1.6L Rotary for the next RX7?
#51
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we are talking "rear wheel horsepower". Our U.S. models have 232 hp but on a dino only about 185-200 "rear wheel horspower". Your 250 hp model would not have more than 210-220 at the wheels. Only a few extra horses are achieved through intake and exhaust mods. Not nearly enough to get you to 62 mph in 4.8 seconds.
#52
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Someone from the old 2007 rx8 thread that used to be bumped all the time talked about having inside sources, claiming that a rotary with more displacement (16B) would eventually come out, but wrongly said for the 2007 model. I can see it happening later, seems like a realistic rumor.
https://www.rx8club.com/showthread.p...ghlight=inside
https://www.rx8club.com/showthread.p...ghlight=inside
Look, Mazda is not going to give up on its flagship sportcar. OF COURSE there will be a Mazdaspeed RX-8, but we may have to wait until the 2008 MY.
Right now Mazda has been going crazy with their 2.3 liter four cylinder FI engine, 274 HP in the Mazdaspeed 6, 250 HP in the just announced Mazdaspeed 3. This engine will no doubt find its way into the MX-5 as well. So right now you can can buy a Mazda 6 with 42 HP more than a RX-8.
Does anyone really think that Mazda is going let this situation continue?
As I have said before in this discussion, I foresee a 23% displacement increase for the RX-8. 1.6 liters by Mazda's method. This will increase power, and perhaps more importantly, responsiveness at lower RPM's.
Also, at some point there will be a Mazdaspeed RX-8 that will be a Forced Induction version of the new 1.6 liter rotary . This car will have a significantly more power than the Mazdaspeed 6, thus restoring the power hierarchy to the Mazda line.
- Nucleus
Right now Mazda has been going crazy with their 2.3 liter four cylinder FI engine, 274 HP in the Mazdaspeed 6, 250 HP in the just announced Mazdaspeed 3. This engine will no doubt find its way into the MX-5 as well. So right now you can can buy a Mazda 6 with 42 HP more than a RX-8.
Does anyone really think that Mazda is going let this situation continue?
As I have said before in this discussion, I foresee a 23% displacement increase for the RX-8. 1.6 liters by Mazda's method. This will increase power, and perhaps more importantly, responsiveness at lower RPM's.
Also, at some point there will be a Mazdaspeed RX-8 that will be a Forced Induction version of the new 1.6 liter rotary . This car will have a significantly more power than the Mazdaspeed 6, thus restoring the power hierarchy to the Mazda line.
- Nucleus
Last edited by Raptor2k; 07-11-2007 at 04:53 PM.
#53
Nope
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im also begining to grow to dig rotaries
becos with a few sensible mods its really quick believe it or not i've done 0-100 in 4.8s only with the following;
Mods that contribute to improving acceleration - NA JDM
-catless midpipe
-MS flywheel
-KNN filter
-lightweight rims (8.2kg)
-coilovers (hard setting)
-MS muffler (dont know if this did anything for the car, cos it already came with it, but its a mod nevertheless)
becos with a few sensible mods its really quick believe it or not i've done 0-100 in 4.8s only with the following;
Mods that contribute to improving acceleration - NA JDM
-catless midpipe
-MS flywheel
-KNN filter
-lightweight rims (8.2kg)
-coilovers (hard setting)
-MS muffler (dont know if this did anything for the car, cos it already came with it, but its a mod nevertheless)
#55
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#57
4.8 sec. 0-60 in a NA RX-8 = NO WAY!
1.6L in next rotary = Mazda better to something to get HP up and 0-60 times down or they have killed the rotary.
Mazda screwed up the RX-8 too. There should have been an FI version of the RX-8 or they should have made the engine bigger to begin with to get HP numbers up (looks like they miscalculated).
1.6L in next rotary = Mazda better to something to get HP up and 0-60 times down or they have killed the rotary.
Mazda screwed up the RX-8 too. There should have been an FI version of the RX-8 or they should have made the engine bigger to begin with to get HP numbers up (looks like they miscalculated).
#60
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In this fantasy land of what will be, I will say that a 1.6 liter direct injection engine would be great, all aluminum would be the icing on the cake, imo.
#62
I'm pretty sure that there are official reference to Mazda's research on a higher displace rotary...but I wouldn't necessarily assume that this means it's going into a new RX7. I'd imagine most of their engineering department (like all 4 of them) are more focused on getting that hydrogen motor perfected.
#63
The sad part is Mazda had the 3 rotor engine out years ago. Yet has done nothing with it.
The 3 rotors are the obvious answer to NA power. Now you just clean up emissions and mpg. You don't have to do anything but get mpg into "near" average. If a guy buys a sports car based on fuel economy than I think you have lost your mind. Sports car = performance first in my opinion. Want good gas mileage? Buy an eco-box. Emissions is a bitch, but Mazda has had how many years with a 3 rotor to figure this out?
If they will stick with 2 rotors, you need to have an FI option. The 2 rotor is going to be underpowered in comparison to its 6 cylinder and 8 cylinder cousins, unless you make a technological breakthrough. However, if you have an FI option than you have the best of both worlds.
