Sugmotor avgasgrenrör / headers, beräkna primärrörens längd

[d-p]

Finns det några guider på nätet ?

Vill veta mera om primärrörens längd
Primär rörens diameter
Collektor diameter osv

Motorn är en mild bigblock Cheva för dragracing

[Jens Gustavsson]

köp nyaste pipe max modellen ca 400kr

[d-p]

Kan detta program nåt mera ? mer än bara grenrör

[Erland Cox]

Det kan en hel del:


598.285 Cubic Inches @ 6800 RPM with 104.70 % Volumetric Efficiency PerCent

Required Intake Flow CFM @28 in. = 402.4 to 426.1 at .934 inch Valve Lift
Required Exhaust Flow CFM @28 in. = 283.8 to 307.5 at .834 inch Valve Lift

600 RPM/Sec Dyno Test Lowest Low Average Best
Peak HorsePower 980.4 1001.0 1013.8 1026.6
Peak Torque Lbs-Ft 834.3 856.3 865.5 878.2

HorsePower per CID 1.639 1.673 1.695 1.716
Torque per Cubic Inch 1.395 1.431 1.450 1.468
BMEP in psi 210.3 215.8 218.6 221.4
Carb CFM at 1.5 in Hg. 1233 1371 1441 1510

Recommended Intake Valve Lift to prevent Choke = .934 Lift @ 6800 RPM
Recommended Exhaust Valve Lift to prevent Choke = .834 Lift @ 6800 RPM
Recommended Minimum Normal Maximum Time-Area-Duration Lifts
Intake Valve Lift = 0.8290 0.9338 1.0272 0.8605 0.9070 0.9535
Exhaust Valve Lift = 0.7669 0.8335 0.9169 0.7693 0.8174 0.8656
IntOpen= 35.00 IntClose= 73.00 ExhOpen= 92.00 ExhClose= 38.00
Intake Duration @ .050 = 288.00 Exhaust Duration @ .050 = 310.00
Intake CenterLine = 109.00 Exhaust CenterLine = 117.00
Compression Duration= 107.00 Power Duration = 88.00
OverLap Duration = 73.00 Lobe Separation Angle (LSA)= 113.00
Camshaft Advanced = 4.00 degrees Cylinder Ignition Interval= 90 deg.

-- Operating RPM Ranges of various Components --
Best estimate RPM operating range from all Components = 5028 to 7028
Intake Flow CFM @28inches RPM Range from Flow CFM only = 4911 to 6911
Intake and Exhaust Systems operating RPM Range = 5767 to 7767
Intake and Exhaust Time-Area operating RPM Range = 5935 to 7935
Camshaft's Intake and Exhaust Lobes operating RPM range = 6781 to 8781
Intake Valve Curtain Time-Area at 0.988 Lift RPM Range = 5195 to 7195
Exhaust Valve Curtain Time-Area at 0.912 Lift RPM Range = 5440 to 7440

Intake Valve Close RPM = 8625 Exhaust Valve Open RPM = 9251
Intake System RPM = 7623 Exhaust System RPM = 7911
Intake Time-Area RPM = 7808 Exhaust Time-Area RPM = 8062
Intake Mach Z-Factor = 0.458752 Exhaust Mach Z-Factor = 0.627907
Intake Z-Factor Lift = 0.944265 Exhaust Z-Factor Lift = 0.867653

Curtain Area -to- Valve Area Convergence Intake Valve Lift inch= .588
Curtain Area -to- Valve Area Convergence Exhaust Valve Lift inch= .465

Target EGT= 1187.3 degrees F at end of 4 second 600 RPM/Sec Dyno accel. test
Octane (R+M)/2 Method = 111.9 to 113.9 Octane required range
Air Standard Efficiency = 66.23361 % for 14.500:1 Compression Ratio

