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Official vintage Honda S-car engine swap discussion thread.

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Old 09-26-2007, 11:51 AM
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Default Official vintage Honda S-car engine swap discussion thread.

It seems that every time I, or someone else makes a thread about an S600/S800, within the first few posts someone mentions "S2000 swap", or some other engine swap.

So let's make this thread the official thread to discuss what swaps have been done, theory behind potential swaps, why or why not to swap, etc...

I'm sure a few people will disagree with me on this, and that's OK, but I think that idealy the only engine one should swap into their vintage S-car is another vintage S-car engine. And this should only be done if your original engine is missing or beyond repair, or if the car you're considering this swap is in bad shape.

So why should one NOT want to swap the engine's in these cars? Simple answer, because they're so rare. During the "S-cars'" 7 year run, Honda only made about 26,000 of them (I'm willing to bet they made more EF/EG/EK Civic's than that in a single month). Not to mention, there's probably less than half still around worldwide, and only several hundred in the USA.

Also, let's consider what makes these cars so special. The engines. The engine specs were similar to that of a Formula 1 race car from the time; double overhead camshafts, four carburetors, a needle roller bearing crankshaft, and a 9,500 rpm redline, all from a sub-1 litre engine. What other car can you even begin to compare this to from that time-period? The engines in these cars are really the jewels that make them what they are. They are a testiment to Honda's injenuity, and technological creativity.

But if you don't care about all that, and want a go-fast car, let's consider what you'll encounter when trying to do this (this whole post is written for the S2000 swap point of view):

First, you must understand how small these cars are, they can "literally" fit into the back of a full size chevy truck. Until you've actually seen one of these cars in person, you probably can't visualize just how small they are.

But you don't care how small it is, you've got an S-car, an F20C, and a never ending bank account, so let's think about what it would take.

If you don't mind a hideous "valve cover scoop" in the hood, to hide the valve cover that won't fit under the stock hood, and after you notch the firewall to accept the back of the engine, then after you raise and widen the tranny tunnel, then have some custom shift linkage made to move the shifter from the trunk area to somewhere near the stock shift point, then find someone to narrow an S2K rearend (or use something else maybe), who knows, you might not even need a driveshaft, tranny may bolt right up to the rearend.

But since the engine fully occupies every square inch of the engine bay, you'd have to mount the radiator somewhere else, maybe the trunk perhaps, and run some long collant lines/hoses along the frame perhaps.

So now that the engine is in the car, then you'd have the problem of steering, since the S-cars have a steering rod that goes right through the engine bay, and since this space would now be occupied by this extra large engine, now you'd have to custom fab up some steering system. With all the added weight, surely the front torsion bar suspension wouldn't be enough, so the entire front suspenion geometry would have to be redisgned and custom made. Most cars have drum brakes, or some very small disc brakes, surely that's not enough stopping power. So of course the entire brake system would have to custom fitted, brake booster master cylinder etc...., but again, since the engine alone is occuping all of the engine bay, where could all that be housed, there's still some room left in the trunk, so maybe in there.

Now all that said, I will admit that I have considered the purchase of an S600 for a custom "hot-rod" type project (not with an F20C though, maybe CBR600RR engine, Honda F12X turbo watercraft engine, or something like that). It was a very rusty car, that was missing it's drivetrain, among many other parts, more or less a parts car with no hope.

I guess that's all I have to say about that, lol.

If anyone wants to add to, expand upon, contradict, debate, or otherwise discuss anything relating to classic S-car engine swaps, please feel free to do so.

Old 09-26-2007, 06:16 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (smithenhiven)

This is going to be a really interesting thread. What are your thoughts on racing S-cars? (Modifing the original engine, roll cages etc) or supercharging the original motor?

I have seen these engine swaps so far 124 Fiat 1600 motor turboed with NOS in S600 Coupe. It has to be my favourite modified coupe. Toyota Corolla 1.3L in convertible, (Smithenhiven, you might have bought parts from him off ebay (Richard from Brisbane)). He sold all his original cars and kept modified one. Im still waiting on those pictures for the superchanged 600cc S600.

