Honda K24 swap a Datsun 510

[Trophy24]

Getting closer 

 

[Trophy24]

While the adapter is in progress, there are many other things to solve. What about the flywheel? The engine came out of an automatic transmission car. We found one on Amazon for $80. No prime shipping though. What do you do when you want it NOW? Facebook was checked and bingo! Local Honda guy upgraded his ride and was selling his old parts

 

[Stoffregen Motorsports]

Will it require a spacer? Or is the input shaft long enough?

[Trophy24]

Turns out the input shaft is not long enough. We are working on a solution for that. The easy expensive way is to buy the custom flywheel that spaces the clutch surface out to make up for the adapter. Nice and neat, but again expensive. 

 

Any ideas on a spacer?

[Stoffregen Motorsports]

To install a manual behind an LS motor, you need a special pilot bushing adapter, which basically spaces the pilot bushing out about 3/8 of an inch.

 

Obviously, you could machine a spacer for the flywheel that also held the pilot bushing. How much too short? If you're talking an inch or more, maybe a spacer isn't such a great idea. You have to account for a starter too and a spacer that thick would require massive relocation of the starter.

[Stoffregen Motorsports]

Ok, here's a thought - instead of using only a machined bellhousing ring, why not machine some material off the 71 series trans and welding the adapter to the bellhousing at the proper depth?

Edited November 14, 2021 by Stoffregen Motorsports

[Trophy24]

We thought about that but have to consider attaching to the engine block too. Our brainstorming led to the differences in the clutch discs. The Honda clutch in the foreground has splines for the input shaft that are much closer to the engine. Compare to the SR20 set up in the background. This reminded me of clutches I have replaced in the past where the splines stuck out really far

[Trophy24]

Here is one Jeff found on rock auto. Note how far out the splines sit. Too bad FWD Nissans aren’t the same splines 

[Trophy24]

While the transmission problem is being sorted out I put the oil pan in the parts washer at work. Strange how the Honda-bond sealer became really brittle in the inside of the oil pan. Came off by hand in chunks. The outside remained flexible. The Toyota product I use at work does not do this. 
 

all cleaned up and ready to be cut up for mock assembly 

[Stoffregen Motorsports]

On 11/15/2021 at 10:10 PM, Trophy24 said:

We thought about that but have to consider attaching to the engine block too. Our brainstorming led to the differences in the clutch discs. The Honda clutch in the foreground has splines for the input shaft that are much closer to the engine. Compare to the SR20 set up in the background. This reminded me of clutches I have replaced in the past where the splines stuck out really far

 

Use a Nissan disc to help take up some of the distance. I'm sure you can find one with a similar diameter to work with the Honda flywheel.

[Stoffregen Motorsports]

On 11/15/2021 at 10:29 PM, Trophy24 said:

While the transmission problem is being sorted out I put the oil pan in the parts washer at work. Strange how the Honda-bond sealer became really brittle in the inside of the oil pan. Came off by hand in chunks. The outside remained flexible. The Toyota product I use at work does not do this. 
 

all cleaned up and ready to be cut up for mock assembly 

 

If I recall correctly, the Toyota sealant is a semi hardening Three-bond product (1215?). I thought the Honda sealer was similar, but I guess not.

[Trophy24]

The Toyota sealer is FIPG (fix in place gasket). It is what I’m used to and works very well. This was my first Honda bond experience so I was paying close attention to it out of interest. I have heard good things about it from others. Not sure if it is any better or worse. 
 

Our measurements for transmission interfacing were verified before proceeding to the next steps. We were a little tired the first time. Math late at night can be risky business lol. 
 

the adapter plate is rumored to be on the 3D printer soon so we can mock things up in real life. 
 

A custom clutch disk is also in the works. In theory it will help solve the input shaft depth problem at a reasonable cost!  Nissan splines offset towards the transmission. Honda diameter disc and pressure plate. I am looking forward to sharing success on this one 👍

 

here are some examples of what we are trying to solve. Thanks Carter!

stock 

 

[Trophy24]

Stock with adapter 

 

 

[Trophy24]

Custom clutch 

 

 

[Trophy24]

This would keep the starter ring gear right where it needs to be by using the Honda flywheel. Off the shelf parts are a win if we can pull this off

[]2eDeYe]

Custom disc is an interesting solution, looking forward to seeing the results. 

[Stoffregen Motorsports]

It has been a long time, but yes, custom clutch discs are not hard to source. There was a shop we used for all our custom clutch discs, the name of which slips my mind.

[thisismatt]

10 minutes ago, Stoffregen Motorsports said:

It has been a long time, but yes, custom clutch discs are not hard to source. There was a shop we used for all our custom clutch discs, the name of which slips my mind.

 

Hopefully not indicative of the clutch quality 😛

[Stoffregen Motorsports]

Come on guys. Where are the updates?

[Icehouse]

Clutch is still being made, it won't be sprung which sucks if you want to use if for more of a street car.  We are also re scanning the block tonight, need motor mount hold patterns.  

[Trophy24]

So where were we…

3D printed parts are for verification. Good thing as we needed to make some adjustments 

 

[Trophy24]

As it turns out scanning a threaded hole is not the best approach. Scan 2.0 was more deliberate. Inserted dowels into the holes and painted them with “scanning spray”. It appears flat white when dry

 

[Trophy24]

And 2.0 on the transmission case too. Should have cleaned it first lol

 

[Trophy24]

So of course I cleaned it after. Looking much better. S13 on the left, S14 on the right. 
 

the clutch is rumored to have been shipped so some excitement on our end
 

[]2eDeYe]

Fancy hi-tech stuff in here B)