#1---Head Flow Charts & Comparisons

8/23/2014


        There are enough flow numbers on our website to keep everyone busy for a while. The numbers are from our in-house flow bench. We now have a SAENZ model 680 flow bench which we all enjoy using. It has all the bells and whistles and even gives us information that we didn't even ask for. It automatically corrects for atmospheric conditions. It is cool! All tests were done at 28".  

Now your next question is........
What will they flow on my bench?
The answer is that we don't know. That is why we supply these before and after charts and again, all flow benches do not flow the same! Benches can show a difference of about 3to 5%.
5% at 300CFM is a difference of 15CFM. We have seen benches off 6 to 8 %.
8% at 300CFM is 24CFM. An extra 24CFM will really help a guy sell heads! How does this make you feel? I know, you feel cheated, so do we, but this is what we have to deal with in this business.
  So how do you go about determining a good port? After 70 years of flowing heads the industry still does not have a good answer to this. Here are some indicators to help.

  1. Know this for sure. If most legitimate shops are getting 350CFM airflow out of a certain head and someone suddenly starts advertising 390CFM...... that is just what it is, advertising (or a mis-used flow bench)

  2. Clue to a good port. The flow should rise very quickly. For example: Lets take a head that flows a maximum of 300CFM. The  lower the lift at which that number is reached, the better the port design. If maximum flow is reached at .500" lift the head will produce a better power curve than if the valve must be opened to .700" lift or more to get the flow.  A head that flows good quickly is what we call our "Fat Flow" ports.

  3. If the flow continues to increase above your maximum lift the port volume is too big and the port is poorly designed and will therefore have a lower velocity and poor power output.

 4. The port with the most flow quickly reached is the best designed port.  The port volume is very dependent on the application, displacement, cam etc.... As the displacement and RPM rise, the port volume will need , generally, to increase as well. As a point of interest.... it is almost impossible to make a port to big on a Mopar wedge engine.

 5. The flow numbers above about 90/95% of your net lift do a lot more for your ego than they do for your power curve......But, they look good in ads.

 6. Flow numbers by themselves are a poor way to judge a head. Important power producing features like velocity and wet flow cannot be seen in flow numbers. Our SAENZ flowbench will show average airflow over a specific lift range similar to the average horsepower and torque shown on an engine dyno test sheet. After looking at flow averages within the lift of the cam that will be used, it becomes apparant that this can be a very handy tool for choosing cylinder heads. Going a step further, we look at the average flow from about .150" lift to .050" less than max lift. this is the most important lift areas related to power production. This average flow versus the original average at the same lift area gives a very graphic answer to how the porting will actually benefit your engine. So, expect to see average flow results along with the standard flow numbers.

 7. Keep in mind that we are constantly working on head development and these numbers can change. We spend part of every week doing R&D on head porting and design all year long.   

 
 8. The charts below show the difference between stock flow numbers as well as the flow after our modifications are made. But there can be probelms here too. For example, we have seen as much as 15-20 cfm difference in stock heads that have the same part numbers. So, our "stock flow" is an example of stock flow. The actual gain in flow is much more important than what the flow "number" is. 
 
  9. Cross-sectional Area: The cross-sectional area has to do with how much the port shape and size changes from the gasket surface to the short turn in the intake port (for the most part). You want as little change in cross-section as possible. When the port walls diviate from a straight path due to pushrod, head bolt etc... location, this effects the flow and fuel atomization in a negative way. You can't tell this with flow numbers but an eyeball check comparing several differant ports will give you a good idea of what to look for.
 
10.   Super Prepped Heads have a propietary valve job, deep bowl blending and a deep port match at the port mouth. These modifications will increase airflow up to .450"-.500" lift. To gain flow above that point, the entire port will need to be reworked (which will in turn help the low and mid-lify flow number too. Note the flow on our fully CNC ported heads).
     CNC Super Prepped Heads are heads include all of the same work that a Super Prepped head has as well as having the combustion chambers (only) CNC machined to improve flow and wet flow qualities. These heads will show tremendous gains up to .450"-.500" lift. Note that some head designs do not respond to CNC machined chambers and we do not offer them.
11.   CNC Ported Heads.  These heads are fully CNC ported and have our priority racing valve job.  In some cases, we may offer 2 different CNC ported versions such as our Stage 3 ported LA or magnum Edelbrock heads.  In cases like this, one is a special such as the offset pushrod large port version, and the other is a fully CNC'd head without the offset pushrod.  The one with the offset pushrod costs more money, but it will make more power.
12.  Iron Heads.  We do not currently offer any CNC ported iron heads.  We do in some cases offer hand ported iron heads.
 
