Header Brainstorming
10-01-2006, 04:19 PM
#1
The Professor
Thread Starter
Header Brainstorming
Just thinking out lond, but why hasn't anyone tried a velocity stack header?
I'm thinking that if you could get the diameter of the tubes just right you could increase the rate of exhaust flow while at low RPMs, and while up very high the system would be able to flow enough without restriction.
I'm thinking you could make the farthest port lead out with a very large diameter pipe, and then have the middle joined port lead into this large pipe in the center. The pipes would be sized that when the middle port pipe joins into the farthest port pipe the usable area will be slightly larger than stock.
Below are two quick designs, The first seems to be the most cost effective and will still produce gains.
While the second appears to be grossly more efficient but very compex to manufacture because the middle is split and incorperated into the two different ports. I'm thinking that a 3 + 1/2" exhaust, a supercharger and some exhaust porting would accompany the later very well.
I'm thinking that if you could get the diameter of the tubes just right you could increase the rate of exhaust flow while at low RPMs, and while up very high the system would be able to flow enough without restriction.
I'm thinking you could make the farthest port lead out with a very large diameter pipe, and then have the middle joined port lead into this large pipe in the center. The pipes would be sized that when the middle port pipe joins into the farthest port pipe the usable area will be slightly larger than stock.
Below are two quick designs, The first seems to be the most cost effective and will still produce gains.
While the second appears to be grossly more efficient but very compex to manufacture because the middle is split and incorperated into the two different ports. I'm thinking that a 3 + 1/2" exhaust, a supercharger and some exhaust porting would accompany the later very well.
10-01-2006, 10:16 PM
#2
To be able to design a proper header we should know how much exhaust flows out of each port. The front and rear ports flow the same but I dont think the siamesed middle port flows double (as it would be if the port sizes were the same).
Anybody knows?
Anybody knows?
10-02-2006, 04:58 PM
#3
Lasse wankel
Join Date: Aug 2006
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I will be dyno testing my prototype header for RX-8 in about a week. It has really short primaries and small collector id and of course tapered 7 degree flange. Hope to acheive a solid +10 hp.
/Lasse
/Lasse
10-02-2006, 05:10 PM
#4
The Professor
Thread Starter
Originally Posted by Lasse wankel
I will be dyno testing my prototype header for RX-8 in about a week. It has really short primaries and small collector id and of course tapered 7 degree flange. Hope to acheive a solid +10 hp.
/Lasse
/Lasse
10-02-2006, 06:59 PM
#6
Bummed, but bring on OU!
If you haven't seen this, it's a good read. Better sit down for it though, it's one of Rotarygod's longest 
.
https://www.rx8club.com/series-i-tech-garage-22/another-one-my-insanely-long-exhaust-tech-articles-73332/
There were a couple header threads a while back. The info may be out of date now, but they might be worth looking up. (search for posts by Rotarygod in a header thread, he posted in both).
.https://www.rx8club.com/series-i-tech-garage-22/another-one-my-insanely-long-exhaust-tech-articles-73332/
There were a couple header threads a while back. The info may be out of date now, but they might be worth looking up. (search for posts by Rotarygod in a header thread, he posted in both).
10-02-2006, 09:40 PM
#7
https://www.rx8club.com/showpost.php...0&postcount=96
there is no overlap on the Renesis intake/exhaust port timing, common header rules don't necessarily apply
there is no overlap on the Renesis intake/exhaust port timing, common header rules don't necessarily apply
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