andrews_45
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| posted on 16/1/07 at 07:06 PM |
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Like a bike engine... with torque
Looks a bargain to me, anybody fitted one of these?
http://cgi.ebay.co.uk/MAZDA-RX8-ENGINE_W0QQitemZ150081831629QQihZ005QQcategoryZ52640QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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locoboy
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| posted on 16/1/07 at 07:24 PM |
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Spins the wrong way IIRC
ATB
Locoboy
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Project7
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| posted on 16/1/07 at 07:50 PM |
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quote:
Spins the wrong way IIRC
Why couldn't you use the RX8 gearbox and diff? - Wouldnt matter what way it spins.
http://cgi.ebay.co.uk/
MAZDA-RX8-GEARBOX_W0QQitemZ150081495141QQihZ005QQcategoryZ52640QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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cloudy
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| posted on 16/1/07 at 08:05 PM |
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or you could flip the diff in the casing?
James
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iiyama
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| posted on 16/1/07 at 08:09 PM |
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Much heavier then a bike engine.......And not as good as the 13b......
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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jlparsons
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| posted on 16/1/07 at 08:14 PM |
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Not as good as the 13b? I thought it was the same engine further developed? Same power and torque without turbo?
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
shipment. Use only as directed. No other warranty expressed or implied. Do not use while operating a motor vehicle or heavy equipment. Subject to
approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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Volvorsport
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| posted on 16/1/07 at 08:57 PM |
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my mate built a westfield with a rotary engine and box , using a sierra diff .
www.dbsmotorsport.co.uk
getting dirty under a bus
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novacaine
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| posted on 16/1/07 at 09:13 PM |
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apprently the RX8 engine is better than the RX7 in terms of reliability, i.e not having to replace the rotor every 30,00 miles to retain performance
and economy
the RX8 engine is very good, i know someone that drives one, smooth and powerful but crap fuel effeciency but in a 7 who cares? but i think they sound
crap IMHO just a bit too "whirry" instead of the sweet noise of a V8 
Matt
And you run and you run to catch up with the sun but its sinking, Racing around to come up behind you again, the sun is the same in a relative way but
your older, shorter of breath and one day closer to death
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marksimon
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| posted on 16/1/07 at 09:14 PM |
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In my opinion the RX8 engine is a seriously good proposition for lightweight front-engined rear-drive cars.
Where else can you get 230 hp in a small and light package for less than 1K ?
My thoughts:' this engine gives R500 equalling performance ( albeit about 10 kg heavier as an installed package ) with potential for 100+k mile
durabilty all for less than 1K. Compare the power with that for the R500 when the gearing is modified to suit. The RX8 is way better.
Other benefits:
Silky smooth, 9.5k rev limit, 1300cc = low insurance and road tax.
I believe that you can get aluminium housings to get the weight lower than a k-series! Not sure about the costs.
Downsides:
> Image ( do I care ? yeah because I'd like a Cosworth BDG)
> Fuel consumption
> Relative to normal engines, requires a larger silencer and a well insulated exhaust manifold
> ECUs to run rotary engines are less commonly available compared with normal piston engines
> No one else uses one so I'd be on my own with regards to installation, engine mounts, manifold etc
If I were in the market I'd definitely use one of these engines.
P.S. Am I wide of the mark ?
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coozer
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| posted on 16/1/07 at 10:15 PM |
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Goes the wrong way? Put it in the back and drive the front wheels...
[Edited on 16/1/07 by coozer]
[Edited on 16/1/07 by coozer]
1972 V8 Jago
1980 Z750
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russbost
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| posted on 16/1/07 at 10:28 PM |
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I've heard of people using the RX7 lump in 7 type cars & they go like Sh*t off a stick. The Rx8 is even better & who cares if they chew
rotors in 30,000 miles who ever does 30,000 miles in this type of car!!!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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DIY Si
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| posted on 16/1/07 at 11:57 PM |
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Is that the 3 rotor one? I believe some of the hassle could be removed by using carbs. IIRC one of the UK tuners use SU carbs as one of the first
upgrades! Or go silly and use the direct port stuff, simply big, straight tubes that lead to the block with a carb on the end!
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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iiyama
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| posted on 17/1/07 at 11:41 AM |
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quote:
Originally posted by jlparsons
Not as good as the 13b? I thought it was the same engine further developed? Same power and torque without turbo?
Totally different engine!
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iiyama
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| posted on 17/1/07 at 11:42 AM |
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quote:
Originally posted by russbost
I've heard of people using the RX7 lump in 7 type cars & they go like Sh*t off a stick. The Rx8 is even better & who cares if they chew
rotors in 30,000 miles who ever does 30,000 miles in this type of car!!!
30,000 is a myth. Should get at least 60k out of a looked after engine
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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iiyama
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| posted on 17/1/07 at 11:45 AM |
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quote:
Originally posted by DIY Si
Is that the 3 rotor one? I believe some of the hassle could be removed by using carbs. IIRC one of the UK tuners use SU carbs as one of the first
upgrades! Or go silly and use the direct port stuff, simply big, straight tubes that lead to the block with a carb on the end!
