need help with compression on JRSC

[civicsc]

do you guys know..what sould be the best compression ratio for an b18c motor at 10 psi is 10.5/1 is ok or do i need less....


i am curently running a b20b v tec whit 85mm bore and 8.5/1 compression..and running the b20b crank pulley..and only 7psi du to my big bore and low compression..dyno result 213hp 161ft/t at 8200rpm...

now i want to built a b18c with proper compression ...doest any body has dyno result...

thanks civic sc

[DC2NR]

stock compression seems fine, but i noticed on type r's @ 10psi ported chargers make 260+

[civicsc]

what is your hp on your set up..and did you change piston or anything thanks dude...

[DC2NR]

i made 209 with with 120,xxx miles on the motor @ 9 psi, going from 180 to 209, thats stock everything, except supercharger, fuel system, hondata, short ram. i def make more hp now tho, i bumped it up to 12.5 psi, and got a 2.5" exhaust ran. i can easily walk on mid 13 cars.

i just dont see why u should rebuild for a supercharger setup. but it wouldnt hurt, unless u planned to squeeze some crazy hp number like 300whp supercharged, no nos.

[civicsc]

thats the thing i want 300hp at less...
i ran 12.94 @105mph with type r lsd tranny..
at 7psi..
i am curently running the b20b cranck pulley..on a b18c its suppose to be 10 psi set up but the thing with my b20 bore 85 mm and 8.5/1comp...i drop 3 psi so i ran 7psi cause my chamber is bigger than the b18c....

now the thing...i have a b18c1 with b18c5 head...and what to change the piston and everything ...i would probably be 81.5mm with 10.5/1 comp... with all this...
1994 civic with rollcage
b20b
b18c5 head ported
wiseco piston 85mm
supercharger 7psi..
custom 2.5 stainless exaust
tranny type r lsd
valve et spring retainner titan
cometic head gasket
arp head stud
70mm trothel body
walbro fuel pump
skun fuel rail
450cc injecteur
clutch 6 puck ceramic
p28 avec hondata s200
and more...

will it be ok for 300whp you think...
and probably by the LHT intercooler kit....

[DC2NR]

do not get the LHT intercooler, you should get the supercharger ported.

my friend tim has a stock type r with JRSC and crv crank pulley, kamakaze 4-1 with 2.5" collector and skunk2 exhaust, aem short ram. he put down 274 whp. thats only 26 shy of 300. STOCK internals. manifold temps at 160-170, my manifold temps get to 200-210

[civicsc]

you think so ...you meen by porting ,the intake of the supercharger will be better then the lht intercooler kit..at less it s less for porting....

so with me set up it should be around 300whp,,you think...thanks bro... [img]smile.gif[/img]

<font color="#a62a2a" size="1">[ October 30, 2005 09:00 PM: Message edited by: civicsc ]</font>

[civicsc]

IWAS RUNNING A B20B BORE TO 85 MM BUT 8.5/1 COMP. [img]graemlins/thumbs_down.gif[/img] .AT 7 PSI....213WHP AND 161TQ

NOW I WANT TO BUILD UP A B18C WHIT 82MM BORE AND 10.5/1 COMP..WHIT ALL THE SAME KIT THAT YOU SEE UP THE THREAD...

NOW THE LHT INTERCOOLER IS LIKE 995$US +395$US FOR THE ESCHANGER KIT...LIKE 1400$US...OVER 2000$CAN FOR ME....IS IT REALLY GOOD OR NOT...OR GO WHIT SNOWPERFORMANCE LOL 400$ YOU KNOW..

THANKS FOR YOUR HELP KINGMARC...AND DC2NR...

<font color="#a62a2a" size="1">[ November 01, 2005 03:44 PM: Message edited by: civicsc ]</font>

[kingmarc]

if you can't get a used lht intercooler like me then the snowperformance will be your best bet.
ps. high cr ratio (10.5-11:1) in combination with 85mm bore is your best bet to achieve close to 300hp. But keep in mind that this set up will be very hard to tune.

[civicsc]

WHY I USE HONDATA S200... [img]graemlins/wonder.gif[/img] ho ok you meen the snowperformance kit is hard to tuned... [img]frown.gif[/img]

<font color="#a62a2a" size="1">[ November 01, 2005 11:09 PM: Message edited by: civicsc ]</font>