call me crazy - odb2 F23A4 swap

[nighthawk]

this is somewhat true , unless their hp an tq numbers are close to each other then the mpg's will be better on the smaller engine... an if ur tryin to improve ur mpg's ur vtec should'nt be opening counting that it opens at 4400 rpm? you wudnt want to be shifting that high when ur trying to save gas ....
jus my $0.02

the SOHC vtec engines are basically designed for gas mileage...driving on the small lobes all the time will improve mileage over an engine that only had one set of lobes which have to provide power throughout the RPMs.

[nighthawk]

gloryaccord's idea i believe is better because the engine he mentioned will most likely flow easier since it has around the same hp&tq numbers yet it has a much better intake an exhaust flow! an then of course the tranny has a HUGE effect. a long geared tranny will probably be ur best friend, youll have less accelaration, but on the highway youll cruise in low RPM's even at higher speeds.

but can I go to my local junk yard and get a F20A DOHC for $400?

I have an accord tranny with 0.685 5th and 4.06 final drive. Lowest cruising tranny you can get bascially.

[nighthawk]

I really dont think a F20A engine would work well in a 2900 lb car with a long geared tranny. 137 lb-ft @ 5000 rpm vs 148 lb-ft @ 4800 rpm and thats only peak...i'm sure the low end torque is going to be a bit lacking on a non-vtec 2.0.

[gloryaccordy]

I really dont think a F20A engine would work well in a 2900 lb car with a long geared tranny. 137 lb-ft @ 5000 rpm vs 148 lb-ft @ 4800 rpm and thats only peak...i'm sure the low end torque is going to be a bit lacking on a non-vtec 2.0.

F20A worked fine in JDM Accords. I think the 2.0Si has our same tranny.

Unless u need a motor today I would hold out for an F20A. Though with your situation it sound like u should just get another F22. VTEC no VTEC u won't be making that much better gas mileage. We are talking 300ccs at most here.

If u wanna get better gas mileage, u need to let ur engine flow better and up the compression. But then u are spending money and time u will never get back from 2-3 extra mpg. Maybe it's time to get a Civic.

[C91BLX7]

You guys are focusing too much on engine size. A F23 should get better gas mileage because its newer. For one is newer, and being newer means newer technology.

[nighthawk]

F20A worked fine in JDM Accords. I think the 2.0Si has our same tranny.

Unless u need a motor today I would hold out for an F20A. Though with your situation it sound like u should just get another F22. VTEC no VTEC u won't be making that much better gas mileage. We are talking 300ccs at most here.

If u wanna get better gas mileage, u need to let ur engine flow better and up the compression. But then u are spending money and time u will never get back from 2-3 extra mpg. Maybe it's time to get a Civic.

F23 has 9.3:1 compression as opposed to 8.8:1. I'm not going to "mod" the engine, everything is going to be stock. The F23A1 should net me a couple mpg vs a F22 because it has effecient vtec, it will be much newer, lower miles, and a much more modern ECU. (ULEV ECU's have some extra advanced 32 bit processors) The F23A4 at a local junk yard is $400 and has 100k miles on it. That's really what i'd pay for a GOOD F22A1/4 and it would probably have more miles. I have to buy an ecu either way because I'm converting to 5-spd. So there's no extra cost there. 3 mpg actually makes a decent amount of difference in money you'd spend per year driving 20k miles and gas at $4+/gallon.

Lasty, I dont want a civic. I paid $250 for my accord and that's what I am working with.

[NorcoAccord]

F23 has 9.3:1 compression as opposed to 8.8:1. I'm not going to "mod" the engine, everything is going to be stock. The F23A1 should net me a couple mpg vs a F22 because it has effecient vtec, it will be much newer, lower miles, and a much more modern ECU. (ULEV ECU's have some extra advanced 32 bit processors) The F23A4 at a local junk yard is $400 and has 100k miles on it. That's really what i'd pay for a GOOD F22A1/4 and it would probably have more miles. I have to buy an ecu either way because I'm converting to 5-spd. So there's no extra cost there. 3 mpg actually makes a decent amount of difference in money you'd spend per year driving 20k miles and gas at $4+/gallon.

Lasty, I dont want a civic. I paid $250 for my accord and that's what I am working with.

I say go for it bro and have fun.

[nighthawk]

well I got scared of the wiring and want to get the car usable again so I went with a F23A1 will be running a 94 EX computer and distributor.

[HondaFan81]

I'm really considering dropping in a F23A4 (ULEV 6th gen accord engine) into my car and running it on the OBD2 ecu. I'm building my car for gas mileage and I really no longer care about performance. In my quest for good gas mileage why not help out the environment at the same time?

My H23A1 swap is done because of a cracked block and low mileage good condition F22's are hard to come by these days. Not so with 6th gen F23's.

The only thing I'm worried about really it getting the ecu to run all the interior items?

Why not get an OBDII to OBDI conversion harness and make it easier on yourself? Rywire and similar online support can help.

[SuperTuner12010]

[QUOTE=nighthawk;1502555]3 mpg actually makes a decent amount of difference in money you'd spend per year driving 20k miles and gas at $4+/gallon.QUOTE]

3mpg, is that all your expecting or what, im confused

[nighthawk]

3 mpg actually makes a decent amount of difference in money you'd spend per year driving 20k miles and gas at $4+/gallon.

3mpg, is that all your expecting or what, im confused

3 mpg difference....like the difference between an old non-vtec F22 and a good condition vtec F23.

[nighthawk]

Why not get an OBDII to OBDI conversion harness and make it easier on yourself? Rywire and similar online support can help.

OBD2 to OBD1 conversion harnesses are for CARS that are OBD2...not engines...it would probably make more of a mess.

but this is all a mute point as I am keeping the vehicle OBD1 now...no conversion harness needed.

[spirit7623]

well even though you're not looking to mod for " performance" you could mod for " efficiency". You all know; coil on plug ignition system with some msd caps, help the engine flow better with a good intake/header, something to really monitor and tune ( in car) the air/fuel ratio, mod the radiator cooling/thermostat to be a little cooler than stock, and something called the Singh Grooves
http://www.mpgresearch.com/forum/vie...page/Itemid,1/

And there is A LOT!! of info on how to make your engine/chassis more fuel efficient and lots of other ideas.
http://www.mpgresearch.com/forum/

[lo-specials]

I'm really considering dropping in a F23A4 (ULEV 6th gen accord engine) into my car and running it on the OBD2 ecu. I'm building my car for gas mileage and I really no longer care about performance. In my quest for good gas mileage why not help out the environment at the same time?

My H23A1 swap is done because of a cracked block and low mileage good condition F22's are hard to come by these days. Not so with 6th gen F23's.

The only thing I'm worried about really it getting the ecu to run all the interior items?

Try to put this in it for gas mileage:

http://www.smacksboosters.110mb.com/

[Leung]

well even though you're not looking to mod for " performance" you could mod for " efficiency". You all know; coil on plug ignition system with some msd caps, help the engine flow better with a good intake/header, something to really monitor and tune ( in car) the air/fuel ratio, mod the radiator cooling/thermostat to be a little cooler than stock, and something called the Singh Grooves
http://www.mpgresearch.com/forum/vie...page/Itemid,1/

And there is A LOT!! of info on how to make your engine/chassis more fuel efficient and lots of other ideas.
http://www.mpgresearch.com/forum/

care to further elaborate on this somender-singh groove? i found this http://jeremiahsviolins.com/grooves.htm after a google search but i don't quite understand the idea behind it on how it improves efficiency.