------- Piston Motion Data -------
Average Piston Speed (FPM)= 5100.00 in Feet Per Minute
Maximum Piston Speed (FPM)= 8470.834 occurs at 72.84974 Degrees ATDC
Piston Depth at 72.850 degree ATDC= 1.9474 inches Cylinder Volume= 530.3 CC
Maximum TDC Rod Tension GForce= 3964.8010 G's
Maximum BDC Rod Compression GForce= 1945.3777 G's

----- Engine Design Specifications -----
( English Units ) ( per each Valve Sq.Inch area )
Engine Size CID = 598.285 Intake Valve Net Area = 4.246
CID per Cylinder = 74.786 Intake Valve Dia. Area = 4.337
Rod/Stroke Ratio = 1.463 Intake Valve Stem Area = 0.092
Bore/Stroke Ratio = 1.022 Exhaust Valve Net Area = 2.626
Int Valve/Bore Ratio = 0.511 Exhaust Valve Dia. Area = 2.717
Exh Valve/Bore Ratio = 0.404 Exhaust Valve Stem Area = 0.092
Exh/Int Valve Ratio = 0.791 Exh/Int Valve Area Ratio = 0.626
Intake Valve L/D Ratio= .420 Exhaust Valve L/D Ratio= .490
CFM/Sq.Inch = 92.8 to 98.2 CFM/Sq.Inch =111.1 to 117.2

Intake Valve Margin CC's Exhaust Valve Margin CC's
1.00 CC = 0.0141 1.00 CC = 0.0225
0.50 CC = 0.0070 0.50 CC = 0.0112
0.25 CC = 0.0035 0.25 CC = 0.0056
0.10 CC = 0.0014 0.10 CC = 0.0022

- Induction System Tuned Lengths - ( Cylinder Head Port + Manifold Runner )
1st Harmonic= 37.148 (usually this Length is never used)
2nd Harmonic= 21.084 (some Sprint Engines and Factory OEM's w/Injectors)
3rd Harmonic= 14.720 (ProStock or Comp SheetMetal Intake • best overall HP )
4th Harmonic= 11.586 (Single-plane Intakes , less Peak Torque • good HP )
5th Harmonic= 9.400 (Torque is reduced, even though Tuned Length)
6th Harmonic= 7.908 (Torque is reduced, even though Tuned Length)
7th Harmonic= 6.825 (Torque is greatly reduced, even though Tuned Length)
8th Harmonic= 6.003 (Torque is greatly reduced, even though Tuned Length)
Note> 2nd and 3rd Harmonics typically create the most Peak Torque
4th Harmonic is used to package Induction System underneath Hood

Plenum Runner Minimum Recommended Entry Area = 4.292 to 4.828 Sq.Inch
Plenum Runner Average Recommended Entry Area = 4.935 Sq.Inch
Plenum Runner Maximum Recommended Entry Area = 5.041 to 5.965 Sq.Inch

Minimum Plenum Volume CC = 1555.6 ( typically for Single-Plane Intakes )
Minimum Plenum Volume CID= 94.9 ( typically for Single-Plane Intakes )
Maximum Plenum Volume CC = 9804.1 ( typically for Tunnel Ram Intakes )
Maximum Plenum Volume CID= 598.3 ( typically for Tunnel Ram Intakes )

