Results from Cat Shootout!
TECH Enthusiast
Joined: Aug 2002
Posts: 715
Likes: 8
From: Houston
Re: Results from Cat Shootout! Interesting to compare to installuniversity's findings:
Passenger Side Catalytic Converter
2.5 inlet id
2.5 outlet id
350.9 cfm @ 28"
Driver's Side Catalytic Converter
2.5 inlet id
2.5 outlet id
314.4 cfm @ 28"
TTS Bullet Catalytic Converter
2.5 inlet id
2.5 outlet id
324.6 cfm @ 28"
Carsound Catalytic Converter
2.5 inlet id
2.5 outlet id
436.7 cfm @ 28"
FLP Catalytic Converter
2.5 inlet id
2.5 outlet id
440.5 cfm @ 28"
It's interesting that the carsounds flowed similar numbers but the stock manifolds were significantly different. Installuniversity modified the stock cats by enlarging the opening/exit to 2.5".
Installuni suggests that the stock cats are only good to 258.1hp (flywheel), while the carsound cats are good to 363fwhp (by Barry's numbers) and 397fwhp (by installuni's numbers).
Russ
Passenger Side Catalytic Converter
2.5 inlet id
2.5 outlet id
350.9 cfm @ 28"
Driver's Side Catalytic Converter
2.5 inlet id
2.5 outlet id
314.4 cfm @ 28"
TTS Bullet Catalytic Converter
2.5 inlet id
2.5 outlet id
324.6 cfm @ 28"
Carsound Catalytic Converter
2.5 inlet id
2.5 outlet id
436.7 cfm @ 28"
FLP Catalytic Converter
2.5 inlet id
2.5 outlet id
440.5 cfm @ 28"
It's interesting that the carsounds flowed similar numbers but the stock manifolds were significantly different. Installuniversity modified the stock cats by enlarging the opening/exit to 2.5".
Installuni suggests that the stock cats are only good to 258.1hp (flywheel), while the carsound cats are good to 363fwhp (by Barry's numbers) and 397fwhp (by installuni's numbers).
Russ
Re: Results from Cat Shootout! I think that making a set of downtubes
with the Random bullet cats, that bolted
into place on standard cars replacing the
stock units, would maybe be a decent
little seller in the California market
(if you can really get 15-20HP out of the
pair, and let people stay smog legal,
that's an angle). Get that together with
a pair of port-matched late model exhaust
manifolds, this looks to me like the gains
people get from the whole long-tube install
without the hassles (mechanical and legal).
with the Random bullet cats, that bolted
into place on standard cars replacing the
stock units, would maybe be a decent
little seller in the California market
(if you can really get 15-20HP out of the
pair, and let people stay smog legal,
that's an angle). Get that together with
a pair of port-matched late model exhaust
manifolds, this looks to me like the gains
people get from the whole long-tube install
without the hassles (mechanical and legal).
Re: Results from Cat Shootout! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by jimmyblue:
<strong> I think that making a set of downtubes
with the Random bullet cats, that bolted
into place on standard cars replacing the
stock units, would maybe be a decent
little seller in the California market
(if you can really get 15-20HP out of the
pair, and let people stay smog legal,
that's an angle). Get that together with
a pair of port-matched late model exhaust
manifolds, this looks to me like the gains
people get from the whole long-tube install
without the hassles (mechanical and legal). </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You'll never get a 15-20 hp gain with high flow cats over stock cats on a car w/ stock exhaust manifolds, especially since an ORY doesnt even add that much power. Also, you'll never get the gains or even similar gains to longtubes/mid lenghts without actually having them. Longtubes dont just flow well, they actually "pull" fresh air into the cylinder...one thing a manifold can never do.
Brad
<strong> I think that making a set of downtubes
with the Random bullet cats, that bolted
into place on standard cars replacing the
stock units, would maybe be a decent
little seller in the California market
(if you can really get 15-20HP out of the
pair, and let people stay smog legal,
that's an angle). Get that together with
a pair of port-matched late model exhaust
manifolds, this looks to me like the gains
people get from the whole long-tube install
without the hassles (mechanical and legal). </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You'll never get a 15-20 hp gain with high flow cats over stock cats on a car w/ stock exhaust manifolds, especially since an ORY doesnt even add that much power. Also, you'll never get the gains or even similar gains to longtubes/mid lenghts without actually having them. Longtubes dont just flow well, they actually "pull" fresh air into the cylinder...one thing a manifold can never do.
Brad
Re: Results from Cat Shootout! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> It was amazing to see how nicely the carsounds flowed. Shocked to see the 813000 Random flow so little.
The metallic Randoms flowed great but for 3-4 times the price of the car sound its not worth it. And the Carsound is less than half the price of the regular Randoms and out flowed it by over 20% </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have those installed with my true duals <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> Glad to know that is money well spent.
Lynda
The metallic Randoms flowed great but for 3-4 times the price of the car sound its not worth it. And the Carsound is less than half the price of the regular Randoms and out flowed it by over 20% </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have those installed with my true duals <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> Glad to know that is money well spent.
Lynda