Mazda lost its mind by coming out with a purposely raped 4 port engine (which were in the Auto and 5 speed manual) and a 6 port engine (2 versions of NA power???). They could have just had one 6 port NA engine and then a FI version of its 6 port engine.
This time around if they go 2 port, I really hope they use logic and somebody important has this is mind. Have a NA 2 rotor and a FI 2 rotor. If you only want a cool looking sports car then option A. Want performance? than FI option B.
The 3 rotors are the obvious answer to NA power. Now you just clean up emissions and mpg. You don't have to do anything but get mpg into "near" average. If a guy buys a sports car based on fuel economy than I think you have lost your mind. Sports car = performance first in my opinion. Want good gas mileage? Buy an eco-box. Emissions is a bitch, but Mazda has had how many years with a 3 rotor to figure this out?
If they will stick with 2 rotors, you need to have an FI option. The 2 rotor is going to be underpowered in comparison to its 6 cylinder and 8 cylinder cousins, unless you make a technological breakthrough. However, if you have an FI option than you have the best of both worlds.
Mazda lost its mind by coming out with a purposely raped 4 port engine (which were in the Auto and 5 speed manual) and a 6 port engine (2 versions of NA power???). They could have just had one 6 port NA engine and then a FI version of its 6 port engine.
This time around if they go 2 port, I really hope they use logic and somebody important has this is mind. Have a NA 2 rotor and a FI 2 rotor. If you only want a cool looking sports car then option A. Want performance? than FI option B.
#64
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As an add to sosonic's post about a three rotor..
I'm sure that with today's technology, a 3-rotor could be plausible even with the emissions and obsession with gas mileage. There has to be something that they could think of/do to at least get it to pass. Example being: that article that popped up here a while ago saying they were working on another rotary that they were able to up the power and fuel economy. It didn't seem like much, but they still did it.
But, if this bigger displacement rotary is coming, then I'm going to welcome it with open arms.
I'm sure that with today's technology, a 3-rotor could be plausible even with the emissions and obsession with gas mileage. There has to be something that they could think of/do to at least get it to pass. Example being: that article that popped up here a while ago saying they were working on another rotary that they were able to up the power and fuel economy. It didn't seem like much, but they still did it.
But, if this bigger displacement rotary is coming, then I'm going to welcome it with open arms.
#65
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it is a bummer with the emission laws that this world has, but i have faith in mazda finding a way around it if they really want to. as for all this babble concerning MPG i dont think it should have any inpact on sales if they work it right, there target market should be enthusiasts not middle aged ladies buying the automatic option and looking at the city/hwy numbers. also a bigger displacement usually means more fuel consumtion, give and take.
#66
As Mazda can see the rotary engine makes whatever you put it in a niche car. They should acknowledge this and put the Rotary into a lightweight 2 or 2+2 (Kabura) as a focused sports car for the niche market.
That way they can continue the Rotary heritage with more realistic expectations. The RX8 could morph to the MX8 (new body and revised platform) with the 2.3 turbo 4 in it.
That way they can continue the Rotary heritage with more realistic expectations. The RX8 could morph to the MX8 (new body and revised platform) with the 2.3 turbo 4 in it.
#67
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so many rumors, so little facts.
Wait and see we shall...
Wait and see we shall...
#68
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It'd be cool if they just scaled down the dimensions of the two chambers and added a third or fourth chamber to get to 1.6L. Wouldn't this allow it to rev faster and thus produce even more horsepower? This probably wouldn't help on the fuel economy side though.
#69
White RX8 R3
I went to Mazda for an oil change and the mecanic was telling me he went to training for Mazda and he was told that the next 8 will have an 1.6L engine but the excentric shaft will be vertically stretch (not sure how to explain it) to give more torque so the engine will be a little bigger. If this is true I think this could be the best for the renesis.
#70
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That is a cool idea! I could be way off base but a wider diameter E-shaft could work very well. This would let more of the power created by the engine get to the wheels. Kind of like getting a wider grip on a screw driver lets you turn out tight screws easier.
#71
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I went to Mazda for an oil change and the mecanic was telling me he went to training for Mazda and he was told that the next 8 will have an 1.6L engine but the excentric shaft will be vertically stretch (not sure how to explain it) to give more torque so the engine will be a little bigger. If this is true I think this could be the best for the renesis.
#74
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No kidding!!! Every other rx8 owner I see in town is either a woman or old lady! Probably all automatic because every one of them sits on the brake at stop lights too...
#75
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In an age of emissions and gas mileage concerns, the setup that makes that most sense is to make the engine smaller and then turbo it. Go back down to a 12A size and then turbo it to bring it back up to 250 hp or so. More importantly it would also bring average torque up. At the same time the same total intake and exhaust port area would remain the same and you'd have less heat loss to total internal surface area. You "should" also gain mileage this way but that depends heavily on your right foot. A Renesis based 12A or a 10A based 3 rotor Renesis would be really cool if you absolutely had to go larger. Just don't go with a larger 2 rotor. Bad idea. I'm not a supporter of the larger displacement idea. At the very least, leave the size alone. Remember Pontiac's slogan about the widetrack that said "wider is better"? When it comes to rotor width, this is absolutely not true.