AFR Independent Flow numbers inside
AFR Independent Flow numbers inside After getting beat by Joe Prince on a set of heads I decided to flow my AFR's before I put them on. Well overall I am very pleased; I am attributing any difference in CFM to the difference in flow benches used. The heads were flowed at South Jersey Cylinder head, the owner has been in the business for 13 years and is a great guy. Heads are AFR 205's 66cc chambers, patriot gold duals,2.02int, 1.57exh they were flowed on a 4.030 bore I asked for a 3.900 but the guy for some reason used 4.030, he did not use a pipe on the exhaust side. So I am calling it equal (fair comparison). Oh yeah 28" of water.
Advertised Numbers Independent #'s
Int Exh Int Exh
.200 140 112 138 112
.300 200 170 208 168
.400 251 203 251 199
.500 281 221 285 225
.550 292 226 na na
.600 301 230 290 226
I guess you get what you pay for when you go with a reputable company.
Advertised Numbers Independent #'s
Int Exh Int Exh
.200 140 112 138 112
.300 200 170 208 168
.400 251 203 251 199
.500 281 221 285 225
.550 292 226 na na
.600 301 230 290 226
I guess you get what you pay for when you go with a reputable company.
how come the damn charts never line up the way you type them
for anyone that is confused the 2nd set of numbers are the independent ones
Oh yeah the heads are going on tonight
for anyone that is confused the 2nd set of numbers are the independent ones
Oh yeah the heads are going on tonight
What happened to the JPR heads and why did u take them off.Just curious,if u wouldve locked the VIG your JPR's wouldve made about 387RWH/378RWT which isnt too bad for an A4.I made 380/376 with the same setup and ran 11.40's@117.
The AFR's do look awesome...
Good luck..
The AFR's do look awesome...
Good luck..
I don't get it. The independant numbers should have been higher than the advertised numbers, since they were flowed on a 4.030 bore instead of 3.9. Had South Jersey Cylinder head flowed them on a 3.9 the numbers would be lower.
Last edited by Reboot; Sep 17, 2004 at 12:35 PM.
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
Posts: 4,983
Likes: 13
From: Texas
Originally Posted by MYBLKSS
After getting beat by Joe Prince on a set of heads I decided to flow my AFR's before I put them on. Well overall I am very pleased; I am attributing any difference in CFM to the difference in flow benches used. The heads were flowed at South Jersey Cylinder head, the owner has been in the business for 13 years and is a great guy. Heads are AFR 205's 66cc chambers, patriot gold duals,2.02int, 1.57exh they were flowed on a 4.030 bore I asked for a 3.900 but the guy for some reason used 4.030, he did not use a pipe on the exhaust side. So I am calling it equal (fair comparison). Oh yeah 28" of water.
--------Advertised Numbers--------Independent #'s
---------Int-----Exh----------------Int----Exh
.200____140____112______________138___112
.300____200____170______________208___168
.400____251____203______________251___199
.500____281____221______________285___225
.550____292____226______________na_____na
.600____301____230______________290___226
I guess you get what you pay for when you go with a reputable company.
--------Advertised Numbers--------Independent #'s
---------Int-----Exh----------------Int----Exh
.200____140____112______________138___112
.300____200____170______________208___168
.400____251____203______________251___199
.500____281____221______________285___225
.550____292____226______________na_____na
.600____301____230______________290___226
I guess you get what you pay for when you go with a reputable company.
Flow + velocity = a good thing
On the bench I know a set were tested on, they cam e in spot on with what AFR reported.
Last edited by J-Rod; Sep 17, 2004 at 12:56 PM.
Trending Topics
JS...The reason I was not satisfied with the JPR heads is because I spent $1400 and picked up 7 peak hp inaddtion the car lost power across the board (except peak) it also slowed down. My best time was cam only.
Sam... I went with AFR for a few reasons
1. 205 intake runner...I like the idea of the higher velocity port
2. The AFR head leaves me room to expand in the future if I ever go larger than 347
3. AFR is a reputable company that stands behind there product
Sam you are also basing your opinion on advertised numbers. In addtion a lot of sponsors on this board are not running anywhere near a 205cc Intake runner
I am very happy with my choice I will post my numbers after the install
Sam... I went with AFR for a few reasons
1. 205 intake runner...I like the idea of the higher velocity port
2. The AFR head leaves me room to expand in the future if I ever go larger than 347
3. AFR is a reputable company that stands behind there product
Sam you are also basing your opinion on advertised numbers. In addtion a lot of sponsors on this board are not running anywhere near a 205cc Intake runner
I am very happy with my choice I will post my numbers after the install
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On The Tree
Joined: Sep 2004
Posts: 188
Likes: 1
From: Houston, TX
Personally, I'm happy that AFR is casting LS1 heads. Their castings are really good. They generally have enough port wall thickness that a head porter can do his thing without having to worry about breaking into a water jacket. Also, the aluminum they use is very high quality, and easy to weld should the head ever need it, like from a blowup.
