B2D Conversion for the RT4WD (scrapped - pics included)

stampernstampern Senior Wagonist
in Engine & Drivetrain
Hey guys, I had a couple scrap parts around so I decided to see how much work it would be to mount a d series tranny on a b series block. I have a b16a1 block with just a crank on it - the block is shot, so this is the perfect use for it - he he. And on the transmission, I did a tranny swap in a crx a few months back, the guy blew up the diff in it and other parts are shot too, so I pulled it apart so I could use the inner casing to test fit on the b16. I spent a couple hours on it today and was able to conclude that this won't be a direct bolt on, I'm going to have to do some cutting on the b16 block so the axle hub will go into the tranny on the drivers side. The top rear bolt lines up perfect so that's a good start and I was able to put a starter on the tranny and it clears good too, just needed to be spaced out about a 1/4 inch. Here are some pics of the first day.

IMAGE_038.jpg
IMAGE_039.jpg
IMAGE_040.jpg
Below is the top front bolt hole, it almost lines up - might be able to hone out the hole on the tranny to use this one - we'll see.
IMAGE_041.jpg
IMAGE_042.jpg
IMAGE_043.jpg
Below you can see there isn't much room for the axle, this part of the motor is going to be cut out for clearance.
IMAGE_044.jpg
Below - I'm use a d-series clutch and flywheel. 2 of the flywheel holes lined up so I'm just using those for testing. Since the b series uses an 8 bolt I'll have to figure something for that out later.
IMAGE_045.jpg
If you can see the line on the block that's how far the block is going to have to be cut for the axle to fit.
IMAGE_046.jpg
IMAGE_047.jpg
IMAGE_048.jpg
«1

Comments

  • skinnyskinny Senior Wagonist
    just do a conversion plate like they do with h2b or f2d swaps.
  • stampernstampern Senior Wagonist
    If you guys have any questions or input please let me know. I know a lot of use would love to be able to put a b series in our 4wd wagons and not have to touch the drivetrain side of things.
  • stampernstampern Senior Wagonist
    skinny wrote:
    just do a conversion plate like they do with h2b or f2d swaps.

    This won't work, that's what I was originally going to design, but since the drivers side axle won't go in the tranny because of the motor being in the way - see pics above - it's going to need more custom work on the motor and tranny to make this work. Everything mechanical (flywheel, clutch and starter) all seem to line up and work great, just gotta get the other couple things figured out.
  • evol911evol911 familEE
    I've never dealt with b-series before but I was wondering if the motor mounts align fine with the trans mounts. If the motor mount kits for a b into an EF put the motor in a different place than where the d-series trans mounts up you could have a crooked motor in a number of different axis. Maybe something to think about. I could measure how far it is between the firewall and the back of my DOHC ZC head to give you some numbers to compare with but I guess it would be better to go with the centerline of the motor, whatever/wherever that is. I know its not as drastic but I'm thinking of something like the f-series Accord(in the Accord of course) motors being clocked back towards the firewall, so if the B actually leans farther back than the D does. Its probably not that big of a deal, just something I was pondering.
  • stampernstampern Senior Wagonist
    The d and the b series both mount at about the same angle. My goal is to use the rear and the passenger mount from the factory ef, then work on a custom drivers side mount. The good thing about going that way is that the axles will still be centered from using the same mounts they come with from the factory. Once I get the tranny mounted up a little better and get the axle section cut out I'm going to try fitting into my stripped crx which doesn't have anything in it right now so I can see how the mounts line up and stuff. I'm worried I might have to lower the motor a little all the way around, but with the stock d series mounts I can just make some spacers for them, so shouldn't be too difficult.
  • HaydzHaydz Moderator
    stampern wrote:
    My goal is to use the rear and the passenger mount from the factory ef

    You mean EE. Passenger side EF is opposite to passenger side EE.
  • stampernstampern Senior Wagonist
    What do you mean by opposite? I'm going to use the hatch/crx/4dr drivers side mount and rear mount. Since I'm initially going to put this into a crx for basic fitment, I won't be using the wagon mounts yet.
  • HaydzHaydz Moderator
    EF = Right Hand Drive (Predominantly)
    EE = Left Hand Drive (Predominantly)

    Saying 'drivers side mount' or 'passenger side mount' is completely pointless. ;)
  • stampernstampern Senior Wagonist
    Oh, lol - how about american passengers side - he he. So I'm basically going to use all the factory transmissions mounts and then make a custom motor mount for the american drivers side (left side). lol
  • HaydzHaydz Moderator
    Very interesting to see how this pans out. The true test will be testing it when it's running!

    FYI when talking about sides of car just use left and right. It should always be assumed you are standing at the back of the car looking forwards. :)
  • ricefighterricefighter Wagonist
    Hallelujea heavens has sent us an angel. i will pray that this will have a very happy results. i have always been dreaming about this for the longest time. thank you and more power to you Stampern.


