hey guys what up? will an ex top end match up with an lx block? cauz i gotta lead on an ex top end from a local yard and not gonna really stress it if its to much hasstle. i know i gotta do the ecu and what not but i need more power and the H22 is to much for me right now i was thinking of a rebuild with the ex head (if it works)
going to OBD1 and boosting it that should be all the power i'll need for now. the lx moto sucks but i don't thing i need to tell you all that .Plus i wanna do it myself or as much as i can myself this will be my first BIG JOB any information would help.

 

I think that the LX is the F22B2 which is a non-vtec motor.

The EX is the F22B1 which is a vtec motor. I would expect the heads and cams to be very different. You would also need the vtec solenoid oil plumbing for vtec activation etc.

I guess what I am saying is I am not sure but an LX head is probably a lot surer bet, easier and cheaper than the EX head for an LX block.

 

Yeah, and if you're gonna boost, why not just do it on an F22B2?. Swapping heads is doable, but it would cost you almost as much as the H22 swap anyways.

 

How can swapping heads cost as much as doing a h22 swap?

I just bought a complete LX block for $430 shipped. I am going to put my EX head on it, and put it in my car.

H22 is min $2300 +shipping

I doubt it will cost me ~$2k to put the EX head on the LX block.

 

Do you intend to use vtec and OBDII ecu?

 

Accord 94, you can't just change only the head and get away with it. You have a different ECU, wiring, a few more solenoids and sensors, different o2 sensor, different exhaust manifold (stock, that is), it may fit on a B1 head, but I'm not sure. different distributor also (does it come with the head?). Gaskets, and I'm not sure but maybe a different intake manifold.

Though surely a number of those parts from the B2 head would adapt to the B1 head pretty well, it could also rob you of a bit of performance. The difference between the B1 and B2 is already not a big one, I definitely don't think it's worth swapping, especially if you want to go FI.

And I mean the whole job of swapping with all the parts would be almost equivalent to the H22 alone. Now don't quote me on this though, because I have never done the comparison, but it's an estimate.

But if you are racing, Accord94, It all may be a different story, especially if you are going to add a big cam to it, then it could be worthwhile, I guess...

 

Only reason I have to do this is because my block has a nice hole in it. I will be using my obd1 ecu and having vtec since I will be using my head on the lx bottom end.

 

I am missing something,,,,,,,,, the LX motor is not vtec. The EX head is from a vtec motor. I guess I would ask some of the same questions that sauceman is. Is it reasonable to expect the vtec head to bolt on a non-vtec motor (not only the block) and work?

 

94Accord, I thought it was the other way around. It's just the bottom end you have to replace. Not a problem that I know of. All the different parts from an B2 to B1 engine are all related with the head.

97accordex, 5th gen Accords DX, LX have the F22B2 non-Vtec. EX have F22B1 Vtec.

Jeff

 

From what i've been told and read on here and other sites, all f22 bottom ends are the same, just the heads are different.

 

The control system for the vtec mechanism monitors engine load, rpm and speed and engine coolant temp.

Vtec activation occurs when:
engine speed is 2300 to 3200 rpm
vehicle speed is 6.2 mph or faster
coolant temp iss 50F of higher
engine load; judged by intake manifold negative pressure (vaccum)

The ecm kicks on the vtec solenoid which allows oil to flow and activates the hydraulic piston mechanism. Anyway, assuming that the OBDI ecu has been programmed to monitor all these inputs and then activate the solenoid, there is an oil line and return/bypass oil line from the solenoid in the head. How does the OBDI non-vtec ecu operate the solenoid?



[Modified by 97accordex, 2:40 AM 2/16/2003]

 

94Accord, I believe you're right.

97accordex, there is no VTEC solenoid on the non-VTEC F22B2.

The VTEC conditions you just described are applicable to F23 VTEC engines. They have a variable VTEC point. F22B1s have their VTEC kick in at around 3500rpm.


[Modified by sauceman, 8:08 AM 2/16/2003]

 

Of course there is no vtec solenoid on the F22B2, its a non-vtec engine.

The vtec conditions I described were quoted almost verbatim from the Honda 1997 Accord service manual in the section describing vtec operation for the F22B1 engine.

 

Oh sorry about that. I thought it was only on an F23. Maybe it has something to do with OBD2 ECU or it's same on OBD1 F22B1's too?

 

Wrong, where are you shopping? I see them for 1800 plus shipping all day!

 

Please post where this is and NOT osakajdmmotors.com please..

 

Also what all do you get for $1800?