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01-17-2001, 12:21 AM | #1 |
Registered Member
Join Date: Aug 2000
Location: Miami, Florida
Posts: 116
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FLOWMASTERS!! Are there 3 kinds of 40 series 2 chambers??
I installed 2 chamber 40 series flowmasters. And the car sounds way to load inside the car especially when I get to 2000 RPM's. I dont know if Im correct but are there 3 kinds of 40 series? My friend has 2 chamber also with a H-pipe and his sounds nicer and alot lower.
------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies |
01-17-2001, 12:27 AM | #2 |
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Join Date: Apr 1999
Location: Hayes, Va, USA
Posts: 798
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Same h-pipe or is it different? That might have something to do with the interior resonance? As far as I know there is only one j=kind of 40 series 2 chamber mufflers, unless they have a regular and delta flow version?
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01-18-2001, 12:22 AM | #3 |
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Join Date: Aug 2000
Location: Miami, Florida
Posts: 116
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Nope Just the same H-pipe, but damm that thing is to laod at 2000 rpm's. is there a way to block that resonance even a little bit? does the sound come from mostly the back seats and the trunk area?
------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies |
01-18-2001, 10:36 AM | #4 |
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Join Date: Jun 1999
Location: North Haven,CT
Posts: 336
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Easy resolution...get Mac Flowpaths, and you'll never look back. I have both, and I can't wait till I finish the body and paint on my coupe so I could put the whole Mac system on that one too!! (Avoiding overspray!)
------------------ 1992 5.0 LX, Edelbrock 6037 Heads, Cobra Intake,E-303, 1.6 Rollers,65MM Holley TB, 75 MM Pro M Mass Air, 190 LPH FP w/ 24 lb injectors,BBK equal length shorties,offroad h-pipe,Mac Flowpath Cat-Back, Pro 5.0, 3.73's,Motorsport "C" springs,welded subframe connectors Daily driver: 89 notch with 200K plus, BBK shorties,offroad,2-chamber flowmasters with dumps, cut and welded stock shifter...and it runs like a champ. |
01-18-2001, 12:08 PM | #5 |
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Join Date: Aug 2000
Location: Plymouth, MI
Posts: 254
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There are two types of 40 Series (2-chamber): Standard and Delta Flow. The Deltas are Flowmaster's "new and improved" design. The scavenge exhaust gases a little better than the old style, so there's a little more torque. The biggest difference, however, is that the Delta Flow's have about 30% less interior resonance than the old style.
------------------ Moxie Racing |
01-19-2001, 12:54 AM | #6 |
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Join Date: Aug 2000
Location: Miami, Florida
Posts: 116
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The one's I have are delta's. My friend has 2 chamber flowmasters and they are not delta's but they sound better than mine. what's up with that?
------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies |
01-19-2001, 01:03 AM | #7 |
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Join Date: Apr 1999
Location: Hayes, Va, USA
Posts: 798
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Then thats the difference. the delta's have the additonal baffling behind the primary wedge in chamber. I suspect that they improve flow by reduxcing turbulence but the additoinal baffles also change the way the muffler resonates (much like the way you change the the notes on a musical instrument). Course my theory on that is if it makes more power whats the problem. My bro used my old Dr. Gas-X crossover and some of the local yokels joked him about it. To bad for them that it pumped up his mid-range a huge amount compared to the dual system he had before. It took a bit of getting used to but I prefer the sound more and liked the power improvement even better
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01-19-2001, 01:10 AM | #8 |
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Join Date: Aug 2000
Location: Miami, Florida
Posts: 116
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Yeah I gues I gotta get used to it but someday I will get rid of them. I like the power but not that load inside the car.
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01-19-2001, 01:25 AM | #9 |
Dirk Diggler
Join Date: Feb 1999
Location: SLOATSBURG, NY
Posts: 1,931
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well its 2 late to tell you 2 get MAC but a word of advise on your trip up here..crank the radio..your car at 2,000rpms in fith gear for hours at a time will put you to sleep..i gaurentee it..i dont know why but i was told that deep constant sounds like that do that to you and belive me its true
------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. |
01-19-2001, 02:40 AM | #10 |
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Join Date: Aug 2000
Location: Miami, Florida
Posts: 116
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Yeah I know, even here in city driving makes me go to sleep, But thats mostly because of the stupid drivers here and bad traffic. HEHEHE
------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies |
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