ler flow tests and Exhaust theory

Topic: ler flow tests and Exhaust theory (Read 30712 times) previous topic - next topic

ler flow tests and Exhaust theory

Reply #15 – April 18, 2008, 09:50:12 PM

The 5.0 Mustang mag's sound tests for the Hooker Maximum Flow are pretty dead on....one of the quietest at idle and one of the loudest at WOT. ha.

ler flow tests and Exhaust theory

Reply #16 – April 19, 2008, 09:29:00 AM

A-HA!!!!!

http://www.broaderperformance.com/ler%20flow%20test-A.htm
http://www.a-1performance.com/flow.htm

And perhaps the best article I can think of on this subject: http://www.popularhotrodding.com/enginemasters/articles/hardcore/0505em_exh/index.html

ler flow tests and Exhaust theory

Reply #17 – April 19, 2008, 12:36:28 PM

The two lists use a differerent water drop 15" versus 20.3" - too bad it makes comparision difficult. The one obvious thing here (and this has been proven out at dragstrips), Flowmaster lers flow like & cost HP.

Here is a more complete list of the first flow rates you listed. Note the Magnaflow don't flow as you might expect for a stragiht-through - but I'll take a HP test on an actual car anyday as the final arbiter.

All tests via an independent lab
All tests @ 15” wc

2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM

2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM

2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM

2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM

Standard OEM 2 ¼” Inlet/Outlet 138-152 CFM
Standard OEM 2 ½” Inlet/Outlet 161-197 CFM

The madrel bending of the pipes done by aftermarket exhaust companies is good for 2-4 h.p. depending on the severity of the stock bends. Most local exhaust places dont have a mandrel bender so changing the pipes out doesnt do anything if pipe size it not increased.

ler flow tests and Exhaust theory

Reply #18 – April 19, 2008, 01:11:25 PM

Quote

Flowmaster lers flow like & cost HP.

And this along with the fact they turn into solid rust in 6 months is why I have not and never will run them on a vehicle.

Quote

2 ½” Inlet/Outlet Borla Turbo 373 CFM

I wonder if this is the standard or the XR-1.....

Quote

Most local exhaust places dont have a mandrel bender

I know a couple that do

ler flow tests and Exhaust theory

Reply #19 – April 21, 2008, 12:51:33 AM

i gotta feeling this thread might get lost.

can conclusions be consolidated to one post so i can add it to my diy link?

also,,, i agree,
I would also like to see flow numbers on a bench with little or no pipe.

ler flow tests and Exhaust theory

Reply #20 – April 22, 2008, 12:00:16 AM

In super simplified terms:
Velocity and scavenging=Good.
Backpressure=Bad
Flowmasters=Suck

The ler in an exhaust system can be used just like exhaust pipe to extend the collector and add to wave pressure tuning.

ler flow tests and Exhaust theory

Reply #21 – April 22, 2008, 03:02:23 AM

USED Raven lers they don't make them anymore but i promise you will have a one of kind mean sounding ride.

Next i would vote SLP lers http://www.americanmuscle.com/slp-power-flo-lers.html

ler flow tests and Exhaust theory

Reply #22 – April 22, 2008, 10:06:07 AM

That post has ABSOLUTELY no technical input to add If you're going to post about a certain ler, you could have found an independent test of it with technical data OR perhaps asked if anybody knew anything about it....Please stop post whoring, especially in a tech thread.....

ler flow tests and Exhaust theory

Reply #23 – April 22, 2008, 11:12:37 AM

I hear you - "this is my favorite ler" is hardly helpful to this thread.

I'd be willing to delete all of my non-contributing posts in this thread (including this one) so it can be made into a sticky without to many BS posts.

ler flow tests and Exhaust theory

Reply #24 – April 23, 2008, 12:01:02 PM

OK, check out this thread -> Flowmaster JUNK lers

...makes me glad I chose the 18" Magnaflow - BigJoe said they made more power than the 14" magnaflow and a lot more than ClogMasters.

Glad this got sticky status too!

ler flow tests and Exhaust theory

Reply #25 – April 23, 2008, 12:58:56 PM

I use Flowtech Afterburners on mine. All they are is pipe into big hollow chamber and pipe out of big hollow chamber :hick:

ler flow tests and Exhaust theory

Reply #26 – July 30, 2008, 10:46:22 PM

Is there anyone who has a chart for these lers for the Turbo Coupe.

ler flow tests and Exhaust theory

Reply #27 – July 31, 2008, 02:16:35 AM

Quote from: 88TurboCoupeman01;229965

Is there anyone who has a chart for these lers for the Turbo Coupe.

If you can't see through the ler...it doesn't belong on a TC.

ler flow tests and Exhaust theory

Reply #28 – February 18, 2009, 09:54:20 AM

Well, I don't want Flowmasters anymore.... Thanks for helping me in my exhaust quest. Hmmm what to buy now?

ler flow tests and Exhaust theory

Reply #29 – February 18, 2009, 12:11:20 PM

I have that exact set of Borla ProXS lers used in that test on my car right now. I bought them for Anderson years ago. I'm quite happy with them. They are loud at WOT, but don't drone when cruising down the highway.