ok, I am still working on that prelude dillema, and two ludes later, I just want to know what type of engine this is. WIll a BA20 from my 89' fit in this 93'?

Thank you so much!

 

No it wont fit in the 4th generation Prelude. The b20a is a special B-series engine that is different than any other b-series because it's designed to tilt back 18degrees to clear the 3rd gens really low hoodline.
The 4th gen Prelude doesn't even have B-series engines, even though the H23 might have an identical vlave cover, the only thing the H23 shares with the B20a5 is the connecting rods, that's all that i'm aware of. So no, it wont fit. Sorry man.

 

Why would you want to put a b series in a 93 anyways

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by md23vtec &raquo;</TD></TR><TR><TD CLASS="quote">Why would you want to put a b series in a 93 anyways</TD></TR></TABLE>

Exactly.

 

it's probably pretty cheap. unwanted and cheap. at least the original post starter had enough sense to ask or find out if it'd fit. but really, everyone here pretty much has VTEC of some sort, or are dreaming of a badass some sort of built F/G/H23, whether boosted or experimenting with NA, but can anyone really imagine what it must be like to drive a 4th gen or later, and ONLY have like, 120 HP and less TQ to move ALL that car?

 

OK, thank you for replying, but I am still, well... confused.

I have a brand new, refurbed engine from an 89 SI, The car is totaled, so I wanted to salvage the engine.

I found this car, the one in the picture, and I wanted to put my old one into it. I thought that my 89 SI is a BA20, and that it was the same one as in the picture, which I think is a 93' SI.

If they are not the same engine, which one is better. They look the same to me.
Please dont use slang to explain this to me, b/c I cant talk the talk. Sorry

I just want a working car, and if it was really fast that would be great 2.
Thanks again.

Pictures

OLD CAR (89 SI)


NEW CAR (i think 93, but definitely SI)

 

Not trying to ***** my car or anything, but this is an H23, which is what would be in a 92-96 Si



I wouldn't mess with a Prelude B-series engine; there's not many parts for it and they're not Honda's most reliable engine...

 

let me put it this way... What year is the NEW CAR?

I really do not know, but that picture at the top of the thread is of its engine.


------------edit:
ALSO, is the 89 actually a BA20, you guys know a lot more about it than I do.


THanks

 

maney is also an issue here, I just started college, so I dont have as big a budget as you guys want me to have. I know that I would rather have an h23, but this is what I got, so that is what I can work with . THanks

 

Most honda motor are reliable but there is no purpose to put b series in 92-96 that car wont move not enuff torque just my 2cents

 

The latest year your new car could be is a 91. I'm not a 3rd gen expert, so don't ask me details, but it's definately 88-91

 

That new car is absolutely not a 93, or even a 92 for that matter. They are both 3rd gen Preludes, so the motor should fit no problem. I'll leave any details to somebody who knows much more about them than I.

 

Great! thats pretty much just what I wanted to hear.

Thanks so much, f any one else has anything they want to let me know before I start doing this, please do, I am all ears, thanks.

 

Well your "new" car is a 3rd generation Prelude, and by the taillights I can confidently
say it's either a 1990 or 1991 Prelude Si, and they have the B21a1 engine, this is
the 2.1L engine with 140hp. But the engine that is in the crashed Prelude which is either
an 1988 or 1989 has the b20a5 engine, that is the 2.0L 135hp engine. These
engines can be swapped in place of eachother, they are perfectly compatable with eachother.

The thing is, what type of transmissions is in the crashed Prelude and tell me what
tranny is also in the new prelude, a manual or automatic? If they both are manual
then you have a choice of which transmission to choose. The new prelude has a
transmission with shorter gears, which means a tad bit more acceleration but at
highway speeds it causes the engine to rev at a really high 3800-4000rpm. If the
crashed Prelude is a 1988 that has a manual transmission, then you can use this
transmission as well. You would want this transmission if you do a lot of higher speed
driving. With the 1988 transmission it's geared taller so you will lose a bit of
acceleration but on the highway in 5th gear the engine only spins at around 3400rpm,
maybe a bit lower. This is great for MPG and a quiet highway drive, I would probably
recommend this for a daily driver. If the crashed car is an 1989 Prelude 2.0si, that
transmission is different than both the 1988 and 1990-1991 manual transmissions,
the 1989 manual transmission is the sweet middle, so you will run a bit higher rpm at
highway speeds but you will get a bit better acceleration than the 1988, but a bit less
than the 1990-1991 transmission. So if the wrecked prelude is a 1989 model, then
you can use that as well if you want a bit of a compromise between drivability and
performance.
But since your new prelude is a 1990 or 1991 model, if you choose to swap out the
new preludes transmission and drop in the wrecked preludes transmission, the
1990-1991 Prelude models have thicker front axles so they will not be compatible
with the wrecked prelude's transmission. So you match the axles and the
clutch/flywheel to the transmission you use. Even though 1988 and 1989
transmissions have different gearing, they are basically the same, they use the same
clutch and axles. So wheather you choose the "1988-1989" or "1990-1991"
transmission, you have the match the axles and clutch/flywheel to the years. This is
extra info, but seriously consider this while you are changing the engines since it's
easier to do all the work once rather than do it twice.

