Bense

F20B
Accord/Troneo Sir and Sir-T (CF4) (JDM)
197hp@7200/145tq@6600


85mm bore
88mm stroke
145.5mm rods (f20b rod length = 145.425)
1.65 r/s ratio
55mm mains like h22a4 block
rod journal has been offset ground on both sides to the size of a b-series rod journal.
11.0:1cr
smaller, b-series rod journals
beefy rod, like a s2000
23mm wrist pin

exhaust manifold = H22
intake manifold = h22
dizzy = h22
timing belt = unique, uses 156 teeth, you can use a h22 one. (see below)
waterpump = h22
Oil Pan = F23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HeikDiesel &raquo;</TD></TR><TR><TD CLASS="quote">
Belt that came with my f20b from h-motors
14400-PCB-004 Teeth count 156
New H22 timing belt part number
1400-P13-003 Teeth count 155</TD></TR></TABLE>

Engine is a mix between the H22A4 and F23

Misconceptions about the F20B:
1. It does NOT come with a single stage intake manifold. That is found on the H22A7 European Accord type R. For everything that you'd ever want to know about that intake manifold click here:
https://honda-tech.com/zerothread?id=1960750

2. It does NOT have type S cams. It is believed that it has the same cams that are found in the JDM H22.
EDIT, 09/11/07: Manual version has type S cams, Auto Version has regular H22 Cams

3. Most engines will be from the automatics which have a smaller tb and weaker camshafts.

F20B Dizzy wiring
https://honda-tech.com/zerothread?id=1957852

Specs of other honda ~2 literish engines for comparison
B20Z = 146hp, 133tq
F20B = 200hp, 145tq
F20C = 240hp, 163tq (JDM)
K20R = 220hp, 158tq (JDM)
H22A = 200hp, 161tq (JDM)
H22S = 220hp, 163tq (JDM)
H23A = 160hp, 156tq
H23VTEC = 197hp, 163tq
k20a2 = 200hp @ 7400, 142tq @ 6000

A few random pics of F20Bs that I've found








A few pictures I took of a F20B













More info to come

HeikDiesel

Some water pump and timing belt info.

Belt that came with my f20b from h-motors
14400-PCB-004 Teeth count 156
New H22 timing belt part number
1400-P13-003 Teeth count 155

Water pump part number
19200-P13-003 (Comes with mounting o-ring)

Only ID numbers that I was able to find on both the new and the old pump was "26T P13"


Modified by HeikDiesel at 11:36 PM 6/19/2007

Bense

how many teeth are on those belts?

SIXTY

Are the sleeves iron or frm?

HeikDiesel

Iron sleeves, Ill count the teeth tonight

Edit....I was very wrong. Old belt has 156 teeth, new has 155 Fixed info


Modified by HeikDiesel at 11:33 PM 6/19/2007

skunked

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HeikDiesel &raquo;</TD></TR><TR><TD CLASS="quote">Iron sleeves, Ill count the teeth tonight
Modified by HeikDiesel at 11:33 PM 6/19/2007</TD></TR></TABLE>

you sure about that? I could have sworn they're FRM.

HeikDiesel

Not sure, but everything I read said there were iron. Any way to check that skunked?

Bense

jdogg will know. he's got one of these things sitting right beside him every time he gets online

HeikDiesel

Well I have mine sitting right here...how would I check it? Magnet?

skunked

I'm almost positive it's FRM. If they were Iron those blocks would be gold, and they're not

HeikDiesel

not saying everyone is right skunked but they are saying iron across the board

skunked

Your right, it's a small bore (85mm) Iron sleeve. I was thinking type S




Modified by skunked at 4:55 PM 6/21/2007

mgags7

Nobody mentioned it, but the valves are B series size in a head that is otherwise very similar to the H22 head.

Matt, he's right, the sleeves are iron, no frm here.

HeikDiesel

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skunked &raquo;</TD></TR><TR><TD CLASS="quote">Your right, it's a small bore (85mm) Iron sleeve. I was thinking type S


Modified by skunked at 4:55 PM 6/21/2007</TD></TR></TABLE>

Cool I was right for once lol

ImportechPerformance

So just to clear some issues up on another forum. On the F20b's does it actually have that stamped on the block (I believe they do)? Or does it still have H22 stamped (which makes no sense to me).

Gracias!

Bense

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ImportechPerformance &raquo;</TD></TR><TR><TD CLASS="quote">So just to clear some issues up on another forum. On the F20b's does it actually have that stamped on the block (I believe they do)? Or does it still have H22 stamped (which makes no sense to me).

Gracias!</TD></TR></TABLE>

Just be like "PWNED BY THE IMG"

ImportechPerformance

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">Just be like "PWNED BY THE IMG"
</TD></TR></TABLE>

Ahhh! I knew it!

Bense

just added a link to the f20b dizzy wiring schematics

atlplayer4life90

hey on the back of the block there is a neck for a hose near the water pump where does that go on the car, sorry i dont know how to add a picture if u could help with that also thanks

skunked

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by atlplayer4life90 &raquo;</TD></TR><TR><TD CLASS="quote">hey on the back of the block there is a neck for a hose near the water pump where does that go on the car, sorry i dont know how to add a picture if u could help with that also thanks</TD></TR></TABLE>

off the water tube? It goes to the heater core.

atlplayer4life90

thanks skunked for the help any idea on what i do about a dist. i have a obd2b ek and a obd1 h22

atlplayer4life90

and the upper plug above the oil filter that is the knock sensor right

Loco-B

bump for the awesome info!

i'm putting one into my CD7 as we speak!

XES

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">Misconceptions about the F20B:
2. It does NOT have type S cams. It is believed that it has the same cams that are found in the JDM H22.
</TD></TR></TABLE>

I am going to have to disagree with this comment. I have had 2 F20B motors and am currently using the F20B cams in my car. I spec'd them and also degreed them in the past. They match up IDENTICAL to the H22 Type S cams listed on the Crower site.
http://www.crower.com/cat/impo...shtml.

Normal JDM cams have the same lift, etc as normal USDM cams. I have dynoed both cams on my motor and F20B cams have much more lift and different duration and ramp angles than normal H-series cams. Here was my dyno comparison: http://www3.telus.net/public/unrynhen/camdiff.jpg

HeikDiesel

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

I am going to have to disagree with this comment. I have had 2 F20B motors and am currently using the F20B cams in my car. I spec'd them and also degreed them in the past. They match up IDENTICAL to the H22 Type S cams listed on the Crower site.
http://www.crower.com/cat/impo...shtml.

Normal JDM cams have the same lift, etc as normal USDM cams. I have dynoed both cams on my motor and F20B cams have much more lift and different duration and ramp angles than normal H-series cams. Here was my dyno comparison: http://www3.telus.net/public/unrynhen/camdiff.jpg</TD></TR></TABLE>

Im curious as to what size TB's are on both of those engines