Sciaru BRZFRS (BreezeFrees)

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Red license plates in Germany are "dealer" plates that get issued to a person/company rather than a specific vehicle. They are only allowed to be used for short periods, as in test drives before a car purchase.
 


Throw two motorcycle V4s together, get a 2.4L V8. Stick it in a BRZ. Make that fizzy feeling return down below.

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They've got a special edition available in Japan

...and I'll say that I like it. A lot. Sure, its a little ridiculous... Especially, without major improvements to the rear. But, making it look like a totally different car from the front? Could help sales a bit?
 


Throw two motorcycle V4s together, get a 2.4L V8. Stick it in a BRZ. Make that fizzy feeling return down below.

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toyota-86-style-cb-03-1.jpg


They've got a special edition available in Japan

...and I'll say that I like it. A lot. Sure, its a little ridiculous... Especially, without major improvements to the rear. But, making it look like a totally different car from the front? Could help sales a bit?

I... Actually dig that quite a bit.
 
I hope that kind of stuff catches on. A 2.4L V8 that revs to 11k RPM is way cooler than any LS crap.

370hp (and torque to match it's 2.4 liters) for likely $20k+ (low estimate) is kind of a hard sell compared to a box stock LS3 which makes more power and WAAAY more torque, is probably not much heavier, and is stupid cheap. I definitely prefer this little screamer, but the numbers don't really support it.

I'd like to see a 20BPP in a ZN6. Much more usable powerband (as much as I like sky-high redlines, it necessitates proportionally very low torque, not ideal for a 'heavy' car like the GT86*) far more power, and sounds even better. Probably lighter and more reliable as well.

*heavy is very relative here. Most things revving to 11,000rpm are at least 1,000lbs lighter I would imagine.
 
I hope that kind of stuff catches on. A 2.4L V8 that revs to 11k RPM is way cooler than any LS crap.
It won't catch on over here. It might be cooler but it's also more delicate and will be less reliable over the long run. Dem piston speeds doe. The future of the internal combustion engine is one of low engine speeds and broad torque curves.
 
It won't catch on over here. It might be cooler but it's also more delicate and will be less reliable over the long run. Dem piston speeds doe. The future of the internal combustion engine is one of low engine speeds and broad torque curves.

There are obviously many more factors, but a 2.4 liter with a 55mm stroke has actually considerably less piston speed at 11,000rpm than a 6.2 liter with a 92mm stroke (LS3) does at 7,000rpm (66fps vs 70fps). Then figure that the LS3 also has much heavier pistons (they are much bigger) and the inertial loads on the rods/journals/wrist pins are a lot higher in an LS3 at 7,000rpm compared to this little V8 at 11,000rpm.
 
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...and I'll say that I like it. A lot. Sure, its a little ridiculous... Especially, without major improvements to the rear. But, making it look like a totally different car from the front? Could help sales a bit?
I like it too, but when I wrote an article on it I was surprised how many people on the social meejas disliked it. A rather concerning number of people likening it to a Mitsubishi Eclipse too.
 
Bike-engine based car engines only make sense in a lightweight or a track-focused car (often the same thing) They're not designed with torque figures in mind because bikes are so light in comparison. They're an interesting vanity project at best.
 
Easy to say when you're not the one who has to drive and fix it on the reg.
If I had won the power ball last night, I'd be calling JUN up as soon as I had cash in hand. That's one of the best parts about being a car enthusiast, maintaining your projects. If you ever expect a project car to be so perfect that it requires no maintenance, you're in the wrong hobby.
 
If I had won the power ball last night, I'd be calling JUN up as soon as I had cash in hand. That's one of the best parts about being a car enthusiast, maintaining your projects. If you ever expect a project car to be so perfect that it requires no maintenance, you're in the wrong hobby.

How's the black and white world these days?
 
Bike-engine based car engines only make sense in a lightweight or a track-focused car (often the same thing) They're not designed with torque figures in mind because bikes are so light in comparison. They're an interesting vanity project at best.
While that's generally the case, I'm not as sure it applies when the total displacement is 20% greater than that of the production car. I doubt it's the most relaxed car to drive but I'd be surprised if it feels less punchy on the road - even the standard car makes its torque peak at 6400rpm.
 
