Header!!!!!!!!!!!!!!!!!!!
07-19-2005, 11:08 AM
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Header!!!!!!!!!!!!!!!!!!!
Does Any 1 Any 1 Any 1 Know Were I Can Find Some Headers To Buy For My Rx8.i Saw A Post That Showed Them But I Couldnt Buy Them. So If Any 1 Know Plz Tell Me.
Thank You
Thank You
07-19-2005, 11:16 AM
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I'm assuming English isn't your first language, so I will give you the benefit of the doubt. But you can possibly buy headers at http://www.rotaryextreme.com.
07-19-2005, 11:23 AM
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I don't know what's the deal with getting a header. You won't gain any significant HP from it anyway. Here's what Jim Mederer from Racing Beat has to say:
The following is an update from the desk of Jim Mederer as he shares his thoughts on the progress of his testing:
"Racing Beat is about to come out with a number of products for the new RX-8. Others have already brought products to the market with what we have found to be some rather exaggerated claims. Rather than echo these claims we prefer to report exactly and honestly the results we see. In the long run, the customer will appreciate dealing with reality, not a wish. In the past it was common to see improvements in the exhaust and intake systems of rotary engines in the 12-20 HP bracket, depending on the product. Headers in particular were a great source of power- this is no longer true. Although we are still working on a final header design, we have yet to observe more than a slight horsepower gain. Space is a limiting factor to becoming creative with a header design, and besides, the port configuration is fairly restrictive on the Renesis engine. We have found that Mazda’s exhaust manifold design is actually pretty good. Mazda has already wrung almost nearly everything they can from the engine. The are small improvements possible, but the days of the early rotaries when 10-20 horsepower gains could be realized fairly easily, those days appear to be over."
The following table lists the measured power gains from various aftermarket components. Testing has been conducted on the Racing Beat engine dyno with both pre-production and production Renesis engines.
1. Intake – enlarging the oval inlet to the factory air box - +2 HP (this modification eliminates the VFAD intake duct.).
2. Headers – approximately 4 HP peak power gain.
3. Mufflers – muffler & connecting pipe - 2-3 HP.
4. Removing the muffler from the car (engine) – about 4 HP.
5. Remove catalytic converter and resonator from the engine completely, and replacing with "cat" replacement tube – max benefit 8 HP – regardless of what muffler is used (or even no muffler).
The following is an update from the desk of Jim Mederer as he shares his thoughts on the progress of his testing:
"Racing Beat is about to come out with a number of products for the new RX-8. Others have already brought products to the market with what we have found to be some rather exaggerated claims. Rather than echo these claims we prefer to report exactly and honestly the results we see. In the long run, the customer will appreciate dealing with reality, not a wish. In the past it was common to see improvements in the exhaust and intake systems of rotary engines in the 12-20 HP bracket, depending on the product. Headers in particular were a great source of power- this is no longer true. Although we are still working on a final header design, we have yet to observe more than a slight horsepower gain. Space is a limiting factor to becoming creative with a header design, and besides, the port configuration is fairly restrictive on the Renesis engine. We have found that Mazda’s exhaust manifold design is actually pretty good. Mazda has already wrung almost nearly everything they can from the engine. The are small improvements possible, but the days of the early rotaries when 10-20 horsepower gains could be realized fairly easily, those days appear to be over."
The following table lists the measured power gains from various aftermarket components. Testing has been conducted on the Racing Beat engine dyno with both pre-production and production Renesis engines.
1. Intake – enlarging the oval inlet to the factory air box - +2 HP (this modification eliminates the VFAD intake duct.).
2. Headers – approximately 4 HP peak power gain.
3. Mufflers – muffler & connecting pipe - 2-3 HP.
4. Removing the muffler from the car (engine) – about 4 HP.
5. Remove catalytic converter and resonator from the engine completely, and replacing with "cat" replacement tube – max benefit 8 HP – regardless of what muffler is used (or even no muffler).
07-19-2005, 11:37 AM
#5
this space for rent
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Did you really feel the need to start TWO threads about headers.
And, I'll be this threads token search ****.
USE THE SEARCH, there have been quite a few threads about headers.
And, I'll be this threads token search ****.
USE THE SEARCH, there have been quite a few threads about headers.
