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March 30, 2010 8:41 p.m. stroker Reader

oldeskewltoy wrote:

No reason to use a bike trans......

The H2 BUSA is a 4 cylinder engine that captures the performance of the Hayabusa engine and packages it for 4 wheel applications.

For you cut away fans....

and for the spec hungry SPECIFICATIONS H1V8:

75° odd fire V8 2.8 LITER, 170 cu. in. displacement (3.0 liter optional)

84mm Bore X 63mm Stroke (67 stroke optional)

4 cams, 32 valves via internal silent chain

530mm wide x 485mm long x 530mm high

400HP @ 10,000 rpm with stock street cams (higher spec. is available)

245 ft-lbs torque @ 7500 rpm

200 lbs engine weight

Billet nitrided steel 180° crank

4340 H-beam con-rods with ARP bolts

Billet 6061-T6 aluminum crankcase

Dry sump 0il system with 4 stage pump

7.25" or 5.5" Twin disc clutch

DTA S80 full sequential ECU

Unique cylinder offset and cam drive arrangement yields a compact design- Patent No. 7,168,405

poor man's F1 engine...
March 30, 2010 8:44 p.m. vazbmw Reader

They have a great solution
March 30, 2010 10:26 p.m. tuna55 HalfDork

Agreed, they came up with a neat idea there. It oughta rock. Their dyno comparo vs the Miata is the perfect idea - better at each and every RPM.
March 31, 2010 1:45 a.m. CLNSC3 Reader

Being the previous owner of an 01 busa and planning on buying another one really soon I would LOVE to have a busa powered miata! If their swap kit is reasonably affordable this is something I would SERIOUSLY consider building! I could only imagine the awesome sound and performance that a turbo busa powered miata would offer....
March 31, 2010 6:34 a.m. 4cylndrfury SuperDork

Best
Birthday
EVAR!
March 31, 2010 7:15 a.m. RossD Dork

I think I'm the only one not floored by this. I love engine swaps but in a car the size of a miata I'd rather see a 2.3 duratech/mzr with a bunch of Cosworth parts and/or a turbo thrown at it. The Busa V8 is a different beast though, but its an engine that none of us will likely see because of its high price. Will the weight savings amount to more of an advantage in using the Busa 4cylinder than the dyno's slight increase suggests?
March 31, 2010 7:56 a.m. tuna55 HalfDork

RossD wrote:

I think I'm the only one not floored by this. I love engine swaps but in a car the size of a miata I'd rather see a 2.3 duratech/mzr with a bunch of Cosworth parts and/or a turbo thrown at it. The Busa V8 is a different beast though, but its an engine that none of us will likely see because of its high price. Will the weight savings amount to more of an advantage in using the Busa 4cylinder than the dyno's slight increase suggests?

I guess 30-40% more power doesn't count as "slight" to me. Especially when the engine bay will be less crowded, not more, as with a V type swap. I don't know how much lighter it is, but I would guess it's 100 lbs or so. Some racers would kill their mother for that kind of weight savings.
March 31, 2010 8:09 a.m. skruffy Dork

Does a miata have more than 100ft-lbs of twist stock? Aside from moving the powerband up several thousand RPM I'd say the busa motor probably beats the stock miata mill in torque any day.
March 31, 2010 8:11 a.m. kreb Dork

In reply to tuna55: The website cites a 200 lb. weight reduction with a resulting rearward bias.

Pretty tasty I'd say, but not for everyone. Kinda like asking a sprinter to pull a cart. As has already been stated, a locost is a more logical place to put one of those.
March 31, 2010 8:19 a.m. Tom Heath Marketing / Club Coordinator

RossD wrote:

I think I'm the only one not floored by this. I love engine swaps but in a car the size of a miata I'd rather see a 2.3 duratech/mzr with a bunch of Cosworth parts and/or a turbo thrown at it. The Busa V8 is a different beast though, but its an engine that none of us will likely see because of its high price. Will the weight savings amount to more of an advantage in using the Busa 4cylinder than the dyno's slight increase suggests?

You aren't the only one. Cool idea, but not on a Miata IMHO.
March 31, 2010 8:31 a.m. rjones33 New Reader

4cylndrfury wrote:

Best
Birthday
EVAR!