--- Cross-Sectional Areas at various Intake Port Velocities (@ 28 in.) ---
132 FPS at Intake Valve Curtain Area= 7.294 sq.in. at .988 Lift
223 FPS at Intake Valve OD Area and at Convergence Lift = .588
275 FPS 90% PerCent Rule Seat-Throat Velocity CSA= 3.513 sq.in.
--- 6800 RPM Intake Cross-sectional areas in Square Inches ---
350 FPS CSA= 2.757 Port has Sonic-Choke with HP Loss ( too fast FPS )
330 FPS CSA= 2.926 Port may have Sonic-Choke with HP Loss ( too fast FPS )
311 FPS CSA= 3.105 Highest useable Port velocity ( possible HP loss )
300 FPS CSA= 3.219 Smallest Port CSA ( Hi Velocity FPS • good TQ and HP )
285 FPS CSA= 3.388 Smallest Port CSA ( very good TQ and HP combination )
260 FPS CSA= 3.714 Recommended average Intake Port CSA (very good TQ and HP)
250 FPS CSA= 3.863 Largest recommended average Intake Port CSA ( good HP )
240 FPS CSA= 4.024 Largest recommended average Intake Port CSA (less Peak TQ)
235 FPS CSA= 4.109 Largest recommended Intake Port Gasket Entry area CSA
225 FPS CSA= 4.292 Largest Intake Port Gasket Entry CSA ( Slow FPS )
215 FPS CSA= 4.491 Possible Torque Loss with Reversion ( Slow FPS )
210 FPS CSA= 4.598 Torque Loss + Reversion possibility ( too slow FPS )
200 FPS CSA= 4.828 Torque Loss + Reversion possibility ( too slow FPS )
Note : these are calculated average Port cross-sectional areas and FPS

--- Cross-Sectional Areas at various Exhaust Port Velocities (@ 28 in.) ---
128 FPS at Exhaust Valve Curtain Area= 5.329 sq.in. at .912 Lift
251 FPS at Exhaust Valve OD Area and at Convergence Lift = .465
310 FPS 90% PerCent Rule Seat-Throat Velocity CSA= 2.201 sq.in. at 6800 RPM
--- 6800 RPM Exhaust Cross-sectional areas in Square Inches ---
435 FPS CSA= 1.566 Sonic Choke at Throat Area (too fast FPS velocity)
380 FPS CSA= 1.793 Sonic Choke at Throat Area (possibly too fast FPS)
350 FPS CSA= 1.945 Exhaust Port has Sonic-Choke with HP Loss (too fast)
330 FPS CSA= 2.064 Exhaust Port has Sonic-Choke with HP Loss (too fast)
311 FPS CSA= 2.190 smallest Exhaust Port ( very high velocity FPS )
300 FPS CSA= 2.271 smallest recommended Exhaust Port (Hi velocity)
285 FPS CSA= 2.390 smallest recommended Exhaust Port (Hi velocity)
265 FPS CSA= 2.571 Recommended average Exhaust Port CSA
250 FPS CSA= 2.725 Recommended average Exhaust Port gasket area
240 FPS CSA= 2.838 Recommended largest Exhaust Port gasket area
225 FPS CSA= 3.028 Largest Exhaust Port Exit gasket area (Slow FPS)
210 FPS CSA= 3.244 Largest Exhaust Port Exit gasket area (Slow FPS)
190 FPS CSA= 3.585 Torque Loss + Reversion + Scavenging loss (too slow FPS)
180 FPS CSA= 3.785 Torque Loss + Reversion + Scavenging loss (too slow FPS)
Note : these are calculated average Port cross-sectional areas and FPS



Cylinder Ignition Interval = 90 degrees 6800 RPM Hertz frequency = 56.7 Hz
Target EGT= 1187.3 degrees F at end of 4 second 600 RPM/Sec Dyno accel. test
598.285 CID Exhaust System operating RPM Range from 4800 to 7300 RPM

--- Single Primary Pipe Specs --- ( Low to Mid-Range RPM Torque and HP )
Diameter= 1.966 to 2.091 Total Length= 33.5 to 36.6 inches long
--- 2-Step Primary Pipe Specs --- ( Low to Mid-Range RPM Torque and HP )
1st Dia. inches= 1.966 Length= 16.8 to 18.3
2nd Dia. inches= 2.091 Length= 16.8 to 18.3
--- 3-Step Primary Pipe Specs --- ( Low to Mid-Range Torque and Hi RPM HP )
1st Dia. inches= 1.966 Length= 16.8 to 18.3
2nd Dia. inches= 2.091 Length= 8.4 to 9.2
3rd Dia. inches= 2.216 Length= 8.4 to 9.2