 

You may notice as you wander around our website that from time to time there may be flow charts of the same head on two different pages. The "Stock" flow numbers may not be exactly the same on each page. This is not a mistake. We actually do the stock flow test on the head that we are going to port. Stock flow numbers routinely vary from head to head and port to port so it is inevitable that the numbers will vary a little.
 
Note: These are average numbers.
Stock ports can vary by +/- 8 cfm in the same head.

 


 Aluminum Heads(Iron heads at bottom of page)
 
Small Block Edelbrock Victor Heads
 
Flow test shows results from out SAENZ Flow Bench
Lift Intake Exhaust
.050 39.3 29.7
.100 75.8 57.4
.150 116.1 84.8
.200 167.4 115.5
.250 207.6 134.5
.300 238.5 154.1
.350 267.5 170.9
.400 296.2 187.0
.450 320.9 201.7
.500 339.3 212.3
.550 348.5 221.4
.600 357.3 227.7
.650 362.4 233.6
.700 366.7 238.6
.750 371.1 243.1
.800 371.3 246.7
     
 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Small Block Edelbrock RPM "LA" Heads 
                   Edelbrock 60779
 
 
                   Small Block "LA" Edelbrock Heads
                        Super Prepped (Hand Work)
                                   
# HUG60779
Flow tests below show results from our SAENZ 680 Flow Bench
Test Stock Int cfm Super Prep Int cfm Int cfm Gains   Stock Exh cfm Super Prep Exh cfm

Exh cfm Gains

.100" 67.6 71.6 +4        
.200" 128.0 138.5 +10.5   84.4 92.9 +8.5
.300" 185.2 192.6 +7.4   129.8 137.6 +7.8
.350" 208.1 215.7 +7.6   142.6 153.9 +11.3
.400" 227.1 235.8 +8.7   151.2 168.5 +17.3
.450" 240.4 253.5 +13.1   157.2 175.2 +18
.500" 253.7 254.9 +1.2   161.3 176.3 +15
.550" 256.4 257.9 +1.5   163.3 176.3 +13
.600" 257.7 259.0 +1.3   164.2 176.3 +12.1
.650" 251.7 252.6 +0.9   164.9 176.3  +11.4
 

 

                        Small Block "LA" Edelbrock Heads
              
   C.N.C. Super Prepped (C.N.C. & Hand Work)
                                     
  #HUG60779-SCP
Flow tests below show results from our SAENZ 680 Flow Bench

Test Stock Int cfm CNC Prep Int cfm Int cfm Gains   Stock Exh cfm CNC Prep Exh cfm

Exh cfm Gains

.100" 67.6 72.1 +4.5        
.200" 128.0 150.4 +22.5   84.4 87.8 +3.4
.300" 185.2 209.5 +24.3   129.8 136.5 +6.7
.350" 208.1 231.3 +23.2   142.6 153.0 +10.4
.400" 227.1 248.5 +21.4   151.2 169.1 +17.9
.450" 240.4 257.0 +16.6   157.2 178.4 +21.2
.500" 253.7 254.1 +0.7   161.3 184.2 +22.9
.550" 256.4 257.3 +0.9   163.3 186.6 +23.3
.600" 257.7 257.9 +.02   164.2 188.7 +24.5
.650" 251.7 252.1 +0.4   164.9 189.8  +24.9
 

                     
 
                          Small Block "LA" Edelbrock Heads (rev 8.14)
                                    Intake Port Volume 189cc
                  Fully C.N.C. Ported with 2.08" Intake Valves
                                           # HUG60779-S3   
Flow tests below show results from our SAENZ 680 Flow Bench
   

