B20vtec dyno figures

[Edgeauto]

nice figure man for a stock bottomend wat injector size r u running???

Standard fuel system, the only mods are what has been listed in the first post. BTW cheers for the cams

[ECU-MAN]

nice result.

was fun listening to it on the dyno

[tinkerbell]

here a re a few of my B20VTEC charts i have had over teh years...

engine 1
April 2003


July 2003



January 2004


Engine 1 ran 13.75 @ 101MPH at WSID in an LS integra

engine 2

August 2005


October 2006


Engine 2 ran 14.5 @ 96MPH at WSID in a VTiR integra

Engine 2 has just had (in late 2006) the valve seats re-cut by an advanced multi-angle cutter - it has not been dyno'd since that rebuild.


basic specs of both Engine 1 & 2 (some brands different, but virtually same engine):

engine 1 - B20B3 Block
engine 2 - B20B8 block
B16A Head
ARP head studs
ARP rod bolts
enlarged piston reliefs
CTR camshafts
CTR valve springs
Toda adj. cam gears
ITR intake manifold
stock 60mm VTiR throttle body
stock VTiR intake pipe
K&N air filter
JDM 4-1 ITR headers
2.5in cat converter
HKS superdragger catback
walbro 255 EFI pump
Prelude 340cc injectors (P&H)
Toda 4.1kg flywheel
VTiR gearbox
Sard adj. FPR
Apexi VAFC

[tinkerbell]

edge auto - can you post a "motive force" graph too please?

[Edgeauto]

edge auto - can you post a "motive force" graph too please?

Sorry i dont have a print out of it only the max reading on the 1 already posted. Did you find the B20B3 and B20B8 had different pistons cause we're using a B20B8 block and everything we read said it had dished piston with a 8.8:1 compression but its got flat pistons and about 10:1 compression

[tinkerbell]

OK, thats cool.

yeah, the B3 has less CR than the B8

using this:

http://www.c-speedracing.com/howto/c...c/compcalc.php

my calc is that the B3 motor i had was 9.7ish:1 after head shave

my calc is that the B8 motor i have is 10.2ish:1 after head shave

[tinkerbell]

but are you running a PR3 B16A head or P72 B18C head?

B18C P72 head adds ~0.2 CR

[tinkerbell]

and what EMS are you running?

[Edgeauto]

I did the calculation and it worked ours to 863lb of max motive force. We are using a P72 head, we also worked our to be about 10.5:1 so that sounds correct, copmression is 210psi in all cyl. We are using cromepro . Thats a pretty cool calulator

[xxx26e]

hey i was intertested in installing a B20B3 long motor into my dc2. Is it worth it?

[tinkerbell]

if you have a VTiR - you already have the VTEC head... so you could do a B20VTEC very easily and yes, it would be worth it...

the performance gain of using the B8 block over the B3 is minimal... but if both are the same price, get the B8 for sure...

[tinkerbell]

but if you just wanna do the B20B non-VTEC, i would say no - as you already have a more powerful engine in your engine bay...