    wagon.....................4ever...............................
  • stampernstampern Senior Wagonist
    So, I might have some good news - I was looking at this b series motor and tranny that I pulled out of a teg today, and the axle hole is just as close on the b series motor, and I know why - INTERMEDIATE SHAFT. The b series don't need as much clearance there because the intermediate shaft on that end is about the same diameter as the black seal. This is AWESOME news for us 4wd guys cause we have intermediate shafts (obviously). So now, I might have to pull my intermediate shaft off my 4wd and test fit it to see if it will work. This just means that for the 4wd guys less mods to make it work (woot). I'm still going to work on a full kit either way, but ya, I'm rambling. I'll keep you guys updated.
  • HaydzHaydz Moderator
    Yeah the RT4WD uses int shaft but i'm 99% sure it is different to the b-series one. Might be able to mock something up to work though!
  • stampernstampern Senior Wagonist
    Ya, I'm contemplating about how to mount it up to the back of the b series block (i'm sure the bolt pattern is different). But I've got a few ideas on how to do that already. It's just good news cause we won't have to cut a chunk out of the block to make the standard (non intermediate shaft style) axle fit.
  • HaydzHaydz Moderator
    I think two of the three bolt holes will line up with the 4WD int shaft but it won't plug into the tranny.
  • stampernstampern Senior Wagonist
    Haydz wrote:
    I think two of the three bolt holes will line up with the 4WD int shaft but it won't plug into the tranny.

    It should plug into the tranny - 4wd int shaft and 4wd tranny.
  • HaydzHaydz Moderator
    Doh. Ignore that. Blond moment.
  • JakerJaker familEE
    stampern wrote:
    Haydz wrote:
    I think two of the three bolt holes will line up with the 4WD int shaft but it won't plug into the tranny.

    It should plug into the tranny - 4wd int shaft and 4wd tranny.

    However, the bolt holes for the intermediate shaft in the B series block won't necessarily place the intermediate shaft in the correct location to "slide" into the RT4WD transmission. Here's hoping it does (for you sake).
  • jackmarkgrafjackmarkgraf Band Wagon
    IN!!! I'm anxious to see how this turns out. I've always wanted to do an H2D in my 4wd wagon... $$$ owns me though...
  • stampernstampern Senior Wagonist
    By the way guys, if any of you are looking for sport compact how to videos, well that is one of my other projects. Check out Import Nights TV (INTV) for complete swaps and engine builds and eventually everything in between. We walk you through everything bolt by bolt. None of that cheesy take this off then take this off stuff. You watch us do everything. I'm getting ready to release an OBD0-OBD1 conversion video. Website is http://importnightstv.com. Check it out and let me know what you guys thing.
  • skinnyskinny Senior Wagonist
    its about time someone did a wire by wire write up on a obd0 to obd1 conversion harness. there are write ups but it just words and no pics or vids. Im excited and I cant wait. I need a "special harness" due to the ecu i plan on running (po8) and dont need the extra pig tails and what not. god speed on the write up!
  • stampernstampern Senior Wagonist
    skinny wrote:
    its about time someone did a wire by wire write up on a obd0 to obd1 conversion harness. there are write ups but it just words and no pics or vids. Im excited and I cant wait. I need a "special harness" due to the ecu i plan on running (po8) and dont need the extra pig tails and what not. god speed on the write up!

    The video I am making is exactly the harness you will need. We got sponsored to use Rywires conversion harness. If you have MPFI already then this conversion will be a BREEZE. If you have DPFI you'll need some extra work. I'm hoping to have that video up soon.
  • skinnyskinny Senior Wagonist
    So how is the conversion and conversion harness going?
  • stampernstampern Senior Wagonist
    Conversion is done, just have to finish the video.
  • skinnyskinny Senior Wagonist
    any chance of a pic by pic wire by wire? I kind of want to hardwire them into the car. I dont wanna rip apart my stock ecu. If anyone knows where I could go buy the female plugs that would be awsome.
  • stampernstampern Senior Wagonist
    www.rywire.com - that's what they do - awesome guys.
  • vtecn8ivevtecn8ive Senior Wagonist
    stampern wrote:
    http://www.rywire.com - that's what they do - awesome guys.


    Or you can be a man and doing it yourself like me and this one dude did years back 8)

    http://www.honda-tech.com/showthread.php?t=1319235


    (btw I have heard nothing but good things of rywire)
  • stampernstampern Senior Wagonist
    I called and talked to my buddy today that has a few more metal working tools that I do, gonna take the motor over to his place and work on a basic adaptor plate. I believe that I can make a 1/2" thick plate and still be fine with the tranny input shaft and starter. Worst case scenario I'll have to make a small spacer for the flywheel (no biggie). I haven't tried to test fit a flywheel guard plate yet, but will worry about that later. So far things are going a little smoother than expected. The true test will be to fit a 4wd tranny up to the block and check clearances. I will have to wait until I pick up the 4wd wagon from revtech to test this part. Hope it's soon.
  • teamolsteamols New Wagonist
    nice job you must fee like you are getting closer and closer. thats a cool feeling because you know a big break is coming. thats about the time my mind just latches on to a project and wont let go.did you have any issues with the trans input shaft?or did the d series flywheel stay in the same position?your the man for getting this done it is like a dream come true for me too.suscribed..
  • stampernstampern Senior Wagonist
    Actually, I'm using the b series flywheel and clutch. I'm having to use the d series one. The b series is about 3/4 of an inch bigger around and won't fit inside the d series tranny casing. But the input shaft lined right up as well as one of the bolt holes which is great and gives me a perfect place to start. I'm hopefully going to start on the mdf adaptor plate mock up this week and see how everything fits. I'll definitely be getting pictures as I go. Does anybody here have access to a CNC machine?? I'd love to have this cut out with one once I get the final one made.
Sign In or Register to comment.

© Vanilla Keystone Theme 2025