IS THREE" BETTER THAN 2 1/2"
12-16-2006, 02:30 PM
#1
Thread Starter
Join Date: Dec 2006
Posts: 2
IS THREE" BETTER THAN 2 1/2"
NEED A LITTLE HELP, I'M STRUGGLING TO DECIDE BETWEEN THE MAGNAFLOW 3" CATBACK SYSTEM AND THE 2 1/2" CATBACK. I WANT TO GO WITH THE 3", BUT NO ONE HAS BEEN ABLE TO TELL ME IF IT RELIEVES TOO MUCH BACK PRESSURE (REDUCING LOWEND TQ). ANY FEEDBACK WOULD BE APPRECIATED.
12-16-2006, 04:04 PM
#4
RE: IS THREE" BETTER THAN 2 1/2"
ugh not this again, backpreasure is a myth, it is bad in any way shape or form, the butt dyno thinks you lost low end torque because you gain alot from it up top, however, you want the exhaust to flow out of the pipes at a certain velocity.
2.5 would be fine, as would 3 and it would help out a little more, if you plan on going f/I i would deff go 3"
2.5 would be fine, as would 3 and it would help out a little more, if you plan on going f/I i would deff go 3"
12-16-2006, 04:18 PM
#5
3rd Gear Member
Join Date: Sep 2006
Location:
Posts: 853
RE: IS THREE" BETTER THAN 2 1/2"
I bet you see ZERO Gains from a 3" cat Back,
Maybe if you had a LT with a 3" collector and 3" midpipe you might see a couple.
Now if you have large tube primaries and FI setup then I could see the 3" helping when making 500+ rwhp.
Maybe if you had a LT with a 3" collector and 3" midpipe you might see a couple.
Now if you have large tube primaries and FI setup then I could see the 3" helping when making 500+ rwhp.