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Can Rx8's produce big power like the Rx7?please view
Ok guys,(my apologies if this is a re-post!) I need confirmation on this but there is a big argument on the irish rotary forum that i'm a member of that Rx8's can produce big power.I disagreed that they could but thats just from sources in the rotary world.We all know what fd's can do with the right money and tuning and the reason i'm posting this up in the 3rd gen specifics is coz there is a few comparisons between the 7's and 8's (just so the moderators know!).There are quite a few 8's over here and I don't know if there are many over there but if anyone can post up some information about it that would be awesome.Here's the link of the argument so you get the jist.Note of warning,there is a lot of crap posted up!!!!:lol:
http://www.irishrotary.com/forum/php...?p=22807#22807 |
We're not here to help you win an internet argument. Do a little research yourself before spouting off on internet forums, who really cares anyway? You don't get a prize for being right. Go check out www.rx8club.com and read for yourself.
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Through design, the renesis cant make power like the REW.
It wasnt designed to be power efficient IMO, it was designed to be more fuel efficient IIRC which they still failed at doing. |
How much money do you have?
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Sure it can... just fill the ports in on the irons and go peripheral port intake and exhaust. ;)
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Originally Posted by cabaynes
(Post 8997103)
We're not here to help you win an internet argument. Do a little research yourself before spouting off on internet forums, who really cares anyway? You don't get a prize for being right. Go check out www.rx8club.com and read for yourself.
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Originally Posted by Miata_mx5
(Post 8997147)
How much money do you have?
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Originally Posted by 1QWIK7
(Post 8997127)
Through design, the renesis cant make power like the REW.
It wasnt designed to be power efficient IMO, it was designed to be more fuel efficient IIRC which they still failed at doing. |
I think some guys in PR managed 500hp but those guys are insane. I remember watching a BM video with a 500hp rx8 but it had a REW in it hahahaha. I think because of some side ports or something, boosting a renesis to really high power levels is not easy to do. Im guessing that is what the argument comes down to right? 13b-rew vs. renesis?
This is something you could look up easily. Its been asked many times. |
Yes, but the FE only makes 5hp less than the FD stock
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Im confused, whats the paint your trying to make?
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Originally Posted by Supernaut
(Post 8997599)
I think some guys in PR managed 500hp but those guys are insane. I remember watching a BM video with a 500hp rx8 but it had a REW in it hahahaha. I think because of some side ports or something, boosting a renesis to really high power levels is not easy to do. Im guessing that is what the argument comes down to right? 13b-rew vs. renesis?
This is something you could look up easily. Its been asked many times. |
The main reason is different exhaust ports. Potentially, the renesis can make just as much power, BUT you have to be VERY careful.
You have to remember, the higher the boost you are running at, the harder it is to spin up that turbine, and the more back-pressure you will have because of that. Under high boost, back pressure builds up in front of the turbine. It sometimes reaches critical levels where the side ports on the renesis get warped, and you need a new engine. This is not such an issue on the REW, because of the apex seal being beafier and wider than the side seals, also, the exhaust is pushed out in a straight line in the REW rather than at an angle as it is in the Renesis. Finally, the single exhaust port is simply BIGGER which allows for stronger pulses that can have more force to push through the turbo. Also, the bigger exhaust port allows more room for the exhaust gases to be compressed and not do damage. I would imagine, however, that with a straight-pipe and a correctly set-up cooling system, you could push just as much power of the renesis. Tell me what you think about my theory |
Originally Posted by stinksause
(Post 8998250)
The main reason is different exhaust ports. Potentially, the renesis can make just as much power, BUT you have to be VERY careful.
