just got to put the rear valance back on and wash the car lol
new zurst
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plumcrazee
- Posts: 128
- Joined: Mon Jan 02, 2006 10:18 am
new zurst
just had my stainles zurst mad for the 412 looks wicked and goes so much better
just got to put the rear valance back on and wash the car lol
just got to put the rear valance back on and wash the car lol
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raygreenwood
- Posts: 11907
- Joined: Wed Jan 22, 2003 12:01 am
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plumcrazee
- Posts: 128
- Joined: Mon Jan 02, 2006 10:18 am
hi ray i have had it made by turbo tomas over here in the uk
its a 6" cylinder with race exhaust internal packing so it quierter than the stock pipe untill you open it up. with 40mm twin pipes from the heat exchangers to the zurst box with 60mm twin outlets. i am keeping the stock heat exchangers for some heat in the loverly british weather lol
its a shame he droped it when fitting as the dents wount come out now
still got it cheaper lol
its a 6" cylinder with race exhaust internal packing so it quierter than the stock pipe untill you open it up. with 40mm twin pipes from the heat exchangers to the zurst box with 60mm twin outlets. i am keeping the stock heat exchangers for some heat in the loverly british weather lol
its a shame he droped it when fitting as the dents wount come out now
still got it cheaper lol
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Wally
- Posts: 4564
- Joined: Mon Oct 28, 2002 12:01 am
Than you must have dropped the rear bumper too huh?
Lovely design and looks well indeed.
I want something done about that too and am looking to have a heater box made with a little larger diameter and then bolt the 4 into 1 BAS header to it which has a larger diameter as well. That will take some time tho...
Lovely design and looks well indeed.
I want something done about that too and am looking to have a heater box made with a little larger diameter and then bolt the 4 into 1 BAS header to it which has a larger diameter as well. That will take some time tho...
T4T: 2,4ltr Type 4 Turbo engine, 10.58 1/4 mi in a streetlegal 1303
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
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plumcrazee
- Posts: 128
- Joined: Mon Jan 02, 2006 10:18 am
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raygreenwood
- Posts: 11907
- Joined: Wed Jan 22, 2003 12:01 am
Yes, its interesting ....in that the stock exhaust set-up was a marvel of pacage design. Its only real drawback was that it needed a few internal plumbing changes (easier said than done in that small of a space)...to make it less restrictive.....and short of the 1.7L...it needed more internal volume.
A prime example of just what volume changes can do with teh stock exhaust design...is in the Ernst variant of the stock muffler. It had roughly 15% greater internal volume, maybe 10mm larger center exit collector with perforations roughly 20% larger. It was a noticable change over just the OEM...in both radiated heat and back pressure.
As for plumbing changes, the stock muffler is essentially a 2 into 2. The 3/4 side is paired into the same pipe and the 1/2 side is into the same pipe.
The inequalities are this......the 3/4 cylinders are ducted to the right hand end of the main chamber (on our versions). They bleed exhaust through perforations in this pipe (on some makes)....on others they just dump into the right hand side of the main chamber....wherin they must make a 180 degree turn to start difusing into the main center exit pipe.
All this time...the 1/2 side goes all the way to the left end of the box...to make a 180 turn....but do this right at theend opening of the center exit pipe so the 1/2 cylinders have a shorter path to exit and less resistance.
If you could keep the 3/4 pipes seperate....the whole length of the chamber...so they made their 180 turn and then dumped straight into a center exit pipe...and have the 1/2 pipes do the same in the opposiute direction....you could then have equal paths....and less turbulence. This would as you see.... require a tail pipe at each end.....like the one you have. Cyls 1 and 2 exit left, 3 and 4 exit right. I would use two center pipes...stacked on top of each other. You would then need a bisector plate through teh center of the muffler. It could be done.
It would not be a power "producer"...like say a tuned header, but at least it may not be a power loss. If you had a stock style free-flowing exhaust that sounded quiet...that would not be a heat banking radiator.....and kept the heads cool....I would buy one. Ray
A prime example of just what volume changes can do with teh stock exhaust design...is in the Ernst variant of the stock muffler. It had roughly 15% greater internal volume, maybe 10mm larger center exit collector with perforations roughly 20% larger. It was a noticable change over just the OEM...in both radiated heat and back pressure.
As for plumbing changes, the stock muffler is essentially a 2 into 2. The 3/4 side is paired into the same pipe and the 1/2 side is into the same pipe.
The inequalities are this......the 3/4 cylinders are ducted to the right hand end of the main chamber (on our versions). They bleed exhaust through perforations in this pipe (on some makes)....on others they just dump into the right hand side of the main chamber....wherin they must make a 180 degree turn to start difusing into the main center exit pipe.
All this time...the 1/2 side goes all the way to the left end of the box...to make a 180 turn....but do this right at theend opening of the center exit pipe so the 1/2 cylinders have a shorter path to exit and less resistance.
If you could keep the 3/4 pipes seperate....the whole length of the chamber...so they made their 180 turn and then dumped straight into a center exit pipe...and have the 1/2 pipes do the same in the opposiute direction....you could then have equal paths....and less turbulence. This would as you see.... require a tail pipe at each end.....like the one you have. Cyls 1 and 2 exit left, 3 and 4 exit right. I would use two center pipes...stacked on top of each other. You would then need a bisector plate through teh center of the muffler. It could be done.
It would not be a power "producer"...like say a tuned header, but at least it may not be a power loss. If you had a stock style free-flowing exhaust that sounded quiet...that would not be a heat banking radiator.....and kept the heads cool....I would buy one. Ray