Headers & downpipes - Real gains ?
02-24-2006, 04:03 AM
#1
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Headers & downpipes - Real gains ?
So what is the concensus here - do they add power or do they drop the backpressure affecting boost pressure ?
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
02-25-2006, 11:23 AM
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Originally Posted by stevebez
So what is the concensus here - do they add power or do they drop the backpressure affecting boost pressure ?
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
Recently on a MAHA Dyno, my car got 494rwhp. I have the full Supersprint header and exhaust set up. I also have the Carlsson pulley and ECU kit.
07-31-2006, 09:22 AM
#5
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494 is a good numbers...but I dont beleive it cause of SS exhausts...Carlsson pullies are bigger diameter ones...If Kleemann if with thier pullier makes 520 HP, Carlsson set up makes 560 HP...Therefore 494 is due to bigger diameter pullies...not full SS exhaust system...
07-31-2006, 09:42 AM
#7
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Originally Posted by Jspeed
Definitely a noticeable difference. And no loss is power anywhere.
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07-31-2006, 09:50 AM
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E63 biturbo
I don't know what he did, but I can find out though. Here's the cat, not sure if there's another one closer to the headers.
Last edited by Jspeed; 07-31-2006 at 09:59 AM.
07-31-2006, 09:57 AM
#9
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Please find this A.S.A.P if possible today, cause I am planing all installations tommorow...
Looking from underneath the car, it there any wires and sensors behind Secondary Cats ???
Looking from underneath the car, it there any wires and sensors behind Secondary Cats ???
07-31-2006, 10:33 AM
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2003 E55 AMG
They do both!
I jumped 31rwhp and 30rwtq with the Evosport headers. Went from 411rwhp stock to 442rwhp.
They also drop your boost pressure because they remove the restriction that the stock manifolds create.
With Evosport headers you will loose 1 - 2lbs boost. With Kleemann you will loose 2 - 3lbs boost. But, you will make more power with the lower boost which means your car will be running ALOT more efficiently... Less heat, more power!
That's why I aways said from the beginning, leave the pullies alone and just make the car more efficient first.. Headers, cooling, brakes.. Then lastly do the ECU & pullies.
I jumped 31rwhp and 30rwtq with the Evosport headers. Went from 411rwhp stock to 442rwhp.
They also drop your boost pressure because they remove the restriction that the stock manifolds create.
With Evosport headers you will loose 1 - 2lbs boost. With Kleemann you will loose 2 - 3lbs boost. But, you will make more power with the lower boost which means your car will be running ALOT more efficiently... Less heat, more power!
That's why I aways said from the beginning, leave the pullies alone and just make the car more efficient first.. Headers, cooling, brakes.. Then lastly do the ECU & pullies.
Originally Posted by stevebez
So what is the concensus here - do they add power or do they drop the backpressure affecting boost pressure ?
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
Some reports that they actually result in lower power ....
How about headers & downpipes with remap?
Rgds Steve.
07-31-2006, 10:48 AM
#13
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Вut how would Headers affect A/F ratios...ECU better be adjuыted as well...
Vics you say if they are bolt in, it should just use them as they were designed to be used ???
They also said they installed those header without Primary CATS and thier client didnt see a SES light after, but he had those CAts removed before...
Vics you say if they are bolt in, it should just use them as they were designed to be used ???
They also said they installed those header without Primary CATS and thier client didnt see a SES light after, but he had those CAts removed before...
Last edited by E55 RUSS; 07-31-2006 at 01:50 PM.
07-31-2006, 10:59 AM
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2004 E55
Headers and downpipe will add more power. With the new exhaust components your cylinders will scavenge out the exhaust better and in turn allow a cleaner charge to come into the cylinder ie. more power!
Turbo cars and blower cars benefit best with better exhaust systems, eg. more exhaust duration on the cam shaft, better designed exhaust systems, less restrictions.
M5 Rus, the headers should really affect your air/fuel ratio, all the headers should do is help scavenge your cylinders better. In regards to the whole check engine light concern. Many people get the ecu upgrade as well because certain tuners will remove the prim cats and will use there star diagnosis to turn off the secondary O2 censor thus not causing the check engine light. Hope that helps!
Turbo cars and blower cars benefit best with better exhaust systems, eg. more exhaust duration on the cam shaft, better designed exhaust systems, less restrictions.
M5 Rus, the headers should really affect your air/fuel ratio, all the headers should do is help scavenge your cylinders better. In regards to the whole check engine light concern. Many people get the ecu upgrade as well because certain tuners will remove the prim cats and will use there star diagnosis to turn off the secondary O2 censor thus not causing the check engine light. Hope that helps!
07-31-2006, 01:54 PM
#15
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Thanks...you info is really helpful...but if we turn Check engine lights via STAR, if some thing goes wrong witht he engine I wont know, cause there wouldnt be any check engine lights...or you say Star can jsut turn secodary
O2 sensors OFF ???
O2 sensors OFF ???
07-31-2006, 04:49 PM
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12' C63 P31, 06' Supercharged Range, 08' BMW 550i
Originally Posted by M5 RUS
494 is a good numbers...but I dont beleive it cause of SS exhausts...Carlsson pullies are bigger diameter ones...If Kleemann if with thier pullier makes 520 HP, Carlsson set up makes 560 HP...Therefore 494 is due to bigger diameter pullies...not full SS exhaust system...
07-31-2006, 05:36 PM
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2004 E55
Hey M5 Rus, using the star diagnosis does not disable your check engine light, all your doing is disabling your secondary O2 sensors with star, all your other sensors will still be functional, so your check engine light will still work fine.
07-31-2006, 11:17 PM
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2015 S212
Originally Posted by Bone Stock
Hey M5 Rus, using the star diagnosis does not disable your check engine light, all your doing is disabling your secondary O2 sensors with star, all your other sensors will still be functional, so your check engine light will still work fine.
