flowmaster JUNK mufflers
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flowmaster JUNK mufflers
One of my engine customers with a nice 383 Chevy engine has never run the quarter mile times like he should. We have talked about this MANY times. his one eigth mile times were OK, then it would dye the rest of the quarter mile. Just by accident, He removed his mufflers( flowmaster ) His quater mile times improved two to three tenths, and his MPH at the finishline went up FOUR MPH. In all the converdations we have had about why is car would not Mileanhour, I never asked him so he never told me about the flowmaster mufflers.Twice in my recall. I removed the flowmaster mufflers and one picked up 49 HP, and another picked 75 HP. I cant believe they can sell this stuff to everybody.Anyone else seen anything like this ?
JOE SHERMAN RACING ENGINES
JOE SHERMAN RACING ENGINES
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Tom Hand wrote a book on building Pontiac's for the street and strip. Great book. He also tested 54 different mufflers on the flow bench, engine stand (with professional noise measurements) and at the drag strip. He found the Flowmasters one of the least desirable mufflers available. Kinda backs up your experience on the dyno.
By the way Joe, did you use to race a black(?) 57 Chevy with a
400 SB?
Ron
By the way Joe, did you use to race a black(?) 57 Chevy with a
400 SB?
Ron
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good mufflers
The absolute BEST mufflers are the Magnflow. I have been doing ALL my dyno testing with them ever since the Engine Master first contest.
The other day, on a 985 HP BB Chevy, when I took the 4 inch magnaflow mufflers off, it only picked 5 HP- that is unbelieveable. I have twice seen the mufflers make MORE HP than the open headers. You cant beat it. THey are prrtty quiet too.
JOE SHERMAN RACING ENGINES
The other day, on a 985 HP BB Chevy, when I took the 4 inch magnaflow mufflers off, it only picked 5 HP- that is unbelieveable. I have twice seen the mufflers make MORE HP than the open headers. You cant beat it. THey are prrtty quiet too.
JOE SHERMAN RACING ENGINES
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Tom (Hand) is a good friend that turned me on to a great HD muffler...
http://www.goerlichs.com/product_sub_pa ... erator.asp
As tested [by Tom], they are quiet and offer a very minimal hp loss. He will tell you, as well as others, the Flowmaster are what we'll call... sub-optimal. <snicker>
The Goerlich muffler I purchased I have yet to run. They are a very large chamber, 3" in, 3" out, and a perforated straight pipe running through the center. They may not be for everyone, for my project (my dad's) it's a walk softly and carry a big stick scenario.
There are a some very good mufflers out there in the market, it's hard to go wrong. If you like load, excessive noise tickets, and hp loss then the Flowmaster fits the bill.
Clark
http://www.goerlichs.com/product_sub_pa ... erator.asp
As tested [by Tom], they are quiet and offer a very minimal hp loss. He will tell you, as well as others, the Flowmaster are what we'll call... sub-optimal. <snicker>
The Goerlich muffler I purchased I have yet to run. They are a very large chamber, 3" in, 3" out, and a perforated straight pipe running through the center. They may not be for everyone, for my project (my dad's) it's a walk softly and carry a big stick scenario.
There are a some very good mufflers out there in the market, it's hard to go wrong. If you like load, excessive noise tickets, and hp loss then the Flowmaster fits the bill.
Clark
The difference between genius and stupidity is that genius has it's limits. Albert Einstein
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I had the same poor experience with them on a budget drag car years ago. It lost .17 and 3 MPH every single time the mufflers went on.
Of course, I'm a slow learner so I let the local custom exhaust guy put some on my Corvette. After a 50-mile trip my ears are pounding from all the low-frequency booming noise.
Pure junk.
Of course, I'm a slow learner so I let the local custom exhaust guy put some on my Corvette. After a 50-mile trip my ears are pounding from all the low-frequency booming noise.
Pure junk.
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mufflers
I tested the longer Magnaflow mufflers ( 18 or 19 inch case) they actually made a few more HP than the shorter (14) length, The longer ones are soo quiet, you can hear the lifter noise and piston slap on startup. The ones I use on the dyno are about half as loud as flowmasters. I never have to wear head phones when I run the dyno anymore.
JOE SHERMAN RACING ENGINES
JOE SHERMAN RACING ENGINES
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If I had to guess-You guys are mainly talking about the 2 chamber flowmasters-I run the 1 chamber 3 inch on my BBC-Sounds like 1000 hp but realisticly 550 hp-I run 2- 5 inch long straight thru shoenfields at the ends- Tried to quiet it down-Probably a decimal at the most. I can't see how the 1 chamber could hurt-Mr Sherman have you ever dynoed the 1 chambers yet? Yrs ago I ran 7.4 1/8th mile with a sbc-Ran Dynomax super turbo-Took the exhaust off and it did not pickup anything