read thru the links and sub -links or youll miss a good deal of info
http://www.mustang50magazine.com/techar ... index.html
and
http://www.pontiacstreetperformance.com/psp/exhaust.html
http://www.dapa.org/drag-racing-with-jim-hand-part-12-exhaust-system-update/
http://www.dragzine.com/tech-storie...ffler-design-and-sound-absorption-strategies/
http://www.superchevy.com/how-to/exhaust/0505phr-exh/
On the Dyno
Open Exhaust Bassani Bassani Real Street Borla XS Borla XR1 DynoMax Edelbrock Ultra Flo
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 103 196.7 87.1 182.9 89.9 188.8 111.7 213.4 102.1 195 105.1 200.7
3,000 138.9 243.1 109.1 208.4 107.2 204.7 148.3 259.6 141.1 247 140.9 246.7
3,250 168.6 272.4 146.2 255.9 148.6 260.2 176.6 285.4 168.9 273 168.4 272.2
3,500 189.6 284.5 173.2 279.8 177.1 286.2 195.4 293.2 189.1 283.7 189.3 284.1
3,750 202.3 283.3 192.3 288.5 194.8 292.3 207.9 291.1 203.7 285.3 204.5 286.4
4,000 214.6 281.8 204.8 286.8 208.3 291.8 219.2 287.8 215.6 283.1 214.9 282.2
4,250 239.6 296.1 216.6 284.3 220.7 289.8 244.3 301.9 243.2 300.5 243.1 300.4
4,500 269.5 314.5 241.3 298.2 244.7 302.4 274.1 319.9 270.9 316.2 271.9 317.3
4,750 291.6 322.4 272.3 317.8 274.1 319.9 294.6 325.7 295 326.2 295 326.1
5,000 308.7 324.2 293.7 324.7 295.5 326.8 310.1 325.7 311.7 327.4 310.9 326.5
5,250 326.3 326.4 308.7 324.3 310.9 326.6 329.4 329.6 330 330.2 329.2 329.3
5,500 345.7 330.1 329 329.1 330.8 330.9 348.3 332.6 349.8 334 349 333.2
5,750 359.2 328.1 349.3 333.5 349.6 333.8 363.8 332.3 362.4 331 362.8 331.4
6,000 365 319.5 361.4 330.1 364.1 332.6 370.9 324.6 370 323.9 368.7 322.8
6,250 365.2 306.9 369.3 323.3 371.2 324.9 373.3 313.7 369.6 310.6 369.4 310.4
6,500 358.8 289.9 372 312.6 373.7 314.1 369.2 298.4 369.8 298.8 367.4 296.9
Performer RPM Flowmaster Flowtech Afterburner Flowtech Terminator Flowtech Warlock FlowtechWarlock
(open)
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 105.3 201.2 102.8 196.3 103.9 198.4 102 194.8 102.6 195.9 109.5 209.1
3,000 143.9 251.9 140 245.1 140.9 246.7 138.9 243.2 142 248.6 151.5 265.1
3,250 170.6 275.7 168.9 273 168.4 272.2 170.3 275.1 169.4 273.7 178.9 289.1
3,500 190.2 285.5 189.4 284.1 189.8 284.9 189.1 283.8 185.6 278.5 193.3 290.1
3,750 203 284.4 202.8 284 202.9 284.1 202.4 283.4 199.7 279.7 207.1 290
4,000 215.1 282.4 213.2 279.9 212.9 279.5 213.2 279.9 211.6 277.8 220.8 290
4,250 242.6 299.8 242.2 299.3 240.5 297.2 241.6 298.6 237.8 293.9 248.1 306.6
4,500 272.2 317.7 271.7 317.1 270 315.1 270.7 316 264.4 308.6 276.9 323.2
4,750 294.6 325.7 291.2 322 292.7 323.6 294.1 325.2 281.9 311.8 292.9 323.9
5,000 310.3 326 306.6 322 306.8 322.3 307.4 322.9 295.7 310.6 306.2 321.7
5,250 328.2 328.4 327.6 327.7 325.9 326 326.8 327 318.3 318.4 328.5 328.7
5,500 347 331.3 347.4 331.8 345.7 330.1 346.9 331.3 340.7 325.3 348.8 333.1
5,750 362.2 330.9 361 329.7 359.7 328.6 361.3 330 356 325.2 362.3 331