Lift Stock Intake CFM CNC'd Intake CFM CFM Gained   Stock Exhaust CFM
w/ pipe
CNC'd Exhaust CFM
w/pipe
CFM Gained
.100 71.0 72.0 1.0    55.0 70.0 15.0
.200 138.0 149.0 11.0   113.0 123.0 10.0
.300 188.0 221.0 33.0   150.0 156.0 6.0
.350 213.0 245.0 32.0   162.0 173.0 9.0
.400 230.0 266.0 36.0   176.0 185.0 9.0
.450 236.0 285.0 49.0   185.0 197.0 12.0
.500 240.0 296.0 56.0   189.0 206.0 7.0
.550 249.0 301.0 52.0   195.0 214.0 19.0
.600 251.0 303.0 52.0   196.0 218.0 22.0
.650 250.0 304.0 54.0   197.0 223.0 26.0
.700 254.0 305.0 51.0   198.0 226.0 28.0
.750 259.0 305.0 46.0    200.0 228.0    28.0

 


 

                  Small Block "LA" Edelbrock Heads (rev 8.14)
                      Intake Port Volume 225cc
               Fully C.N.C. Ported with 2.08" Intake Valves
                           # HUG60779BIGMOUTH
Flow tests below show results from our SAENZ 680 Flow Bench
Lift Stock Intake CFM CNC'd Intake CFM CFM Gained   Stock Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 69.5 77.4 +7.9    56  70  14
.200 135.6 168.1 +32.5   114 123 9
.300 189.9 236.4 +46.5   150 156  6
.350 214.0 262.1 +48.1   165  173  8
.400 228.9 279.0 +50.1   176 185 9
.450 234.7 292.4 +57.7   185 197 12
.500 241.4 304.8 +63.4   191  206  15
.550 249.7 308.4 +58.7   196  214  18
.600 255.9 312.3 +56.4   199 218 19
.650 255.9 316.2 +60.3   202 223  21
.700 261.3 319.9 +58.6   204  226 22






Small Block Edelbrock Victor Heads
 

 Lift  Intake  Exhaust
 .050  39.3  29.7
 .100  75.8  57.4
 .150  116.1  84.8
 .200  167.4  115.5
 .250  207.6  134.5
 .300  238.5  154.1
 .350  267.5  170.9
 .400  296.2  187.0
 .450  320.9  201.7
 .500  339.3  212.3
 .550  348.5  221.4
 .600  357.3  227.7
 .650  362.4  233.6
 .700   366.7  238.6
 .750  371.1  243.1
 .800  371.3  246.7







 Small Block Edelbrock RPM Magnum Heads 
            Edelbrock 61779


            Edelbrock Small Block RPM Magnum 
                 Super Prepped  (Hand Work) 
                            # HUG61779-P


Flow Charts for the Magnum Edelbrock are currently being revised and will be reposted as soon as possible.


              Edelbrock Small Block RPM Magnum 
               
 C.N.C. Super Prepped  (C.N.C. & Hand Work) 
                            # HUG61779-SCP

          Dave says, "This is a very good Bang for the buck head".

Flow tests below show results from our SAENZ 680 Flow Bench
Lift Stock Intake CFM CNC'd Intake CFM CFM Gained   Stock Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 67.6 71.6 +4.0        
.200 125.0 149.0 +24.0   78.1 120.0 +41.9
.300 180.9 209.8 +28.9   132.9 157.5 +24.9
.350 204.1 234.3 +30.0   147.0 172.6 +25.6
.400 223.9 251.2 +27.3   167.8 185.9 +18.1
.450 236.2 261.4 +25.2   170.2 197.4 +27.2
.500 247.9 253.1 +5.2   180.1 205.3 +25.2
.550 247.8 253.5 +5.7   187.9 210.6 +25.2
.600 245.6 256.1 +10.5   192.1 216.4 +22.7
.650 245.5 260.0 +14.5   196.7 219.9 +23.2
 



 

                   Edelbrock Small Block RPM Magnum 
              Fully C.N.C Ported with 2.08" intake valves
                                # 61779BIGMOUTH
Flow tests below show results from our SAENZ 680 Flow Bench
Lift Stock Intake CFM CNC'd Intake CFM CFM Gained   Stock Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 67.6 73.4 +5.8        
.200 125.0 149.7 +24.7   78.1 114.1 +36
.300 180.9 226.6 +45.7   132.9 154.5 +21.6
.350 204.1 257.5 +53.4   147.0 172.6 +25.6
.400 223.9 282.1 +58.2   167.8 185.3 +22.5
.450 236.2 303.8 +67.7   170.2 194.7 +24.5
.500 247.9 314.1 +66.2   180.1 201.0 +20.9
.550 247.8 323.6 +75.8   187.9 206.2 +18.3
.600 245.6 326.9 +81.3   192.1 210.9 +18.8
.650 245.5 331.1 +85.6   196.7 214.0 +17.3







