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F20C Miata engine conversion
12 Attachment(s)
Thought I'd share this with you guys. Customer wanted to swap an f20c in his miata, so I took on the project. Customer dropped off the car Friday, I've spent yesterday and today to get to where I am now, I should have it wrapped up tomorrow, Tuesday at the latest.
follow me on Instagram guys, I post all sorts of cool fab stuff there - zanderguerra Here is the subframe addition, 1.25" square and 1.5" round, all tig welded. https://www.miataturbo.net/attachmen...ine=1382929527 https://www.miataturbo.net/attachmen...ine=1382929527 https://www.miataturbo.net/attachmen...ine=1382929527 I welded it onto the bottom of the subframe https://www.miataturbo.net/attachmen...ine=1382929527 And cut what I didn't want anymore away with a sawsall https://www.miataturbo.net/attachmen...ine=1382929527 I will be boxing In all of the open areas around the stock subframe, and adding a few reinforcements before this is done. https://www.miataturbo.net/attachmen...ine=1382929527 Engine shimmed and tweaked into position. Yes you loose ground clearance with this swap, the engine is too tall for the miata without being positioned farther back. I built it to sit a slight bit lower than the sump, to protect it. https://www.miataturbo.net/attachmen...ine=1382929527 Close up of the subframe side of the mounts https://www.miataturbo.net/attachmen...ine=1382929527 Don't mind the bolts not being in all the way, or there being a piece of stainless stock through the mount hole, it's all just mocked up in these photos. Driver side https://www.miataturbo.net/attachmen...ine=1382929527 Passenger side https://www.miataturbo.net/attachmen...ine=1382929527 I have the steering rack mounts made and sitting in this picture, but it's not aligned or welded yet, I was tired and didn't feel like working anymore https://www.miataturbo.net/attachmen...ine=1382929527 so here's where I sit at the end of day two https://www.miataturbo.net/attachmen...ine=1382929527 All I have left is the ppf adapter, a few hours of fab and welding to finish up the subframe, weld the mounts for rack, and lengthen the steering shaft. I'll post more tomorrow. |
Awesome!!!!
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Well shit. That escalated quickly.
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loving this already!
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hell yeah, nice job. Damn you're quick.
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If the exhaust and intake weren't opposite of what a BP Miata engine are, my car would have a k20/k24 in it.
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Originally Posted by thirdgen
(Post 1067326)
If the exhaust and intake weren't opposite of what a BP Miata engine are, my car would have a k20/k24 in it.
Why is that stopping you? |
I should add the fact that all the factory NB gauges need to also work perfectly...that's another thing stopping me.
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6 Attachment(s)
Here's a little update, better pics of the mounts, and the steering rack is mounted
https://www.miataturbo.net/attachmen...ine=1382984502 https://www.miataturbo.net/attachmen...ine=1382984502 https://www.miataturbo.net/attachmen...ine=1382984502 https://www.miataturbo.net/attachmen...ine=1382984502 https://www.miataturbo.net/attachmen...ine=1382984502 https://www.miataturbo.net/attachmen...ine=1382984502 Next is the ppf adapter! |
Originally Posted by thirdgen
(Post 1067356)
I should add the fact that all the factory NB gauges need to also work perfectly...that's another thing stopping me.
Curious how far from stock location the steering rack is? |
Originally Posted by TorqueZombie
(Post 1067491)
Curious how far from stock location the steering rack is?
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Get some videos of it when completed! I'd like to see what you think of the steering with the altered rack. Track or street car?
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Originally Posted by Boost_addict
(Post 1067531)
About 4 inches, the ball joints are still the same distance away, just behind instead of in front of.
It's not only the distance, it's also that the rack is on the other side (rack in front of the knuckle) that make a change in behaviour. |
2 Attachment(s)
Originally Posted by NiklasFalk
(Post 1067555)
Copy in any discussion in the K24 thread.
It's not only the distance, it's also that the rack is on the other side (rack in front of the knuckle) that make a change in behaviour. Anyways, here's the ppf adapter, probably overbuilt, but I like strength. https://www.miataturbo.net/attachmen...ine=1382999814 https://www.miataturbo.net/attachmen...ine=1382999814 Almost done! Just superficial stuff now; boxing in the subframe and reinforcing it, and the steering shaft. |
That adapter is pretty nice work, I always feel that I am not good at big parts like that.
Dann |
5 Attachment(s)
And that's it, everything fits and mounts well, so I pulled the engine back out for the final time, so I could box in the subframe.
https://www.miataturbo.net/attachmen...ine=1383074278 https://www.miataturbo.net/attachmen...ine=1383074278 https://www.miataturbo.net/attachmen...ine=1383074278 Here's the ppf adapter on the trans https://www.miataturbo.net/attachmen...ine=1383074278 https://www.miataturbo.net/attachmen...ine=1383074278 That's it guys! Now I'm making fixtures of the mounts, and a fixture of the whole subframe with new steering rack mounts. That way I can make tubular subframes in the future. |
Thread win.
You make this look soo easy hahahah Props |
What do you do about:
1. Lengthening the steering shaft? 2. Driveshaft pinon angle adjustment? |
driveshaft angle would be the same way you do it on a stock miata. the ppf bolts are oblong to adjust it after you get the bolts in and loose.
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Originally Posted by 18psi
(Post 1067973)
Thread win.
You make this look soo easy hahahah Props |
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