--- Single Primary Pipe Specs --- ( Mid-Range TQ to Higher RPM Horsepower )
Diameter= 2.166 to 2.291 Total Length= 33.5 to 36.6 inches long
--- 2-Step Primary Pipe Specs --- ( Mid-Range TQ to Higher RPM Horsepower )
1st Dia. inches= 2.166 Length= 11.2 to 12.7
2nd Dia. inches= 2.291 Length= 22.4 to 23.9
--- 3-Step Primary Pipe Specs --- ( Higher RPM Horsepower, possible TQ loss )
1st Dia. inches= 2.166 Length= 11.2 to 12.7
2nd Dia. inches= 2.291 Length= 11.2 to 12.0
3rd Dia. inches= 2.416 Length= 11.2 to 12.0

--- Conventional Straight Tube Collector Specs ---
( TQ ) Diameter= 3.779 to 4.029 Best Length= 17.8 and also 35.5 inches
( HP ) Diameter= 4.029 to 4.529 Best Length= 17.8 and also 8.9 inches
--- Megaphone Collector Specs ---( Diffuser or Diverging Cone Shape )---
( TQ ) Diameter= 3.029 taper to 4.029 Best Length= 17.8 or 35.5 inches
( HP ) Diameter= 3.279 taper to 4.279 Best Length= 17.8 or 35.5 inches

H-Pipe= 17.8 X-Pipe= 71.0 distance behind end of Primary Tube ends

-- Total Exhaust System Tuned Lengths (Primary ends to TailPipe end) --
Best HP/TQ Tuned Collector Lengths= 17.8 , 35.5 , 71.0 , 142.0 inches long
Worst HP/TQ Loss Collector Lengths= 26.6 , 53.3 , 106.5 , 213.1 inches long
Note=> measured from where the Primary Pipes end inside the Collector to
the point the Collector or tailpipe exits into the atmosphere.

Note-> all Pipe Diameters are OD and based-off .0625 inch Pipe thickness

---- Primary Pipe's Harmonics ----
1st Harmonic = 148.6 inches long ... typically never used
2nd Harmonic = 56.2 inches long ... longest recommended
3rd Harmonic = 33.5 inches long ... highly recommended , best Torque Curve
4th Harmonic = 23.3 inches long ... shortest recommended
5th Harmonic = 17.4 inches long ... typically never used
6th Harmonic = 13.7 inches long ... typically never used
7th Harmonic = 11.0 inches long ... typically never used
8th Harmonic = 9.1 inches long ... typically never used

---- Collector's Harmonics (includes Intermediate, Muffler , TailPipe) ----
1st Harmonic = 142.0 inches long ... longest with Mufflers and TailPipes
2nd Harmonic = 71.0 inches long ... longest recommended with Mufflers
3rd Harmonic = 35.5 inches long ... more bottom-end Torque
4th Harmonic = 17.8 inches long ... highly recommended , best Torque Curve
5th Harmonic = 8.9 inches long ... reduced Torque , more top-end HP sometimes
6th Harmonic = 4.4 inches long ... reduced Torque , not recommended


Erland

[d-p]

Tack Erland

Ja det var ju en hel del info ...
Lite överkurs på min nivå, men mkt intressant

[Erland Cox]

Jag har en liten förklaring som borde göras bättre på min hemsida: http://www.topplocksverkstan.se/fyrtaktsidpipemax.html
Om du köper det så kan du alltid fråga mig om du behöver hjälp.
Det finns även ett forum för Pipemaxanvändare där man kan få hjälp.

Erland

[d-p]

Låter bra men denna vinter går åt till att få ordning på chassi och kaross
Bilen är en Harwood 27 T Roadster på svenskbyggt rörchassi, se bilder nedan
Har varit 7,50 taggat, men är nu 10,00, kanske byter det som behövs för att få 7,50 igen ?

