2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Building a solid N/A motor

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Old Jan 19, 2006 | 08:30 AM
  #26  
adrock3217's Avatar
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I don't think I've said in any threads that they make such great power? x.x

If so, whoops - I meant to only be telling people how GREAT they sound..

And if you mean how I said it makes 28% hp more than stock, that's coming from Mazdatrix, not me :P
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Old Jan 19, 2006 | 09:34 AM
  #27  
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Originally Posted by Nitrometano
Make big intake ports, j-bridge in the middle plate,
This is not very good advice. The j-bridge has to be the most unreliable port ever conceived and it's only reason for existence was to get around racing rules that disallowed peripheral ports. There's absolutely no reason to use it on the street or in most track situations. Most j-bridges die due to coolant leaking into the engine as you need to cut the water o-ring to fit the port.

and open the housing exhaust ports, replace the stock appex seals to 3mm Atkins or Hurley.
No need for 3MM seals unless the rotors are too worn to accept 2MM.
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Old Jan 19, 2006 | 09:40 AM
  #28  
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Originally Posted by adrock3217
I don't think I've said in any threads that they make such great power? x.x

If so, whoops - I meant to only be telling people how GREAT they sound..

And if you mean how I said it makes 28% hp more than stock, that's coming from Mazdatrix, not me :P
Can't go believing Mazdatrix. It's never been proven by an unbias party, and you can't really believe what a company is saying about their own product, or a product they used to sell. Next you'll be saying all the Honda companies really do get 10-15hp out of intakes and exhaust tips.
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Old Jan 19, 2006 | 10:44 AM
  #29  
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Point taken, dDuBers :P But I WILL keep preaching the sexy true dual sound!
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Old Jan 19, 2006 | 12:19 PM
  #30  
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Originally Posted by adrock3217
I don't think I've said in any threads that they make such great power? x.x

If so, whoops - I meant to only be telling people how GREAT they sound..

And if you mean how I said it makes 28% hp more than stock, that's coming from Mazdatrix, not me :P
You never shut up about the true duals being the abosolute! You always do so.

28% more power isn't proven. Do you think an e-fan is good for 15HP?And an plain intake for 26HP (K&N). So what is the point you're trying to make? They sound just like the full RB exhaust to me, just a little more hollow . BUT I don't think you should be telling people to buy it if you no truth behind your statements. Sound is only an opinion of whoever.

PM Mazdaspeed7 (from the beefy NA thread) and ask him how he feels about true duals now . You'll be surprised .
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Old Jan 19, 2006 | 12:21 PM
  #31  
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Originally Posted by adrock3217
Point taken, dDuBers :P But I WILL keep preaching the sexy true dual sound!
Make a video at WOT and let people decide then, not when they are trying to make power with their car instead of trying to sound neat. The only tests I've seen has puny 3-4-5k revs. I wanted a redline run under load damn it.


!!!!!!
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Old Jan 19, 2006 | 07:38 PM
  #32  
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Is the RB RoadRace a true Dual System? I have one but I don't thing it is totally seperate. It seems to me that it is collected in the pre-silencer & then split again to two mufflers. I could be wrong. I like mine regardless of the specifics. It seems to be strictly a matter of taste I guess. I was never, ever sorry for buying the full RoadRace setup.

Ramses666
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Old Jan 19, 2006 | 09:45 PM
  #33  
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Originally Posted by ramses666
Is the RB RoadRace a true Dual System? I have one but I don't thing it is totally seperate. It seems to me that it is collected in the pre-silencer & then split again to two mufflers. I could be wrong. I like mine regardless of the specifics. It seems to be strictly a matter of taste I guess. I was never, ever sorry for buying the full RoadRace setup.

Ramses666
Go look at the RB site and compare exhausts and see whichever one looks like the one you own.

!!!!!!
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Old Jan 19, 2006 | 09:48 PM
  #34  
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I think he's talking about the true dual one, "road race."

Look at this pic



That's the "road race presilencer." Like he says, goes into presilencer then splits off again into dual. Not sure if presilencer is truly seperated or if its a single silencer that splits again. Would be pretty funny if it collected and then split!
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Old Jan 19, 2006 | 10:17 PM
  #35  
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Yes... the one in the picture is the one I have... What would be the difference performance wise? I mean...wouldn't it be desirable to have some sort of scavenging to pull the exhaust gases out faster? Or is this incorrect? Would the increase in volume of the presilencer & the addition of another muffler(if the presilencer was collected) make for less back pressure & more flow? It would seem reasonable to me that it might work better & have a quieter tone. Which mine seems to have. Of course I'm not an expert. I previously had a RB collected header and it was pretty loud, but of course the rest of my previous setup was CRAP. Could a collected pre-silencer be why the setup works well? Somebody set me straight on this please.

Ramses666
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Old Mar 12, 2006 | 05:18 PM
  #36  
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d00d I just wanna know if there is a GOOD reason to buy the presilencer... is it going to make that much of a difference if I run the true dual without the presilencer (difference in loudness).

I wanna not get pulled over everytime I drive my car.
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Old Jul 14, 2006 | 04:23 AM
  #37  
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I don't know about the road race setup for the FC, but a friend of mine had the full RB package on his GSL-SE and it had two smaller pre-silencers that were slightly offset. I believe the presilence coming from the front rotor started about 3" before the other, to accomodate for the flanges I guess.
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Old Jul 14, 2006 | 05:28 AM
  #38  
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The stock fuel system starts to run out at ~190-200 rwhp, you might want to reconsider this. The first bottleneck is the fuel pump i believe.
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