07-19-2005, 11:41 AM
#6
RX8 HA HA
Originally Posted by wedge357
I don't know what's the deal with getting a header. You won't gain any significant HP from it anyway. Here's what Jim Mederer from Racing Beat has to say:
The following is an update from the desk of Jim Mederer as he shares his thoughts on the progress of his testing:
"Racing Beat is about to come out with a number of products for the new RX-8. Others have already brought products to the market with what we have found to be some rather exaggerated claims. Rather than echo these claims we prefer to report exactly and honestly the results we see. In the long run, the customer will appreciate dealing with reality, not a wish. In the past it was common to see improvements in the exhaust and intake systems of rotary engines in the 12-20 HP bracket, depending on the product. Headers in particular were a great source of power- this is no longer true. Although we are still working on a final header design, we have yet to observe more than a slight horsepower gain. Space is a limiting factor to becoming creative with a header design, and besides, the port configuration is fairly restrictive on the Renesis engine. We have found that Mazda’s exhaust manifold design is actually pretty good. Mazda has already wrung almost nearly everything they can from the engine. The are small improvements possible, but the days of the early rotaries when 10-20 horsepower gains could be realized fairly easily, those days appear to be over."
The following table lists the measured power gains from various aftermarket components. Testing has been conducted on the Racing Beat engine dyno with both pre-production and production Renesis engines.
1. Intake – enlarging the oval inlet to the factory air box - +2 HP (this modification eliminates the VFAD intake duct.).
2. Headers – approximately 4 HP peak power gain.
3. Mufflers – muffler & connecting pipe - 2-3 HP.
4. Removing the muffler from the car (engine) – about 4 HP.
5. Remove catalytic converter and resonator from the engine completely, and replacing with "cat" replacement tube – max benefit 8 HP – regardless of what muffler is used (or even no muffler).
The following is an update from the desk of Jim Mederer as he shares his thoughts on the progress of his testing:
"Racing Beat is about to come out with a number of products for the new RX-8. Others have already brought products to the market with what we have found to be some rather exaggerated claims. Rather than echo these claims we prefer to report exactly and honestly the results we see. In the long run, the customer will appreciate dealing with reality, not a wish. In the past it was common to see improvements in the exhaust and intake systems of rotary engines in the 12-20 HP bracket, depending on the product. Headers in particular were a great source of power- this is no longer true. Although we are still working on a final header design, we have yet to observe more than a slight horsepower gain. Space is a limiting factor to becoming creative with a header design, and besides, the port configuration is fairly restrictive on the Renesis engine. We have found that Mazda’s exhaust manifold design is actually pretty good. Mazda has already wrung almost nearly everything they can from the engine. The are small improvements possible, but the days of the early rotaries when 10-20 horsepower gains could be realized fairly easily, those days appear to be over."
The following table lists the measured power gains from various aftermarket components. Testing has been conducted on the Racing Beat engine dyno with both pre-production and production Renesis engines.
1. Intake – enlarging the oval inlet to the factory air box - +2 HP (this modification eliminates the VFAD intake duct.).
2. Headers – approximately 4 HP peak power gain.
3. Mufflers – muffler & connecting pipe - 2-3 HP.
4. Removing the muffler from the car (engine) – about 4 HP.
5. Remove catalytic converter and resonator from the engine completely, and replacing with "cat" replacement tube – max benefit 8 HP – regardless of what muffler is used (or even no muffler).
07-19-2005, 01:35 PM
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1000 dollars for 1 hp? sounds worth it to me when u add in the coolness factor :D
but honestly... its funny how on that list of hp gains of intakes exhausts headers and what not.. the headers has more hp then the intake and muffler with connecting pipe yet they didnt come out with headers
interesting.
but honestly... its funny how on that list of hp gains of intakes exhausts headers and what not.. the headers has more hp then the intake and muffler with connecting pipe yet they didnt come out with headers
interesting.
07-19-2005, 02:17 PM
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Well I notice they do say "peak power gain" which may mean it does nothing until you hit 8k rpm or higher. Some products are advertised as adding hp but when you look at the dyno charts it only kicks in at an rpm range you rarely use, or use for very long on the street.
It does say they are working on "finalizing" a design but if it adds only 1hp that's useful across the normal range, and they have to charge $1,000 for it....why bother? The guys at RB are practical and realistic not only in the products they develop but in business practices too.
I'm sure if you do a package of intake, cold air duct, headers and exhaust the combined hp boost might be nice but at what cost? If you get 1hp from cold air duct, 2hp from intake, 4hp from headers and 3hp from exhaust, that's only 10hp combined at best and the price for all that would probably be around $2,000. Not the best bang for the buck. If you drop the headers you still get 6hp but at half the price...not so bad.
When they do finalize a design I'd be very interested to see what the hp difference is with a complete system; duct, intake, header and exhaust compared to stock. The advertised gain on each of those items is with adding that item only to a stock config; together they may produce more than the individual gains normally do.