GEN 3 Hemi Heads
 


5.7 Hemi Airflow @ 28”


Flow tests below show results from our SAENZ 680 Flow Bench

Lift

Stock
Intake

CNC'd Intake Gain

Stock
Exhaust

CNC'd Exhaust Gain
.100 69 81 +12   74  
.200 150 164 +14 112 113 +1
.300 215 236 +21 144 156 +12
.350 239 264 +25 151 180 +29
.400 251 289 +38 160 199 +39
.450 259 308 +49 163 218 +45
.500 261 325 +64 164 232 +68
.550 261 335 +74 164 241 +77
.600 263 342 +79 165 249 +84
.650 264 347 +83 166 253 +88
 
valves (2.100” int, 1.575” exh) 5.7 Heads
85.4cc comb chambers
As you can see, these are extreme flow heads. We have used them on a 740 HP, 392" engine running pump gas.
 

 

      


 Big Block Edelbrock RPM Heads 
          Edelbrock 60929 

 

 

                        84cc Edelbrock Big Block RPM & E-Street
                       Prepped (Hand Work)
                                #60929-P & 5093-P

Flow tests below show results from our SAENZ 680 Flow Bench

Test Stock Intake CFM Prepped Intake CFM CFM Gained   Stock Exhaust CFM Prepped Exhaust CFM CFM Gained
.100" 74.0 75.1 +1   67.9 75.8 +8
.200" 147 152.3 +6   117.2 132.2 +17
.300" 209 225 +14   149.4 166.1 +17
.350" 230 239.0 +12   167.0 183.9 +16
.400" 247 264.8 +18   179.0 199.1 +20
.450" 256 275.6 +19   190.6 209.8 +19
.500" 268 284.0 +16   202.3 221.0 +19
.550" 281.4 285.6 +4   213.1 231.2 +18
.600" 282.0 286.0 +4   220.9 238.8 +18
.650" 280.0 285.6 +5   225.9 247.5 +22
               

 


                                75cc Edelbrock Big Block RPM & E-Street
                     C.N.C. Super Prepped (C.N.C. & Hand Work)
                                  # HUG60829-SCP & HUG5090-SCP


                           

     Flow tests below show results from our SAENZ 680 Flow Bench

Test Stock Intake CFM Prepped Intake CFM CFM Gained   Stock Exhaust CFM Prepped Exhaust CFM CFM Gained
.100"   77.3       75.3  
.200"   153.8       127.9  
.300"   219.9       171.2  
.350"   245.9       189.7  
.400"   265.2       207.7  
.450"   279.1       221.5  
.500"   289.0       232.7  
.550"   297.8       242.5  
.600"   303.6       249.4  
.650"   305.4       254.9  
 .700    305.1       259.6  

 
                   Edelbrock 84cc Big Block RPM 
                                  Fully C.N.C. Ported
                                      #60929-S3
       
Flow tests below show results from our SAENZ 680 Flow Bench               
 

Lift

2.14" OEM Intake

CNC Stage3 Intake

Gain

 

OEM

CNC Stage3 Exhaust

Gain

.100"

74

79.5

+5.5

 

 

 

 

.200"

147

162.4

+15.4

 

117

124.3

+7.3

.300"

209

229.1

+20.1

 

 149

158.1

+9.1

.400"

247

281.1

+34.1

 

 179

 186.4

 +7.4

.500"

268

308.2

+40.2

 

 203

 205.3

 +2.3

.600"

275

327.8

+52.8

 

 217

 216.5

 -.5

.700"

278

334.8

+56.8

 

 222

 224.1

+2.1


          Edelbrock 75cc Big Block RPM & E-Street (rev 9.14)
                              Fully C.N.C. Ported (Big Port)
                        Part # 60829-S3 & 5090-S3
Flow tests below show results from our SAENZ 680 Flow Bench

