Flowmaster not that loud, any ideas? - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 04-10-2008
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Flowmaster not that loud, any ideas?

I got my Flowmaster 40 SIDO last fall... Well another guy got the same thing in my town from the same place and its hella louder than mine. Im not sure if mine is messed up or what. I did take the liberty to look to make sure the muffler said flowmaster on it. Is it supposed to be a more mellow tone or what?? Anything I can do to make it louder?
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Old 04-10-2008
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All Rangers have CA emissions from 2001 on. The CAT's are "auxilliary" mufflers and my Flowmaster 40 (old school, not the new design) isn't loud either.

It's normal. The only way around it is to remove CAT's and that's tricky and potentially illegal. I'm modifying my CA emissions system back to Federal standards but it remains to be seen if that will fly or if I'll have to go back.

To get back to Federal, get a 2000 front pipe (if there is one for a SOHC for that year) and a 2000 CAT (the 2 piece CAT on the pipe between the y-pipe and muffler). That 2000 CAT relocates your downstream O2 sensor to AFTER the second CAT. If you check your current system you'll see it's between those two CAT's.

That will give you Federal emissions, and make your PCM happy while elminating all those small CAT's on the y-pipe -- but I don't think it'll be that much louder.

Beyond what I just mentioned (which may still be illegal) the alternative is fully illegal and probably irresponsible: complete elimination of the CAT's.
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Old 04-10-2008
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So I can remove some of my cats cause I live in Texas?
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Old 04-10-2008
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Have a muffler shop remove your OEM cats and replace them with 2 Magnaflow High Flow converters.
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Old 04-10-2008
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Quote:
Originally Posted by Roach2004 View Post
So I can remove some of my cats cause I live in Texas?
No,My beater failed inpection cause someone cut the cat off
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Old 04-10-2008
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might have to do that with the cats (have a shop install the high preformance cats) Thanx for the feedback, glad its not like they screwed up my system
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Old 04-10-2008
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You sure its a 40 series? And not a 50 series or perhaps the 60 series? Usually the 40 series is loud. Wether it be the delta flow or the regular 40, which are basically the same except the delta 40 is quieter inside the cab, but same outside as the original.
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Old 04-10-2008
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yeah its a 40 series, the receipt says it too so idk... i may try to high flow cats and see if that helps. plus headers may do something.....
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Old 04-10-2008
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Id check and see if it really is a 40 series. It should say by the inlet side of the pipe a model number. You can check on flowmasters site and see which muffler you have by comparing the model numbers. Do you have the fake duals? or just a single out?
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  #10  
Old 04-10-2008
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i have a flow 40 on my 05 4.0, it is pretty loud/throaty. id check on the muffler to make sure its actually a 40 like stated above.
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Old 04-10-2008
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Somethings fishy here. I've had 3 different Flowmasters on my truck.......all were 40 series, but different mufflers(Original 40, Super 40, Delta 40). And they are all pretty loud....not loud, but beefy sounding and loud.

Are you positive you have a 40?? On the inlet side of the muffler, there's a part number laser etched into the case. Post that up and i'll look it up for you.

Pipe diameter, tail pipe location, exit location, where the muffler is mounted, what muffler you run.... all those are variables that will change the soundand loudness of the muffler.
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  #12  
Old 04-10-2008
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Good point. The more bends in the piping the louder it will be. And also, adding tips also changes the final note of the exhaust. Not to mention it looks nice.
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Old 04-10-2008
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v8 will help.
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Old 04-11-2008
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Quote:
Originally Posted by Ranger Kid17 View Post
The more bends in the piping the louder it will be.
No...not really. Just the fact that the exhaust actually exits outside of the vehicle, rather than sound bouncing off the shocks, bed, frame, etc.
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  #15  
Old 04-11-2008
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Thanx guys Ill check out the muffler this weekend, I havnt had the time yet. Ill get it and let you know
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  #16  
Old 04-11-2008
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atleast you guys can have loud cars/trucks.. check out massachussetts chapter 90 section 16.

http://www.mass.gov/legis/laws/mgl/90-16.htm

a cat fine for us is like 2grand, and we arent aloud to touch our exhust to make it louder or change it from stock. aparently they changed the law recently and made it illegal to even put an aftermarket muffler on thats the same tone as stock. also if you notice in there it states that you cant make any harsh or objectable noises with your automobile, so burnouts, blow off valves, open dumps on turbos, the wind of a supercharger, ext ext...

and they aparently copied the street racing laws from cali over to MA and we get the same fines as them now if we get cought racing or spectating..

i think florida is the only place that dosent have laws like this.. no emissions, and no safty inspection..
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  #17  
Old 04-11-2008
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You just have to have people in the know up here. My 94 F-150 has no cats and no mufflers. It's loud but passes inspection. And as long as it does there is noting the po-po's can do about it. (disclaimer: obviously I dont go around beating the hell out of it and not shifting til 6K either.)
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Old 04-11-2008
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The number one thing you can do w/o modifying the cats is to enlarge the mid pipe size. Id you have a stock sized mid pipe that's whats keeping it quiet.

btw, I have all stock up to where the mid pipe and back connect. From that point and rearwards its all 2.5" and sounds very good. Not too loud. but when I step on it, it'll give a nice growl.

Rich
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  #19  
Old 04-11-2008
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I would like to know which muffler it is as well, I want to find something less restrictive that will be quiet. I've already had too many loud vehicles.
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  #20  
Old 04-11-2008
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Dynomax SuperTurbo mufflers flow really well and are quiet. But they're not built like Flowmasters and what not. Not as rugged.
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  #21  
Old 04-21-2008
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rather than remove them do what i did and gut them. use a big pry bar and ram the honeycomb out of them
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  #22  
Old 04-21-2008
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My "old school" Flowmaster 40 is now a lot louder since I bumped the emissions back to Federal standards.
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  #23  
Old 04-21-2008
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n3elz. what all did you have to do to lower your truck down to federal standards? and where did you get the parts to do so?
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  #24  
Old 06-27-2008
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if u do not have inspection where u live, maybe try cuttin off the last cat I am going to try this when i get my super 40 if it isnt loud enough 4 cats is rediculous and cutting off the last one may not change alot but it can only get better might get a little louder idk we will c
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Old 07-07-2008
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when i get my exhaust done, im going to replace the cats with high flow cats.

or no cats...

gotta love nevada, as long as there's no codes being thrown when they plug into the obdII port, then you have no worries.
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