installed my exhaust
Originally Posted by dreamin350
Just curious as to why you wanted to remove the cats from the exhaust. Was it to get a better sound or for performance reasons. upgrading the exhaust might bump hp from 204 to 207 in that engine no?
Lead Lap
Joined: Jan 2006
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From: MA
Originally Posted by dreamin350
Just curious as to why you wanted to remove the cats from the exhaust. Was it to get a better sound or for performance reasons. upgrading the exhaust might bump hp from 204 to 207 in that engine no?
I suspect he'll get a much better bump in peak power output that 3hp. Taking those two cats out will probably net somewhere in the 10-20hp range anyway.
Your car does look very clean and I like the way the tail lights look all red. BTW.. did you just get that stuff off ebay and cover the orange on the tail lights? Also, where is everyone getting their rear spoilers?
Intermediate
Joined: Nov 2005
Posts: 421
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From: texas
Originally Posted by caymandive
Your car does look very clean and I like the way the tail lights look all red. BTW.. did you just get that stuff off ebay and cover the orange on the tail lights? Also, where is everyone getting their rear spoilers?
Originally Posted by dreamin350
Just curious as to why you wanted to remove the cats from the exhaust. Was it to get a better sound or for performance reasons. upgrading the exhaust might bump hp from 204 to 207 in that engine no?
Lead Lap
Joined: Jan 2006
Posts: 759
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From: MA
Originally Posted by shaolin
for some reason the old and new IS likes to have couple CAT... these things are design to make your car run cleaner... most avearge cars have only one and when you take it out your car will sound super loud. it will save you a lot of weight though....
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Joined: Oct 2005
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From: PA
Originally Posted by heffergm
Less cats = less restriction = more power. It'll also be louder.
I suspect he'll get a much better bump in peak power output that 3hp. Taking those two cats out will probably net somewhere in the 10-20hp range anyway.
I suspect he'll get a much better bump in peak power output that 3hp. Taking those two cats out will probably net somewhere in the 10-20hp range anyway.
I removed all the cats in my old wrx. The benefits of that in a turbocharged car are much greater than non-turbo engines. I was able to get more hp (maybe 12-15, but not more than that) and quicker spooling. I still don't see the performance benefits of doing that mod, or wanting to get more noise from a car (and company) designed to be exceptionally quiet. I do have to admit the end result does look sweet though!
Lead Lap
Joined: Jan 2006
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From: MA
Originally Posted by dreamin350
I removed all the cats in my old wrx. The benefits of that in a turbocharged car are much greater than non-turbo engines. I was able to get more hp (maybe 12-15, but not more than that) and quicker spooling. I still don't see the performance benefits of doing that mod, or wanting to get more noise from a car (and company) designed to be exceptionally quiet. I do have to admit the end result does look sweet though!
Originally Posted by heffergm
You could have made a whole lot more than 10-20hp with some engine management to take advantage of that exhaust. With no cats, you're looking at around 280 crank HP with EM... a 60hp bump or so. In fact, running a turbo'd car with no cats and no EM tends to lead to blown motors due to boost spiking.
Originally Posted by ihkskim
yea some stupid *** decided to give me some of his paint and not tell me. imma remove it tonight. i removed 2 of the 4 cats that are on the car
Driver
Joined: Mar 2002
Posts: 101
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From: Alabama
I have the before and after dyno graphs done on my 350 that show that I gained almost 5 hp at the wheels from removing the second set of cats, the resonator, and those huge mufflers at the end. I put in straight pipes from where they cut everything out and weighed everything as they removed it from the car and what they put back on the car. It actually gained 8 lbs putting the two straight pipes and Magnaflow mufflers on. But i'll take an 8 lb weight gain for almost 5 more hp at the wheels anyday.
Here is a quick pic of everything that was removed:
and what it looks like now under there:
Here is a quick pic of everything that was removed:
and what it looks like now under there:
Lead Lap
Joined: Jan 2006
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From: MA
Originally Posted by Idrewfelix
Boostspike is in the quality of the boostcontroller and wastegate. That is, if they're aftermarket.