Ska inte köra nån serie eller cup utan bara ha en mysdragracingbil att leka lite med
Behöver inte gå så fort ... bracket ?
Ska byta sida från att titta på till att köra lite, det är dags, tittat på dragracing sen -78 ...

Bilen lär väga 900kg med förare, så med en mild 454 + PG lär det nog bli kul ändå ...

Det enda som jag skulle behöva är en headers beräkning
Kan du köra / beräkna en snabbis i programmet ?
* Primär rörens längd ( från ventilen ? )
* Primär rörens diameter
* Collektorns diameter
* längd på collektorn

Motor data
461"
Ovalport 049 topplock med org storlek på ventiler
Kam för 3000-6000rpm
Holley strip dominator insug med en 750cfm Barry Grant Race Deamon
Komp vet jag inte än, ska byta kolvar, std i nu med runt 8,0:1
( F.d båtmotor )

Motorn är linehonad, borrad, deckad osv

[d-p]

Rören jag ska bygga lär väl se ut nåt sånt här:

[Erland Cox]

Fräck bil, Jörgen Jonsson hade en sån byggd av Warren Broogie när jag först började titta på drag racing.
Du bör byta insugningsventiler till 2.19 eller ännu bättre 2,25".
Du måste ha massor av kam bara för att varva 5000 varv.
Ford 429 och 460 har 11/32" skaft 2,25" ventil som passar om man sleevar ner Cheva toppen.


466.868 Cubic Inches @ 5000 RPM with 105.00 % Volumetric Efficiency PerCent

Required Intake Flow CFM @28 in. = 230.6 to 244.2 at .605 inch Valve Lift
Required Exhaust Flow CFM @28 in. = 183.2 to 198.5 at .550 inch Valve Lift

600 RPM/Sec Dyno Test Lowest Low Average Best
Peak HorsePower 472.7 482.6 488.8 495.0
Peak Torque Lbs-Ft 547.6 562.0 568.0 576.4

HorsePower per CID 1.012 1.034 1.047 1.060
Torque per Cubic Inch 1.173 1.204 1.219 1.235
BMEP in psi 176.9 181.5 183.8 186.2
Carb CFM at 1.5 in Hg. 709 789 829 869

Recommended Intake Valve Lift to prevent Choke = .605 Lift @ 5000 RPM
Recommended Exhaust Valve Lift to prevent Choke = .550 Lift @ 5000 RPM
Recommended Minimum Normal Maximum Time-Area-Duration Lifts
Intake Valve Lift = 0.5374 0.6054 0.6659 0.6519 0.6872 0.7224
Exhaust Valve Lift = 0.5063 0.5503 0.6053 0.5926 0.6297 0.6668
IntOpen= 24.00 IntClose= 56.00 ExhOpen= 64.00 ExhClose= 16.00
Intake Duration @ .050 = 260.00 Exhaust Duration @ .050 = 260.00
Intake CenterLine = 106.00 Exhaust CenterLine = 114.00
Compression Duration= 124.00 Power Duration = 116.00
OverLap Duration = 40.00 Lobe Separation Angle (LSA)= 110.00
Camshaft Advanced = 4.00 degrees Cylinder Ignition Interval= 90 deg.

-- Operating RPM Ranges of various Components --
Best estimate RPM operating range from all Components = 3166 to 5166
Intake Flow CFM @28inches RPM Range from Flow CFM only = 3062 to 5062
Intake and Exhaust Systems operating RPM Range = 3413 to 5413
Intake and Exhaust Time-Area operating RPM Range = 3024 to 5024
Camshaft's Intake and Exhaust Lobes operating RPM range = 4114 to 6114
Intake Valve Curtain Time-Area at 0.650 Lift RPM Range = 3369 to 5369
Exhaust Valve Curtain Time-Area at 0.600 Lift RPM Range = 3452 to 5452