While that's generally the case, I'm not as sure it applies when the total displacement is 20% greater than that of the production car. I doubt it's the most relaxed car to drive but I'd be surprised if it feels less punchy on the road - even the standard car makes its torque peak at 6400rpm.

It was more a comment on bike-engined V8 vs traditional, quarter of the price V8.

Whilst I like the idea of them, they have limited realistic use in most road cars.
 
When the choice is between listening to a 11,000RPM scream or an obnoxious guttural burp, I'd accept any tradeoffs the 2.4L makes compared to an LS. :lol:
 
When the choice is between listening to a 11,000RPM scream or an obnoxious guttural burp, I'd accept any tradeoffs the 2.4L makes compared to an LS. :lol:

...because there's nothing "obnoxious" about a street engine that needs an S2000's worth of revs to wake up? :P

Interesting that the V8 takes weight off the front though, and changes the front/rear distribution by 2%. For over 2 times the price of the base car itself, I suppose I'd expect that.
 
...because there's nothing "obnoxious" about a street engine that needs an S2000's worth of revs to wake up? :P
Indeed, by the point my Ninja reaches its torque peak, an S2000 has already redlined. My answer is no. :P

I think it makes sense for an engine to be Dr. Jekyll around town, and Mr. Hyde when you downshift for it. I know such naturally-aspirated gems won't last long, like Keef said. The Toyobaru is already pretty close to my bike in straight line performance and character, and assuming it doesn't weigh any more than stock, the JUN BRZ has a better torque/weight ratio (~198lb.ft if you guys didn't notice in the video).
 
Aren't motorcycle engines worse than car engines in terms of reliability and endurance? If not, I wouldn't mind putting two welded V4 engines into my Corolla :lol:
 
Aren't motorcycle engines worse than car engines in terms of reliability and endurance? If not, I wouldn't mind putting two welded V4 engines into my Corolla :lol:
Not sure if that will fit...

Anywho, there is an engine similar to the one used in the JUN BRZ, and it's called the Hartley V8.
 
Aren't motorcycle engines worse than car engines in terms of reliability and endurance?
Mostly because of how they spend more time in disuse and are typically run hard when used, I think. Also, smaller parts may wear out more quickly.

There are bikes that have rolled over their 5-digit odometers.
 
I can imagine the engine being lighter. The Hartley V8 package (twin Hayabusa) is also very, very light, and that's a 400 hp, 2.8 liter motor.

But these are race engines, guaranteed for hours of use between rebuilds rather than hundreds of thousands of kilometers. I recall Palatov uses them for the DP chassis, and the original, only a few years old, already needs a rebuild. (This car isn't a daily driver, mind)

It's not just about piston speeds... it's about lightweight construction and internals necessary for use in a bike, and tight tolerances needed for those engine speeds at that weight... and everything is custom-made.

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If this car is $70k with everything, including the donor car, that's a good deal. But I'm thinking this is $70k for mods only.
 
The internet makes it a bit too easy to focus on the highlights of these super creative engines.

I would love to drive a custom bike engined car, even own one, but there's no pretending that the cost-benefit difference between one of those and a robust V8 for those of us who aren't speed shops is anything but dramatic.
 
Just want to share the engine spec :

The Synergy V8 uses 2 I4 motor cycle engine at 1.2L each ( Kawasaki Ninja ZX-12R I4 - with approx 180PS ), combined at 2.4 L NA V8, it outputs 367.5PS / 10680rpm and 27.3kgf-m / 7970rpm, compression ratio 12.3:1. The dyno graph and some more pictures :

Synergy BRZ :

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I think if I have the car, I would love to rev the engine from around 6k-11k all day :D
 
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The internet makes it a bit too easy to focus on the highlights of these super creative engines.

I would love to drive a custom bike engined car, even own one, but there's no pretending that the cost-benefit difference between one of those and a robust V8 for those of us who aren't speed shops is anything but dramatic.
My point is that if a V8 like the LS isn't your cup of tea, cost/benefit arguments are meaningless. We don't care.

But there are certainly other sensible options to consider.
 
My point is that if a V8 like the LS isn't your cup of tea, cost/benefit arguments are meaningless. We don't care.

But there are certainly other sensible options to consider.

I wasn't directly addressing your points, but they are valid.

I think it's a bit silly that we're comparing a full custom $50,000+ engine swap to a garage mechanic level V8 swap.

Of course this is cooler than a factory V8. This is the stuff car guys dream of building.
 
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