OK, here is the story: A person calls me up and says "I've got a deal for you!" Turns out someone is selling a DOHC F-series JDM motor, so the only motor I think it could be is the F20B.......it has Arias pistons, crower rods, micropolished crank, block and head (block isn't sleeved).....but I can get it for a pretty killer price (rods and pistons are brand new)....here are my questions:

How similar is this motor and the H22A1?
Are the heads the same? Will the F20B head bolt up to an H22A block and vice-verse?
What is the difference in the blocks?
Are the F20B rods and the H series rods the same? Are the blocks the same bore?
I'm pretty sure the cranks are different, what are the differences?
Can someone point me to a place I can get info on this motor?
Does the F20B have the same FRM lining as the H series?

I need this info ASAP because if this is a good deal I have to jump on it......
THANKS!!!
Brian

 

It's non-VTEC....likely the JDM F22B DOHC....

F series motors have an 85mm bore...so how did he get Arias Pistons 85mm? And how is he running forged pistons without sleeves? Actually they are steel bores so I guess it's possible...

Anyways it's likely and F22B...an H23 with a smaller bore, nonvtec..same length rods as an H23...

F20B rods are a fair bit longer than H22a rods...

 

Did you try searching for some of Satan's threads?? (I realize the archivie search is disabled, but I think I saw that thread come back to life the other day.)

He covered alot of that in his build-up post..

If not.....bump for j00

 

I didn't end up using the F20B stuff, but yeah U can tell you anything about it

 

No, I'm positive it's an F20B because he said it's nearly identical to the H22......he also said it's DOHC VTEC, so it couldn't be the F22B.......

From what I've read so far, the F20B head is the same as the prelude type-S head, is that correct?

The arias pistons and crower rods are brand new, something tells me this person didn't know what they were doing and got rods/pistons for an H22 thinking the motors were the same bore.......I'll be checking everything out tomorrow so I'll definately have more questions then....

If I get this motor, can I have it resleeved with an 87mm (or maybe larger bore) and use prelude pistons on the crower rods with the F20B crank? I might try to borrow a friends camera and take pics of stuff.....

My tranny and everything will bolt up perfectly right? I think I read something about the F20B crank pulley being different? Also, do those motors use a manual or automatic timing belt tensioner?

Do you have any good online references for this motor? I'm trying to find as much as possible about it so I know what I'm dealing with Also, I think he said it's open deck, does that sound right?
Thanks!
Brian

 

The F20b is the Accord Sir-T it will directly bolt in for the 92 up preludes, but it has obd2 ecu

 

Yes, the F20B crank pulley is different. This is because the F20B has electric power steering (so there is only one belt on the crank pulley).

I believe the head and block are from the same cast as the H22 motors. The ports are significantly smaller, etc. but there is a <U>ton</U> of room to open up both the intake and exhaust side.

I'll do some digging, but I have an F20B at a shop a work at right now...so I can check on most things u need to know.

 

Thanks XES!

So what I'm thinking is sleeve the F20B block with an 87 or 88 mm bore and run some 9ish:1 compression prelude pistons on some F20B crower rods using the F20B crank.......then I can get the head ported to hell and back and it should be a pretty decent boost motor (good displacement, good rod/stroke ratio)....I'll sell the type-S spec cams from the F20B head (if it does indeed come with these cams) and either get some stock prelude cams or some crower turbo cams, slap a new crank pulley on it, put my turbo setup on there with a nice 60-1, and make some pretty decent power.......I'd bet with springs and retainers I can wind it to 9000ish and do alright.....
Any comments?
Tomorrow will be the judgement day I guess....see if this stuff is for real or not
Brian

 

Yeah talk to ZDVS1 on PreludeOnline or maybe here...I sold him my F20B stuff for the same kind of turbo stuff...

If you're saying he bought the wrong stuff and didn't install it that's cool cause I don't know how they could put the pistons in...I'm pretty sure you can't bore it past 85mm cause there is no frm....

The motor is an Open Deck OBDII, and yeah like XES says the crank pulley has no power steering piece to it..but if someone was running it they may have just swapped an H22a one on.

The F20B internals are tough..the rods are built race style with no studs and bolts, just screws and threads machined into the rods. The F20B crank makes peak power and torque up high, so it sounds great for a great spinning turbo motor. You can sleeve it using darton t-top race sleeves or something...take a look at the Type-S head, and see if the combustion chamber was resized for the 85mm bore, but other than that I can't think of anything off-hand...

Being a 98+ block it also has larger 55mm crank mains, and the F20B has the same rod bearing sizes as the B16A

 

So where do you guys find info on this motor? I've searched the web and the best I've come up with is an excel sheet that lists the rod length as 145mm, is that right?
Brian

 

it's a little bit less than that but close...what do you want to know about it?

 

Well, it's as I figured and the person who told me about it didn't know what the f&%K they were talking about......they had told me f-series, JDM only, DOHC VTEC so I figured it had to be this motor.....

Turns out the motor is a USDM f22 out of an accord Damn ignorance for getting my hopes up!!!

Buuuuttttttt........they were selling some damn nice crower rods and some kind of forged pistons (said they were arias, but I have no idea and no marking on the pistons)......she said the machine shop told her they had to bore out her f22 to fit the pistons, so I'm figuring they might be prelude pistons with an 87mm bore? Are f22 rods the same as h22 rods? I think I can get a killer deal on the rods and pistons, and they're brand new so all might not be lost...

Why someone wanted to build up an F22 motor I'll never know
Brian

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Firedrake &raquo;</TD></TR><TR><TD CLASS="quote">Well, it's as I figured and the person who told me about it didn't know what the f&%K they were talking about......they had told me f-series, JDM only, DOHC VTEC so I figured it had to be this motor.....

Turns out the motor is a USDM f22 out of an accord Damn ignorance for getting my hopes up!!!</TD></TR></TABLE>

BUHAHAHAHAHAHAHAHA!!!! Sorry, but I was following your thread since it first came up and waiting on this...LOL! But sorry for all your troubles...


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Why someone wanted to build up an F22 motor I'll never know </TD></TR></TABLE>

You better not let Bisi hear you say that...can you say 300whp All motor F22?! WHAT?!!

 

Yeah, it's the old adage: If it's too good to be true, it probably is!

Bisi built the f22 because he wanted to be on top with a SOHC and non-vtec, so he needed the displacement......I'd wager that barely anything on that motor resembles a stock f22 motor anyways. If you have enough money, anything is possible!
For the average joe-schmoe building your typical stock-head/rods/pistons/sleeved honda motor for boostin, they'd have to have JUST finished smoking crack to want to build an f22, when they can start with an infinitely better platform for around a grand.......it's just like the D versus B series....
Brian

 

dont we always talk about stuff like this. interchangable parts on honda motors.... hmmm. i dont know about internals and all the specs, but i do know that heads and blocks from different series motors dont match up.