AFR 225 72ccFlow#s vs Absolute Speed Flow#s
#1
On The Tree
Thread Starter
Join Date: Sep 2002
Location: Carencro, LA
Posts: 137
Likes: 0
Received 0 Likes
on
0 Posts
AFR 225 72ccFlow#s vs Absolute Speed Flow#s
Just recieve an e-mail from Jason at Thunder Racing with these flow numbers. Just making the comparison because I am building a 408 and swapping to the AFR 225 with a 72cc chamber. My Absolute Speed 5.7L Heads are for sale which made 430rwhp with TR224cam. The AFR's have a 2.08intake and a 1.60exhaust while the Absolutes have 2.02intake and 1.55exhaust. The Flow#s for the AFR were done on a 4.030 bore because thats what my iron block will be and the Absolutes were done on a 3.90 bore.
AFR Absolute
Int Ex Int EX
.100 67.7 56.7 68.7 56.9
.150 104.5 85.5 110.1 83.2
.200 145.6 121.7 145.8 112.5
.250 183.7 146.8 174.9 137.6
.300 214.3 173.8 200.9 154.6
.350 237.9 194.1 224.2 171.1
.400 258.4 206.6 246.2 182.6
.450 277.1 214.8 264.8 192.1
.500 294.9 221.2 281.2 198.5
.550 307.2 225.2 294.5 203.3
.600 315.9 228.9 286.4 206.6
.650 295.1 230.9 279.6 209.4
.700 294.4 233.0 282.5 211.2
average 230.5 179.9 219.9 163.05
I hope everyone likes this comparison. Like I said I did this because these are the sets that I own. Plus I wanted to know so I sleep sound at night knowing I spent my money well on a better set of heads. Let me know what you think about this comparison. Between .500 and .700 the AFR flowed and average of 16.66cfm more on the intake side and 22.04cfm on the exhaust side.[CODE]
AFR Absolute
Int Ex Int EX
.100 67.7 56.7 68.7 56.9
.150 104.5 85.5 110.1 83.2
.200 145.6 121.7 145.8 112.5
.250 183.7 146.8 174.9 137.6
.300 214.3 173.8 200.9 154.6
.350 237.9 194.1 224.2 171.1
.400 258.4 206.6 246.2 182.6
.450 277.1 214.8 264.8 192.1
.500 294.9 221.2 281.2 198.5
.550 307.2 225.2 294.5 203.3
.600 315.9 228.9 286.4 206.6
.650 295.1 230.9 279.6 209.4
.700 294.4 233.0 282.5 211.2
average 230.5 179.9 219.9 163.05
I hope everyone likes this comparison. Like I said I did this because these are the sets that I own. Plus I wanted to know so I sleep sound at night knowing I spent my money well on a better set of heads. Let me know what you think about this comparison. Between .500 and .700 the AFR flowed and average of 16.66cfm more on the intake side and 22.04cfm on the exhaust side.[CODE]
#3
TECH Junkie
Join Date: Jan 2002
Location: At the office
Posts: 3,015
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Bo White
Good comparison dude. Very realistic #s.
#4
On The Tree
Thread Starter
Join Date: Sep 2002
Location: Carencro, LA
Posts: 137
Likes: 0
Received 0 Likes
on
0 Posts
Like I said in my post.. just a comparison for me. I just wanted to pass the information on to you guys. At least you get to see what the AFR's are doing on other flow benches. The numbers are a little off from AFR's website, but I am not dissapointed. Its good information if you ask me. Anyway its my comparison because if I didn't buy those AFR's then I would have the absolutes on my 408.
#6
I can shift faster than you.
iTrader: (21)
Join Date: Nov 2001
Location: Baton Rouge, LA
Posts: 5,133
Likes: 0
Received 0 Likes
on
0 Posts
Shawn, I'm glad to see the email went through. I'm looking forward to getting your motor built!
I can post of the AFR 225 flow numbers on a 3.900" bore tomorrow when I find some free time for those interested.
Jason
I can post of the AFR 225 flow numbers on a 3.900" bore tomorrow when I find some free time for those interested.