Intake Valve Close RPM = 6098 Exhaust Valve Open RPM = 6163
Intake System RPM = 5388 Exhaust System RPM = 5439
Intake Time-Area RPM = 4985 Exhaust Time-Area RPM = 5062
Intake Mach Z-Factor = 0.452037 Exhaust Mach Z-Factor = 0.585396
Intake Z-Factor Lift = 0.612133 Exhaust Z-Factor Lift = 0.532178

Curtain Area -to- Valve Area Convergence Intake Valve Lift inch= .520
Curtain Area -to- Valve Area Convergence Exhaust Valve Lift inch= .435

Target EGT= 1316.1 degrees F at end of 4 second 600 RPM/Sec Dyno accel. test
Octane (R+M)/2 Method = 100.2 to 101.0 Octane required range
Air Standard Efficiency = 62.22586 % for 11.000:1 Compression Ratio

------- Piston Motion Data -------
Average Piston Speed (FPM)= 3333.33 in Feet Per Minute
Maximum Piston Speed (FPM)= 5509.718 occurs at 73.46570 Degrees ATDC
Piston Depth at 73.466 degree ATDC= 1.7381 inches Cylinder Volume= 415.6 CC
Maximum TDC Rod Tension GForce= 1883.1429 G's
Maximum BDC Rod Compression GForce= 957.1968 G's

----- Engine Design Specifications -----
( English Units ) ( per each Valve Sq.Inch area )
Engine Size CID = 466.868 Intake Valve Net Area = 3.287
CID per Cylinder = 58.359 Intake Valve Dia. Area = 3.398
Rod/Stroke Ratio = 1.534 Intake Valve Stem Area = 0.110
Bore/Stroke Ratio = 1.078 Exhaust Valve Net Area = 2.267
Int Valve/Bore Ratio = 0.483 Exhaust Valve Dia. Area = 2.378
Exh Valve/Bore Ratio = 0.404 Exhaust Valve Stem Area = 0.110
Exh/Int Valve Ratio = 0.837 Exh/Int Valve Area Ratio = 0.700
Intake Valve L/D Ratio= .313 Exhaust Valve L/D Ratio= .345
CFM/Sq.Inch = 67.9 to 71.9 CFM/Sq.Inch =77.8 to 81.1

Intake Valve Margin CC's Exhaust Valve Margin CC's
1.00 CC = 0.0180 1.00 CC = 0.0257
0.50 CC = 0.0090 0.50 CC = 0.0128
0.25 CC = 0.0045 0.25 CC = 0.0064
0.10 CC = 0.0018 0.10 CC = 0.0026

- Induction System Tuned Lengths - ( Cylinder Head Port + Manifold Runner )
1st Harmonic= 45.626 (usually this Length is never used)
2nd Harmonic= 25.896 (some Sprint Engines and Factory OEM's w/Injectors)
3rd Harmonic= 18.079 (ProStock or Comp SheetMetal Intake • best overall HP )
4th Harmonic= 14.230 (Single-plane Intakes , less Peak Torque • good HP )
5th Harmonic= 11.545 (Torque is reduced, even though Tuned Length)
6th Harmonic= 9.713 (Torque is reduced, even though Tuned Length)
7th Harmonic= 8.383 (Torque is greatly reduced, even though Tuned Length)
8th Harmonic= 7.373 (Torque is greatly reduced, even though Tuned Length)
Note> 2nd and 3rd Harmonics typically create the most Peak Torque
4th Harmonic is used to package Induction System underneath Hood

Plenum Runner Minimum Recommended Entry Area = 2.460 to 2.767 Sq.Inch
Plenum Runner Average Recommended Entry Area = 2.828 Sq.Inch
Plenum Runner Maximum Recommended Entry Area = 2.889 to 3.419 Sq.Inch

Minimum Plenum Volume CC = 892.6 ( typically for Single-Plane Intakes )
Minimum Plenum Volume CID= 54.5 ( typically for Single-Plane Intakes )
Maximum Plenum Volume CC = 7650.6 ( typically for Tunnel Ram Intakes )
Maximum Plenum Volume CID= 466.9 ( typically for Tunnel Ram Intakes )