When you put the b20a5 (wrecked lude's engine) into the 1990-1991 new Prelude
(that prelude has the b21a1 in it) you will have to take the intake manifold assembly
and exhaust manifold assembly from the b21a1 and use them on the b20a5. When I
mean the "intake manifold assembly" I mean EVERYTHING that is with it, the EACV,
the throttle body, the FIV, ect... And the reason you have to use the b21a1 manifold
assembly is because it has a different style oxygen sensor system that only uses 1
oxygen sensor that is electronically heated (It's a 4-wire sensor) and it's located on
the downpipe. The wrecked lude's b20a5 uses a dual oxygen sensor system which is
basically 2 regular style oxygen sensors on the exhaust manifold and you dont want
to use that with the new prelude. Good luck, any more questions, dont hesitate.

If you want a shitload of information, search on
http://www.PreludePower.com under the
3rd generation forum and you will find a goldmine of information.

 

fux0red

 

You the scary thing about the 3rd gen Prelude's is their Crash test ratings. The drivers side only has 1 star, the worst rating a car can get. It's a death trap to the driver, and the passenger has 3 stars, which is decent but nothing to boast about. The older 2nd gen Prelude's are actually safer than the 3rd gens, go figure.

 

the JDM shape came out with those models in 89
dont know bout usa tho

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by americ_ian &raquo;</TD></TR><TR><TD CLASS="quote">the JDM shape came out with those models in 89
dont know bout usa tho</TD></TR></TABLE>
The JDM 3g ludes came out in 1987, and the USDM 3rd gens came out in 1988.

 

Yo: thanks man, the wrecked one is an 89' SI, and the new one is a 91' SI. They are both manual transmissions. I plan to keep the 91 transmission in the 91'. I am putting the 89's manual transmission in this totally separate 88' that I have. yes, three 3rd gen ludes.

Thanks for more input. What was all that about the intake manifold again?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totalude &raquo;</TD></TR><TR><TD CLASS="quote">Yo: thanks man, the wrecked one is an 89' SI, and the new one is a 91' SI. They are both manual transmissions. I plan to keep the 91 transmission in the 91'. I am putting the 89's manual transmission in this totally separate 88' that I have. yes, three 3rd gen ludes.

Thanks for more input. What was all that about the intake manifold again?</TD></TR></TABLE>
Ok, so you have the 91 Prelude Si, that is the only 3rd gen Prelude that has an OBD-1 ECU, if you dont know what that is, it's the engine computer. The 1991 Prelude Si only comes with the b21a1 and the b21a1 has a different intake manifold setup than the B20a5 in the other Preludes, even though they might look the same, they aren't. The b20a5 intake manifold has a secondary intake runner setup, so at high rpm a vacuum switch opens up the butterflies in the short length runners in the manifold, you don't need this, it will most likely cause problems because the b21a1 car was never intended to have these, the ECU might not compensate for the extra sudden airflow, and I'm not even sure the OBD-1 ecu in the new Prelude even has the ability to open them via vacuum switch.
So enough of the vague details, what i'm tryin to say is, simply use the b21a1 intake manifold assemblly, it's a single runner design, more simple than the dual-runner design and it's actually made to run with the OBD-1 Computer, so it would be a wise choice to put the b21a1 intake and exhaust manifold assemblies on the b20a5 engine. That's all...
Good luck

 

OK, I think I understand, what you are saying is that I should just leave the intake manifold that is in the 91 inside the 91, right. And just use the engine from the 89' nothing else.

right?

 

Damn, your car took it from both ends y0!

j/k, sorry to hear about ur ride, but like everyone else is saying, it would be a pointless swap. If there is something wrong with the original h23 (the motor in the 93), then you should either find a used 4th gen motor to swap in or build the blown one.

Either way stick to a motor that uses the stock mounts otherwise you may be bitting off more than you can chew...

Good luck

p.s Fourth Gens own all other preludes !

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattmw88 &raquo;</TD></TR><TR><TD CLASS="quote">p.s Fourth Gens own all other preludes ! </TD></TR></TABLE>
Phfffffsph!!!!! PFFFFFT! lol....4th gens might have the most potential but the 3rd gens handle the best

 

I dont think that guy actually read anything in the post, b/c we later decided that its was not a 93 at all. And I think that the 3rd gens are my personal fav, i have three, but 5th gens rocks my world. heh, but really, i like the fith the most.

any, real quick, car boy, its that all I have to do?

Hey car boy: are you like the starter of PreludePower.com?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totalude &raquo;</TD></TR><TR><TD CLASS="quote">And I think that the 3rd gens are my personal fav, i have three, but 5th gens rocks my world. heh, but really, i like the fith the most.</TD></TR></TABLE>
Yep, 3rd and 5th gens are my favs as well...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totalude &raquo;</TD></TR><TR><TD CLASS="quote">any, real quick, car boy, its that all I have to do?</TD></TR></TABLE>
Basically that's about it in a nutshell...You might want to look over the engine before you swap it, because if you need to replace anything on the engine, such as oil pan gasket, crank seals, resurfacing flywheel or thrust bearing replacement, you know, anything that might cause you trouble, if it's in question, replace it. Other than that pre-install inspection, youre ready to go.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totalude &raquo;</TD></TR><TR><TD CLASS="quote">Hey car boy: are you like the starter of PreludePower.com?</TD></TR></TABLE>
Lol not even close! I'm just a normal retard member on there, Dave is the Admin and founder of the PreludePower.com community, his name is hondaprelude88 and he's got a pretty quick daily driven turbocharged 3rd gen....PP.com is basically the safe haven for all 3rd genners...