Sohc swap please help!
 

Hi im derek im new here but ive been doing miata stuff for a while now. My question is i want to know if i can put a SOHC 8v head from a 323 on on my 1.6 miata block? The real problem is will a CAS fit in place of the 323's distributor position? I no im gonna catch crap for this but trust me this is gonna end up rad. In put greatly appreciated.

Turbo , sohc , turbo , first one.

I'm thinking a 1.6 is a 1.6...should bolt right up.

all 1.6's are the same. better yet just install a honda 1.6 head

https://www.miataturbo.net/attachmen...ine=1390026217

Looks pretty similar.
Quick look at pictures of the head gaskets for a 1990 323 vs a 1990 miata show they are pretty close too.

The cas should bolt right up and fit the head. I can't say ifbit will clear the firewall.

Thank you guys for your input. Ill keep you posted :)

Guy on the festiva forum tried a dohc head on a sohc block didn't work valves hit the pistons. The valve reliefs on the pistons are in the wrong places.

Did they make a 16v sohc 1.6 head like they did for the 1.8?

Yup in mx-3. Iirc also in bg 323.

Ok heres my thoughts. I understand how a dohc head in a sohc block may not work. Even though these are non interference motors... BUT a sohc 8v head should be fine on a 16v dohc block. It sounds like the safest thing to do would be turn it over by hand a few times an see if it binds.

Could you please explain to us how this mod will be so "rad"?

damn... that ^^^ was my next question too... haha

Ive never seen anyone do anything like it. I was very impressed with what can be done to the sohc motors in hondas. So opposed to building another turbo dohc motor i wanna frankenstein some stuff to be the first. Everyones seen the v8 miatas an everyone knows a boosted dohc is fast but i doubt if anyones seen a boosted sohc mazda motor. Just the noise that little sohc will make is gonna be rad.

most of the Frankenstein honda motors go from sohc to dohc or non-vtec to vtec, possibly lower or increase compression ratio without machining.. This just gets you less flow..So any other reasons?

Ah, yes. The classic "because nobody else has done it" line of reasoning. :party:

If the valves hit with a dohc head on sohc block Im pretty sure it wont work other way around. Have fun being different with your head that has no aftermarket support and flows even worse than a b6 dohc. :facepalm:

Wanna be different and actually make power? Find a jdm zl-ve head and swap that on.

I have this weed eater that has a 4 cycle motor on it. When I start it up, I marvel at how it has a low throaty rumble when I start it. The thing has surprisingly good throttle response when you pull the trigger too.

But you know what? It is still a fucking weed eater.

Hahaha this is why i joined this site. Thank you guys.

Have you considered swapping the head from the weed eater onto your Miata?

In for...whatever.

Weed eater swap it. Nobody's done it before, fuck it.

Nope, you're right. I've never seen a boosted SOHC Mazda motor.


Also: penis.

https://www.miataturbo.net/attachmen...ine=1390522276

I can only think of one Honda setup where you put a DOHC head on a SOHC block and that is when you put an H22 head on an F22/F23 block. This gives you more power stock for stock, but in overall potential the F22 head is far superior because it has a better combustion chamber and more meat in the head for larger valves and ports.
People frequently confuse aggressive cam profiles with a head being good. VTEC is just a cam profile. A non-VTEC head can do the same thing, it will just get bad gas mileage and not idle very smoothly.

There is not much inherently wrong with SOHC other than a lack of ajustability in the cam profiles and the fact that the spark-plugs cannot be perfectly centered and vertical.

2 valves per cylinder is what makes this a lame head.

I would personally love to experiment with the 16v sohc head in a Miata.

Too late, someone has already done a 3 cylinder SOHC. He is more different and rad than you. Now you either need a 2 cyl SOHC, 2 stroke, or maybe you could put a a V4? All super rad and different.

https://www.miataturbo.net/attachmen...ine=1390534575

How about a big 2-cycle boat engine? Shit would scream, yo.

Sometimes there's a very very good reason why no one has never done something before.....

Where is that dude that put the 2 stroke snowmobile engine in his Lemons Miata? I believe it had a pull start sticking out from the "hood" :rofl:

Edit: I assume it was 2 stroke based on the smoke plume and exhaust note.

Someones got to make a giant 1 or 2 cylinder engine, no? That will be very rad.

A square looking motor would be sick under the miata hood.

http://www.caranddriver.com/photos-1...e-photo-502495


/thread

You can still be different

But fitting the exhaust would be ehm... challenging.

Nothing wrong with frankenengines, but make sure it's fun for you own sake and not for others.

i honestly have no idea why some one would swap the SOHC cyl on...
I'm trying to do the opposite with my protege

This thread is the direct result of Honda retardedness.


https://www.miataturbo.net/attachmen...1&d=1390953811

I wish that was higher resolution... and I don't wish that was in higher resolution :barf:

https://www.miataturbo.net/attachmen...ine=1390968964

I like it.

For the love of god, y u do dis?

I kinda like the tow hook though :giggle:

Did someone blow chunks in the turn signal hole?

In lemons racing, the rules are pretty subjective. The judges frown on teams showing up with miatas. They're just way too good at turning fast laps.

So, you do what Evil Genius or Eyesore racing did. Something a bit 'out of the box'....

It pull-starts by the way.. and is hard on belts apparently..

Is that......a Rotax?!?!?



AWESOME.

Polaris 700 triple, I believe.

Out the snowmobile, yo.

Ok yeah, found the build thread. Polaris 600. 800lbs lighter than a normal Miata. o_O

I can only hope that's what I'm seeing.

Connecting rod tow hook, too!

Dude. I just saw what you were talking about. It's either vomit or croutons, or vomited croutons.

I love delicious garlic croutons, and I don't like to associate them with vomit.

I wonder how a roots scavenged 2 stroke would be for racing. The exhaust plumbing would be much simpler, and there would be no need for oil in the fuel.

why are there springs on the exhaust?

IF, some one is legitimately wanting a sohc head for their 1.8 that would bolt on, I am going to have a know running condition head in a month or so. I'm pulling my sohc 16v 1.8 out of my protege. Can be yours for the price of shipping and a 6 pack of cheap (really cheap) beer.

with a chaser of "because honda".

:fael: