Stage 3 CNC Ported Heads with 2.08" Valves
| Lift |
Stock Intake CFM |
CNC'd Intake CFM |
CFM Gained |
|
Stock Exhaust CFM |
CNC'd Exhaust CFM |
CFM Gained |
| .100 |
69.5 |
71.1 |
1.6 |
|
|
76.0 |
|
| .200 |
135.6 |
146.2 |
9.6 |
|
109.0 |
118.1 |
9.1 |
| .300 |
189.9 |
214.9 |
25.9 |
|
139.2 |
155.6 |
16.4 |
| .350 |
214.0 |
240.6 |
26.6 |
|
147.6 |
165.1 |
17.5 |
| .400 |
228.9 |
262.5 |
33.6 |
|
158.6 |
173.4 |
14.8 |
| .450 |
234.7 |
276.0 |
41.3 |
|
164.6 |
181.2 |
16.6 |
| .500 |
241.4 |
286.3 |
44.9 |
|
169.9 |
189.3 |
19.4 |
| .550 |
249.7 |
297.3 |
47.8 |
|
172.1 |
196.4 |
24.3 |
| .600 |
255.9 |
293.8 |
37.9 |
|
176.1 |
197.9 |
21.8 |
| .650 |
255.9 |
295.6 |
39.7 |
|
179.9 |
198.1 |
18.2 |
| .700 |
261.3 |
297.7 |
36.4 |
|
182.3 |
200.1 |
17.8 |
| .750 |
263.2 |
299.6 |
36.4 |
|
|
|
|
Edelbrock Small Block RPM Magnum
Hughes Super Prepped w/ 2.02" Valve
| Test |
Stock Intake |
Hughes Prepped Intake |
CFM Gained |
|
Stock Exhaust |
Hughes Prepped Exhaust |
CFM Gained |
| .100 |
69.3 |
72.7 |
+3.4 |
|
|
|
|
| .200 |
125.8 |
137.9 |
+12.1 |
|
82.1 |
82.1 |
0 |
| .300 |
182.5 |
188.5 |
+6.0 |
|
133.3 |
132.2 |
-1 |
| .350 |
206.4 |
212.9 |
+6.5 |
|
152.5 |
148.3 |
-4.1 |
| .400 |
228.3 |
235.1 |
+6.8 |
|
167.3 |
165.1 |
-2.2 |
| .450 |
243.9 |
257.0 |
+13.1 |
|
176.3 |
176.3 |
0 |
| .500 |
247.2 |
262.3 |
+15.1 |
|
184.0 |
185.1 |
+1.1 |
| .550 |
255.0 |
268.7 |
+13.7 |
|
189.3 |
190.3 |
+1.0 |
| .600 |
258.3 |
270.1 |
+11.8 |
|
192.5 |
195.6 |
+.61 |
| .650 |
259.0 |
272.0 |
+13.0 |
|
194.6 |
198.8 |
+4.2 |
| .700 |
259.6 |
274.3 |
+14.7 |
|
197.7 |
201.8 |
+4.1 |
Edelbrock Small Block RPM Magnum
Hughes Fully CNC Ported w/ 2.08" VALVE
| Test |
Stock Intake |
Hughes CNC Intake |
CFM Gained |
|
Stock Exhaust |
Hughes CNC Exhaust |
CFM Gained |
| .100 |
69.3 |
75 |
+5.7 |
|
|
62 |
|
| .200 |
125.8 |
158.1 |
+32.3 |
|
82.1 |
86.0 |
+3.9 |
| .300 |
182.5 |
214.3 |
+31.8 |
|
133.3 |
140.4 |
+7.1 |
| .350 |
206.4 |
240.6 |
+34.2 |
|
152.5 |
161.6 |
+9.1 |
| .400 |
228.3 |
264.3 |
+36.0 |
|
167.3 |
181.2 |
+13.9 |
| .450 |
243.9 |
282.9 |
+39.0 |
|
176.3 |
198.9 |
+22.6 |
| .500 |
247.2 |
292.5 |
+45.3 |
|
184.0 |
210.3 |
+26.3 |
| .550 |
255.0 |
297.3 |
+42.3 |
|
189.3 |
219.5 |
+30.2 |
| .600 |
258.3 |
299.1 |
+40.8 |
|
192.5 |
226.1 |
+33.6 |
| .650 |
259.0 |
298.9 |
+39.9 |
|
194.6 |
230.4 |
+35.8 |
| .700 |
259.6 |
304.0 |
+44.4 |
|
197.7 |
233.6 |
+35.9 |
|
Lift
|
2.14" OEM Inrtake
|
CNC Stage3 Intake
|
Gain
|
|
OEM
|
CNC Stage3 Exhaust
|
Gain
|
|
.100"
|
74
|
79
|
+5
|
|
|
|
|
|
.200"
|
147
|
158
|
+11
|
|
98
|
103
|
+5
|
|
.300"
|
209
|
224
|
+15
|
|
138
|
138
|
+7
|
|
.400"
|
247
|
273
|
+26
|
|
167
|
183
|
+16
|
|
.500"
|
268
|
298
|
+30
|
|
188
|
206
|
+18
|
|
.600"
|
275
|
311
|
+36
|
|
203
|
223
|
+20 |
|
.700"
|
278
|
317
|
+39
|
|
214
|
234
|
+20
|
Vol: 230 CC 76cc
BB Edelbrock Victor Stage 3 CNC w/ 2.200" valve
440 Port Size
Port Volume: INT 313cc EXH 84cc
| Lift |
Stock Intake CFM |
CNC'd Intake CFM |
CFM Gained |
Stock Intake 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 |
BB Edelbrock Victor Stage 3 CNC 2.200" Intake valve
Max Wedge Port Size
| Lift |
Stock Intake CFM |
CNC'd Intake CFM |
CFM Gained |
Stock Intake CFM |
CNC'd Exhaust CFM |
CFM Gained |
| .100 |
74.4 |
79 |
5 |
|
|
|
| .200 |
137.0
|
171 |
34 |
99.4 |
101.0 |
1.6 |
| .300 |
191.7 |
235 |
43 |
158.1 |