What has interested me lately has been motorcycle engines, Yamaha R1, Hayabusa and CBR600RR. There is not much information about swapping them into cars. I have been to Z-cars and mini forums but they only seem to mount the motor in the rear. I guess my question is, how would you go about putting the motor in the front with power at the rear wheels in the honda s600? prop shaft, long chain?

Edit: I also read a post by MedicalStudent that stronger chains are needed. What about the weight of the car? More stress on the motorbike engine?


Modified by Ztlohmak at 7:32 PM 9/26/2007
Old 09-27-2007, 03:32 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (Ztlohmak)

so this is your build thread of how to put an S2000 motor in your car? awesome!!!


i've stopped paying attention to people who think it can be done. they also think putting a b series in an 84-87 civic is a travesty, but cramming an S2000 motor into an early S car isn't? sometimes, i don't even know why we have this forum! the only good posts are made by the people who actually OWN a vintage honda! sometimes i feel like this forum needs to be locked to others so we don't keep getting these stupid questions..

anyways, how about a k20? that should bolt right in, right?

but honestly, a cool little swap would be a Turbo City 1200, but there'd be so much fabrication just with the turbo system ALONE it wouldn't be worth it.

but i agree with you. the engine is most certainly one of the major parts of the S cars. keep it in. unless you can do a good enough job fabricating something else in there, which is highly unlikely. 'busa motor?
Old 09-27-2007, 04:51 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (E-AT_me)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by E-AT_me &raquo;</TD></TR><TR><TD CLASS="quote">so this is your build thread of how to put an S2000 motor in your car? awesome!!!
</TD></TR></TABLE>

I'm clearly against putting an S2000 motor in an S-car. I wrote what I did, from the perspective of putting an S2000 motor in an S-car, hopefully so that people would realize how much of a waste of time it would be.
Old 09-27-2007, 09:26 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (smithenhiven)

I like original cars too, but there are circumstances in which the value after restoration doesn't come close to justifying the cost of bringing a car back to original. These days, I suspect that applies to almost any S-car rescued without its drive train. I've been scanning the US e-bay site for S600 parts regularly for the better part of a decade. Waiting for an engine to come up for sale there isn't an option, though the Japanese site might be for those willing to go that route. S-car parts in Japan are more available but Expensive.

I agree that the engine is what make the S-cars so special. The conventional choice for a car without an engine would be to buy another parts car and use it to make one car from two. Leftover parts could be cleaned up and sold on e-bay, probably recovering the entire cost of the parts car and the cleanup. You can preview this yourself, folks. Get onto e-bay motors, search 'Honda S600' and see what you find. There's just one item today, the usual situation.

However, I also think that the S-car platform is a good candidate for a custom car. I've never owned a custom car myself but I admire them on the street or in a show. The craftsmanship and imagination required to build a good one are both well beyond what's needed for a normal restoration.

Using a bike engine seems more sensible than trying to shoehorn in the engine from a much larger car. There's a small company up the road from me that makes its living putting Hyabusa engines into the Caterham 7. These cars are really quick (0-60 in under 4 seconds). The S600 in stock trim weighs about 25% more but I imagine a Hyabusa-engined S-car could still leave most things in the dust.

Staying within the Honda family, would another option be the engine from a Honda Beat? I don't know much about these cars but they're small enough and cheap enough now to be a good candidate, if you can find one.

Old 09-27-2007, 04:35 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (Bobs600)

i know you weren't. i was joking...

anyways, the beat is a 3 cylinder with like 70hp. not too much of an improvement!
Old 09-28-2007, 07:59 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (E-AT_me)

Any swap would be tragic. These cars are just too rare for stuff like that. Get a Miata if you want to do that kind of crap with a roadster.

I still wish Honda would have made this... An S600... wouls have been a true sucessor to the beloved s600/800...

Old 09-28-2007, 08:31 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (redlynr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redlynr &raquo;</TD></TR><TR><TD CLASS="quote">Any swap would be tragic. These cars are just too rare for stuff like that. Get a Miata if you want to do that kind of crap with a roadster.
</TD></TR></TABLE>

that's why i've got a miater!

sick little honda concept, man!
Old 09-28-2007, 12:20 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (E-AT_me)

For me, put another engine into a S-car is not good, because, as you have said, the engine make a lot for the "personality" of this car. Maximum, just modify the original engine with better carbs or others parts is really cool. If I must to a swap on a S (I want to said, with a gun behind my head ), I think I will looking for a motorbike engine.

