iceblue

Baldy specifically stated 3.8krpm





I take that back. Sorry Baldy I miss read what you stated.

89 Rag

Some of the discussion/arguement is specific to the s4 platform and should be included in the descriptions, since we are being so technical.



Certain information shared with some members need not be spelled out clear to infinity, they have the basic knowledge coupeled with common sense to get the job done...in other words, if I ask what time it is, don't tell me how to build a watch, just tell me the time, understand?

j9fd3s

[quote name='iceblue' date='Sep 25 2005, 08:19 PM' post='762781']

ColinRX7 Sure they are, go look. I have. They open. With a header and no cat. Yes.



Some systems do provide enough back pressure to the split air pipe when setup without the cat but very few.



Yeah it is, do you fully understand what he is suggesting?



I did not know it required rocket science



It is not wrong. They are capable of opening with no load, have you really tried it? I have. Numerous times. And they will do it, unless you have some kind of problem.



Then you have something wrong. Just driving your car around past even 4k means nothing to them coming on, it sully requires 1.2psi to 2.1 to fully operate weather your at 2krpm on load or 5k they will open when this psi is reached and no other times. If you rev it and get that much pressure you are defiantly building up a lot more pressure then normal. That is like saying my turbo is spooling in neutral so I must be making boost.



ive never had a problem with open exhausts and the 6 ports, ive mostly ended up with rb stuff though.



the cars vary, somtimes the actuators will move in neutral sometimes they dont, it depends on the condition of the exahust and how carboned up the sleeves are. if they open easily off idle something is wrong though, plugged exhaust.



on a stock car with a good exhaust and clean 6 ports, you really cant feel it work, the more you "feel" them come on the "sticker" they are getting.



not that i know anything, only been playing with these for 13years....

iceblue

I think it would be safe to say that one car can very from another as much as windows and Linux.



On a note for passing readers the RB presilencer is designed to open the 6PI on S4 models.

j9fd3s

how hard was it to put the bt in the miata? or how much room is there for the exhaust?

iceblue

I would continue discussion of this over pm or AIM if you wish. The car is not completed yet. My time has been pulled away lately for a 13bt GTU I have been building for someone. But the hardest part is bracing the tranny to rearend then building motor mounts ;-) Not all that bad, not bad at all.

89 Rag

Why hide it, start a new topic in other rotary powered and share, i would like to hear about it as well.

iceblue

I was simply trying to not clutter this thread off topic is all.

ColinRX7

You can't wrap everything up into a neat little package and hand it to everybody, every single car is different. You're wasting you're time making a classification for every vehicle and saying what is suppost to happen, and if not, something is wrong.



Nothing was wrong with my 6 port when I had it, just because the sleeves opened without a load on the engine. The sleeves didn't open at 3800 rpm in neutral, but they opened. Exhaust backpressure is way too unpredictable per individual application to say something is wrong with your car if they open in neutral.

teknics

I like how this guy is treating us like we just learned how to walk or something.



thank god for the ignore feature, i finally get to use it.



kevin.