Hey, I'm looking to have a project this summer and I'm thinking of getting an old CRX SI and putting a D15B into it to make a fuel economy monster. Can somebody tell me the feasiblity of this project and tell me how crazy it sounds. I'm also wondering if I can reuse the CRX tranny since my engine shop has a nice deal on just the D15B motor w/o tranny. I have tools and a reasonable level of mechanical aptitude. Give me a good idea of what this might cost me in addition to the motor and tranny.
I love your site

Thanks,
Sloan

 

Yes it is a very easy and feasible project. I would try to find an HF tranny so that you can get good MPG. Price is going to vary and you can reuse your tranny.

 

im interested in this too...

i have a 1989 CRX SI and it needs a new engine, tranny, ecu, and well all of it..the shell is perfect..and all the wiring is there...

i heard these engines are peppy....close to a D16a6 or what?

also, how much wiring is involved...and would i be better off just getting the DOHC ZC....which would get better milage (approx. here) and which is more reliable....which would be cheaper (installation, product, and material)

the biggest thing is reliability and practicality...

i want it an easy swap and to run great...


anyone that has the d15b please comment...and people with the zc...

 

i just swapped the dx motor in my 89 out for a d15b vtec... so far with some rather hard driving im getting about 32mpg... stock it was getting 40....

 

yeah but isn't your car alot faster now :-D HP doesn't come for free

 

yeah a good bit faster... i added a ton of weight as well so it negates some of the benefits

 

i just did the d15b swap about 3 months ago and i love it. it cost me a total of approx. 1200-1400 dollars, but i put a brand new clutch and flywheel, timing belt, water pump, cam seal, crank seal, rear main seal, valve cover gasket, cap and rotor, and plugs. it runs great for a daily driver and gets 32-35 mph with a si trans. i reused my stock tranny and got a harness from rywire.( for them). if your looking for some serious power, look else where. but if you want a reliable daily driver thats rather peppy, id recommend it.

ans some eye candy

 

I love the D15b, i keep up with my friends B18 until 4th gear, damn his GSR tranny. Good gas mileage and only cost me about $450 Only thing u really have to do is either convert to OBD1 or get an OBD0 dizzy and hack the mounts to fit the head and chip your ecu for vtec.

 

i had a d15b in my crx ran ok preaty good for a single cam. it cost me about 500 bucks excluding the ecu. wiring isnt tuff at all just buy a obd 0 to obd1 jumper harness. and rewire your dizzy. good luck man.

 

Im finally burning into the 93 octane.. BIG improvement....

 

sorry to bring this question up again, but are there anything about a first gen crx that would make this swap especially difficult?
(I got a CRX DANCE DANCE DANCE DANCE)
(I got a CRX)
-Sloan

 

Yea the D15B in tthe crx is feasible. I am running my on a p28 and it runs nice. Just rewire the distributor and use a crx tranny. also get the odb conversion harness. I bought mine from jdmshit.com.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4dr93civic &raquo;</TD></TR><TR><TD CLASS="quote">Yea the D15B in tthe crx is feasible. I am running my on a p28 and it runs nice. Just rewire the distributor and use a crx tranny. also get the odb conversion harness. I bought mine from jdmshit.com.</TD></TR></TABLE>

fyi it would run better and get better milage with a p08. unless you have a p28 chipped with p08 timing and fuel maps

 

sounds awesome! though when I goto jdmshit.com the 0-1 conversion harness is only for 88 year and up and I have an 87. is there anything i should search for to get more information? the engine i'm looking at includes the stock ECU. is the P08 the stock ECU for the D15B? Sorry for being a newb but thanks again for the prompt replies.

 

now you tell us its an 87 lol

 

Even though I drive an accord, I love EF's. And threads like this are why there are many alot of options, plus its cheap which is what i like since I'm one cheap ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ZenBearClaw &raquo;</TD></TR><TR><TD CLASS="quote">sounds awesome! though when I goto jdmshit.com the 0-1 conversion harness is only for 88 year and up and I have an 87. is there anything i should search for to get more information? the engine i'm looking at includes the stock ECU. is the P08 the stock ECU for the D15B? Sorry for being a newb but thanks again for the prompt replies.</TD></TR></TABLE>

The P08 is the stock ECU for the JDM D15B VTEC motor. Being that you're talking about a First Generation CRX, you've got a little more work to get the motor in there, but I know very little about that.

 

i have the same swap... i get an easy 37 mpg & 40 (when i baby it) on 93... w/ this motor u get much better mpg when u run 93

but i do have one question... what are u guys idleing at? my idle is REDICULOUSLY low... i mean could be 200 rpm... i am constantly afraid of stalling... its practicly on the bottom line well below the 500 mark...

also i have a wire that is cut from my thermostat sensor & dont know where it goes... i cant find anyother wire, but where would it go... i
m pretty sure it has to do w/ my fan, cuz it doesn't turn on

 

mine just dosn't idle at all, i mean it does but i wonders around all the time. its kinda annoying but i got used to it

 

You guys need to both adjust the idle screw (flathead screw on the top of the throttle body) and clean your IAC motor, the big valve body on the back of the intake manifold that has two hoses going into it from the bottom. Remove it, clean it. Replace it if the rubber looks cracked. Use hondabond and make a new gasket for it. Your idle should be perfect after that. (barring any bad programming you may have done)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigcalidave &raquo;</TD></TR><TR><TD CLASS="quote">You guys need to both adjust the idle screw (flathead screw on the top of the throttle body) and clean your IAC motor, the big valve body on the back of the intake manifold that has two hoses going into it from the bottom. Remove it, clean it. Replace it if the rubber looks cracked. Use hondabond and make a new gasket for it. Your idle should be perfect after that. (barring any bad programming you may have done)</TD></TR></TABLE>

i did adjust it and clean the iac but it still wonders. i think the iac is bad. ive been thinking about stealing my moms off here 95 dx, but im to lazy

 

does anyone still have thier directions on how wire it, i cant find anything
been to pgmfi... searched... searched on h-t nothing... all i need are the pin outs & stuff like that i want to get this fan going today

 

http://www.d-series.org/forums...nouts

or order a harness from rywire thats where i got mine