Lift

2.14" OEM Intake

CNC Stage3 Intake

Gain

 

OEM

CNC Stage3 Exhaust

Gain

.100"

67

76

+9

 

59

77

+18

.200"

125

163

+38

 

106

121

+15

.300"

188

232

+44

 

145

155

+10

.400"

238

281

+43

 

174

180

+6

.500"

272

314

+42

 

197

197

 

.600"

280

336

+56

 

208

209

+1

.700"

291

343

+52

 

 219

 219

 


            


             Big Block Edelbrock Victor Heads
             Standard 440 Size Intake Ports 
            Hughes 4656 / Edelbrock 77929
  
          


 
                   Edelbrock Big Block Victor (440 Port Size) 
                             Super Prepped (Hand Work)
                                         # HUG4656-P
    
                      
    


                 Edelbrock Big Block Victor (440 Port Size) 
         
      C.N.C.Super Prepped (C.N.C. & Hand Work)
                                    # HUG4656-SCP
   
 
 

                                   


                      Edelbrock Big Block Victor (440 Port Size) 
                                      Fully C.N.C. Ported
                                         # HUG4656-S3
 
                         

Port Volume: INT 313cc EXH 84cc

Flow tests below show results from our SAENZ 680 Flow Bench
Lift Stock Intake CFM CNC'd Intake CFM CFM Gained Stock  Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 74.4 81.2 6.8      
.200

137.0

170.9 33.9 99.4 101.0 1.6
.300 191.7 235.1 43.4 158.1 165.1 7.0
.350 220.1 267.8 47.7 180.8 193.5 12.7
.400 247.8 290.4 42.6 198.8 217.4 18.6
.450 273.9 313.0 39.1 215.3 234.2 18.9
.500 293.8 320.3 26.5 224.9 248.6 23.7
.550 309.5 331.9 22.4 230.9 260.3 29.4
.600 310.7 342.0 31.3 235.9 271.5 35.6
.650 311.0 349.6 38.6 239.0 278.8 39.8
.700 316.4 354.7 38.3 240.7 284.6 43.9
.750 318.6 356.3 37.7 241.9 288.5 46.6
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 

 

 

 

 

 
 
          Big Block Edelbrock Victor Heads
             Max Wedge Size Intake Ports 
            Hughes 4658 / Edelbrock 77949
 
                 Edelbrock Big Block Victor (Max WedgePort Size) 
                      
       Super Prepped (Hand Work)
                                         # HUG4658-P
                                   


             Edelbrock Big Block Victor (Max WedgePort Size) 
                  
 C.N.C.Super Prepped (C.N.C. & Hand Work)
                                      # HUG4658-SCP
                                   
 

 
                    Edelbrock Big Block Victor 
                   (Monster (Max) Wedge Port Size) 
                             Fully C.N.C. Ported 
                               # HUG77949-S3
 

                  355cc int port vol
Flow tests below show results from our SAENZ 680 Flow Bench

Lift Stock Intake CFM CNC'd Intake CFM CFM Gained Stock Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 74.4 79 5      
.200

137.0

164 30 99.4 121.0 21.6
.300 191.7 245 43.3 158.1 166.0 7.9
.350 220.1 270 47.9 180.8 193.5 12.7
.400 247.8 300 45.2 198.8 202.0 3.2
.450 273.9 328 43.1 215.3 230.2 14.9
.500 293.8 351 53.2 224.9 232.0 7.1
.550 309.5 366 45.5 230.9 240.3 9.4
.600 310.7 380 65.3 235.9 255.0 19.1
.650 311.0 391 73.0 239.0 260.8 21.8
.700 316.4 397 79.6 240.7 267.0 26.3
.750 318.6 397 60.4 241.9 270.5 28.6
.800 322.0 406 86 244.0 273.0 29.0

 

  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 


Edelbrock Victor Jr. CNC Cylinder Heads For Chrysler HEMI®
                  Super Prepped
Combustion Chamber volume 170cc
Intake runner volume 245cc
Exhaust runner volume 105cc
Intake valve diameter 2.32"
Exhaust valve diameter 1.94"