Jason
Trending Topics
#10
TECH Enthusiast
Join Date: Dec 2004
Location: Chattanooga
Posts: 576
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by verbs
I don't think it's a good comparison at all. Apples to Oranges. Completely different heads flowed on different bores.
Either way though I am sure your 408 will be killer.
#12
Originally Posted by Neustrom
The numbers are a little off from AFR's website, but I am not dissapointed. Its good information if you ask me.
I'm going to start a thread touching on why flowing exhaust ports with a pipe (that is curved downward to simulate a header) is so important, and how an incredible amount of information is LOST without doing so. Does ANYONE run an exhaust port blasting into the open air without a header?....then why would you develop a port that way and check it that way as well. This is a little "off topic" and If I find time today I will address it in a seperate thread. By the way, this information isn't being "aimed" at the creator of this thread....It seems pretty common place and thats why I am addressing it.
Also, I would have preferred the same bore size in a "comparison" as well, seeing that is how it was presented in the first place, but trust me when I tell you that shrinking the bore another .050 per side is not going to eat up the significant advantage you currently have. Depending on the lift point, you might see an additional 1-5 CFM drop. At .600 lift, our equipment shows about 312-314 CFM on a 3.900 bore.
Enjoy the AFR's.....I'm sure they are going to work out well.
Thanks,
Tony M.
#13
9 Second Club
iTrader: (22)
Join Date: Dec 2001
Location: Chicago
Posts: 1,474
Likes: 0
Received 0 Likes
on
0 Posts
Your reasons stated for flowing with a pipe on the ex side is the same reason I've been trying to get across about flowing a head with the intake attached. What is the point of having a hogged out race head with crapy low and mid lift #'s just to hit 320cfm if you cant get more than 285cfm through a ported 90mm LSX?
#14
Originally Posted by ONEBADWS6
Your reasons stated for flowing with a pipe on the ex side is the same reason I've been trying to get across about flowing a head with the intake attached. What is the point of having a hogged out race head with crapy low and mid lift #'s just to hit 320cfm if you cant get more than 285cfm through a ported 90mm LSX?
#15
10 Second Club
iTrader: (5)
Join Date: Nov 2001
Location: Cali/Bay Area
Posts: 3,412
Likes: 0
Received 0 Likes
on
0 Posts
I think the ABS heads held up pretty well considering the different bore tested and the different valve sizes. At any rate, AFR have some killer heads and you should have a stout 408...
Dan
Dan
#17
9 Second Club
iTrader: (22)
Join Date: Dec 2001
Location: Chicago
Posts: 1,474
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Tony Mamo @ AFR
Agreed....Its the same reason I spent so much time developing the 225's "under the curve" numbers (knowing some of the gains found there cost me some peak number advertised "bragging rights")....Id rather brag about how much power I make or how fast the car goes....and 320 "Legit" CFM at .600 is still very respectable at that port volume and cross section.
#18
10 Second Club
iTrader: (19)
Originally Posted by YsoFast
I take it that those AS heads were stage2 because my stage2.5 flow numbers were better than that.
There is no doubt the new motor with the afr`s will be a killer. I cant wait to see the results.
#19
AS Flow #'s
I just had my AS 241 stage 2 heads flowed. Below are the results.
Intake Exhaust
150 79 78
200 156 121.6
300 224 156
400 274 174.7
500 292 184
600 292 190
This was on a 190 bore.
This was without pipe on exhaust (add 10-15 CFM)
The machine shop was very impressed and had lots of questions on who did the work. Awesome job Jay!
Kelly
Intake Exhaust
150 79 78
200 156 121.6
300 224 156
400 274 174.7
500 292 184
600 292 190
This was on a 190 bore.
This was without pipe on exhaust (add 10-15 CFM)
The machine shop was very impressed and had lots of questions on who did the work. Awesome job Jay!
Kelly
#20
On The Tree
Thread Starter
Join Date: Sep 2002
Location: Carencro, LA
Posts: 137
Likes: 0
Received 0 Likes
on
0 Posts
I believe jason at thunder is gunna flow the AFR's on a 3.90 bore so we can get the true comparison. These numbers were just posted to give you guys some insight as to what each of these heads were doing. I would like to see the 3.90 flow#s as well even though my 408 will be a 4.030 bore