--- Cross-Sectional Areas at various Intake Port Velocities (@ 28 in.) ---
130 FPS at Intake Valve Curtain Area= 4.247 sq.in. at .650 Lift
163 FPS at Intake Valve OD Area and at Convergence Lift = .520
201 FPS 90% PerCent Rule Seat-Throat Velocity CSA= 2.752 sq.in.
--- 5000 RPM Intake Cross-sectional areas in Square Inches ---
350 FPS CSA= 1.580 Port has Sonic-Choke with HP Loss ( too fast FPS )
330 FPS CSA= 1.677 Port may have Sonic-Choke with HP Loss ( too fast FPS )
311 FPS CSA= 1.780 Highest useable Port velocity ( possible HP loss )
300 FPS CSA= 1.845 Smallest Port CSA ( Hi Velocity FPS • good TQ and HP )
285 FPS CSA= 1.942 Smallest Port CSA ( very good TQ and HP combination )
260 FPS CSA= 2.129 Recommended average Intake Port CSA (very good TQ and HP)
250 FPS CSA= 2.214 Largest recommended average Intake Port CSA ( good HP )
240 FPS CSA= 2.306 Largest recommended average Intake Port CSA (less Peak TQ)
235 FPS CSA= 2.355 Largest recommended Intake Port Gasket Entry area CSA
225 FPS CSA= 2.460 Largest Intake Port Gasket Entry CSA ( Slow FPS )
215 FPS CSA= 2.574 Possible Torque Loss with Reversion ( Slow FPS )
210 FPS CSA= 2.636 Torque Loss + Reversion possibility ( too slow FPS )
200 FPS CSA= 2.767 Torque Loss + Reversion possibility ( too slow FPS )
Note : these are calculated average Port cross-sectional areas and FPS

--- Cross-Sectional Areas at various Exhaust Port Velocities (@ 28 in.) ---
134 FPS at Exhaust Valve Curtain Area= 3.280 sq.in. at .600 Lift
185 FPS at Exhaust Valve OD Area and at Convergence Lift = .435
228 FPS 90% PerCent Rule Seat-Throat Velocity CSA= 1.926 sq.in. at 5000 RPM
--- 5000 RPM Exhaust Cross-sectional areas in Square Inches ---
435 FPS CSA= 1.011 Sonic Choke at Throat Area (too fast FPS velocity)
380 FPS CSA= 1.157 Sonic Choke at Throat Area (possibly too fast FPS)
350 FPS CSA= 1.255 Exhaust Port has Sonic-Choke with HP Loss (too fast)
330 FPS CSA= 1.333 Exhaust Port has Sonic-Choke with HP Loss (too fast)
311 FPS CSA= 1.414 smallest Exhaust Port ( very high velocity FPS )
300 FPS CSA= 1.466 smallest recommended Exhaust Port (Hi velocity)
285 FPS CSA= 1.543 smallest recommended Exhaust Port (Hi velocity)
265 FPS CSA= 1.660 Recommended average Exhaust Port CSA
250 FPS CSA= 1.759 Recommended average Exhaust Port gasket area
240 FPS CSA= 1.832 Recommended largest Exhaust Port gasket area
225 FPS CSA= 1.955 Largest Exhaust Port Exit gasket area (Slow FPS)
210 FPS CSA= 2.094 Largest Exhaust Port Exit gasket area (Slow FPS)
190 FPS CSA= 2.315 Torque Loss + Reversion + Scavenging loss (too slow FPS)
180 FPS CSA= 2.443 Torque Loss + Reversion + Scavenging loss (too slow FPS)
Note : these are calculated average Port cross-sectional areas and FPS







Cylinder Ignition Interval = 90 degrees 5000 RPM Hertz frequency = 41.7 Hz
Target EGT= 1316.1 degrees F at end of 4 second 600 RPM/Sec Dyno accel. test
466.868 CID Exhaust System operating RPM Range from 3000 to 5500 RPM

