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996/GT3 exhaust?? CATS?

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  #1  
Old 02-09-2010, 08:35 AM
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996/GT3 exhaust?? CATS?

Can anyone tell me if you LOSE power by removing the cats and using straight pipes on a 6/GT3?

Any dyno sheets to demonstrate this?

thanks
 
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Old 02-09-2010, 09:49 AM
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I removed the cats on mine but I had a full custom exhaust with headers... gained 20 whp

the stock exhaust is heavy, restrictive, and does not sound that exciting...
 
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Old 02-09-2010, 09:52 AM
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Originally Posted by PJS
I removed the cats on mine but I had a full custom exhaust with headers... gained 20 whp

the stock exhaust is heavy, restrictive, and does not sound that exciting...
20hp? Impressive.
Who made the exhaust?
Any loss in TQ ?
 
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Old 02-09-2010, 10:06 AM
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check this mods :-) (I am learning)

I cannot post an embedded link as they are not a board sponsor but if you wanted to google advanced street performance in Kent, WA and talk to a guy named Charles he might know something about it

the hp gains are with no software
and you can get another 5 or so with a filter/air box mod

not TQ loss
 
  #5  
Old 02-09-2010, 11:19 AM
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Originally Posted by PJS
check this mods :-) (I am learning)



the hp gains are with no software
and you can get another 5 or so with a filter/air box mod

not TQ loss
What is the airbox mod?

thanks
 
  #6  
Old 02-09-2010, 11:25 AM
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Originally Posted by PJS
check this mods :-) (I am learning)

I cannot post an embedded link as they are not a board sponsor but if you wanted to google advanced street performance in Kent, WA and talk to a guy named Charles he might know something about it

the hp gains are with no software
and you can get another 5 or so with a filter/air box mod

not TQ loss

Any sound clips/youtube?
 
  #7  
Old 02-09-2010, 11:33 AM
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  #8  
Old 02-09-2010, 11:34 AM
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NICE!!
Thanks!!
 
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Old 02-09-2010, 11:35 AM
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Originally Posted by stacygrk
What is the airbox mod?

thanks
call charles at ASP... he can explain
or you can add the K&N 997 GT3 RS intake system pretty easily...
 
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Old 02-09-2010, 11:38 AM
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What other mods were done?
 
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Old 02-09-2010, 11:41 AM
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3 sets of wheels in addition to stock
RS wing
CF side mirror housings
RS rear bumper (for center exit exhaust)
Exhaust and headers (no cats)
Porsche MS Ring and Pinion (cheap way to lower gearing)
Escort SRX
CF ebrake handle
CF shift ****
996 Cup steering wheel with QR
Recaro seats
Harnesses
Half cage
KW V3 susp
Porsche MS toe links
TRG control arms, drop links, eccentric adjuster, and monoballs
Porsche cup rear tow hook
Rennline front tow hook
Custom rear crash bar (under the bumper since I had to remove a 5mph shock to mount the rear tow hook)
Air box modded
KN filter
Cup shift cables
Brembo 2 piece slotted replacement rotors front and rear with pagid RS29s (yellows)
Stainless brake lines
Headlight film
Caragraphic front grill screens
Cup splitter
LWFW and clutch
Full rennline kit for drivers side (pedals, race mat, floor board etc)

Car is sold and on its way to a new owner in Georgia
 
  #12  
Old 02-09-2010, 11:49 AM
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Originally Posted by PJS
3 sets of wheels in addition to stock
RS wing
CF side mirror housings
RS rear bumper (for center exit exhaust)
Exhaust and headers (no cats)
Porsche MS Ring and Pinion (cheap way to lower gearing)
Escort SRX
CF ebrake handle
CF shift ****
996 Cup steering wheel with QR
Recaro seats
Harnesses
Half cage
KW V3 susp
Porsche MS toe links
TRG control arms, drop links, eccentric adjuster, and monoballs
Porsche cup rear tow hook
Rennline front tow hook
Custom rear crash bar (under the bumper since I had to remove a 5mph shock to mount the rear tow hook)
Air box modded
KN filter
Cup shift cables
Brembo 2 piece slotted replacement rotors front and rear with pagid RS29s (yellows)
Stainless brake lines
Headlight film
Caragraphic front grill screens
Cup splitter
LWFW and clutch
Full rennline kit for drivers side (pedals, race mat, floor board etc)

Car is sold and on its way to a new owner in Georgia
Very nice mods.

Any other mods to the MOTOR aside from the headers/exhaust/intake?
Any tune to it?
 
  #13  
Old 02-09-2010, 11:50 AM
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nope
exhaust, headers, ring and pinion
 
  #14  
Old 02-09-2010, 11:52 AM
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Originally Posted by PJS
nope
exhaust, headers, ring and pinion
What were the final dyno numbers?
 
  #15  
Old 02-09-2010, 11:55 AM
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stock 355 to the wheels sae corrected on a dynojet
when were done 380 to the wheels saw corrected on a dynojet
no tune
no software
no flash
stock exhaust was about 100 lbs and custom exhaust was about 30 lbs
 


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