power

 

icic ahah thx man but still would like to have the CR of 12.1 lol probley just trying to hit the 200hp mark or probley alittle bit over that and hoping to stay carb legal

 

you dont need tons of compression to break 200whp

 

ahah thx for clearing that up.....wat would be a good set up to get around there or mybe a bit past it thx again