--- Single Primary Pipe Specs --- ( Low to Mid-Range RPM Torque and HP )
Diameter= 1.716 to 1.841 Total Length= 41.0 to 43.9 inches long
--- 2-Step Primary Pipe Specs --- ( Low to Mid-Range RPM Torque and HP )
1st Dia. inches= 1.716 Length= 20.5 to 22.0
2nd Dia. inches= 1.841 Length= 20.5 to 22.0
--- 3-Step Primary Pipe Specs --- ( Low to Mid-Range Torque and Hi RPM HP )
1st Dia. inches= 1.716 Length= 20.5 to 22.0
2nd Dia. inches= 1.841 Length= 10.3 to 11.0
3rd Dia. inches= 1.966 Length= 10.3 to 11.0

--- Single Primary Pipe Specs --- ( Mid-Range TQ to Higher RPM Horsepower )
Diameter= 1.916 to 2.041 Total Length= 41.0 to 43.9 inches long
--- 2-Step Primary Pipe Specs --- ( Mid-Range TQ to Higher RPM Horsepower )
1st Dia. inches= 1.916 Length= 13.7 to 15.1
2nd Dia. inches= 2.041 Length= 27.4 to 28.8
--- 3-Step Primary Pipe Specs --- ( Higher RPM Horsepower, possible TQ loss )
1st Dia. inches= 1.916 Length= 13.7 to 15.1
2nd Dia. inches= 2.041 Length= 13.7 to 14.4
3rd Dia. inches= 2.166 Length= 13.7 to 14.4

--- Conventional Straight Tube Collector Specs ---
( TQ ) Diameter= 3.183 to 3.433 Best Length= 22.7 and also 45.3 inches
( HP ) Diameter= 3.433 to 3.933 Best Length= 22.7 and also 11.3 inches
--- Megaphone Collector Specs ---( Diffuser or Diverging Cone Shape )---
( TQ ) Diameter= 2.433 taper to 3.433 Best Length= 22.7 or 45.3 inches
( HP ) Diameter= 2.683 taper to 3.683 Best Length= 22.7 or 45.3 inches
Best HP/TQ Tuned Collector Lengths= 22.7 , 45.3 , 90.6 , 181.2 inches long
Worst HP/TQ Loss Collector Lengths= 34.0 , 68.0 , 135.9 , 271.9 inches long

Note-> all Pipe Diameters are OD and based-off .0625 inch Pipe thickness

---- Primary Pipe's Harmonics ----
1st Harmonic = 177.2 inches long ... typically never used
2nd Harmonic = 67.8 inches long ... longest recommended
3rd Harmonic = 41.0 inches long ... highly recommended , best Torque Curve
4th Harmonic = 28.9 inches long ... shortest recommended
5th Harmonic = 22.0 inches long ... typically never used
6th Harmonic = 17.5 inches long ... typically never used
7th Harmonic = 14.4 inches long ... typically never used
8th Harmonic = 12.1 inches long ... typically never used

---- Collector's Harmonics (includes Intermediate, Muffler , TailPipe) ----
1st Harmonic = 181.2 inches long ... longest with Mufflers and TailPipes
2nd Harmonic = 90.6 inches long ... longest recommended with Mufflers
3rd Harmonic = 45.3 inches long ... more bottom-end Torque
4th Harmonic = 22.7 inches long ... highly recommended , best Torque Curve
5th Harmonic = 11.3 inches long ... reduced Torque , more top-end HP sometimes
6th Harmonic = 5.7 inches long ... reduced Torque , not recommended



Erland

[d-p]

STORT TACK !

Ska skriva ut och analysera all text / info

Kanske skulle lägga en byggtråd på bilen här, ( jag köpte den nyss )
Den ska liksom få en nystart, ska sortera ut / bort allt som är mindre bra

Den var faktiskt körd förra året , men det syns inte...