6,000 368.7 322.7 369.4 323.3 368.4 322.5 368.4 322.5 363.1 317.8 370.7 324.5
6,250 370.9 311.7 368.3 309.5 372.3 312.9 369.5 310.5 366.3 307.8 374.2 314.4
6,500 366.1 295.8 363.7 293.9 366.3 296 366.2 295.9 363.7 293.9 369.7 298.8
Hooker Aerochamber Hooker MAXflow MAC MagnaFlow SpinTech
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 103.4 197.4 102.1 195 104.6 199.8 105.3 201.2 105.2 201
3,000 140.5 246 142 248.6 142.3 249.1 143.8 251.8 142.2 249
3,250 168.3 272 172.5 278.8 166.3 268.7 171.3 276.8 167.3 270.3
3,500 190.7 286.2 189 283.6 188.6 283 189.4 284.3 190 285.1
3,750 203.2 284.7 204 285.7 202.9 284.2 204.3 286.1 203.6 285.1
4,000 213.6 280.4 214.7 282 213.1 279.9 215.8 283.4 213.3 280
4,250 240.2 296.9 244.8 302.6 240.2 296.8 244.5 302.1 240.7 297.5
4,500 270.6 315.9 274.8 320.8 268.5 313.4 274.2 320.1 269.5 314.6
4,750 293.5 324.5 296.1 327.4 292.7 323.6 294.1 325.2 293 324
5,000 308.3 323.9 309.9 325.5 310.3 325.9 308.8 324.4 310.8 326.5
5,250 327.1 327.3 329 329.2 328.2 328.4 328.9 329 329 329.1
5,500 346 330.4 348.7 333 347.1 331.5 348.2 332.5 347.9 332.2
5,750 360.4 329.2 362.7 331.3 362.7 331.3 363.6 332.1 362.2 330.8
6,000 368.8 322.9 370.3 324.2 368.7 322.7 370.6 324.4 369.6 323.5
6,250 372.1 312.7 373.5 313.9 372.3 312.9 372.8 313.2 371.6 312.3
6,500 368.8 298 371.8 300.4 363 293.3 369.1 298.3 369.5 298.6
There's so much data here, we simply don't have room to dissect it all, but you have it now, so you can choose the mufflers you are interested in and run the numbers through Excel if you are really serious about eking out every last horsepower. If so, Rick Anderson says to pay particular attention to the average horsepower between 4,700 and 6,600 rpm. This range is critical for drag racing this combo. Rick says the best muffler in that range is the Bassani Real Street, but it's probably too loud for the street (and that's saying something coming from Rick). The Hooker MAXflow, both Borlas, and the MagnaFlow closely followed the Bassani RS with good average horsepower in that range. In the end, we say find one that sounds good to you and your wallet and go have fun.
Sounding Off
Muffler Decibels At Idle Decibels At 2,000 RPM Decibels At WOT
No Muffler 91 103 Max.
Bassani Street 83 96 120
Bassani Real Street 84 96 Max.
Borla XS 80 90 110
Borla XR1 83 96 118
DynoMax Ultra Flo 83 94 113
Edelbrock RPM 84 93 118
Flowmaster 82 93 115
Flowtech Afterburner 86 94 115
Flowtech Terminator 86 94 119
Flowtech Warlock 83 92 112
Hooker Aerochamber 87 94 114
Hooker MAXflow 80 90 120
MAC 87 98 119
MagnaFlow 82 91 114
SpinTech 87 97 116
an (X) pipe helps reduce noise and flow restriction
mocking it up
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
keep in mind adding an (X) pipe blends and splits the PULSED flow between the two sides of a dual exhaust , effectively cutting the flow each muffler sees in half. this reduces the restriction to flow.
