b20 non-vtec dyno numbers

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1


Shane Thompson’s 91 Integra GS - B20Z, DC header, CRV TB: 139 whp / 129 ft-


Val Berechet’s 97 Civic HX - B20Z, Crower 62404’s, Skunk2 mani: 159 whp / 134 ft-lbs


Val Berechet’s 97 Civic HX - B20Z, Crower 62404’s, Cam gear tuning/JDM ITR header: 166 whp / 140 ft-lbs


Val Berechet’s 97 Civic HX - B20Z, 62404’s, 11.4:1 compression, OBD-I ECU: 174 whp / 152 ft-lbs

B20b stat info:
BORE - 3.317 in, 84.2519685 mm
STROKE - 3.433 in, 87.1983744 mm
CYL DISPLACEMENT - 29.66567681 in, 486.2204429 mm
NO. OF CYLS - 4, 4
ENGINE DISPLACEMENT - 118.6627072 in, 1944.881772 mm
HEAD GASKET DIA. - 3.357 in, 85.26797054 mm
HEAD GASKET THICKNESS - 0.03 in, 0.762001524 mm
GASKET VOLUME - 0.265894197 in, 4.35800589 mm
CYLINDER HEAD CC - 42.5, 42.5
PISTON DOME CC - -11
PISTON TO DECK - 0.005 in, 0.127000254 mm
EFFECTIVE VOLUME CC - 53.80910083
COMPRESSION RATIO - 9.036026162
DECK HEIGHT - 8.3215 in, 211.3665227 mm
CON ROD LENGTH - 5.429 in, 137.8968758 mm
COMPRESSION DIST. - 1.181 in, 29.99745999 mm

Here is a word document of what I have and don’t have so far too.

http://www.geocities.com/rcnacura
Then click on b20list.doc

archivethis

2

I hope to add my dyno sheet here this weekend.

3

those are pretty impresive.

4

Can you give anymore details about Shane Thompson’s setup? Did he have an intake and what kind of an exhaust does he have? If the exhaust is custom do you know what size piping he used? Stock ECU? Thanks for the plots.

5

I’ve been trying to search for Val Berechet’s website, but still no luck. Maybe someone else knows it? I’ve seen it before, but don’t know/remember its site address.

Oh the sites I got this info from are

www.autocrossing.com/misc/dynocharts/dyno.html
and
http://www.donkeymotorsports.com/CRVbuildup.htm

note, the b20 stats are using at b18c5 head, and he bored it out to be 84.25 instead of the stock 84.00mm bore. Someone correct me if I’m wrong.

6

Nice charts, i’ve been looking for stuff like that.

d

7

I thought you’d like that daver.

I finally found out the stock head gasket thickness, which is the .76 and everyone always asks me why I would use the copper gasket instead. Well the copper gasket is 0.43mm thick, which makes it the easiest way to increase CR without milling the head or puttin high CR pistons. Now the part is trying to figure out the CR using stock b20z pistons and rods with a b18b head and the .043mm copper head gasket.

8

Originally posted by rcnacura
[B]I’ve been trying to search for Val Berechet’s website, but still no luck. Maybe someone else knows it? I’ve seen it before, but don’t know/remember its site address.

[/B]

http://www.hxpower.homestead.com/

9

that guy went crvtec now.

times

10

ARCHIVETHIS

11

that guy only gained 0.1 seconds when he switched from a b18 to a b20… not very impressive.

12

Originally posted by notecLS
that guy only gained 0.1 seconds when he switched from a b18 to a b20… not very impressive.

i’m guessing he was having b20 traction problems based on his mediocre 60’/330’ (with a .33 reaction…?) compared to the b18, and then he does end up a few mph faster at the finish.

I mean it must be a pretty light car if he could pull a 15.0 with an ls engine…

d