FS:Devek Stage 2 Headers/ Borla exhaust
11-09-2012, 05:05 AM
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That's indeed good deal for complete exhaust set. I love the single tube exhaust, the note is really nice. Plizt. put some clips to youtube, once you have installed them..
Can someone kindly measure the ID of those Devek stage II primary pipes? Also interested of longest primary pipe lenght(from exhaust flange to collector).
The longest two primary pipes are just like in MSDS headers and therefore modifying MSDS to Devek stage II style isn't such a big deal. Only two pipes needs to be rerouted.
The MSDS measurements, taken by myself:
Diameter 1,65(1⅝) in.
Primary lengths from longest to shortest: 70cm, 55cm, 48cm, 50cm.
Collector length: 5.5in = 14cm.
Collector diameter: 3”
Exhaust port length from valve head to port output is 10cm
Exhaust port length + primary length = total primary length.
Total primary lengths from valve head: 80cm, 65cm, 58cm, 60cm
80cm = 31.49 in.
65cm = 25.6 in.
60cm = 23.6 in.
58cm = 22.6 in
I'll check some of my pipemax header calcultaion results for various rpms and post them, just in case someone is interested...
BTW:
The angles of Y section from conical collectors to 3,5" pipe looks to be too large. Perhaps moving Y-section little further will give better scavenging effect...
The angle between incoming Y-sections may be closer to 20 degrees. This is also the Louies recommendation for X-pipes. The flowing exhaust pulses may collapse together, loosing some energy if the angle between incoming Y-pipes is too large. Hopefully you see what I mean....
Can someone kindly measure the ID of those Devek stage II primary pipes? Also interested of longest primary pipe lenght(from exhaust flange to collector).
The longest two primary pipes are just like in MSDS headers and therefore modifying MSDS to Devek stage II style isn't such a big deal. Only two pipes needs to be rerouted.
The MSDS measurements, taken by myself:
Diameter 1,65(1⅝) in.
Primary lengths from longest to shortest: 70cm, 55cm, 48cm, 50cm.
Collector length: 5.5in = 14cm.
Collector diameter: 3”
Exhaust port length from valve head to port output is 10cm
Exhaust port length + primary length = total primary length.
Total primary lengths from valve head: 80cm, 65cm, 58cm, 60cm
80cm = 31.49 in.
65cm = 25.6 in.
60cm = 23.6 in.
58cm = 22.6 in
I'll check some of my pipemax header calcultaion results for various rpms and post them, just in case someone is interested...
BTW:
The angles of Y section from conical collectors to 3,5" pipe looks to be too large. Perhaps moving Y-section little further will give better scavenging effect...
The angle between incoming Y-sections may be closer to 20 degrees. This is also the Louies recommendation for X-pipes. The flowing exhaust pulses may collapse together, loosing some energy if the angle between incoming Y-pipes is too large. Hopefully you see what I mean....