You have to remember, the higher the boost you are running at, the harder it is to spin up that turbine, and the more back-pressure you will have because of that. Under high boost, back pressure builds up in front of the turbine. It sometimes reaches critical levels where the side ports on the renesis get warped, and you need a new engine. This is not such an issue on the REW, because of the apex seal being beafier and wider than the side seals, also, the exhaust is pushed out in a straight line in the REW rather than at an angle as it is in the Renesis. Finally, the single exhaust port is simply BIGGER which allows for stronger pulses that can have more force to push through the turbo. Also, the bigger exhaust port allows more room for the exhaust gases to be compressed and not do damage. I would imagine, however, that with a straight-pipe and a correctly set-up cooling system, you could push just as much power of the renesis. Tell me what you think about my theory If it can be done in the renesis engine why is it so rare to see a tuned,modified or single turbo 8 on the roads:scratch:?I haven't seen or heard of one here or in the uk.I've actually seen more bugatti veyrons!!!:hahaha: |
Originally Posted by stinksause
(Post 8998250)
The main reason is different exhaust ports. Potentially, the renesis can make just as much power, BUT you have to be VERY careful.
You have to remember, the higher the boost you are running at, the harder it is to spin up that turbine, and the more back-pressure you will have because of that. Under high boost, back pressure builds up in front of the turbine. It sometimes reaches critical levels where the side ports on the renesis get warped, and you need a new engine. This is not such an issue on the REW, because of the apex seal being beafier and wider than the side seals, also, the exhaust is pushed out in a straight line in the REW rather than at an angle as it is in the Renesis. Finally, the single exhaust port is simply BIGGER which allows for stronger pulses that can have more force to push through the turbo. Also, the bigger exhaust port allows more room for the exhaust gases to be compressed and not do damage. I would imagine, however, that with a straight-pipe and a correctly set-up cooling system, you could push just as much power of the renesis. Tell me what you think about my theory |
True .... but you will run into the next weak link - the plastic intake manifold that likes to explode under high boost ... i was in the market for an 8 for a while .... until i decided to go fd. Honestly, if I did get an 8, I would try to keep in N.A for a while ... then I would go with the greddy and then the greddy turbo delete kits ... straight pipe, custom intake manifold and would get 350-400 at wheels ... i dunno about reliability though
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I wish I could get my hands on race-spec renesis 3 rotors though!
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Originally Posted by 13bturbofc
(Post 8998794)
so then i have the perfect solution to that problem...supercharger! haha im planning on putting either the pettit or the new hymee rx8 supercharger kit in my rx8 this summer..guys are making 350whp with a bone stock motor at only 8psi. so im sure there is much room for improvement..
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Its starting to sound like just sticking a 13b-rew would be easier.
I really would like to get an LSx inside an 8 real bad. That would make a fun dd. |
^um no
RX = rotary piston = gtfo |
It basically comes down to it that you can't take an 8,port it,up the injectors and stick,lets say for instance a t78 in it (or a big turbo kit thats compatible for the 8!) and expect big hp figures.I just said those mods coz they're the basic big mods on an fd,feel free to correct me!!!
I would consider getting an 8 if the other half told me she was foaling and we needed the back seats for a baby seat,otherwise i'm staying fd for now!!!! |
Originally Posted by stinksause
(Post 9000349)
True .... but you will run into the next weak link - the plastic intake manifold that likes to explode under high boost ... i was in the market for an 8 for a while .... until i decided to go fd. Honestly, if I did get an 8, I would try to keep in N.A for a while ... then I would go with the greddy and then the greddy turbo delete kits ... straight pipe, custom intake manifold and would get 350-400 at wheels ... i dunno about reliability though
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I dunno how good supercharges are for an already low torque motor tho ... on a rotary, I would still go for turbo. I think Mazda is moving in the right direction with keeping it NA with direct injection.
http://www.mazda.com/mazdaspirit/rotary/16x/ |
Originally Posted by stinksause
(Post 9000356)
I wish I could get my hands on race-spec renesis 3 rotors though!
The current NZ dollar currency exchange against the US makes for a real bargain. The Puerto Rico Major League RX-8 car runs one. This is also the only car in the world to have run under 7 seconds with a Customer Crate Rotary engine Package. |
Originally Posted by stinksause
(Post 9002753)
I dunno how good supercharges are for an already low torque motor tho ... on a rotary, I would still go for turbo. I think Mazda is moving in the right direction with keeping it NA with direct injection.
http://www.mazda.com/mazdaspirit/rotary/16x/ well you should go over to rx8 club and do some reading..people are just bolting on the supercharger and reflashing the ecu and they are making 330 whp at only 7psi |
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