View Poll Results: cutout open or closed
cutout open
57
89.06%
cutout closed
7
10.94%
Voters: 64. You may not vote on this poll
Cutout!!!
Originally Posted by DMONEY06
I had my cutout open and was alot louder with a little bit of a loss in hp, when its closed it seems like it has more power why is this what kind of opinons do u guys have???
Thats odd, I got about a .25 of a second gain with the cut out open.. Do you have a cam in your car ? If you do and if the cam is too big then yes I can understand that happening.
12 Second Club
Joined: Apr 2005
Posts: 112
Likes: 0
Originally Posted by orangeapeel
They only come with a cap for inspection day. 
What effect does cutouts right where the cats should be have on the 02s? Mine seemed to have less power with them open. Where are you guys mounting yours. Could it just be that it is soooo loud that it should seem faster?
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If you loose HP or torque with an open cutout there are only possible reasons:
1) You need to fix your tune. (90+% of the issues)
2) your cut-out placement/installation is FUBAR. A cut-out should not reduce exhaust gas velocity when properly installed unless install it so far upstream that it messes up your header collectors. Some dual cut-out Y-pipes can effect torque by being too close to the collector.
1) You need to fix your tune. (90+% of the issues)
2) your cut-out placement/installation is FUBAR. A cut-out should not reduce exhaust gas velocity when properly installed unless install it so far upstream that it messes up your header collectors. Some dual cut-out Y-pipes can effect torque by being too close to the collector.
My 570 Rwhp SS gained 1 rwhp and lost 4 rwtq with the 3" cut out wide open Vs. the closed cut out and Hooker cat back.
I was making enough exhaust pressure on the dyno during tuning that I was plugging the air/fuel probe with muffler packing material on every pull. That was with the SLP dual/dual set up. I ended up buying the Hooker just so we could finish tuning and was very pleased.
A lot of you in this thread have zero real world numbers/results to post, only guestimates. A lot of you also claim that all cars will make more power with a cut out, I guess bigger is allway better?
I was making enough exhaust pressure on the dyno during tuning that I was plugging the air/fuel probe with muffler packing material on every pull. That was with the SLP dual/dual set up. I ended up buying the Hooker just so we could finish tuning and was very pleased.
A lot of you in this thread have zero real world numbers/results to post, only guestimates. A lot of you also claim that all cars will make more power with a cut out, I guess bigger is allway better?
My 570 Rwhp SS gained 1 rwhp and lost 4 rwtq with the 3" cut out wide open Vs. the closed cut out and Hooker cat back.
I was making enough exhaust pressure on the dyno during tuning that I was plugging the air/fuel probe with muffler packing material on every pull. That was with the SLP dual/dual set up. I ended up buying the Hooker just so we could finish tuning and was very pleased.
A lot of you in this thread have zero real world numbers/results to post, only guestimates. A lot of you also claim that all cars will make more power with a cut out, I guess bigger is allway better?
I was making enough exhaust pressure on the dyno during tuning that I was plugging the air/fuel probe with muffler packing material on every pull. That was with the SLP dual/dual set up. I ended up buying the Hooker just so we could finish tuning and was very pleased.
A lot of you in this thread have zero real world numbers/results to post, only guestimates. A lot of you also claim that all cars will make more power with a cut out, I guess bigger is allway better?