The flow numbers I've seen on their CNC heads are usually within a few cfm from what I get on my bench.
The single best 23 degree Small Block Chevy head that's ever been on my bench was an AFR 227. Enough said about AFR's ability to design a head in my book.
I plan on getting a set of the 225's when they're available. I'm anxious to see what they'll do compared with the standard Chevy LS6. I'm thinking they'll be a lot better, especially up at high lift. The Chevy head has some thin areas where we need for them to be thick. That places severe limitations on a head porters ability to get them to flow smooth above .600 lift.
The flow numbers I've seen on their CNC heads are usually within a few cfm from what I get on my bench.
The single best 23 degree Small Block Chevy head that's ever been on my bench was an AFR 227. Enough said about AFR's ability to design a head in my book.
I plan on getting a set of the 225's when they're available. I'm anxious to see what they'll do compared with the standard Chevy LS6. I'm thinking they'll be a lot better, especially up at high lift. The Chevy head has some thin areas where we need for them to be thick. That places severe limitations on a head porters ability to get them to flow smooth above .600 lift.
Justin99TA, Did you get a flow sheet with your PP 5.3s or have them independantly flow tested? I received no flow sheet and did not have them flowed by an independant bench. So I hope the flow what there supposed to. That's why TSP dropped Patriot as the heads were not flowing what they should have. Also the PP 5.3L's are a 214cc intake runner compared to the AFR's at 205cc. Port velocity of these low cc AFR heads is what stands them apart from others as factory ported LS1 castings cannot flow that much with a small 205cc runner, hence the porting. AFR will really get big when the 225's come out! BTW my AFR 195's on my 360SBC Marine engine are simply awesome!
That's mighty impressive! Looks like the AFR's were worth the money.
That doesn't necessarily mean they will perform similarly for the reasons Ryan stated. There is much more to a well performing head than just flow.
Josh
Originally Posted by Justin99TA
Not to be an *** but my Patriot 5.3s flowed 6cfm more for $1000 less.
Josh
Maybe it's just me but I'm sorry I don't think those numbers are all that great. Two weeks ago I put on a set of AS 5.3's that flowed 305/222 cfm at .550. With a tiny CC216/220 I picked up 37HP. Soon a TR224 .563 112LSA will be going in and I hope another 15 to 20 HP.
guys, you can spout off you "higher" flow numbers over the AFR's but your not looking at the whole picture. Ryan is the pefect example, his PP 5.3's heads get there *** kicked by mikey's (rapid motors) 5.7 stg 2 heads with stock compression in under the curve power. same cam, mods, and tuning.
I didn't intend for this post to go this way. I just wanted to post up MY flow numbers and provide other users with some good info. You cannot compare 2 different sets of heads unless you have them both in front of you on the same bench. You have to create a level playing field; unfortunately we do not live in a perfect world. It is almost impossible to create a level playing field and I don't believe any of the Sponsors on this board are willing to donate a set of their off the shelf heads for a competition. I also don't think any of the large magazines are willing to perform and then publish the results of a head competition. Therefore, you have to base your decision on certain other factors. Mine are listed above.
Originally Posted by bigdsz
Maybe it's just me but I'm sorry I don't think those numbers are all that great. Two weeks ago I put on a set of AS 5.3's that flowed 305/222 cfm at .550. With a tiny CC216/220 I picked up 37HP. Soon a TR224 .563 112LSA will be going in and I hope another 15 to 20 HP.
Uneducated to say the least. what was the runner volume of those patriots? Answer that question and you will see why the AFR's are the ****? And their -6cc flowing heads will walk your 1K heads in a heartbeat. YOu get what you pay for and all you paid for was a few peak numbers....
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
Posts: 4,983
Likes: 13
From: Texas
Originally Posted by HumpinSS
Uneducated to say the least. what was the runner volume of those patriots? Answer that question and you will see why the AFR's are the ****? And their -6cc flowing heads will walk your 1K heads in a heartbeat. YOu get what you pay for and all you paid for was a few peak numbers....