Aaaaand the the Internet will not get any cooler today than this. Thank you. [signs off]
March 31, 2010 9:37 a.m. Adrian_Thompson HalfDork

I don't know, there are 2,000lb CSP Miata's out there. Take off another 200lb's with a Busa engine and that's 1,800lb's. Now those CSP cars have stock suspension arms and subframe, that sounds like another 100lb's potential. Now we're down to 1,700lbs

Now to me a very stripped out Miata makes more sense in this country than a Se7en due to the possibility of being hit by another car.

People put far smaller bike engines than Busa's in 1,100lb Locosts.

Add in a 150 - 200lb driver and the % change in weight get's even smaller.

I think it could work really well.
March 31, 2010 10:03 a.m. tuna55 HalfDork

Adrian_Thompson wrote:

I don't know, there are 2,000lb CSP Miata's out there. Take off another 200lb's with a Busa engine and that's 1,800lb's. Now those CSP cars have stock suspension arms and subframe, that sounds like another 100lb's potential. Now we're down to 1,700lbs

Now to me a very stripped out Miata makes more sense in this country than a Se7en due to the possibility of being hit by another car.

People put far smaller bike engines than Busa's in 1,100lb Locosts.

Add in a 150 - 200lb driver and the % change in weight get's even smaller.

I think it could work really well.

I am with ya - plus the gear reduction and there is literally nothing lost.
March 31, 2010 11:11 a.m. EvanB HalfDork

I think it would be a pretty cool swap in a MG Midget as well.
March 31, 2010 12:12 p.m. kreb Dork

What certainly is cool is how diametrically opposite this is from the LSX approach. Both will end up a good deal higher performing than a stock Miata, but one route is about displacement and braun, while the other is about light weight and amazing HP/lb. ratios. As has been said elsewhere, the Miata is the modern equivalent of the postwar model T. A cheap canvas for all sorts of expresssions.

That said, the Hayabusa probably won't be a lot cheaper than the basic LSX conversion, and will be slower in most situations, but it's kinda like women. The LSX is voluptuous, whilst the Hayabusa is lithe. I'd gladly take either one.
March 31, 2010 12:55 p.m. Adrian_Thompson HalfDork

kreb wrote:

What certainly is cool is how diametrically opposite this is from the LSX approach.

Excellent point. I just don't GET V8 Miata's, but this stirs places in me that car's just shouldn't stir!

I think it comes from the fact I used to own a Supercharged Mustang and enjoyed it much more with less power. Same goes for driving cars like Vipers with 500hp, I just don't enjoy them on the road. As soon as you get on it, you have to lift off and hit the brakes. I absolutely loved my old Miata, my Mustang with an NA 351, my in laws 85 Vette (L98 and auto), my SVT Contour and many others. I think what it is, is that I like to be able to wind a car through it's rev range without being really stupid on the street. With all the car's I define as fun, they either have a large rev range or a very torquie bottom end. In either case I can exit a corner/junction/turn in 2nd foot to the floor and take it up to the red line and lift off as I need to change up. While traveling quickly I'm not in jail bait territory.

Now autocross and track may be different, but I don't want the feeding bills for tires/brakes/maintenance/wear items that go along with a 500+ hp track car, again I'd go small and light. Admittedly this is the diametrically opposed view to what I thought 15 years ago when I moved here from Europe where small was all you could get.

Nothing wrong with either path, but for me smaller and lighter is good. Said by the guy with a 3,200lb Volvo DD! Hypocrite!
March 31, 2010 1:30 p.m. kreb Dork

Now autocross and track may be different, but I don't want the feeding bills for tires/brakes/maintenance/wear items that go along with a 500+ hp track car,
Point well taken. My Stalker ran the same tires and brakes for 2+ years of driving, track days and autocrosses. 1500 lbs. is a lot easier on consumables.
March 31, 2010 7:18 p.m. Rufledt Reader

i think they said they're gonna turbo it too. or atleast dave coleman said so in the comments. i read the post and after they said they're gonna try to mass produce the kit, i looked at my girlfiend and said "we're gonna have to get you a miata!" and she looked happy. my cousin smashes a bike a year on average i think so the next hayabusa he crashes i could ask to buy it lol
Oct. 8, 2010 12:29 a.m. eyesoreracing New Reader

Just so you don't forget about us...

http://www.motoiq.com/magazine_articles/articletype/articleview/articleid/1704/pro...

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