I am having a hard time finding any flow numbers for the different Cleveland heads. I am using a website someone posted here http://users.erols.com/srweiss/tablehdc.htmbut it does not differentiate between closed and open chamber 4V nor does it have complete numbers for 2V. Doany of you guyshave any info on Cleveland head flows? It appears I am having valve or lifer issues so I thought I would start doing my homework on heads. Thanks for the help.

 

These are an Iron 4v closed chamber with Parkers port inserts and epoxy.....

Intake Exhaust
Lift CFM CFM
0.500 297 173.9
0.550 312.5 181
0.600 317.7 188.2
0.650 326.9 192.8
0.700 334.9 194.5
0.750 344.8 198.3
0.800 349.0 203.7

Source: http://www.network54.com/Forum/11941...ad/1173548083/

I had some home ported 2V Aussies flow tested.
Here are the results if anyone cares.
I .200 128.8
E .200 98.6
I .300 183.0
E .300 134.7
I .350 196.5
E .350 150.1
I .400 199.0
E .400 165.7
I .450 203.1
E .450 177.0
I .500 205.5
E .500 189.3
I .550 207.0
E .550 196.5
I .600 207.7
E .600 208.5
I .650 207.0
E .650 216.2
I .700 206.9
E .700 220.4


Source: http://www.network54.com/Forum/11941...ad/1077667953/

Blue Thunder heads
Lift....Int....Ex w/o pipe....ex w/pipe

.2______141_______124____________129
.3______191_______165____________172
.4______236_______194____________200
.5______273_______213____________219
.55_____288_______219____________227
.6______302_______221____________231
.65_____313_______224____________233
.7______323_______227____________236
.75_____329_______229____________239

Source:
http://www.network54.com/Forum/11941...ad/1099870290/


These heads had a 4V exhaust valve installed and they are not much better than yours.

flow at 28" water, in CFM
Aussie 2V
int exh(1.71")

.050 45 38
.100 70 63
.150 98 85
.200 130 98
.250 161 112
.300 183 126
.350 195 140
.400 198 151
.500 206 166
.600 208 174
.700 209 171



Source http://www.network54.com/Forum/11941...ad/1071337200/


Head C302B
Lift Intake Exhaust
(inch) 2.19" 1.65"

0.100 81 73
0.200 157 131
0.300 223 180
0.400 266 210
0.500 306 223
0.600 331 228
0.650 --- 230
0.700 325.33 ---

Tested at 28" pressure drop on a SuperFlow 600 flow bench at Stiegemeyer

Source: http://www.network54.com/Forum/11941...ad/1144627378/

CHI 3v heads
That is where the individual flow numbers are, which happen to be:
----- I --- E
.1--- 70 -- 64
.2--- 147 - 114*
.3--- 201 - 153
.4--- 250 - 191
.5--- 286 - 208
.55-- 290 - 214
.6--- 290 - 222

Source: http://www.network54.com/Forum/11941...ad/1156568331/




Click and surf:
http://www.network54.com/Forum/11941...m=flow+testing

Have fun