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Old 02-27-2002, 09:32 PM   #1 (permalink)
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DOHC F20B VTEC vs. H22 VTEC

I was looking some pic of Japanese Accord SiR and SiR-Ts, and one pic showed an engine with a blue valve cover that had DOHC VTEC plastered on it and "F20B" stamped on the block.
The S2000 supposedly uses an F20, too, but I'm wondering what the difference in performance, design, pros and cons between the F20B and the H22 are...
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Old 02-28-2002, 03:02 AM   #2 (permalink)
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sirt is a destroked h22a...
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Old 02-28-2002, 06:19 AM   #3 (permalink)
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the f20b has slightly less torque and has to rev higher to make the same power.
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Old 02-28-2002, 04:35 PM   #4 (permalink)
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the f20b in the accord is a dohc non vtec.....after 96 some of the sir-t's had two different series motors...one was a f20b and the other was an h22a1..before 96 the accords only came with the f20 in japan..in the us they only came with f22a1 sohc non-vtec, f22b1 sohc non vtec and f22b5 sohc vtec. and v4lu3s is right with torque and revs. the f20b was a road course engine that had hier revs and lower torque, this way they minimized whell spin when downshifting out of the corners. in japan all the f and h series motors had dual balance shafts except the h23.
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Old 02-28-2002, 06:06 PM   #5 (permalink)
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http://asia.vtec.net/article/CF4/

But in this one, they show an F20B that says "DOHC VTEC" on it, and that's why I'm asking...
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Old 02-28-2002, 06:21 PM   #6 (permalink)
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Doesnt look or sound right...I'll do some more research and get back to you...
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Old 02-28-2002, 06:36 PM   #7 (permalink)
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I was rubbing my eyes too. It's purdy wierd...also is it possible to convert a USDM Accord front clip to the CF4 front clip?
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Old 02-28-2002, 06:51 PM   #8 (permalink)
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i am pretty sure the f20b dohc did come in a vtec model...it came in the sir-t accord and put out 200hp...they sell em at www.jdmclub.com as a matter of fact...
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Old 02-28-2002, 06:56 PM   #9 (permalink)
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Im begining to think your right...im checking up on it though..I could have sworn the f20b was dohc non vtec....
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Old 02-28-2002, 07:11 PM   #10 (permalink)
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as far as i know the f20a is sohc and ranges in powr from 120-150 depending on the year, while the f20b dohc does 180 or 200 hp depending ont he state of tune.
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Old 10-17-2005, 01:10 PM   #11 (permalink)
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wow..looks like no1 here knows what theyre talkin about..to clear up everything here are the facts:

The F20A is JDM from the 90-93 Accord Si..its a DOHC non-vtec that puts out 155hp@6100

The F20B is a SOHC VTEC that puts out 150hp

The F20B1 is a DOHC VTEC that comes from the 90-93 JDM Accord Si-R and puts out 190hp

The F20B2 puts out 200hp and is a DOHC VTEC from a 94-97 JDM Accord Si-R

The F20C1 is from the S2000, puts out 240hp@8300 and is a DOHC VTEC

The F22A comes from the 93 Accord and is a SOHC non-vtec putting out 125hp@5200

The F22A1 powers 135hp@5200 is a DOHC non-vtec and comes from 92-96 Prelude S

The F22A4 and A6 are both SOHC non-vtecs and power between 130-140hp, the come from the 90-91 or 92-93 Accord

The F22B is a DOHC non-vtec with 160hp@6000 coming from a 92-96 Prelude Si

The F22B1 has only 145hp@5500, its a SOHC VTEC from the 94-97 Accord EX

The F22B2 comes from the Accord DX/LX and is a SOHC non-vtec powering just 130hp@5300

The F23A1 is a SOHC VTEC from a 98+ Accord EX/LX or CL (98-99) with 150hp..the A4 has 148hp and the A5 only has 135hp

Dont even get me started on the H-Series motors now haha..hope i could clear everything up.

-Mike
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Old 10-17-2005, 02:26 PM   #12 (permalink)
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some buddies of mine were doing a f20b into a 97 accord. it is a dohc vtec engine. alot of peopla say it is and that it isnt a destroked h22 but there are more diffs than displacement. it had been a wiring nightmare putting it into the 97 accord they got the car started and driving but it is still having a few issues. they also had an issue with the tranny i cant remember what it was though. ill see if i can post some more info on the engine.
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Old 10-17-2005, 02:45 PM   #13 (permalink)
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ask your friend it he has a F20B1 or F20B2
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Old 10-17-2005, 07:14 PM   #14 (permalink)
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the s2000 is an f20c
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Last edited by 98vtec; 10-17-2005 at 07:15 PM.
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Old 10-18-2005, 11:37 AM   #15 (permalink)
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^ yea yea LOL..you just opened my eyes up to the dam accord wagons in the other thread hahaha so yea..the wagons changed everything, now there is SUCH thing has H23A dohc VTECs AND F20B doch VTECs LOLOL
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