Exhaust question...+
10-23-01, 12:40 AM
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Exhaust question...+
If I buy dual out let headers & have some shop weld straight pipes from the headers back to mufflers will this give enough back pressure to open the 5th & 6th ports? Thanks.
10-23-01, 02:06 AM
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You know that doesn't help unless you can't get them to open, right? They need to open when they were meant to, to get the most out of you car. I was just wondering if anyone knew if there was enough back pressure from the mufflers & header to open them. Thanks though.
10-23-01, 08:10 AM
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no there won't be, you'll need a nice straight pipe or hi-flow cat to create enough back pressure. im trying to do the same thing right now...those 2 last ports are a bitch to work with when re-doing the exhaust 
10-23-01, 08:42 AM
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Originally posted by CYAL8R
no there won't be, you'll need a nice straight pipe or hi-flow cat to create enough back pressure. im trying to do the same thing right now...those 2 last ports are a bitch to work with when re-doing the exhaust
no there won't be, you'll need a nice straight pipe or hi-flow cat to create enough back pressure. im trying to do the same thing right now...those 2 last ports are a bitch to work with when re-doing the exhaust
10-23-01, 09:23 AM
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Look at the diagram at the bottom of my page here http://homepage.mac.com/macimusprime/photo2.html this is how Mind train makes the ports work and it does work very well.
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10-23-01, 09:21 PM
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Originally posted by mprime
Look at the diagram at the bottom of my page here http://homepage.mac.com/macimusprime/photo2.html this is how Mind train makes the ports work and it does work very well.
Look at the diagram at the bottom of my page here http://homepage.mac.com/macimusprime/photo2.html this is how Mind train makes the ports work and it does work very well.
10-23-01, 09:38 PM
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the whole prurpose of installing "straight pipes/cutome exhaust" is to not have to shell out the greenbacks $$$$$$.
If you are going to put 2 pre-silencers $190 each ~$400
+ $150 headers + ~$200 mufflers + ~$100 labor = ~$900
just buy the entire true dual system and don't worry about anything....
Otherwise just go the cheap route and have some pipes made... and wire your 6ports.
If you are going to put 2 pre-silencers $190 each ~$400
+ $150 headers + ~$200 mufflers + ~$100 labor = ~$900 just buy the entire true dual system and don't worry about anything....
Otherwise just go the cheap route and have some pipes made... and wire your 6ports.
10-23-01, 09:51 PM
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Actually going to be headers, $200, presilencers $130 each, so $260, & mufflers, $100 each, so $200. That adds up to $660. Then say $100 for piping and labor. Thats $760. $1400+tax+shipping...prolly around $1500-1600. So say $1500-760=740...if my math is right, lol. Thats almost half off. I definitely think its worth it.
10-23-01, 09:54 PM
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1 yes Im sure Mindtrain would get you a bleeder screw just give them a call.
2 UH I realize you want to fab your own exhuast. Thats why I made the diagram incase anyone else needs a good way to figure out the 6 port problem its not like its a hard fab job a flange welded to whatever pipe is close and a bleeder bolt threaded through the flange, that bolts to the backpressure tube. Thats all.
2 UH I realize you want to fab your own exhuast. Thats why I made the diagram incase anyone else needs a good way to figure out the 6 port problem its not like its a hard fab job a flange welded to whatever pipe is close and a bleeder bolt threaded through the flange, that bolts to the backpressure tube. Thats all.
Last edited by mprime; 10-23-01 at 09:58 PM.
10-23-01, 10:17 PM
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Ya, they are RB presilencers. They are the ones for 1st gens, like 81-85 or something. I called mazdatrix today and he says he uses those in his "full true-dual exhaust system". So the presilencers are $130 each. Saves $140. Always a plus.
I paid like $180 + shipping
10-23-01, 10:25 PM
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Originally posted by RX-7 GT
your spending awfully alot of money just for an exhaust. what is this a drag car
? i always go best bang for the buck
your spending awfully alot of money just for an exhaust. what is this a drag car
? i always go best bang for the buck
Kinda sorta. Its my personal street drag car
I want it as fast as possible in the 1/4 mile thats all. How is $750 on full exhaust expensive though? I know alot of people spend more than that on just a catback that gives them a grand total of 5rwhp. I plan on getting around 20 or more hopefully.
10-23-01, 10:31 PM
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Originally posted by Ryde _Or_Die
Kinda sorta. Its my personal street drag car I want it as fast as possible in the 1/4 mile thats all. How is $750 on full exhaust expensive though? I know alot of people spend more than that on just a catback that gives them a grand total of 5rwhp. I plan on getting around 20 or more hopefully.
Kinda sorta. Its my personal street drag car
I want it as fast as possible in the 1/4 mile thats all. How is $750 on full exhaust expensive though? I know alot of people spend more than that on just a catback that gives them a grand total of 5rwhp. I plan on getting around 20 or more hopefully.
how do honduhs gain rwhp, if they're FWD ?
The type R sticker is wellworth the $20 for 5 hp. I know because I bought one for my honduh lawnmower and now it hauls !!!
10-23-01, 10:33 PM
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Man TIIs don't count, lol. Was that for the single or the dual? Still think that $760 is not a bad price at all. Much better then the $1400 I was saving up. Might even get more gains with my setup, never know.
10-23-01, 10:35 PM
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Originally posted by MaxRX7
yes...
how do honduhs gain rwhp, if they're FWD ?
The type R sticker is wellworth the $20 for 5 hp. I know because I bought one for my honduh lawnmower and now it hauls !!!
yes...
how do honduhs gain rwhp, if they're FWD ?
The type R sticker is wellworth the $20 for 5 hp. I know because I bought one for my honduh lawnmower and now it hauls !!!
Hey, I never said hondas. You know what I am talkin bout anyways, "whp." Front, rear, or 4 wheel, to the wheels though. Just use to putting "rwhp" cuz I have this weird thing that all sports cars should be rwd. Guess thats just me...
10-23-01, 11:19 PM
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I think most people have found that there car is faster in the qtr mile, and has much more low end torque if the 6 ports are closed instead of wired open... I would tend to agree, especially if the car is just your daily driver for school/work/whatever. For your exhaust, get the rb headers, whatver mufflers ya like, and have a muffler shop weld ya up a custom straight pipe. It isn't legal, but hey, what is these days.... 
~Jesse
~Jesse
10-24-01, 12:55 AM
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Ya, I know I am getting the RB headers, just trying to figure out if straight pipes will give enough back pressure to open the 5th & 6th ports. Thats my question really. I almost decided to get the presilencers now just to make sure there will be enough back pressure since no one seems to know really. Thanks.
10-24-01, 08:40 PM
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Originally posted by skibum9199
Not enough back pressure with just straight pipes.... maybe with the silencers, but I kinda doubt it.
Not enough back pressure with just straight pipes.... maybe with the silencers, but I kinda doubt it.
Well the system that mazdatrix sells uses duak outlet header to dual presilencers & straight pipes to 2 mufflers & they say it opens the 5th & 6th ports. I am planning on the same system basically but half the price.