the truth about flowmasters.
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
Likes: 240
From: Toronto Ontario
Toronto Events Coordinator
Originally Posted by flood
"We do not flow test our flowmasters!"
How then can you say they are the masters of flow?
thats almost as good as the accounting company here that said "we have spend countless hours on this project"
How then can you say they are the masters of flow?
thats almost as good as the accounting company here that said "we have spend countless hours on this project"
Thats funny! Check out this page, where they are describing the new super 40 muffler.............read the first one about how it flows, how do they know if they don't test them for this??????
The ORIGINAL and bestest
Joined: Oct 2000
Posts: 10,009
Likes: 240
From: Toronto Ontario
Toronto Events Coordinator
Originally Posted by flood
"We do not flow test our flowmasters!"
How then can you say they are the masters of flow?
thats almost as good as the accounting company here that said "we have spend countless hours on this project"
How then can you say they are the masters of flow?
thats almost as good as the accounting company here that said "we have spend countless hours on this project"
Thats funny! Check out this page, where they are describing the new super 40 muffler.............read the first one about how it flows, how do they know if they don't test them for this??????
http://www.flowmastermufflers.com/cg...ml?id=RFDJ79QW
Instructor
Joined: Jul 2004
Posts: 245
Likes: 0
Originally Posted by Z-man
Has anyone run a 3" system under their Vette?
I have a 3" system on my '77. It has Flowmaster 40's...they are mounted in front of the rear axle assembly. The previous owner installed the system. He installed cutouts and had a H pipe installed...until he had to overhaul the tranny. He ended up cutting the H pipe out and welded up plates to cover the holes.
My plan is to have a better 3" system run and go with my personal favorites...Walker Ultra-Flows. I have had the Walker Super Turbos and didn't care for the drone at hiway speeds...the Ultra-Flows don't have that problem in my experiance. My last car was a '66 Dodge Coronet running a built 440 big block with a 3" system and Ultra-Flows that I literally was able to roll a tennis ball through. Sounded mean as hell when running hard...almost like NO muffler...but was just aggressive enough when normal cruising.
Jeff
Drifting
Joined: Jan 2002
Posts: 1,484
Likes: 0
From: Northampton Ma
Hopefully I'll have my car dyno tuned in May. I currently have the flowmaster 40's, but plan to change to dynomax ultra-flows. I'll test it with the 40's, then have them put on the ultra-flows and see what we get. I'll post the results 
Race Director
Joined: Feb 2005
Posts: 16,100
Likes: 17
Originally Posted by Ryan77
Hopefully I'll have my car dyno tuned in May. I currently have the flowmaster 40's, but plan to change to dynomax ultra-flows. I'll test it with the 40's, then have them put on the ultra-flows and see what we get. I'll post the results
Drifting
Joined: Jun 2002
Posts: 1,620
Likes: 7
From: Orlando Florida
Originally Posted by 7t2vette
It seems everyone has a different opinion on this matter,talk to 10 diffferent people and you will get 10 answers, and since I am not an engineer in this field, it is hard to figure out the truth. How does the average guy wade through all the BS numbers and claims to get to the truth? I personally like the sound of Flows, and they have a new muffler out now called the Super 40 that they saw outflows and makes more power than any other one they have made before........with less interior resonance. All of you guys who claim that they are no good, what scientific proof do you have to back this up? I have a "doubting Thomas" personality type, I don't believe much of anything unless I see it with my own eyes, and it can be backed up with hard evidence. I think this can apply to just about every type of aftermarket performance part made, so much hype and BS numbers everywhere!!!
I've ran the things (flowmasters) for years and really never had a problem. How much power can you really gain from a Walker to a Borla to a Dynomax. 1 maybe 2 h.p?.
Big deal, I like the sound anyway, and I'm running those big azz 50 series Flowmasters with 3" exhaust.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Originally Posted by 406shark
I have a 3" system on my '77. It has Flowmaster 40's...they are mounted in front of the rear axle assembly. The previous owner installed the system. He installed cutouts and had a H pipe installed...until he had to overhaul the tranny. He ended up cutting the H pipe out and welded up plates to cover the holes.
Instructor
Joined: Jul 2004
Posts: 245
Likes: 0
Originally Posted by Z-man
My concern is that 3" pipes will have problems with the holes in the crossmember. Those holes measure 3-1/2". Does the '77 have these holes?
My '77 has the holes in each side...it is a tight fit...but it does fit without rubbing or rattle noise.
Jeff
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Racer
Joined: Jan 2004
Posts: 377
Likes: 1
From: Anchorage Alaska
Originally Posted by 406shark
My '77 has the holes in each side...it is a tight fit...but it does fit without rubbing or rattle noise.
Jeff
Jeff
Thank you.
Melting Slicks
Joined: Jun 2002
Posts: 2,842
Likes: 99
From: Orrtanna Pa.
I went with Edelbrock RPM's with a 3" in/out straight through design when I had the 3" system put on.All I can say is it was like night an day compared to the 2 1/2 inch system it replaced. There is some truth to the engine requirement though. If a mild 350 had the same system the effect of a 3" exhaust would not make that big of a difference.I run a 406 and it see's 6500 rpms from time to time,so I was able to notice a change.On a side note I thaught the RPM's resonated a bit too much at low rpms when they were new,but either they quieted down some,or I got used to it.Standing on the throttle and they sound like open pipes.I was at a Corvette cruise last May and pulled up next to a vette running the Hooker side mounts.You couldn't hear his car running at all over the thumping idle of my 406.
