true dual for obd1 can it be done

[94 cheyenne]

okay yall im stumped on this my brother bought a nice 92 1500 4x4 the other day all it has for an exhaust is a set of short tubes he wants a true dual exhaust i dont see it working were would you run the o2 i think the best route would be to run pipe to an x and then dual from there with the o2 in the x if i can talk him into this would it work it does have to pass emissions testing ill be the one putting the exhaust on more then likely what do yall think could work the engines a 350 thats bone stock he insists on wanting a true dual i dont see how it can be done thanks for any help

 

[bluex]

Tbi only has one O2 sensor in the passenger manifold anyway so yes you can do it, no need for an x...

 

[SCOTTYINWV]

The only o2 should be in the drivers side header collector. Get a set of fitting collectors, run the drivers side pipe under the trans just behind the starter, the pass side strait back. Run either a dual in dual out cat there they meet or stagger 2 seperste cats. Run a few feet of pipe and dual mufflers sideways, side by side near the rear of the cab. Run 2 tailpipes diagonal to the rear axle and split them out in whatever direction you want after the axle.

 

[94 cheyenne]

thanks guys i reckon he wants to run 2 seperate cats with straight pipe after that im not sure why he wants true dual my 94 has good power with a manderal bent y pipe to one cat and a dual cb extreme muffler thanks again guys

 

[SCOTTYINWV]

thanks guys i reckon he wants to run 2 seperate cats with straight pipe after that im not sure why he wants true dual my 94 has good power with a manderal bent y pipe to one cat and a dual cb extreme muffler thanks again guys

Post up a video of yours sometime.

 

[94 cheyenne]

will do

 

[someotherguy]

Later year TBI's with heated O2 (most 94-95 automatics) have the O2 just ahead of the converter, after the Y-pipe joins both sides.

Going dual with an X (or H) and putting the O2 where it gets combined flow from both sides isn't a bad idea IMO since it's essentially the direction the factory went with the 2-into-1 exhaust, but you'll need to convert that 92 to a heated (3-wire) O2. Very easy. Power from a "key in run" source (can be found in the convenience center under the dash, terminals marked "WHT") and ground, signal wire, buy an O2 for a 94 with automatic, weld O2 bung into X or H pipe, done.

Richard

 

[94 cheyenne]

yeah i did the exhaust on the truck we left the 02 in the manifold so far he isnt having any issues but i would still like to run an x

 

[mightyrat]

yeah i did the exhaust on the truck we left the 02 in the manifold so far he isnt having any issues but i would still like to run an x

Where do u guys get the three wire 02 sensors?p/n?

 

[96-1500]

Where do u guys get the three wire 02 sensors?p/n?

The auto parts store.