Open header, good or bad idea?
#26
Nipples
Thread Starter
Join Date: Mar 2004
Location: San Jose, CA
Posts: 257
Likes: 0
Received 0 Likes
on
0 Posts
Well I did it. Running open header didn't really matter much, the car lost compression on one rotor at the event. It was great fun while it lasted though!
#27
I've run it with an open stock exhaust manifold, and it was real damn loud, but it was still livable. It wasnt quite to the ear bleeding point, but I also only redlined it once - it was all I could take. Either way, you should be ok with ear plugs.
Also, NA cars run pretty rich stock. Unless you lean it out somehow, you will have flames.
Also, NA cars run pretty rich stock. Unless you lean it out somehow, you will have flames.
#28
I rolled down a mountian
Join Date: Mar 2003
Location: garden grove, california
Posts: 548
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by theman4444
Hey man, that vid doesn't work.
http://videos.streetfire.net/Player....882F&kw=11&p=1
enjoy!
#30
Carter 2.0
I put the RB header on and just for fun I started the motor. It shook the concrete under the car!!!! Really, Really loud. I have built V8s inthe past and started them with open headers and they were not near as loud as that Rotary.
Open header will not hurt the performance of a rotary as flow is the key on this engine. better in, better out better HP. Not like you need a tuned plenum in the In side of the motor.
Open header will not hurt the performance of a rotary as flow is the key on this engine. better in, better out better HP. Not like you need a tuned plenum in the In side of the motor.
#31
Banned. I got OWNED!!!
Join Date: Nov 2002
Location: San Jose, CA
Posts: 312
Likes: 0
Received 0 Likes
on
0 Posts
the vid doesn't show how LOUD it really is............until the very end.........it's painful
but it will affect the performance when the 5th and 6th ports need to open........without the bacpressure they won't open and you will not have powah..........wait.....the presilencer IS where the tube for the 5thand 6th ports connect........so they will still open.........I can't remember
but it will affect the performance when the 5th and 6th ports need to open........without the bacpressure they won't open and you will not have powah..........wait.....the presilencer IS where the tube for the 5thand 6th ports connect........so they will still open.........I can't remember
Last edited by Madrx7racer; 09-07-05 at 12:47 PM.
#32
Carter 2.0
If he has an S5 the backpressure is created by the air pump. So if you have no split air pipe bung and just an open hole then you need to plug it up with a bolt or something in the rubber part coming from the intake area. That long stainless steel tube can be taken off and where it attaches is a rubber hose......plug that one. When the smog air pump reaches a certain rpm the 5/6 ports open form the pressure created.
#33
I rolled down a mountian
Join Date: Mar 2003
Location: garden grove, california
Posts: 548
Likes: 0
Received 0 Likes
on
0 Posts
my car is an s4, there's a tube that runs from the presilencer to the actuators. I have a block off plate and deleted my airpump.
it feels like ive lost top end when i took off the mufflers, im guessing they aid in building just enough pressure to open the aux. ports.
This past sunday I took the car like this on the 22 freeway, its painfull.
it feels like ive lost top end when i took off the mufflers, im guessing they aid in building just enough pressure to open the aux. ports.
This past sunday I took the car like this on the 22 freeway, its painfull.
#34
Carter 2.0
I am not sure about the S4 but I think you are missing something that opens the ports. I saw it explained before but bucause I have an S5 I deleted the file from my brain
#35
I rolled down a mountian
Join Date: Mar 2003
Location: garden grove, california
Posts: 548
Likes: 0
Received 0 Likes
on
0 Posts
nope, everything is there to operate the aux ports. I deleted the solenoid conrolled valves + housing and airpump. The airpump is there for emissions only on an s4.
http://www.racingbeat.com/resultset....rtNumber=16405 presilencer for s4
http://www.racingbeat.com/resultset....rtNumber=16408 presilencer for s5
edit: fixed links
http://www.racingbeat.com/resultset....rtNumber=16405 presilencer for s4
http://www.racingbeat.com/resultset....rtNumber=16408 presilencer for s5
edit: fixed links
Last edited by geargrabber; 09-07-05 at 06:37 PM.
Thread
Thread Starter
Forum
Replies
Last Post