What's the real story on headers
02-13-2015, 01:20 PM
#31
PJ's and My headers will soon be available for purchase. 321SS, a header designed to take advantage of the exhaust pulses through both a stepped and long tube setup, and sizes that match the engine's flow. Charles and I partnered up and have just been waiting on the bends to finish and to decide on a muffler design.
We've decided on the design PJ has on his 997.
I'll update when we have the first sets available with a group buy.
We've decided on the design PJ has on his 997.
I'll update when we have the first sets available with a group buy.
full custom set up from someone that knows what they are doing and you get power - catless, side muffler delete, and decent weight loss (IIRC from 70 lbs to 28)... just what's pictured below bolted on was 25+ hp without tune... since then the car has morphed into quite a bit more... but I had a similar experience on my previous 996 gt3 by just changing headers back.
is it all worth it?
I think so... car has noticeable power gains and sounds great
If I was forced to run CATs I am not sure I would do anything but a bypass pipe or the side delete... Cats seem to the be culprit in most of the exhaust disappointment scenarios -- failed cats, cats throwing check engine, costly etc....
is it all worth it?
I think so... car has noticeable power gains and sounds great
If I was forced to run CATs I am not sure I would do anything but a bypass pipe or the side delete... Cats seem to the be culprit in most of the exhaust disappointment scenarios -- failed cats, cats throwing check engine, costly etc....
02-13-2015, 10:18 PM
#33
Three Wheelin'
Join Date: Jul 2006
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PJ's and My headers will soon be available for purchase. 321SS, a header designed to take advantage of the exhaust pulses through both a stepped and long tube setup, and sizes that match the engine's flow. Charles and I partnered up and have just been waiting on the bends to finish and to decide on a muffler design.
We've decided on the design PJ has on his 997.
I'll update when we have the first sets available with a group buy.
We've decided on the design PJ has on his 997.
I'll update when we have the first sets available with a group buy.
02-13-2015, 11:04 PM
#34
Three Wheelin'
02-13-2015, 11:26 PM
#35
Instructor
Join Date: Jan 2008
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On my 3.2 I have the Cargraphic Powerkit 6 CARP97GT3KIT638 (Equal length headers, center muffler w/ special Ø 70mm exhaust flaps retaining use of original Sport switch, side mufflers delete, OBD2 compliant - Ø 130mm, 200 cell tri-metal cats with special coating) + DME control unit program (MOTP97GT3EXHKIT338) + BMC Filter.
Cargraphic swears by a 31PS/6Nm increase; My seat-of-the-pants feeling says there's actually a dip in torque at around 3.500rpm; other than that, there's definitely a marked, strong power difference all the way up the rev band compared to stock. Flaps closed, sound is deeper than stock but still acceptable for cruising. Flaps open turn the whole thing into a crisp, intoxicating, other-worldly, symphonic experience that keeps me coming back for more. 18 months and 10k Km's driven with this setup and I'm looking fwd to the next 10 years and 90k Km's.
Cargraphic swears by a 31PS/6Nm increase; My seat-of-the-pants feeling says there's actually a dip in torque at around 3.500rpm; other than that, there's definitely a marked, strong power difference all the way up the rev band compared to stock. Flaps closed, sound is deeper than stock but still acceptable for cruising. Flaps open turn the whole thing into a crisp, intoxicating, other-worldly, symphonic experience that keeps me coming back for more. 18 months and 10k Km's driven with this setup and I'm looking fwd to the next 10 years and 90k Km's.
Last edited by sixtosune; 02-14-2015 at 01:00 AM.
02-15-2015, 01:47 AM
#36
AWE tested extensively before they settled on a design with headers, cats, no side mufflers, no center piece, separate cans a la Cup car. Much
Much lighter and better perf across the board. Check if they're still making it.
Much lighter and better perf across the board. Check if they're still making it.