read these
viewtopic.php?f=56&t=1503
viewtopic.php?f=56&t=495
viewtopic.php?f=56&t=1303
viewtopic.php?f=56&t=1166
viewtopic.php?f=56&t=3155
http://www.mustang50magazine.com/techar ... index.html
and
http://www.pontiacstreetperformance.com/psp/exhaust.html
http://www.dapa.org/drag-racing-with-jim-hand-part-12-exhaust-system-update/
http://www.dragzine.com/tech-storie...ffler-design-and-sound-absorption-strategies/
http://www.superchevy.com/how-to/exhaust/0505phr-exh/
On the Dyno
Open Exhaust Bassani Bassani Real Street Borla XS Borla XR1 DynoMax Edelbrock Ultra Flo
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 103 196.7 87.1 182.9 89.9 188.8 111.7 213.4 102.1 195 105.1 200.7
3,000 138.9 243.1 109.1 208.4 107.2 204.7 148.3 259.6 141.1 247 140.9 246.7
3,250 168.6 272.4 146.2 255.9 148.6 260.2 176.6 285.4 168.9 273 168.4 272.2
3,500 189.6 284.5 173.2 279.8 177.1 286.2 195.4 293.2 189.1 283.7 189.3 284.1
3,750 202.3 283.3 192.3 288.5 194.8 292.3 207.9 291.1 203.7 285.3 204.5 286.4
4,000 214.6 281.8 204.8 286.8 208.3 291.8 219.2 287.8 215.6 283.1 214.9 282.2
4,250 239.6 296.1 216.6 284.3 220.7 289.8 244.3 301.9 243.2 300.5 243.1 300.4
4,500 269.5 314.5 241.3 298.2 244.7 302.4 274.1 319.9 270.9 316.2 271.9 317.3
4,750 291.6 322.4 272.3 317.8 274.1 319.9 294.6 325.7 295 326.2 295 326.1
5,000 308.7 324.2 293.7 324.7 295.5 326.8 310.1 325.7 311.7 327.4 310.9 326.5
5,250 326.3 326.4 308.7 324.3 310.9 326.6 329.4 329.6 330 330.2 329.2 329.3
5,500 345.7 330.1 329 329.1 330.8 330.9 348.3 332.6 349.8 334 349 333.2
5,750 359.2 328.1 349.3 333.5 349.6 333.8 363.8 332.3 362.4 331 362.8 331.4
6,000 365 319.5 361.4 330.1 364.1 332.6 370.9 324.6 370 323.9 368.7 322.8
6,250 365.2 306.9 369.3 323.3 371.2 324.9 373.3 313.7 369.6 310.6 369.4 310.4
6,500 358.8 289.9 372 312.6 373.7 314.1 369.2 298.4 369.8 298.8 367.4 296.9
Performer RPM Flowmaster Flowtech Afterburner Flowtech Terminator Flowtech Warlock FlowtechWarlock
(open)
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 105.3 201.2 102.8 196.3 103.9 198.4 102 194.8 102.6 195.9 109.5 209.1
3,000 143.9 251.9 140 245.1 140.9 246.7 138.9 243.2 142 248.6 151.5 265.1
3,250 170.6 275.7 168.9 273 168.4 272.2 170.3 275.1 169.4 273.7 178.9 289.1
3,500 190.2 285.5 189.4 284.1 189.8 284.9 189.1 283.8 185.6 278.5 193.3 290.1
3,750 203 284.4 202.8 284 202.9 284.1 202.4 283.4 199.7 279.7 207.1 290
4,000 215.1 282.4 213.2 279.9 212.9 279.5 213.2 279.9 211.6 277.8 220.8 290
4,250 242.6 299.8 242.2 299.3 240.5 297.2 241.6 298.6 237.8 293.9 248.1 306.6
4,500 272.2 317.7 271.7 317.1 270 315.1 270.7 316 264.4 308.6 276.9 323.2
4,750 294.6 325.7 291.2 322 292.7 323.6 294.1 325.2 281.9 311.8 292.9 323.9
5,000 310.3 326 306.6 322 306.8 322.3 307.4 322.9 295.7 310.6 306.2 321.7
5,250 328.2 328.4 327.6 327.7 325.9 326 326.8 327 318.3 318.4 328.5 328.7
5,500 347 331.3 347.4 331.8 345.7 330.1 346.9 331.3 340.7 325.3 348.8 333.1
5,750 362.2 330.9 361 329.7 359.7 328.6 361.3 330 356 325.2 362.3 331
6,000 368.7 322.7 369.4 323.3 368.4 322.5 368.4 322.5 363.1 317.8 370.7 324.5
