c5formula

well as most of you may know, it is crusin the coast down here in ms. my q is will running open long tubes hurt my car/motor any? i know i will lose some low end torque but i may gain some top end hp right?

thanks

1995greenTA

I think you may get a mixed opinion on this. I ran open headers lots and lots of times with my old car. It didnt hurt anything that i could tell except for some peoples ears

Injuneer

How close are the O2 sensors to the open collectors? If they can see a backwash of air from the open headers, they may screw up the A/F ratio in closed loop, causing the engine to run excessively rich.

matLT1

If you like to run an open exhaust, just install some dual cutouts. It will be alot easier than unhooking your y-pipe and it will solve the problem of false 02 readings. The ground clearance is a little close on the driver side, but you are cautious about how you take steep inclines and bumps you'll be fine.

1995greenTA

Thats what my soon to be setup (within a month or so) is going to be. Long tubes, dual e cutouts, y pipe, stock exhaust. The best of both worlds

JJJ93z

Thats what Im currently running Jet hot LTs, DMH e-cutouts bolted on the collectors (well what i ran this past summer) and it didnt work out well at all, the right bank fouled out all the plugs, which in turn fouled out my o2 sensors. Im not sure what I'm going to end up doing this summer, I may just switch to single cutout on the , it was VERY FUN while it lasted. just my $.02.

93camaroLT1

you could just ditch the O2s and run it in open loop mode and run open LT headers all the time at the cost of fuel economy, etc.. But who cares right now.. gas prices are getting cheap again!

CamaroRacing12

my plan is to do coated pacesetter longtubes....dual manual cutouts...into 3" true duals H-pipe that dump before the axle.... wat problems should i expect with the 02 sensors?

93camaroLT1

Just put the dumps a good couple feet back past the collector at the end of the headers and you should be fine, long as fresh air doesn't reach the O2's as the exhaust scavenges you should be good.

JJJ93z

So say there were leaks in an exhaust system, the o2s see fresh air more often and compensate by running richer?

Sweetred95ta

Why do you say that you'll sacrifice fuel economy running in open loop? I run an open loop tune and I'm pretty happy with my gas mileage. In open loop, unlike closed loop, you can set your own a/f.