Would this be worth it?
01-17-06, 08:55 PM
#27
Fc3s 4 life
Originally Posted by bunnybunny
no the heart of the racing beat true dual system is the fact that it is actaully truely a dual exhaust.
two seperate pipes all the way back.
not a header leading to a collected exhaust.
two seperate pipes all the way back.
not a header leading to a collected exhaust.
01-17-06, 09:07 PM
#28
Originally Posted by rx7legend
rb true dual system, custom true dual system is going to give you the same hp, i know this is you're car man and you want to put what you want, but you're seven is an n/a no matter what exhaust you get you are not going to se a huge hp just for putting it thats why i tell you to just buy the mufflers and do the pieces custom it will sound the same as if you have the rb true dual system. the sound of the system if the mufflers if you put that mufflers in a custom exhaust is going to sound the same. in the other hand if you we're turbo i would tell you to buy the rb true dual exhaust because youre going to see a pretty nice hp gain, the rb web site said it had a 59hp increase in a 87 TII. i have it and it's great but if my TII we're an n/a i would've go with single or custom exhaust. just my opinion cause $800 bucks don't come in cereal boxes. like i said is your car, your money and you spend it in what you want.
01-17-06, 10:05 PM
#29
Rotary Enthusiast
Thread Starter
yeah the turbo comes off into a single down pipe...
but the true dual exhaust does not sound the same as a collected system. and i'm not getting the exhaust for a huge gain.
you can't get the sound of a true dual system with any collected system.
and this thread is sorta getting a little off topic..
ok its completely off topic, because it was supposed to about if all the things i listed were worth it, not if if the true duals were worth it
but the true dual exhaust does not sound the same as a collected system. and i'm not getting the exhaust for a huge gain.
you can't get the sound of a true dual system with any collected system.
and this thread is sorta getting a little off topic..
ok its completely off topic, because it was supposed to about if all the things i listed were worth it, not if if the true duals were worth it
01-17-06, 10:18 PM
#30
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The idea behind the true duals set up (last I read anyway) is too keep the exhaust pulses from the front and rear rotors seperate. Friend of mine had it and said he didn't find the increase in power was worth the extra weight. I don't have the #'s though. He went back to a rb header and collected 2.25" exhaust with a single muffler. Sounds beautiful. All the power to you. Good luck whatever you do.
Brent
Brent
01-17-06, 10:39 PM
#32
'86 N/A Phone Dials
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I'm not an RX-7 exhaust expert.
But you cannot treat the Rotary like an Otto 4-cycle when it comes to exhaust performance.
The thing about the Rotary engine is that it has alot of pro's, con's, and operational properties of quite a few different air standard cycles, including, but not limited to, Otto 4-cycle and 2-cycle.
Most 2-cycle engines have a collected exhaust that the pressure wave hits and bounces back into the exhaust chamber. The length from the exhaust port and the collector determines at what RPM you want the best power.
I don't know the exact tuning science done with rotary's, but I would place a small wager that it has alot to do with what I have just mentioned.
This is why true duals may improve slightly on stock applications, but a collected exhaust will give you the numbers and power you want. I'm sure there is a cat-back dual muffler system out there that will give you the sound that you are looking for. I personally cannot stand the sight/sound of a single exit exhaust for street applications.
But you cannot treat the Rotary like an Otto 4-cycle when it comes to exhaust performance.
The thing about the Rotary engine is that it has alot of pro's, con's, and operational properties of quite a few different air standard cycles, including, but not limited to, Otto 4-cycle and 2-cycle.
Most 2-cycle engines have a collected exhaust that the pressure wave hits and bounces back into the exhaust chamber. The length from the exhaust port and the collector determines at what RPM you want the best power.
I don't know the exact tuning science done with rotary's, but I would place a small wager that it has alot to do with what I have just mentioned.
This is why true duals may improve slightly on stock applications, but a collected exhaust will give you the numbers and power you want. I'm sure there is a cat-back dual muffler system out there that will give you the sound that you are looking for. I personally cannot stand the sight/sound of a single exit exhaust for street applications.
Last edited by Needa13b; 01-17-06 at 10:42 PM.