Flow tests below show results from our SAENZ 680 Flow Bench with a pipe.
Lift Intake
Stock
Int Super Prepped   Exhaust Stock Exh Super Prepped
.050 40.4 52.3 (+12)   35.7 35.3
.100 76.8 87.7 (+11)   70.0 72.9 (+3)
.150 111.5 128.2 (+17)   110.8 117.0 (+6)
.200 148.7 168.9 (+20)   151.2 151.0
.250 188.1 213.4 (+25)   179.2 181.0 (+1)
.300 226.7 258.5 (+32)   207.3 202.8 (-5)
.350 265.0 298.2 (+33)   229.5 223.8 (-6)
.400 303.9 338.2 (+35)   249.8 246.9 (-3)
.450 340.9 372.4 (+32)   266.4 269.7 (+3)
.500 372.6 399.0 (+27)   279.9 291.4 (+12)
.550 398.9 420.1 (+22)   286.6 307.5 (+21)
.600 413.8 433.0 (+20)   290.0 320.0 (+30)
.650 421.8 439.2 (+18)   290.5 328.8 (+38)
.700 429.9 442.8 (+13)   291.3 333.5 (+41)
 .750   443.7      
.800   446.4      
Average        209.9 234.6
 
   INDY Cylinder Heads 440 EZ
(Standard 440 Intake Port Size)
   HUG4950/ IND440-H1-SEZ-1
 

  


INDY Big Block440-EZ (Standard 440 Port Size) 
            
CNC Super Prepped
 
Flow tests below show results from our SAENZ 680 Flow Bench                 

 

Test Stock Indy Intake Port Intake Port with CNC Super Prep CFM Gained      Stock Indy Exhaust Port Exhaust Port with CNC Super Prep CFM Gained
.100 74.4 80.7 +6.3   59.7 70.4 +10.7
.150 106.6 120.4 +13.5   79.1 96.6 +17.5
.200 136.7 154.0 +17.3   97.5 117.4 +19.9
.250 168.9 186.8 +17.9   116.0 136.8 +20.8
.300 196.5 218.1 +21.6   134.0 153.9 +19.6
.350 223.4 248.5 +25.1   152.1 169.6 +17.5
.400 247.9 274.9 +27.0   167.9 183.0 +15.1
.450 267.1 295.1 +28.0   182.9 196.0 +13.1
.500 284.1 313.6 +29.5   196.3 207.1 +10.8
.550 295.6 322.6 +27.0   205.5 215.4 +19.9
.600 295.9 332.1 +36.0   215.0 221.7 +6.7
.650
 298.8  332.9  +34.1    219.6  227.1  +7.5
.700 304.4 336.3 +31.9   223.5 230.7 +7.2
AVG 210.1 232.7     148.8 161.7  


   INDY Cylinder Heads 440 EZ
  (Max Wedge Intake Port Size)
             HUG4950MW

  

       INDY Big Block440-EZ (Max Wedge Port Size) 
               
 
Fully CNC Ported
               # HUG 4950-MW-S3
          Use the chart below to view flow numbers.              

    Flow Comparisons Between the
 INDY EZ-295 vs. Hughes C.N.C's INDY EZ's 

This chart is to show the difference in INDY EZ MaxWedge CNC vs. Hughes Max Wedge CNC on the same head. 

Flow tests below show results from our SAENZ 680 Flow Bench
 
 Intake Port Volumes          Exhaust Port Volumes
  INDY      Hughes                   INDY        Hughes
   318         298                           81                79
 
 
Test Indy Intake Hughes Intake Gain in CFM   Indy Exhaust Hughes Exhaust Gain in CFM
.100" 72 77 +5        
.200" 146 159 +12   91 88 -3
.300" 215 231 +16   136 135 -1
.350" 247 264 +17   155 155 0
.400" 276 283 +7   174 177 +3
.450" 297 304 +7   191 197 +6
.500" 315 323 +8   203 218 +15
.550" 331 339 +7   218 230 +12
.600" 341 345 +4   227 241 +14
.650" 349 352 +3   235 248 +13
.700" 351 352 +1   241 252 +11
 
 

 Iron Heads

  
     Magnum EQ or "Iron Ram" style heads
                  INDY LAX & MAX
             

  The chart below is a flowchart comparing the Iron ram
  head & the INDY Iron heads to the OEM head and the R/T head
 (updated 08/08/12) 
Flow tests below show results from our SAENZ 680 Flow Bench