It does say they are working on "finalizing" a design but if it adds only 1hp that's useful across the normal range, and they have to charge $1,000 for it....why bother? The guys at RB are practical and realistic not only in the products they develop but in business practices too.
I'm sure if you do a package of intake, cold air duct, headers and exhaust the combined hp boost might be nice but at what cost? If you get 1hp from cold air duct, 2hp from intake, 4hp from headers and 3hp from exhaust, that's only 10hp combined at best and the price for all that would probably be around $2,000. Not the best bang for the buck. If you drop the headers you still get 6hp but at half the price...not so bad.
When they do finalize a design I'd be very interested to see what the hp difference is with a complete system; duct, intake, header and exhaust compared to stock. The advertised gain on each of those items is with adding that item only to a stock config; together they may produce more than the individual gains normally do.
07-19-2005, 02:31 PM
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English is my secong language im puerto rican. But i had a 1st gen Rx7 and had put headers on it and ported it there is no sound like it . im praying the renesis will be able to sound the same. But if its for 1whp i wont plan on getting it any time soon.
07-19-2005, 02:39 PM
#12
NeedForSpeed in Spain dynoed 5 HP with the RE Amemiya Header:
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/complete-exhaust-videos-62993/
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/amuse-pics-53063/
Prices are droping to around $600 now that their is competition.
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/complete-exhaust-videos-62993/
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/amuse-pics-53063/
Prices are droping to around $600 now that their is competition.
07-19-2005, 03:00 PM
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Ive been reading and it dosent seem worth it. Im about to get an exhoust and i heard them all but with wich one will i come out better with in the end and with more hp.
Racing Beat Catback Exhoust
Hks Legamax Exhoust
Greddy Sp2 Catback Exhoust
B&B Catback Exhoust.
I was planning on getting Racing Beat but let me c what you all think.
Thanks
Racing Beat Catback Exhoust
Hks Legamax Exhoust
Greddy Sp2 Catback Exhoust
B&B Catback Exhoust.
I was planning on getting Racing Beat but let me c what you all think.
Thanks
07-19-2005, 04:10 PM
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Originally Posted by Velocity Rx8
Ive been reading and it dosent seem worth it. Im about to get an exhoust and i heard them all but with wich one will i come out better with in the end and with more hp.
Racing Beat Catback Exhoust
Hks Legamax Exhoust
Greddy Sp2 Catback Exhoust
B&B Catback Exhoust.
I was planning on getting Racing Beat but let me c what you all think.
Thanks
Racing Beat Catback Exhoust
Hks Legamax Exhoust
Greddy Sp2 Catback Exhoust
B&B Catback Exhoust.
I was planning on getting Racing Beat but let me c what you all think.
Thanks
07-19-2005, 06:51 PM
#20
Bummed, but bring on OU!
No exhaust will give you 10hp, at most 4-5hp (not necessarily at peak). A high flow cat might, but a catback won't. Most catbacks are lighter than stock however. And lighter is good, in my book. A RevI intake, high flow cat, and a good afr tune would probably net you 20 to 30hp over stock (maybe more), depending on your stock afr tune. And you could probably get a few more by messing with the timing a bit. A well tuned piggyback has been the most 'bang for the buck' mod powerwise for a naturally aspirated 8, so far.
07-19-2005, 07:29 PM
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Consider RB, Borla, HKS, Greddy, Hymee, etc. All are good units. None of the exhausts are designed for the Turbo units (though it has been mentioned that Altered Atmosphere might have one). No "regular" cat back exhaust is going to give you 10 whp. Most is about 3 hp. a lot of these claims were on different cars, also were never substantiated (same dyno, same day). RB has a single pipe race exhaust coming out, that will probably give more than 3 whp, but it is up to you if you can handle the look.
07-19-2005, 07:35 PM
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^well yes none of them are designed for a turbo....b/c well our car is NA :p......but that isn't to say that it won't work with one. :D hehe just ask Fanman up there...he has both
07-19-2005, 10:09 PM
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Therm wats a Afr , And how would i or a mechanich tune it. And i seen some Turbo Rx8 With Racing Beat Exhoust. If not if i plan to get the graddy what exhoust should i get.
07-19-2005, 11:19 PM
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Originally Posted by Velocity Rx8
Therm wats a Afr , And how would i or a mechanich tune it. And i seen some Turbo Rx8 With Racing Beat Exhoust. If not if i plan to get the graddy what exhoust should i get.
Exhaust doesn't really matter. none provide more/less hp, even with a turbo kit.