165.1 |
7.0 |
| .350 |
220.1 |
268 |
48 |
180.8 |
193.5 |
12.7 |
| .400 |
247.8 |
293 |
45 |
198.8 |
217.4 |
18.6 |
| .450 |
273.9 |
317 |
43 |
215.3 |
234.2 |
18.9 |
| .500 |
293.8 |
327 |
33 |
224.9 |
248.6 |
23.7 |
| .550 |
309.5 |
341 |
31 |
230.9 |
260.3 |
29.4 |
| .600 |
310.7 |
352 |
42 |
235.9 |
271.5 |
35.6 |
| .650 |
311.0 |
364 |
53 |
239.0 |
278.8 |
39.8 |
| .700 |
316.4 |
372 |
56 |
240.7 |
284.6 |
43.9 |
| .750 |
318.6 |
379 |
60 |
241.9 |
288.5 |
46.6 |
INDY EZ 440 Port Size
with Hughes Super Prep work
| Test |
Stock Indy Intake Port |
Intake Port with Super Prep |
CFM Gained |
|
Stock Indy Exhaust Port |
Exhaust Port with Super Prep |
CFM Gained |
| .100 |
70 |
71 |
+1 |
|
59 |
61 |
+2 |
| .200 |
128 |
153 |
+25 |
|
101 |
106 |
+5 |
| .300 |
188 |
209 |
+21 |
|
138 |
145 |
+7 |
| .350 |
215 |
231 |
+16 |
|
153 |
160 |
+7 |
| .400 |
236 |
258 |
+22 |
|
168 |
179 |
+11 |
| .450 |
261 |
277 |
+16 |
|
182 |
191 |
+9 |
| .500 |
276 |
293 |
+17 |
|
196 |
203 |
+7 |
| .550 |
287 |
308 |
+21 |
|
212 |
216 |
+4 |
| .600 |
294 |
319 |
+25 |
|
217 |
223 |
+6 |
| .650 |
299 |
325 |
+26 |
|
224 |
230 |
+6 |
| .700 |
303 |
329 |
+26 |
|
230 |
234 |
+6 |
| |
|
|
|
|
|
|
|
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.
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 |
Stealth-ported" S/B oval track heads
'596 casting number OEM valves 1.88-1.60
|
|
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.
Magnum or "Iron Ram" style heads
The chart below is a flowchart comparing the Iron ram
head to the OEM head and the R/T head
INTAKE EXHAUST
| |
|
|
|
|
|
|
|
|
|
| Valve Lift |
Magnum OEM
|
Iron Ram |
Iron Ram |
R/T |
LA '576 |
Magnum OEM |
Iron Ram |
R/T |
LA '576 |
| |
1.920" |
1.920" |
2.02" |
2.02" |
2.02" |
1.620" |
1.620" |
1.620" |
1.60" |
| .100 |
51.2 |
68.2 |
n/a |
61.4 |
69.0 |
55.1 |
57.2 |
65.9 |
51.0 |
| .200" |
121.1 |
124.1 |
119.0 |
119.2 |
118.0 |
109.0 |
114.1 |
120.2 |
103.0 |
| .300" |
181.5 |
179.6 |
177.0 |
169.3 |
176.0 |
148.4 |
155.3 |
153.7 |
131.0 |
| .400" |
207.5 |
213.8 |
224.0 |
211.0 |
204.0 |
170.8 |
180.0 |
168.0 |
140.0 |
| .500" |
209.0 |
227.0 |
247.0 |
220.6 |
212.0 |
176.2 |
187.3 |
174.0 |
141.0 |
| .600" |
208.4 |
233.1 |
240.0 |
220.6 |
210.0 |
178.4 |
188.7 |
176.0 |
142.0 |
Magnum "Iron Ram" Super Prepped Heads
| Lift |
CFM @ 28" correction |
| .100" |
70.5 |
| .200" |
140.7 |
| .300" |
202.1 |
| .350" |
223.7 |
| .400" |
239.0 |
| .450" |
258.2 |
| .500" |
268.0 |
| .550" |
264.4 |
| .600" |
250.4 |
| .650" |
245.0 |
Magnum "Iron Ram" Fully Ported Heads
| Lift |
CFM @ 28" correction |
| .100" |
67 |
| .200" |
127 |
| .300" |
187 |
| .350" |
220 |
| .400" |
241 |
| .450" |
268 |
| .500" |
285 |
| .550" |
296 |
| .600" |
298 |
| .650" |
299 |
RHS "X" Heads
(LA & Magnum heads use the same ports)
Stock with 1.92" int and 1.60" Exhaust
| Lift |
intake |
Exhaust |
| .100" |
66 |
|
| .200" |
116 |
91 |
| .300" |
177 |
138 |
| .350" |
203 |
155 |
| .400" |
224 |
167 |
| .450" |
239 |
171 |
| .500" |
252 |
174 |
| .550" |
262 |
176 |
| .600" |
263 |
178 |
| .650" |
263 |
179 |
| .700" |
275 |
179 |
Note: These are average numbers.
Stock ports can vary by +/- 6 cfm in the same head.
RHS "X" Heads with Hughes Super Prep work
Uses 2.02" intake and stock exhasut valves
| 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 |
| |
|
|
|
|
|
|
|