Hey, I was wondering if anybody have stuck RE Amemiya's Dolphine Tail/Super Dolphine Tail exhaust on their Rx8? I have been searching through the forum for hours to look for a thread where someone might have talked about the exhaust in detail, but unfortunately I was unable to find it (unless I have done a poor job searching for it? ) In any case, would someone please give me info on this particular exhaust? What is the difference between the regular Dolphine Tail versus the Super Dolphine Tail? What's the weight on those things?? How much horsepowers will I gain from these exhausts? Are they good?? Does anybody have pictures of this exhaust on their Rx8? Just curious, thanks guys.

- Sato

 

Im not sure what they're thinking but with all the bends and curves on the Dolphine exhaust ... I doubt you will see any gains.

Not to mention the price alone is so NOT worth it (for an exhaust)

 

i agree on the price, but Mr. Amemya Has forgotten more than most of us will ever know about rotary's so who knows if it will make power i believe that the reason for the turn down on the exhaust is to send the sound toward the ground to quiet it a bit. i'm probably wrong tho

 

Really? Hmmm, I never really thought of that to be a problem, since knowing how well-known Amemiya-san is, I did not think he would make a product that would defeat the purpose and goal of what he is hoping to achieve, right? I mean, I thought his goal is to tune and increase the power as well as the handling of rotary powered cars, so I did not think he would do something so, pardon my language, "stupid"?? :S

 

i truly doubt you will see any power gains, maybe 3-4 whp. hell they only gained 5 whp by removing muffler completely. mazda squeeked out the most your gonna get from NA w/o tuning. i think the only benefit of this exhaust would be weight reduction/ looks (not so great in my opinion), and sound.

 

hmmm, icic! Well I have listened to a couple of their sounds clips on the RE Amemiya website, and personally I have come to really appreciate how it sounds and how it looks. I am asking these questions because I am contemplating if I should get my hands on a set of these in the future?

 

I read somewhere that the purpose of those bends help increase torque.

 

really? source? I am very interested in reading it! =)!

 

I would like to see the source as well

Im sure Mr Amemiya knows Rotary more than most of us,

but with exhaust designs like that I dunno .......

Im just gonna stick with my original plan, gonna go for HKS

 

you're right nycgps!! hehe!! I mean, I have noticed that in his FD modifications, he uses Greddy turbochargers and not RE Amemiya custom made turbochargers, which means he is still relying on the intelligence and expertise of other companies. On the other hand, I am still hoping that I will hear something good out of this exhaust design, because I am really interested in Amemiya-san's products. I am thinking about getting RE Amemiya's aero package, but I still need to make up my mind about this, haha!!

 

I would suggest you to go for HKS or Racing beat if you want *power*, since I really doubt that with curves like that would get you any increase in power.



Amemiya's exhaust is like what, 3 times the price of HKS or Racing Beat Exhaust ?

To hell with that

They have some good products that I want to get, say I want to get 2 of their 13 rows oil cooler to replace the stock one, cuz I think it can cool alot better, 500 for oil cooler is alright I think,

but not the exhaust.

 

that's a shame! =(! I really do like RE Amemiya! =(!!!! Hmmm, well maybe I will wait a couple of years and see what is out there by RE Amemiya after that! hehe! I am sure couple of years of wait will be worth it, I am in no hurry anyways! =)!!!! Is it just me, or does Rx8 still feels a little "fresh"?? I just seems not a lot of companies are there has released an extremely nice and "perfect" (although I know there can't be any "perfect" in the world) package for the Rx8?? Either that or it could just be my lack of knowledge, haha!!

 

Well keep in mind that the exhaust length is a factor in tuning as well since you can control the exhaust pulses to get a bit more power. It could just be that Amemiya is gunning for an increase in a different part of the rev range compared to others.

 

oh! that is a very good point!! Man, if only we know exactly the motive behind those exhausts! I really do want to know! Ack!!!

 

Every time I see the super dolphin I think of a pro-circuit racing expansion chamber for a 2-stroke dirt bike. The bends in those MX and racing enduro pipes varied depending on the displacement, and are also designed to provide more power at different points in the power band depending on design use (mx vs enduro). I am not saying that the RX8's rotary engine is exactly like a dirt bike, but if there was one engine that could possibly benefit from an exhaust that is designed more as an extractor rather than just a muffler, it would be the high revving low-torque rotary in the RX8.

I just spoke with one of the guys at Corksport yesterday about this exhaust to try and determine if they had actually ever sold one. Based on the comments the answer was yes, but to two different people outside of the United States and no real solid feedback regarding sound or performance. I think its a great looking design and would love to have one, but as I understand it, the design of the system makes it a tough packing and shipping job resulting in high costs over a standard exhaust.

JR

 

Oh, thank you very very much for those information! =)!!!! After reading those things, these exhausts seems so much more useful than I had felt they were a moment ago!! Well, I think I am going to go around the net and search for feedbacks on this exhaust, and hopefully find a forum that compares the Dolphine Tail with the Super Dolphine Tail series. If I find anything interesting, I will definitely report it back here! =)! Thanks a lot guys, for all your inputs; I would continue to enjoy reading how others feel about this exhaust! =)!!

- Sato

 

glad to see someone paying attention and thinking before rushing to judgment. that was my first thought after seeing the photo.

 

hahaha!! nobody is perfect!

 

I'll try to look for that source tonight. But, I'm 100% sure that that's what I read her heard from a video about those bends. I don't remember ever hearing about any performance numbers. I'm thinking that there may be something about this on the Option Magazine web site. I'll check it out.

But, for this price personally this exhaust would not be worth it to me. But, if anyone were to ever get on of these please do post a video and a review. I would love to learn more.

Edit: Sato, I just saw you post above. I guess I'm late. Someone must have already posted information for you. I'll still check for what my source was.

 

I think I remember reading somewhere (maybe in this forum somewhere?) that someone went to the RE Amemiya website and read the claim that it gave them (the Amemiya team) 5-9 (10?) hp gain?? Well, if we can get some translations that would be really nice! hahaha! Or someone who can read Japanese or something, hehehe! =P!!!

 

Thats what Re-Amemiya site saids, 5~10 hp gain, but their HP is diff from our HP.

and I think this exhaust is not *so* good for Turbo/SC applications.

 

Yes, I believe your correct there. I'm pretty sure that I heard that this is to maximize NA setups.

 

If they're cheaper I can give it a shot because I *dont* think I will go turbo/SC until my warranty expire ....

 

you're right. no one is, nor do they need be. however, if a company like Amemiya releases a product, it would seem most likely that there is some extensive R&D that came before. it's not like one of those companies that makes wheels or cigarettes came out with the exhaust - know what i mean?

 

hehe, I do not plan on going turbo at all with an 8! hehehe! =P!!! I like to keep it NA, hehehe! =)!!!! Personal preference! =)!!!