01-17-06, 10:42 PM
#33
Rotary Enthusiast
Thread Starter
all i know is, racing beat made the exhaust, so obviously, it has its gains.
I don't think Racing Beat would provide a performance exhaust that gave no performance gains
I don't think Racing Beat would provide a performance exhaust that gave no performance gains
01-17-06, 10:46 PM
#34
Rotary Enthusiast
Thread Starter
and its really sorta impossible to recreate the sound of a true dual system with a collected exhaust.
the true duals sounds almost like two seperate cars.
and i can't stand a single exit exhaust.. yuck
the true duals sounds almost like two seperate cars.
and i can't stand a single exit exhaust.. yuck
01-17-06, 10:50 PM
#35
'86 N/A Phone Dials
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Well, I would suggest that you e-mail RB. Ask them what applications the true duals will compliment the most. It may sound something like this:
"1986-92 RX-7 Road Race Dual Exhaust System
The ultimate in exhaust performance for your non-turbo RX-7! This Road Race system can be used with your stock mufflers, or Racing Beat replacement mufflers. For custom applications, purchase these items separately to form your own exhaust system - the possibilities are endless! Follow the System Details link for complete information on the system components."
Notice the words, Road Race. I imagine you are not keeping this as a, track only car. If you are looking for advice from a guy still running his stock exhaust system, but has a grip on the thermal dynamics of engines, go with a collected system for power.
"1986-92 RX-7 Road Race Dual Exhaust System
The ultimate in exhaust performance for your non-turbo RX-7! This Road Race system can be used with your stock mufflers, or Racing Beat replacement mufflers. For custom applications, purchase these items separately to form your own exhaust system - the possibilities are endless! Follow the System Details link for complete information on the system components."
Notice the words, Road Race. I imagine you are not keeping this as a, track only car. If you are looking for advice from a guy still running his stock exhaust system, but has a grip on the thermal dynamics of engines, go with a collected system for power.
01-17-06, 10:54 PM
#36
Rotary Enthusiast
Thread Starter
actually... i am hoping to road race my fc.
i have another car for a daily driver. i've wanted to start out road racing and eventually work my way to drifting after i learn how to push my car to its limits.
if i wanted my fc to drive on the streets, i wouldn't have pulled my engine.
i have another car for a daily driver. i've wanted to start out road racing and eventually work my way to drifting after i learn how to push my car to its limits.
if i wanted my fc to drive on the streets, i wouldn't have pulled my engine.
01-18-06, 02:14 PM
#39
Originally Posted by Needa13b
I'm not an RX-7 exhaust expert.
But you cannot treat the Rotary like an Otto 4-cycle when it comes to exhaust performance.
The thing about the Rotary engine is that it has alot of pro's, con's, and operational properties of quite a few different air standard cycles, including, but not limited to, Otto 4-cycle and 2-cycle.
Most 2-cycle engines have a collected exhaust that the pressure wave hits and bounces back into the exhaust chamber. The length from the exhaust port and the collector determines at what RPM you want the best power.
I don't know the exact tuning science done with rotary's, but I would place a small wager that it has alot to do with what I have just mentioned.
This is why true duals may improve slightly on stock applications, but a collected exhaust will give you the numbers and power you want. I'm sure there is a cat-back dual muffler system out there that will give you the sound that you are looking for. I personally cannot stand the sight/sound of a single exit exhaust for street applications.
But you cannot treat the Rotary like an Otto 4-cycle when it comes to exhaust performance.
The thing about the Rotary engine is that it has alot of pro's, con's, and operational properties of quite a few different air standard cycles, including, but not limited to, Otto 4-cycle and 2-cycle.
Most 2-cycle engines have a collected exhaust that the pressure wave hits and bounces back into the exhaust chamber. The length from the exhaust port and the collector determines at what RPM you want the best power.
I don't know the exact tuning science done with rotary's, but I would place a small wager that it has alot to do with what I have just mentioned.
This is why true duals may improve slightly on stock applications, but a collected exhaust will give you the numbers and power you want. I'm sure there is a cat-back dual muffler system out there that will give you the sound that you are looking for. I personally cannot stand the sight/sound of a single exit exhaust for street applications.
.PS: I did change to dual again, poor single is going off to some lucky kid
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