6,250 370.9 311.7 368.3 309.5 372.3 312.9 369.5 310.5 366.3 307.8 374.2 314.4
6,500 366.1 295.8 363.7 293.9 366.3 296 366.2 295.9 363.7 293.9 369.7 298.8
Hooker Aerochamber Hooker MAXflow MAC MagnaFlow SpinTech
RPM PWR TRQ PWR TRQ PWR TRQ PWR TRQ PWR TRQ
2,750 103.4 197.4 102.1 195 104.6 199.8 105.3 201.2 105.2 201
3,000 140.5 246 142 248.6 142.3 249.1 143.8 251.8 142.2 249
3,250 168.3 272 172.5 278.8 166.3 268.7 171.3 276.8 167.3 270.3
3,500 190.7 286.2 189 283.6 188.6 283 189.4 284.3 190 285.1
3,750 203.2 284.7 204 285.7 202.9 284.2 204.3 286.1 203.6 285.1
4,000 213.6 280.4 214.7 282 213.1 279.9 215.8 283.4 213.3 280
4,250 240.2 296.9 244.8 302.6 240.2 296.8 244.5 302.1 240.7 297.5
4,500 270.6 315.9 274.8 320.8 268.5 313.4 274.2 320.1 269.5 314.6
4,750 293.5 324.5 296.1 327.4 292.7 323.6 294.1 325.2 293 324
5,000 308.3 323.9 309.9 325.5 310.3 325.9 308.8 324.4 310.8 326.5
5,250 327.1 327.3 329 329.2 328.2 328.4 328.9 329 329 329.1
5,500 346 330.4 348.7 333 347.1 331.5 348.2 332.5 347.9 332.2
5,750 360.4 329.2 362.7 331.3 362.7 331.3 363.6 332.1 362.2 330.8
6,000 368.8 322.9 370.3 324.2 368.7 322.7 370.6 324.4 369.6 323.5
6,250 372.1 312.7 373.5 313.9 372.3 312.9 372.8 313.2 371.6 312.3
6,500 368.8 298 371.8 300.4 363 293.3 369.1 298.3 369.5 298.6
There's so much data here, we simply don't have room to dissect it all, but you have it now, so you can choose the mufflers you are interested in and run the numbers through Excel if you are really serious about eking out every last horsepower. If so, Rick Anderson says to pay particular attention to the average horsepower between 4,700 and 6,600 rpm. This range is critical for drag racing this combo. Rick says the best muffler in that range is the Bassani Real Street, but it's probably too loud for the street (and that's saying something coming from Rick). The Hooker MAXflow, both Borlas, and the MagnaFlow closely followed the Bassani RS with good average horsepower in that range. In the end, we say find one that sounds good to you and your wallet and go have fun.
Sounding Off
Muffler Decibels At Idle Decibels At 2,000 RPM Decibels At WOT
No Muffler 91 103 Max.
Bassani Street 83 96 120
Bassani Real Street 84 96 Max.
Borla XS 80 90 110
Borla XR1 83 96 118
DynoMax Ultra Flo 83 94 113
Edelbrock RPM 84 93 118
Flowmaster 82 93 115
Flowtech Afterburner 86 94 115
Flowtech Terminator 86 94 119
Flowtech Warlock 83 92 112
Hooker Aerochamber 87 94 114
Hooker MAXflow 80 90 120
MAC 87 98 119
MagnaFlow 82 91 114
SpinTech 87 97 116
an (X) pipe helps reduce noise and flow restriction
mocking it up
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
keep in mind adding an (X) pipe blends and splits the PULSED flow between the two sides of a dual exhaust , effectively cutting the flow each muffler sees in half. this reduces the restriction to flow.
read these
viewtopic.php?f=56&t=1503
viewtopic.php?f=56&t=495
viewtopic.php?f=56&t=1303
viewtopic.php?f=56&t=1166
viewtopic.php?f=56&t=3155
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