545i Extractor manifolds
#11
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My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
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Originally Posted by NPe' post='687590' date='Oct 7 2008, 09:29 PM
..... to gain any substantial effect, metal cats must be fitted.
And for me that would be the only purpose doing this![Happy](https://5series.net/forums/images/smilies/imported/happy.gif)
And for me that would be the only purpose doing this
![Happy](https://5series.net/forums/images/smilies/imported/happy.gif)
1. Would the rest of the exhaust (after cats) be as is ?
2. Do the met cats affect lambda sensor readings - before and after ? (my ECU is already chiptuned)
3. Will met cats affect my yearly exhaust emission inspections ?
#12
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Originally Posted by andy545' post='687961' date='Oct 8 2008, 10:01 AM
point taken. 3 q's:
1. Would the rest of the exhaust (after cats) be as is ?
1. Would the rest of the exhaust (after cats) be as is ?
2. Do the met cats affect lambda sensor readings - before and after ? (my ECU is already chiptuned)
But the major problem of removing kat is that you'd lose backpressure and your car would go A LOT from 4000 to 7000 rpm but dead under 4k. Exactly as happened on my Mini some days ago.
3. Will met cats affect my yearly exhaust emission inspections ?
#13
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Are you going to go ahead with this project, NPe ?
For you at least.
Before spending 2k on manifolds, why don't you try to replace cats with 200 cell ones ?
I'm really tempting!
New manifolds would give a better power (than stock) on all revs, but they are pretty expensive comparing to cats, that are cheaper and more power gaining.
For you at least.
Before spending 2k on manifolds, why don't you try to replace cats with 200 cell ones ?
I'm really tempting!
New manifolds would give a better power (than stock) on all revs, but they are pretty expensive comparing to cats, that are cheaper and more power gaining.
#14
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My Ride: M6 E63 Sapphire black
Z3 Coupe R4Turbo Hellrot, semi race. (670bhp)
Z3 Coupe V8Turbo design work ongoing, full race.
Sold: 545i Titanium Silver
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Originally Posted by AlexFW' post='690419' date='Oct 11 2008, 09:25 AM
Are you going to go ahead with this project, NPe ?
For you at least.
Before spending 2k on manifolds, why don't you try to replace cats with 200 cell ones ?
I'm really tempting!
New manifolds would give a better power (than stock) on all revs, but they are pretty expensive comparing to cats, that are cheaper and more power gaining.
For you at least.
Before spending 2k on manifolds, why don't you try to replace cats with 200 cell ones ?
I'm really tempting!
New manifolds would give a better power (than stock) on all revs, but they are pretty expensive comparing to cats, that are cheaper and more power gaining.
And cats will be replaced at the same time.
I write when design is done.
And hopefully be able to answer questions regard to the upgrade.
If there is any point start producing them? Only time will tell
![Big Grin](https://5series.net/forums/images/smilies/imported/biggrin.gif)
#15
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Originally Posted by NPe' post='690426' date='Oct 11 2008, 10:28 AM
Yes, I will go forward doing one set for evaluation and reference. (Flanges will be water-jet cut this weekend)
And cats will be replaced at the same time.
I write when design is done.
And cats will be replaced at the same time.
I write when design is done.
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
And hopefully be able to answer questions regard to the upgrade.
If there is any point start producing them? Only time will tell
If there is any point start producing them? Only time will tell
![Big Grin](https://5series.net/forums/images/smilies/imported/biggrin.gif)
#16
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My Ride: M6 E63 Sapphire black
Z3 Coupe R4Turbo Hellrot, semi race. (670bhp)
Z3 Coupe V8Turbo design work ongoing, full race.
Sold: 545i Titanium Silver
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