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Author
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Topic: AFR heads Dyno results
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Billgear
Gearhead Posts: 151
From: Concord,CA
Registered: May 2000
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posted 10-13-2000 12:49 AM
   
As some of you may know I'm building a new
AFR headed late model roller 302. I was looking at the AFR web site and they have
dyno runs posted. My cam specs out between
the two biggest cams shown. I'm really surprised at the high horsepower shown on these graphs. Do you think these are inflated
to help sell heads? I was thinking i'd have
about 350hp not 400+hp. check out
the page and let me know what you think http://www.airflowresearch.com/ford_dyno.htm Regards,
BillGear
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tomslo
Gearhead Posts: 124
From: Jefferson City, MO
Registered: Aug 2000
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posted 10-13-2000 10:43 AM
Those results look about right, based on other information I have seen. The AFR head is a "finished" head, as it has been CNC ported throughout, which gives it an advantage over similar "as cast" heads. One good comparison to keep in mind is the Performer RPM package by Edelbrock. With ported C8 heads, their 302 made 330hp. By installing Performer RPM heads, power climbed to 367hp. This is an example of how much potential is available in after market heads. I have been thinking about getting some AFR heads for either my 91 Mustang or to use on a 393 to swap into my truck, but the 351C in the cougar has top priority. Good luck on your engine, and let us know how everything works out! ------------------
1991 F150, 4X4, lift, 35's, 4.9l
1991 Mustang LX 5.0L, AOD
1970 Cougar, 351C-4v, C6
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MrWesson22
Gearhead Posts: 373
From: Dacula, GA
Registered: Sep 2000
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posted 10-13-2000 12:49 PM
quote:
Originally posted by tomslo:
but the 351C in the cougar has top priority.
Amen brutha! Long live the Cleve!
------------------
Neal
Member #723 (M&M rookie)
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp Women? Naahhh... I'd rather go RACIN!
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jkilroy
Gearhead Posts: 1036
From: Austin, TX
Registered: Dec 99
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posted 10-13-2000 07:05 PM
AFR makes top quality parts. If those guys say its a good part, then it is a REALLY good part.------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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Billgear
Gearhead Posts: 151
From: Concord,CA
Registered: May 2000
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posted 10-13-2000 07:09 PM
I ordered the heads today, i had the springs
and valves upgraded. They are milling the head from 58cc to 54cc. I will be getting them in two weeks.  Regards
Billgear www.289mustang.com
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SteveLaRiviere
Administrator Posts: 14060
From: Saco, Maine MCA # 47773
Registered: May 99
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posted 12-18-2000 12:44 PM
Bill, how do you like your new heads?------------------
SteveLaRiviere/Webmaster -- MCA # 47773
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Rev
Journeyman Posts: 21
From: Houston, Tx., USA
Registered: Dec 2000
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posted 12-18-2000 08:55 PM
I'm trying to decide right now between stage 1 TFTW and out of the box AFR (165cfm) heads. They're about the same price and probably flow about the same from what I can gather. Tell us what your's did for you Billgear. BTW, those Dyno numbers are from an engine dyno with dyno headers (don't even have to fit in a car) and straight 3" pipies. No cats, mufflers or bends. Also no fan or alternator. And with a top notch dyno tune. The conditions are standard dyno rather than SAE. All that adds about 20% to the way OE manufacturers measure power. That's why the numbers seem high.Rev ------------------
'66 Coupe, 306, 300 HP, 13.97/100.3 1/4 mi.
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67coupe
Journeyman Posts: 99
From: dallas NC usa
Registered: Nov 2000
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posted 12-20-2000 04:43 PM
the hp ratings dont sound bad but they also say at the bottom that a stock 95 mustang ran the 1/8 mile in 6.92 seconds think not they are lucky to run it in 8.92 most ive seen run low 9'sso im not impressed with theyre site figures
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