Honda B-Series Adapter Plate for Electric Motor
Description
This would allow you to install an electric motor in a Acura Integra or a older Honda Civic SI and certain Civic Del Sols.
I'm installing it in a Honda CRX using some motor mount adapters and custom axles.
I have not yet bolted the whole thing together. I bolted the plate on the motor the other day and found that the spacer (that goes between the motor and the adapter plate) was a couple of mm to short, causing the ring gear on the flywheel to interfere with the bell housing. Hopefully, next week I'll be able to machine a new spacer and bolt the whole thing together with the clutch installed.
The bolt pattern appears to be spot-on though I may have to ream the clearance holes out a bit as the Honda bolts seem to have a larger shoulder than normal. One of the threaded holes is the wrong size which I will fix when I get a chance. It didn't end up mattering since the hole was oversize but the same pitch and I can just heli-coil it down to the right size.
So far, the centering of the input shaft on the motor shaft seems to be good.
Instructions
The final thickness of the plate is about 1.25". This is a bit of overkill but my application is somewhat high powered. You could probably easily get away with a thinner plate and a thicker spacer if you wanted to save on weight and aluminum.
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Very nice! And as Solarbotics said, well timed. I had my first street test with my electrified VW Van yesterday:
http://www.youtube.com/watch?v...
My adapter plate is currently made from six layers of 9mm plywood. That's great for home fabrication and works for a while until I know that my measurements were perfect and I can contract the final adapter from aluminium... .
Congratulations. I'm a ways off from a road test (though the car was under electric power before, I'm just redoing everything). I just bolted the motor, flywheel and transmission together yesterday to make sure everything fits. Now I have to figure out the motor mount and a mount for the intermediate shaft (some Hondas have a short little shaft between the transmission and the halfshaft on one side so that the two halfshafts can be the same length).
A well-timed contribution. I've got an '88 CRX SI where I've been trying to figure out how to design my adapter!
Thanks muchly!
Cool! I have an adapter plate laying around for an '87 CRX. I assume the bell housing changed for the second gen though. I switched to a B-Series transmission to get access to better multi-plate clutches and LSD diffs. I ended up taking the transmission apart so that I could put the bell housing half on the table of the CNC machine and use a touch probe to locate the holes and the input shaft. I tried other things like scanning the transmission and locating the holes from that but I wasn't getting it accurate enough for my liking. Good luck and let me know if I can be of any assistance!
Nice!
Home CNC, or done at work?
A little of both. My brother is a metal sculptor and has a large shop. A while ago we purchased a machine for $500. The table is 20x40. We then spent a ton of money retrofitting a windows based controller to it. In the last year or so I took that system off and replaced it with EMC on linux. It's a million times better than the multi-thousand dollar windows package and I don't have to deal with Windows!
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More from jag
in a crx you do not need custom axles, you can take the whole hub/spindle assembly from a 90-91 acura integra, and they will bolt right into the 88-91 honda civic and civic crx. now you just need the integra axles, and half shaft (intermediate shaft).
Search for B18 swap EF civic, you will find all the information. you can also mix match any kind of honda/acura engine mounts to make most of the engines and transmission combos fit in anything honda.
also you get the added benefit of the larger integra brakes going into the crx, which is way more braking power than you will ever need. you can also swap out the integra master break cylinder for a more factory brake pedal feel. theres also adapters to do cable to hydro clutch conversion, since the older cable clutch transmissions are getting harder to find.
Except my CRX is an '87.
I used a factory intermediate shaft and then some hasport halfshafts.
I already had integra gs-r calipers on the front and integra discs on the rear.
I have removed the vacuum booster since I don't have a free source of vacuum and I was tired of listening to the vacuum pump.
I just took the car for a drive last week (the first time in 8 years). Everything fit fine. I've since taken it apart to finish up welding a few parts and to make sure all the bolts are tightened.