FLOWMASTERS!! Are there 3 kinds of 40 series 2 chambers??

89FHPLX · 01-17-2001, 12:21 AM

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.

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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

MiracleMax · 01-17-2001, 12:27 AM

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?

89FHPLX · 01-18-2001, 12:22 AM

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

Green92LX · 01-18-2001, 10:36 AM

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!)

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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.

Moxie · 01-18-2001, 12:08 PM

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.

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Moxie Racing

89FHPLX · 01-19-2001, 12:54 AM

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

MiracleMax · 01-19-2001, 01:03 AM

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

89FHPLX · 01-19-2001, 01:10 AM

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.

LX XLR8R · 01-19-2001, 01:25 AM

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..

89FHPLX · 01-19-2001, 02:40 AM

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

01-17-2001, 12:21 AM	#1
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	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

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01-17-2001, 12:27 AM	#2
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	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?

01-18-2001, 12:22 AM	#3
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	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
Green92LX Registered Member Join Date: Jun 1999 Location: North Haven,CT Posts: 336	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
Moxie Registered Member Join Date: Aug 2000 Location: Plymouth, MI Posts: 254	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
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	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
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	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

01-19-2001, 01:10 AM	#8
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	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.

01-19-2001, 01:25 AM	#9
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	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
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	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