Collective Head Flow Numbers Table
#1
Collective Head Flow Numbers Table
I recently got my heads finished and thought id do a comparision on how they flow compared to other heads....but its tough going from 1 sponsor site to the next to check flow numbers.I did a search in here and only came up with 1 page that showed a collective flow sheet of about 10-12 companies.And i thought a mod has an excel sheet too but couldnt find that.So i thought itd be cool if everyone posted their flow numbers,type of heads,company, sizes and what not.Then I can make a nice big table so others can look at the diff companies and see the differences.Just post up what you have and what they flow.Nick
#2
"Advertised" numbers are usually just that....advertised flow numbers.
Independent testing is a must and if your going to round up comparitive data on a group of heads, they MUST be flowed on the same flow equipment with the same fixtures, opening tools, radiused entry for repeatability, flow pipe (the same) on the exhaust, etc. If not it is really just a pointless exercise IMO assuming you really want to compare data).
I just flowed a reworked, expensive "STG III" 243 casting and I'm quite sure the "advertised" numbers weren't even close (230 cc port only mustered 294 Int. CFM's / 200 on the exhaust WITH a pipe).
I also recently flowed another CNC head that was a very good flowing piece....I might add both of these to the "Flow Thread" I started propbably a year or so ago.
Just my .02 of course which you can call BS on or whatever you like
Independent testing is a must and if your going to round up comparitive data on a group of heads, they MUST be flowed on the same flow equipment with the same fixtures, opening tools, radiused entry for repeatability, flow pipe (the same) on the exhaust, etc. If not it is really just a pointless exercise IMO assuming you really want to compare data).
I just flowed a reworked, expensive "STG III" 243 casting and I'm quite sure the "advertised" numbers weren't even close (230 cc port only mustered 294 Int. CFM's / 200 on the exhaust WITH a pipe).
I also recently flowed another CNC head that was a very good flowing piece....I might add both of these to the "Flow Thread" I started propbably a year or so ago.
Just my .02 of course which you can call BS on or whatever you like
Last edited by Tony Mamo @ AFR; 02-13-2006 at 03:59 PM.
#3
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As long as all the heads are flowed on the same bench using the same test procedures, the info would be wonderful. Thunder Racing has several years worth of info with heads they've flow on their SF 1020 bench. In the past 3 years, they've only had about 6 heads exceed 300 cfm on a 3.900" bore. Happily, my small bore AFR 225s were one of them. Bottom line, don't trust all companies advertised numbers. Some are accurate (like AFR and ETP), others are very optimistic. Let the buyer beware.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Originally Posted by Tony Mamo @ AFR
"Advertised" numbers are usually just that....advertised flow numbers.
I just flowed a reworked, expensive "STG III" 243 casting and I'm quite sure the "advertised" numbers weren't even close (230 cc port only mustered 294 Int. CFM's / 200 on the exhaust WITH a pipe).
Just my .02 of course which you can call BS on or whatever you like
I just flowed a reworked, expensive "STG III" 243 casting and I'm quite sure the "advertised" numbers weren't even close (230 cc port only mustered 294 Int. CFM's / 200 on the exhaust WITH a pipe).
Just my .02 of course which you can call BS on or whatever you like
Brandon
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Originally Posted by Patrick G
As long as all the heads are flowed on the same bench using the same test procedures, the info would be wonderful. Thunder Racing has several years worth of info with heads they've flow on their SF 1020 bench. In the past 3 years, they've only had about 6 heads exceed 300 cfm on a 3.900" bore. Happily, my small bore AFR 225s were one of them. Bottom line, don't trust all companies advertised numbers. Some are accurate (like AFR and ETP), others are very optimistic. Let the buyer beware.
Brandon
#7
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Originally Posted by xfactor_pitbulls
Patrick, it isnt that hard to exceed 300 cfm on a 3.90 bore. I will have to send you one of the next 243 heads I finish.
Brandon
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#8
I wasnt asking for Advertised airflow numbers.....i did use them to compare but id obviously prefer personal numbers.Thats why i said included if u can how the flowing was done.I think itd be a good way to compare values to see what your heads do.For example i thought by flow numbers werent so great til i compared them to others personal and advertised numbers...and realized that peak flow numbers dont tell the whole story.
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ARE stage 2 5.3L castings with 2.055 intake and 1.60 exhaust with valve job by WCCH
Flowed at wcch with 4.060" @ 28
Intake 232cc with radius entry
.100 79.2
.200 155.2
.300 211.3
.400 253.3
.500 285.5
.600 309.6
.625 312.4
Exhaust 89cc with pipe
.100 70.6
.200 123
.300 169.1
.400 204.8
.500 225.9
.600 236.4
.625 238.8
Flowed at wcch with 4.060" @ 28
Intake 232cc with radius entry
.100 79.2
.200 155.2
.300 211.3
.400 253.3
.500 285.5
.600 309.6
.625 312.4
Exhaust 89cc with pipe
.100 70.6
.200 123
.300 169.1
.400 204.8
.500 225.9
.600 236.4
.625 238.8
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Originally Posted by Patrick G
Brandon, my comment was specifically aimed toward exceeding 300 cfm on Thunder's SF 1020. For whatever reason, their bench flows way below most other people's SF 600s. FWIW, my milled AFR 225s flowed 316 on AFR's SF 600, but only 310 on Thunder's bench. Any head that flows over 300 cfm by .600 on Thunder's bench usually makes killer power.
