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Technical => Engine Tech => Topic started by: 1979 Cougar XR7 on December 07, 2009, 12:04:10 AM

Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 07, 2009, 12:04:10 AM
im usually a true dual man
but i just bought this truck and dont feel like changing the exhaust right now

its a 1992 ford f150 4x4
5.8 with a single in dual out flowmaster
i love the tone of itbut i want it to be abit louder

it still has the cats on it and we have no emissions testing where i live would it be louder if i had the cats taken off and a pipe put in its place?
if so how much louder?
Title: Exhaust Question
Post by: vinnietbird on December 07, 2009, 06:50:08 AM
Removing the cats will make a difference,but not a huge difference.Just wait until you can install a new exhaust system.Be patient and do it right the first time.Also,louder exhaust doesn't always mean better exhaust.
Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 07, 2009, 06:45:20 PM
its just got 1 big cat
Title: Exhaust Question
Post by: hellsing73 on December 07, 2009, 09:50:06 PM
i thought they had 2cats and a resanater if i spelled it right
Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 07, 2009, 09:52:39 PM
naw its got one cat,,its a dual in single out cat
Title: Exhaust Question
Post by: bhazard on December 07, 2009, 11:24:47 PM
Keep a cat on that guzzelator.
Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 07, 2009, 11:43:35 PM
theres really no use in keeping it on there
its not helping anything ,it restricting air flow,,and if i take it off everyone says my flowmaster will sound alot better
Title: Exhaust Question
Post by: hellsing73 on December 08, 2009, 12:10:32 AM
if u want it louder u might have to go with diff series flowmasters. i have dalta flow 40 series but i would not recomeand u put them on your truck being its got 4x4 and it most likely has a 410 gear in the rearend so it would be realy lound at higher speeds
Title: Exhaust Question
Post by: ~AC on December 08, 2009, 12:13:40 AM
could you put a stick in one end and out the other. well a metal pipe?  you can take it off and knpen 15 the honeycomb ceramic out of it it, reinstall it and it's basically catless.  unless its welded on.. WHY DO EXHAUST GUYS WELD BRACKETS SO YOU MAY NEVER REMOVE AN EXHAUST GOD
Title: Exhaust Question
Post by: bhazard on December 08, 2009, 10:05:05 AM
I meant get a new cat on it. Newer ones flow pretty good. You obviously have no idea how much  that old v8 is throwing into the air. I like breathing.

Besides its not like its a bottleneck on your stock truck engine.

Just saying...

Also don't just pound the honeycomb out, cut the whole thing out. You'll get a good $50 or better for it. That'll pay for a new hi flow.
Title: Exhaust Question
Post by: ~AC on December 08, 2009, 01:29:23 PM
yeh but just knocking the ceramic  out of it is cheaper but yeh if you have the tools that prolly would pay for a hi flow like you say bhaz
Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 08, 2009, 07:24:42 PM
why gut it ,im just gona get rid of it
and im sure me not having a cat isnt going to keep you from breathing"bhazard "
Title: Exhaust Question
Post by: bhazard on December 08, 2009, 07:36:45 PM
Right who am I to say anything like that, none of my cars have cats.

But theyre all small halfengines between 1.3 and 2.3 liters and get 25-50 mpg's and could probably pass smog checks without a cat.

Thats what trees are for anyway, to turn our pollution into clean air. They should plant more trees in kalifornias cities, right?
Title: Exhaust Question
Post by: Kitz Kat on December 08, 2009, 08:03:02 PM
You boy's are messed up!
Title: Exhaust Question
Post by: 1979 Cougar XR7 on December 08, 2009, 08:33:53 PM
yep they should
i wish i got 30 mpgs
Title: Exhaust Question
Post by: bhazard on December 09, 2009, 12:18:54 AM
Get yourself a little tin can to putter around in then. Save the guzzeler for those speshul occaisions :)
Title: Exhaust Question
Post by: Haystack on December 09, 2009, 04:43:58 AM
I have gotten over 30mpg several times on the freeway with my v-8 bird. Back in the day my old 86 cat had a clogged catilitic converter and they said that that is why it wouldn't pass emissions. I punched out the honey comb in it, and it got even better then it did with the same cat several years before it.

You don't need a small engine to get good gas mileage, although, it definitely helps, and a cat isn't always better for emissions. City I drive under 40mph with less then 10 minutes drive time generally and can get over 17 city.
Title: Exhaust Question
Post by: 86caprirs on December 23, 2009, 06:09:22 AM
I have a 95 f-150 5.8L 4x4 and I am only running shorty headers with the dual factory cats on it and no ler. It sounds pretty good to me.I want to cut them off too and do a y pipe to a 3" cat back. But I don't think I will get better gas milage or better performance.The Cam kinda kils ya there.

A guy at work with a 460 in his 97 f-250 took out the cat and it sounds pretty good.
Title: Exhaust Question
Post by: Nate on December 25, 2009, 08:34:46 AM
this might be late but, the loudest exhaust i did on a car so far was shortie headers, 2.5" pipe with no cats, mac prochamber, and flowmaster single chamber lers. having true duel exhaust or a cross over makes it louder then having a y pipe, and having the pipe get bigger as you go to the end makes it louder too, like a trumpet... anyway with that combo on a mark VII i'd set off car alarms everywhere lol. the only thing louder was when i ran nothing but my long tubes, or my friends car with true duel straight pipes... but that sounds like poop with no cross over imo.