Dual Cats
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Freshman User
Joined: Oct 2000
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Dual Cats
I have a '87 F250 300-I6. It has a the dual catalytics on it. Would it reduce back pressure to much if i were to remove one or even both of these.. I have a 24" glasspack on there now.
Thanks for the help
Troy
Thanks for the help
Troy
Postmaster
Joined: Jul 1999
Posts: 3,172
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Dual Cats
I removed one of mine 5 or 6 yrs ago & it made a considerable improvement in low end performance . The only problem you may encounter is emmision testing . I dont know how removing one will affect what a tailpipe test will show ? I cut the front one off , broke out all the catalyst material & welded the convertor shell back exactly as it was before I removed it .
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Freshman User
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Dual Cats
Thanks for the info. I dont know about the testing either. I dont have to worry about emissions testing where i am at. What was your reasoning on putting the shell back on? What is the best way to cut them off?
Thanks
Troy
Thanks
Troy
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Joined: Jul 1999
Posts: 3,172
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Dual Cats
The reason I put the shell back on was because of the way the pipe is designed , It was just easier to put it back because it fit & it doesnt look like its been tampered with . I used a Sawzall to cut it off , took less than 5 mins .
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Joined: Sep 2000
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From: Castine, ME
Dual Cats
In the case of dual cats on a single exhaust, the first cat is a light-off catalyst type followed by the primary conventional oxidation catalyst or three way catalyst mounted downstream. this system, was designed for states with low emissions tollerances so if you don't have to worry about emmissions testing, why not go ahead and yank out both cats? If they are original, you can be sure they have already passed their useful life and are doing nothing more than inflicting a major source of restriction . This is the case with my truck and its dual cats; they have past their useful life and will have to be replaced (I am not so lucky as to not have to worry about emmissions). Hope that helps a little
Captain Tim Bland
'86 F150 2WD LWB
300 I6 1BBL
bone stock (not for long!!)
Captain Tim Bland
'86 F150 2WD LWB
300 I6 1BBL
bone stock (not for long!!)