 

                     INTAKE                                                               EXHAUST

                               
Valve Lift Magnum OEM LAX/Iron Ram LAX/Iron Ram LAX/Iron Ram R/T LA '576   Magnum OEM LAX/Iron Ram R/T LA '576 LAX /Iron Ram
  1.920" 1.920" 2.02" Super Prepped 2.02" 2.02"   1.620" 1.620" 1.620" 1.60" Super Prepped
.100" 51 58 70 73 61 69   55 59 65 51 56
.200" 121 109 121 140 119 118   109 108 120 103 110
.300" 181 168 174 194 169 176   148 145 153 131 149
.400" 207 212 221 227 211 204   170 165 168 140 174
.500" 209 236 245 260 220 212   176 177 174 141 187
.600" 208 239 254 267 220 210   178 183 176 142 182
             
 
 
  
  

 

Magnum "Iron Ram" 
     & INDY LAX/MAX  
Super Prepped Heads (2.02" int)
   (updated 08/08/12)      

Flow tests below show results from our SAENZ 680 Flow Bench    

 
Lift IntakeFlow   Exhaust Flow Exh % of Int
.050" 5.1      
.100" 72   56 78%
.150" 106   85 80%
.200" 140   111 79%
.250" 172   130 76%
.300" 194   149 77%
.350" 218   165 76%
.400" 236   173 73%
.450" 253   183 72%
.500" 261   187 72%
.550" 266   187 70%
.600" 267   186 70%
 
 
 

 

 

 RHS "X" Head 
Small Block "LA" & Magnum Style

HUG20300 & 20301
 

    

          RHS   "X" Heads
  (LA & Magnum heads use the same ports)
   Stock with 1.92" int and 1.60" Exhaust
 (updated 08/08/12)

Flow tests below show results from our SAENZ 680 Flow Bench

Lift intake Exhaust
.100" 58  
.200" 109 105
.300" 168 129
.350" 194 153
.400" 213 166
.450" 225 174
.500" 236 182
.550" 240 182
.600" 239 182
     
     

 Note: These are average numbers.
Stock ports can vary by +/- 6 cfm in the same head.

 


                  RHS "X" Heads 
         Super Prepped (Hand Work)
 Uses 2.02" intake and stock exhasut valves

Flow tests below show results from our SAENZ 680 Flow Bench

Lift Stock Super Prepped CFM Change   Stock Super Prepped Change
.100 66 74 +8        
.200 116 146 +40   91 89 -2
.300 177 202 +25   138 139 +1
.350 203 225 +22   155 158 +3
.400 224 241 +17   167 173 +6
.450 239 258 +19   171 181 +10
.500 252 268 +16   174 187 +13
.550 262 271 +9   176 196 +15
               

  

  Big Block OEM Iron Heads

 

 

     Big Block Iron '452 
    Stage 3 Fully Ported
Flow tests below show results from our SAENZ 680 Flow Bench   

Lift Ported Intake cfm   Ported Exhaust cfm
.100 75.8    
.200 155.0   76.4
.300 213.9   125.4
.350 227.3   142.9
.400 243.4   162.3
.450 258.4   177.4
.500 269.4   190.3
.550 278.5   199.8
.600 286.0   205.9
.650 289.4   211.1
.700 291.3   211.1

 
 
 
 
  
 
Undercover "Stealth" Porting
Small Block "LA" Iron Heads
 

         Stealth-ported" S/B Oval Track Heads
      '596 casting number OEM valves 1.88-1.60
              Stealth Valves 2.02-1.60

Flow tests below show results from our SAENZ 680 Flow Bench
 

 

OEM Stealth CFM   OEM Stealth CFM
  INT INT Change      Exh Exh Change
.100" 66 71 +5   51 80 +29
.200" 89 144 +55   103 124 +21
.300"   136 192 +56   131 149 +18
.350"   176 211 +35   136 156 +20
.400" 184 226 +42   140 160 +20
.450" 186 231 +45   142 168 +26
.500" 184 223 +39   141 168 +27
.550" 183 218 +35   142 168 +26

 Note: These flow figures are representative of improvements
 that can be made with stealth porting on LA heads.
Actual flow will vary with different casting numbers.

 

 

 

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