I also think the Beat is a descendant of the S-cars, but is unpowered. I think it's cooliest to swap a Beat, with is rear engine it's maybe be easiest.
Old 09-28-2007, 01:19 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (redlynr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redlynr &raquo;</TD></TR><TR><TD CLASS="quote">Any swap would be tragic. These cars are just too rare for stuff like that. Get a Miata if you want to do that kind of crap with a roadster.

I still wish Honda would have made this... An S600... wouls have been a true sucessor to the beloved s600/800...

</TD></TR></TABLE>

Actually, Honda is discontinuing the S2k within the next few years or so, Reportedly to be replaced with a lightwieght K20 powered Miata killer, Hopefully it stays similar to that concept!
Old 09-30-2007, 08:01 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (Infinityzer050)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Infinityzer050 &raquo;</TD></TR><TR><TD CLASS="quote">

Actually, Honda is discontinuing the S2k within the next few years or so, Reportedly to be replaced with a lightwieght K20 powered Miata killer, Hopefully it stays similar to that concept!</TD></TR></TABLE>

i would buy one of those if they kept it light, around 2500-2600 lbs.

god that would rule.
Old 10-21-2007, 03:32 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (doublethink)

A K20 powered rwd miata killer would be a badass car.
Old 10-21-2007, 02:28 PM
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I believe an F20C has been swapped before (those Australians will swap anything). But I don't think it worked out too well (hence not much said about it - just like when my friend swapped a Chevy V8 into the S2000, he's scared of it).

I've also seen (also from down under) a shoehorned RB26DETT from the Nissan Skyline (Inline-6 motor). Hood was removed and the front was chopped to pieces. I think it was made more as a joke. Too bad I don't have pics.

I believe the CBR600 swap would be an ideal candidate. But everything downstream from the motor (which is pretty much everything) would need to be replaced extensively. I sincerely doubt you could utilize a chain-driven chassis and would need to swap out the rear end altogether. A junked S800 would be a better candidate for a CBR600 or CBR1000 swap than the S600. My friend suggested custom chains, but I'm still skeptical.

Whenever I get my second S600, I might give it a try if the car's a basketcase. The seller seems to think so, but it still sounds like it can be resurrected since it has everything but the interior and it's just in separate pieces.
Old 10-21-2007, 02:59 PM
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Default Re: (medstudent)

i have a mag that has a b18c in the back of a beat. i think buddy club did it. i'll have to dig up some pics for you guys. it's awesome lookin.
Old 10-22-2007, 09:38 AM
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Default Re: (E-AT_me)

I tend to agree that good stock ones should be left alone or restored but if it's a basket case that's missing most of it's original parts I see nothing wrong with going crazy on it. However, I think the only acceptable engine swap would be a modern Honda motorcycle engine.
Old 10-23-2007, 01:56 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (smithenhiven)

While I find sarcam and cynicism as enjoyable as the next person, I think a true "offical blah blah swap thread" should actually list some legitimate information such as engine bay diameters, links to known swaps, etc.

Else we should just change the title to "My opinion about S-car engine swaps"
Old 10-28-2007, 07:36 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (cafcwest)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cafcwest &raquo;</TD></TR><TR><TD CLASS="quote">While I find sarcam and cynicism as enjoyable as the next person, I think a true "offical blah blah swap thread" should actually list some legitimate information such as engine bay diameters, links to known swaps, etc.