The 3 rotor is not a standard engine in either the 7 or the 8. and a 3 rotor would rip a locost chassis tho shreds!! In fact I would suggest that a 7
type car would struggle with a tuned 13b. On stock twins you get around 250bhp as standard although cant remember the torque figures. However these
engines can be tuned to a reliable 360-400bhp on twins and if a single is fitted, like a T51, then 600bhp is easily achievable
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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Memphis Twin
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| posted on 18/1/07 at 12:34 AM |
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Spins the same way as a Ford, which is the "right" way.
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jlparsons
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| posted on 18/1/07 at 06:07 PM |
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Looks like a good compromise to my mind. I like the bike engine idea but I want to use my car everyday and the reliability issue would catch up to me
quick, plus itd be tiring all the time. On the other hand, car engines are heavy and you need to do some serious monkeying about and a lot of
spending to get a power-to-weight that would match a bike engined car.
This is far lighter than a 2 litre lump, has 230 horses straight out the box and revs to 9k. Perfect. Each to their own though. Bike engine would
still be it if I was building a sunday car or track day special.
The big problem is I'm not sure what electrical gubbins are required to get it moving outside the rx-8. For that reason a 90s BMW 6 or a
duratec 4 is probably what I'm aiming for.
Anyone know how to wire up an RX-8 engine then?
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
shipment. Use only as directed. No other warranty expressed or implied. Do not use while operating a motor vehicle or heavy equipment. Subject to
approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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iiyama
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| posted on 18/1/07 at 06:19 PM |
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RX-8 ECU's are a nightmare!
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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jlparsons
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| posted on 18/1/07 at 10:08 PM |
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That's what I thunk. Shame. Still, someone's got to be first. Perhaps I can sweet-talk a mazda service engineer. £3k for a duratec
with equivalent power in far-from-waranteed spec, or a grand for an stock RX-8 engine and end up spending the rest on making it start in a locost.
I think the only way to do it would be to buy a written-off RX-8 with good running gear and take note of everything as you dismantle it. Sell all the
other bits on ebay and might make up the cost too.
Anyone giving it serious thought? Or started one?
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
shipment. Use only as directed. No other warranty expressed or implied. Do not use while operating a motor vehicle or heavy equipment. Subject to
approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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jlparsons
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| posted on 18/1/07 at 10:17 PM |
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quote:
Originally posted by iiyama
quote:
Originally posted by jlparsons
Not as good as the 13b? I thought it was the same engine further developed? Same power and torque without turbo?
Totally different engine!
13B-MSP RENESIS
Mazda RENESIS prototype in the Mazda MuseumThe RENESIS is an evolution of the 13B and first appeared (in production) in the 2002 Mazda RX-8. It is
available in two versions : the standard-power version (222 Nm @ 5000 rpm and 192 hp @ 7200 rpm) and the high-power version (222 Nm @ 5500 rpm and 232
hp @ 8500 rpm). Compare this to the Mazda RX-7's twin turbocharged 13B-REW's 255 hp (190 kW).
wikipedia
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
shipment. Use only as directed. No other warranty expressed or implied. Do not use while operating a motor vehicle or heavy equipment. Subject to
approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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stevebubs
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| posted on 18/1/07 at 10:30 PM |
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OK....wrt electronics....
Bill Shurvinton has been tinkering with getting a Rotary to work with MS for quite a while now, so if you were considering this route then he would be
my first port of call...
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jlparsons
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| posted on 18/1/07 at 11:41 PM |
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Is that the one from the rx-7 or the rx-8? I've seen locosts built with rx-7 engines, look damn good too. I saw one guy who built his chassis
'book' size then was able to shrink it further once he'd fit the engine as he had excess space.
Never seen a locost with the rx-8 engine, though I did search a bit when I was thinking about it for my build. I concluded in the end that it needed
someone with more experience than me to be the trailblazer. I've got at least another 6 months of planning though (baby) before I start looking
for donors, so who knows.
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
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approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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procomp
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| posted on 19/1/07 at 08:34 AM |
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Hi there was also a discussion on the wscc site similar to this one also with input from Bill.
WSCC linky
cheers matt
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jlparsons
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| posted on 19/1/07 at 06:42 PM |
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useful, thanks mate.
Doubt I'll have the guts though to be honest, unless I can assure myself that I can definitly get a renesis running. Perhaps speaking to a
couple if the tuners on that link might do that, but even so a duratec 2.0 is such a tried and tested (and powerful) solution it's hard to pass
up.
Any resemblance to real persons, living or dead is purely coincidental. Some assembly required. Batteries not included. Contents may settle during
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approval, terms and conditions apply. Apply only to affected area. For recreational use only. All models over 18 years of age. No user-serviceable
parts inside. Subject to change. As seen on TV. One size fits all. May contain nuts. Slippery when wet. For office use only. Edited for television.
Keep cool; process promptly.
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