View Poll Results: Flowmaster restricts more than stock muffler?
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Results 1 to 20 of 160
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05-26-2008, 01:52 PM #1
Flowmaster Restricts more than stock?
Once and for all i want to know if the Flowmaster muffler restrics more than stock.
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05-26-2008, 02:03 PM #2
Doubt it flows worse.
My dad wanted me to get flowmaster but i told him im geting magnaflow instead
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05-26-2008, 02:22 PM #3
- Join Date
- Oct 2007
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- Beaver Dam KY
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- 7,745
79 T/A -91 Firebird- 1998 Trans Am -Oynx Black
I think their single chambers are almost as good as a cutout.
Dyno Proven
Ive got the american thunder and I love it..
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05-26-2008, 02:56 PM #4
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- Jun 2006
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- USA
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- 43
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- 202
- 2001 WS6, 2003 SRT4(sold)
YES, assuming this poll is about the 80 series. I know from seat of the pants experience. Flowmaster 80 series muffler is the worst for performance.
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05-26-2008, 03:34 PM #5
If they do take form horsepower over stock It can't be more than 2-5hp if that.
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05-26-2008, 04:20 PM #6
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05-26-2008, 05:10 PM #7
if it does it isn't noticeable. buy it for the sound. if performance is a concern, you should be looking at duals.
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05-26-2008, 05:50 PM #8
- Join Date
- Oct 2007
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- Beaver Dam KY
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- 7,745
79 T/A -91 Firebird- 1998 Trans Am -Oynx Black
A guy right down the road from me has a straight pipe true dual(with x pipe) setup and with dual single chambers it only reduced output by 2 horsepower and no torque loss.
The 80s series sucka da wee wee tho
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05-26-2008, 09:06 PM #9
I don't buy a muffler for power gains, thats why I did LT's and an engine tune flowmaster flows more freely but it's the sound you should be going for when buying an after market muffler IMO.
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05-27-2008, 03:50 AM #10
un less u have a 98 single pipe ls1 then your stock muffler flows better then the flowmaster 80 s, imp they sound like crap and they make ls1's soune like 3.8 v6s. if any one cares to look it up maganflow is the best flowing and imp best sounding. close 2nd is borla not as loud but deep tone and flows close to magnaflow slp is junk as well
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05-27-2008, 10:30 AM #11
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- Dec 2002
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- 6,932
black- 2000 nhra edition formula
above is bullshit.
when speed inc swapped out my muffler back in 2000, they welded in a flowmaster 80 series into the stock piping.
on back to back dyno pulls, the flowmaster 80 made 7 rwhp over the stock set up.
while the flowmater 80 series isnt the best flowing muffler out there, its better than stock.2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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05-27-2008, 06:53 PM #12
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05-28-2008, 03:24 AM #13
I have td's with single chambers and they are 6 1/2" inlet to outlet. They sound really good, and my god are they loud! I was gonna go Magnaflow, but changed my mind at the last second.
Nice to see someone put up #'s before bashing them. My friend had a muffler shop gut his 80 series and it made the sound/seat of pants power so much better.
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05-28-2008, 04:21 AM #14
Flowmasters just dont flow baby
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05-28-2008, 04:37 AM #15
So you mean to tell me that a 6 1/2" long (4"case btw) muffler that is completely open except for a little v in the middle isn't gonna flow? I assume you are talking about the 80 series.... I will be putting my car on the dyno soon so I'm interested to see how freely they "do not flow"
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05-28-2008, 12:22 PM #16
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05-28-2008, 04:15 PM #17
As of right now the poll says Flowmaster 63 % other 33%........???????
Whats are thoughts on that guys ??????????????????
I have the Flowmaster and think it sounds like one of the best....
As far H.P. goes you could'nt prove otherwise.............2000 NBM WS6
/oo_________oo\
|==_/_ws6_\_==|
><(((º>´¯`·.¸¸.·´¯`·.¸¸><((((º>
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05-28-2008, 05:58 PM #18
^ flowmaster is proven do be worse with flow. not by dynos, but actually measuring air flow accurately. however, exhaust should always have sound as first priority. if you aren't looking at getting headers anytime soon, i'd suggest a loudmouth 1 or 2, or bassani if you like it deep. but its all preference.
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05-28-2008, 06:01 PM #19
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Red Tint Jewelcoat- 2008 Trailblazer SS
Personally...I am performance minded.
I pick an exhaust with performance in mind.
Then pick according to sound.
Although...nothing but Magnaflow for me now.
I can't seem to find it, but there is a flow chart of popular mufflers. Flowmaster is always at the bottom.
Does that relate to lower dyno numbers and ET's??? Probably. I am sure it depends on the set-ups.
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05-29-2008, 07:09 AM #20
^ I believe there is a chart on ls1sounds.com
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