Think ALL Flowmaster mufflers lose power? Think again...
12-14-2007, 11:34 PM
#1
Think ALL Flowmaster mufflers lose power? Think again... I rented some dyno time for a few tests today, one was to see how much power my single chamber flowmasters were robbing me. So I did a baseline with them on, then yanked em off for the next pull. The results were shocking to say the least! With no mufflers on my true duals and x-pipe setup, it picked up only 2rwhp, and the torque remained the same! So much for worrying about losing power to sound good
12-14-2007, 11:35 PM
#2
I rented some dyno time for a few tests today, one was to see how much power my single chamber flowmasters were robbing me. So I did a baseline with them on, then yanked em off for the next pull. The results were shocking to say the least! With no mufflers on my true duals and x-pipe setup, it picked up only 2rwhp, and the torque remained the same! So much for worrying about losing power to sound good
12-15-2007, 02:25 AM
#4
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I rented some dyno time for a few tests today, one was to see how much power my single chamber flowmasters were robbing me. So I did a baseline with them on, then yanked em off for the next pull. The results were shocking to say the least! With no mufflers on my true duals and x-pipe setup, it picked up only 2rwhp, and the torque remained the same! So much for worrying about losing power to sound good
12-15-2007, 08:15 AM
#5
That's pretty much the results I was expecting from a test like this. The different series might lose different amounts, but I don't think it's gonna be as much as the Flowmaster bashers make it out to be.
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12-15-2007, 09:31 AM
#9
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Those aren't the Flowmasters that suck - I've run the single chambers on my car and had the same results as you...
The stock type crossflow Flowmaster is the one that sucks - have seen cars consistently pick up 20 to 25 rwhp with a cutout open on a crossflow Flowmaster... not just one, at least 8 or 10 cars...
The stock type crossflow Flowmaster is the one that sucks - have seen cars consistently pick up 20 to 25 rwhp with a cutout open on a crossflow Flowmaster... not just one, at least 8 or 10 cars...
12-15-2007, 10:22 AM
#10
The Flowmaster design is proven and it's known to make around the same power as an open pipe when you use the proper configuration. Dual Flows on an F-body make for a great sounding, great performing exhaust. But this does not apply to the Crossflow design that mimicks the stock F-body muffler. Those sound wonderful but their performance is a step down from most other performance catbacks. They give Flowmaster a bad name.
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2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
12-15-2007, 12:04 PM
#12
The single chambers are 10 series.
Catbacks can use the stock, ory, or catted Ys. This is a true dual setup however.
I have seen this as well. However, on this day, my car was making nearly identical numbers on un-changed pulls. I don't have the graph yet to see the times between. This pull with the mufflers off was the 4th pull.
Also guys, I understand that all the Flowmaster mufflers aren't poor performers. And yes, I DO know that the 80 series is the bad apple. I just did this test to see the results for myself, and to share with whoever might be interested, cause I have read, and have heard people say, that even these 10 series flows weren't gonna be as great in comparison to other choices by a significant margin.
Catbacks can use the stock, ory, or catted Ys. This is a true dual setup however.
Also guys, I understand that all the Flowmaster mufflers aren't poor performers. And yes, I DO know that the 80 series is the bad apple. I just did this test to see the results for myself, and to share with whoever might be interested, cause I have read, and have heard people say, that even these 10 series flows weren't gonna be as great in comparison to other choices by a significant margin.
12-15-2007, 07:36 PM
#19
I'm one of the guys that removed a 2-chamber Flowmaster (non-crossflow design) and picked up 45 rwhp on a 305 rwhp combo.
I like my Magnaflow because it's quiet and 700 rwhp car doesn't gain anything when I remove it. To me, THAT's impressive. It flow's AND muffles. I had good luck with SLP and the Aerochamber crossflow also. SpinTech sucks, though. +3 mph in the quarter when removing a single 3.5".
Mike