Brandon
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Sf1020
Originally Posted by Patrick G
Brandon, my comment was specifically aimed toward exceeding 300 cfm on Thunder's SF 1020. For whatever reason, their bench flows way below most other people's SF 600s. FWIW, my milled AFR 225s flowed 316 on AFR's SF 600, but only 310 on Thunder's bench. Any head that flows over 300 cfm by .600 on Thunder's bench usually makes killer power.
I also agree with Tony@AFR if there is any comparison they need to be the same benches and the same circumstances. I would also like to see the same for dyno testing, use the same runner, valves sizes, and chamber sizes when comparisons are done. Another thing I would like to see when people do these test, use the valves the company who made the parts uses, we work hard developing a port, and valve job, and then they shove some valve in the head that kills the port by 10+cfm, use the valve the head was built for.. or at least one comparable. All too often when comparisons are done chamber sizes are different, and valves sizes are not the same. Side by side back to back comparisons are nice. The problem is with these types of test, the time is money thing comes into play, nobody will donate the time it takes to test all of these heads against each other.
John
Dart Machinery Ltd.
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I just got back my 5.3's from TEA. They are an older used set I got off of here. 2.02 int/ 1.55 ext valves. I guess they would be like stg 1.5 porting.
Here's what they did on there bench. They are milled .050".
int ext
.100 67 / 56
.200 138 / 109
.300 200 / 158
.400 247 / 205
.500 285 / 238
.550 296 / 250
.600 295 / 258
How do they compair with other 5.3's? This sounds pretty decent to me!
Here's what they did on there bench. They are milled .050".
int ext
.100 67 / 56
.200 138 / 109
.300 200 / 158
.400 247 / 205
.500 285 / 238
.550 296 / 250
.600 295 / 258
How do they compair with other 5.3's? This sounds pretty decent to me!
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Originally Posted by Patrick G
Some are accurate (like AFR and ETP), others are very optimistic. Let the buyer beware.
I've had older versions of the PRC heads well over 300cfm on Thunder's bench so I guess I can get in on this discussion.
Let me throw a little more fuel on this fire... I have a set of 215 ET heads that flowed under 300cfm & were claimed to be 320 on the site. I've also never seen a AFR 205 head go over 295 cfm on our bench. Would you guys like me to get some extra data for you?
As always if anyone is in the area feel free to come by & I will flow any cylinder heads we have in stock!
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Originally Posted by JRracing
I just got back my 5.3's from TEA. They are an older used set I got off of here. 2.02 int/ 1.55 ext valves. I guess they would be like stg 1.5 porting.
Here's what they did on there bench. They are milled .050".
int ext
.100 67 / 56
.200 138 / 109
.300 200 / 158
.400 247 / 205
.500 285 / 238
.550 296 / 250
.600 295 / 258
How do they compair with other 5.3's? This sounds pretty decent to me!
Here's what they did on there bench. They are milled .050".
int ext
.100 67 / 56
.200 138 / 109
.300 200 / 158
.400 247 / 205
.500 285 / 238
.550 296 / 250
.600 295 / 258
How do they compair with other 5.3's? This sounds pretty decent to me!
Brandon
#19
everybody post up!!im adding to the excel sheet each time someone posts some numbers.Lets see what you got.And maybe if xfactor_pitbulls, Jason 98 TA, JRracing, or other sponsors dont mind;subscribe to this thread and people who post up flow numbers can have them critiqued from people with experience.
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My AllPro's, here were the flow numbers from mine.
They have REV valves, 2.08 int, 1.60 exh. With a 4.100 bore.
Lift Intake Exhaust/ no pipe
.200 160 125
.300 219 160
.350 242 171
.400 263 180
.450 283 190
.500 303 200
.550 321 209
.600 335 215
.630 347 221 (235 with pipe)
Brian at ARE did them.
Not sure if this helps any.
Rampant
(found out it was a 4.100 bore)
They have REV valves, 2.08 int, 1.60 exh. With a 4.100 bore.
Lift Intake Exhaust/ no pipe
.200 160 125
.300 219 160
.350 242 171
.400 263 180
.450 283 190
.500 303 200
.550 321 209
.600 335 215
.630 347 221 (235 with pipe)
Brian at ARE did them.
Not sure if this helps any.
Rampant
(found out it was a 4.100 bore)
Last edited by RAMPANT; 02-25-2006 at 06:31 AM.