Else we should just change the title to "My opinion about S-car engine swaps"</TD></TR></TABLE>

Old 10-29-2007, 06:33 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (Ztlohmak)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ztlohmak &raquo;</TD></TR><TR><TD CLASS="quote">you might have bought parts from him off ebay (Richard from Brisbane)).</TD></TR></TABLE>

This guy always floods aussie ebay with some great S parts.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by E-AT_me &raquo;</TD></TR><TR><TD CLASS="quote">i have a mag that has a b18c in the back of a beat. i think buddy club did it. i'll have to dig up some pics for you guys. it's awesome lookin.</TD></TR></TABLE>

I remember this thing, it was purple with tyres wider then rosie o donalds thighs.
Old 10-29-2007, 06:46 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (~sp33~)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ~sp33~ &raquo;</TD></TR><TR><TD CLASS="quote">
I remember this thing, it was purple with tyres wider then rosie o donalds thighs.</TD></TR></TABLE>

YOU GOT THAT RIGHT BABY!!! hahahaaa.

why do we need "measurements and links to known swaps?" this is just a discussion thread.

and i don't think there are any "known" swaps.. that comes to mind, atleast. carry on! still need pics of the beat..

edit: to make my post more "tech" related, a "swapped" S600 coupe in aussi!:
http://www.autospeed.com/cms/A_108681/article.html
Old 11-01-2007, 08:09 PM
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The car in that autospeed link is a beauty. I hope to have a project one-day as worthy!!
Old 11-01-2007, 11:48 PM
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Default Re: (Jonathan_ED3)

This swap may seem a little out there, but what about a Triumph GT6 engine? It doesn't look much bigger than the stock motor.

http://cgi.ebay.com/ebaymotors...wItem
Old 09-28-2014, 10:51 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread.

im looking ither for an engine for an s600 or and easy swap like and old motor cycle motor any sugestions
Old 09-28-2014, 11:20 AM
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Default Re: (E-AT_me)

Originally Posted by Type_RS_59
I tend to agree that good stock ones should be left alone or restored but if it's a basket case that's missing most of it's original parts I see nothing wrong with going crazy on it. However, I think the only acceptable engine swap would be a modern Honda motorcycle engine.
what about an early gold wing engine on carbs? I think they should be original too, but that would be quite an improvement, and could be made to look really nice, plus it's all Honda. A lot of the original technology in these cars came from the bikes, so you really need to at least stay with the bike engine
Old 10-01-2014, 08:15 PM
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Default Re: Official vintage Honda S-car engine swap discussion thread.

As a purist, I can see little to no justification for installing drive train which is not original. The cars are rare enough as it is.
For road / registered use, the money spent on re-engineering an S to non original drive train can be more than doing a good job with original parts. And here in Australia, non original cars have little to no final value, whilst the value of original fitted cars is finally increasing.
I guess the biggest issue most restorers face is buying the first car that comes along, which is usually a gutted, rusted piece of junk. Then yes, finding original drive train is difficult. Waiting for a more complete car may take time but will not usually cost much more.
The gutted, rusted pieces of junk need to be viewed as parts donors, ie panels, chrome, suspension etc. One car like this can easily help several better cars find their way back onto the road.
Old 10-02-2014, 12:04 AM
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Default Re: Official vintage Honda S-car engine swap discussion thread. (smithenhiven)

Originally Posted by Ztlohmak
This is going to be a really interesting thread. What are your thoughts on racing S-cars? (Modifing the original engine, roll cages etc) or supercharging the original motor?

I have seen these engine swaps so far 124 Fiat 1600 motor turboed with NOS in S600 Coupe. It has to be my favourite modified coupe. Toyota Corolla 1.3L in convertible, (Smithenhiven, you might have bought parts from him off ebay (Richard from Brisbane)). He sold all his original cars and kept modified one. Im still waiting on those pictures for the superchanged 600cc S600.

What has interested me lately has been motorcycle engines, Yamaha R1, Hayabusa and CBR600RR. There is not much information about swapping them into cars. I have been to Z-cars and mini forums but they only seem to mount the motor in the rear. I guess my question is, how would you go about putting the motor in the front with power at the rear wheels in the honda s600? prop shaft, long chain?

Edit: I also read a post by MedicalStudent that stronger chains are needed. What about the weight of the car? More stress on the motorbike engine?


Modified by Ztlohmak at 7:32 PM 9/26/2007

I personally know Richard & his Corolla engined car. He purchased it in that form. BUT the changes were made such that it could easily be converted back to original drive train. If it was ever converted back to original, not many would know the very slight modifications done to accept the Toyota drive train. Also, the reason he quit out of S has nothing to do with the premise / subject matter of this post.


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