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05-10-2008, 08:47 PM
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#1 |
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Kansas City VCA Member
 
Join Date: Jul 2006
Location: Lee Summit Mo.
Posts: 609
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High flow cats/catback, roe flash,3.55's 29HP less
Title says it all in 2007 2001 GTS was dynoed at 438.57 hp/481.79 torque,at the time car had straight exhaust ,no cats or mufflers.
2008 car was dynoed at 409.93 hp/445.67 torque Changes since 2007: 3.55 gears 3" highflow cats/catback exhaust roe sct flash An additional 3-5 thousand miles One other note plugs and wires were changed before run in 2007 have not been changed since. I won the prestigious KCVCA's runt of the litter award,and while I am honored I would prefer not to repeat
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 2001 Sapphire Coupe AKA "RUNT of the LITTER"OBJECTS IN THE REARVIEW MIRROR ARE LOSING!!!! |
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05-11-2008, 06:13 PM
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#2 |
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Enthusiast
Join Date: Apr 2008
Posts: 29
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Re: High flow cats/catback, roe flash,3.55's 29HP less
Did you use the same dyno?
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05-11-2008, 06:33 PM
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#3 |
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Kansas City VCA Member
Join Date: Jul 2006
Location: Lee Summit Mo.
Posts: 609
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Re: High flow cats/catback, roe flash,3.55's 29HP less
Same dyno and close to same weather conditions if that makes any difference.
Same operator also
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2001 Sapphire Coupe AKA "RUNT of the LITTER"OBJECTS IN THE REARVIEW MIRROR ARE LOSING!!!! |
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05-11-2008, 09:13 PM
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#4 | |
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Enthusiast
Join Date: Apr 2008
Posts: 29
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Re: High flow cats/catback, roe flash,3.55's 29HP less
Quote:
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05-11-2008, 09:17 PM
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#5 |
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Kansas City VCA Member
Join Date: Jul 2006
Location: Lee Summit Mo.
Posts: 609
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Re: High flow cats/catback, roe flash,3.55's 29HP less
Yeah I know my only concern is if there is something wrong with the car although it feels stronger than ever.The number doesnt do much for me as long as the car is running fine.
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2001 Sapphire Coupe AKA "RUNT of the LITTER"OBJECTS IN THE REARVIEW MIRROR ARE LOSING!!!! |
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05-11-2008, 09:22 PM
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#6 |
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VA/MD VCA Member
Join Date: Oct 2006
Location: Laplata, Maryland
Posts: 497
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Re: High flow cats/catback, roe flash,3.55's 29HP less
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05-14-2008, 09:55 AM
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#7 |
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VCA Member
Join Date: Nov 2003
Location: Oviedo, FL.
Posts: 80
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Re: High flow cats/catback, roe flash,3.55's 29HP less
Goldcup,
I wouldn't panic. You have made two significant changes that could be causing the discrepancy but it will feel stronger. The first was you changed gears - changing the gears will normally reduce the dyno numbers. From 3.07 to 3.55 you could naturally see 10-15hp loss but the car will feel much better and stronger because of the gears. Secondly, your initial run was with no cats or mufflers. You have added both cats and mufflers which will again restrict the flow and cut back on the dyno numbers. That in itself could cause 15-20rwhp loss top end which accounts for the remaining number loss. I believe these two factors could be your cause. Still check the plugs and make sure everything else looks good but I wouldn't panic yet. Could simply be the combination thats causing it. If you want to see what the exhaust will do then uncap the headers and make a pass and see if the 15-20hp comes back. Just my 2 cents. Good luck. God Bless, Keith
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2008 SRT10 Vert - 10.86 @ 128.29mph  , All motor
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05-17-2008, 01:55 PM
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#8 |
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VCA Member
Join Date: Aug 2006
Location: Oklahoma
Posts: 368
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Re: High flow cats/catback, roe flash,3.55's 29HP less
This wouldn't sound weird if someone posted - "I got rid of my cats and Muffler and went striaight pipe exhaust and gained 29HP"
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