Catalytic Bypass Advantage???
10-28-2001, 04:28 AM
#1
Registered User
Thread Starter
Join Date: Oct 2001
Location: Southern
Posts: 47
Likes: 0
Received 0 Likes
on
0 Posts
Catalytic Bypass Advantage???
Is there any advantage to adding a Catalytic Bypass? I have heard that it improves flow and adds HP but in some cases the difference in nominal and not worth the mod.
10-28-2001, 05:08 AM
#2
Registered User
Join Date: Oct 2000
Location: Port Washington
Posts: 968
Likes: 0
Received 0 Likes
on
0 Posts
My supercharged F20B didn't benefit at all from the BYS straightpipe cat replacement... I have similar HP numbers to those who have "stock + SC" cars. Plus, my exhaust pipes are stained with black soot...
Our stock catalyst is probably a very high flow unit, so I would keep it and do the environment good
Our stock catalyst is probably a very high flow unit, so I would keep it and do the environment good
10-28-2001, 07:18 AM
#3
Registered User
Join Date: Aug 2001
Location: CHARLESTON
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
no advantage on n/a cars
i dynoed mine with and without cat with onl;y enough down time btwn dynos tyo swap parts 10-15 min
with the test pipe i gaine 1-2 horse everywhere in v-tec lost 1-2 everywhere not in v-tec
lost 3-8 torque EVERYWHERE - i was told this is due to no back pressure
btw this was done with spoon headerr and exhaust and injen cai
i dynoed mine with and without cat with onl;y enough down time btwn dynos tyo swap parts 10-15 min
with the test pipe i gaine 1-2 horse everywhere in v-tec lost 1-2 everywhere not in v-tec
lost 3-8 torque EVERYWHERE - i was told this is due to no back pressure
btw this was done with spoon headerr and exhaust and injen cai
10-28-2001, 03:38 PM
#6
Registered User
Join Date: Aug 2001
Location: Grants Pass
Posts: 63
Likes: 0
Received 0 Likes
on
0 Posts
uhear, that use to be a great mod on alot of cars but now adays it doesn't pay, especially in Cal. you could get a $10k fine for it. Most cars built anymore loose HP then gain and the little you get any more doesn't do anything that you could notice.
10-28-2001, 03:48 PM
#7
Registered User
Join Date: Oct 2000
Location: Port Washington
Posts: 968
Likes: 0
Received 0 Likes
on
0 Posts
When I bring my car out of storage next spring, I will put my catalyst back on... and get the car dyno-ed to see if there are any changes.
In addition to the harm I am doing to the environment + the nasty exhaust smell, I will not miss the black soot stain on my exhaust tips...
In addition to the harm I am doing to the environment + the nasty exhaust smell, I will not miss the black soot stain on my exhaust tips...
Thread
Thread Starter
Forum
Replies
Last Post