View Full Version : head---------Airflow Reasearch BBC
waterbum
10-27-2002, 09:47 PM
First i'd like to say hello to all my friends here,i've been gone for awhile,as though anyone noticed :D My question is,is anyone using the bbc heads from airflow reasearch.I talked to them and they promised me some pretty impressive numbers.I would like to hear from those in the know.Bum
I talked to them also, collected their flow numbers and dropped them into the dyno2000 software.
Initially I was looking at their 305 as is, only to find out that the casting was not available. Only the 315 CNC was available - that might have changed since six weeks ago.
For my cam profile and compression ratio the 305 made significant difference as compared to other heads, after discovering the price and lack of availability I decided to go with dart pro1 310 for significantly better price.
KC
waterbum
10-28-2002, 05:34 PM
I'm very interrested in the cnc'd 315's.625 horses with a cam change and these heads out of my 500hp?Could it be true? Forgot to mention i'm also runnin a stage v Nickerson carb,port matched intake and a crossover.The idea is to build a 540 after I wear the hp out. :D
MellowYelloW
10-28-2002, 05:45 PM
i work for paul pfaff and we tested the AFR's on a stock 502 with 1050dom and mild cam and got 625hp on dyno....from my experence there pretty good heads..
waterbum
10-28-2002, 06:14 PM
I'm liken it more and more!!! :D
in a few word..... inhale, exhale...
earlier tonight I compared my motor between the AFR and Dart Pro 1 and they came out the same, indicating that my "close to stock" motor is not breathing hard enough to take full advantage of the AFRs.
My software says....
454 Mag MPI stock block @9.2:1
cam GM_24502611 211/230 0.521/0.550 w/112lsa
below water exhaust
Dart Pro 1 w/310cc intake runners
452hp @5000, 559ftlbs @3500
Hopeing it will spin a Bravo I 28P
cyclone
10-29-2002, 10:02 AM
i'm pretty sure that those heads are going to be available in December.
flat broke
10-29-2002, 04:23 PM
Give Dave at DNE motorsports a call regarding the AFR heads. I believe he has seen some numbers from AFR and might be able to add a little info to your quest.
Chris
waterbum
10-29-2002, 06:28 PM
Chris do you happen to have the phone # for DNE motorsports? I like to do as much reasearch as possible before making decisions like this,you know,we all want the maximus reliable horsepower per benjamin!!! wink Bum
565edge
10-29-2002, 06:42 PM
I bought a set of dart pro-1 355 cnc ported heads and they are bad ass,i didnt beleive there numbers so i had alan johnson cylinder heads flow them for me and they were right on the money,they flowed 415cfm at .800 lift on intake and 300 on exhaust on a 4.600 bore,my buddy got a set of the afr's 315 or the 325's,and they looked bad ass,either head is goin to be about equal.I spent a $1000 dollars on port work on a set of new merlin vr aluminum 345,s and they only flowed 363 on the same flow bench,those merlin heads suck.with a semi stock motor i would put the dart pro-1 325's on it with a small hyd roller.
565edge
10-29-2002, 06:45 PM
You need to get a hold of bullet racing cams(john partridge)and talk to him about a cam,my friends cam in a similar motor was around 580-610 lift,238-250 duration at .050.
PC Rat
10-30-2002, 10:11 PM
I think it was Car Craft mag that tested a set of the CNC'd AFR 315cc heads. The numbers looked really good to me - for comparison I bought a set of Dart Pro 1 325cc heads (not CNC) and had them flow tested, they were not near what Dart claimed. I had them ported and that improved the flow significantly, but now my heads are 335cc(??) and flow the same as the AFR 315's.
Brian
PC Rat
10-30-2002, 10:19 PM
BTW I think it was Steve Brule' that did the actual testing for the magazine.
Here's a little data for my Dart's at .700" intake.
Darts Claim - 371
Actual - 338
After porting - 379
Brian
Liberator TJ1984
10-31-2002, 05:29 AM
www.airflowresearch.com. (http://www.airflowresearch.com.)
pretty impressive #'s
stix818
10-31-2002, 08:57 AM
We did the research on multiple heads for my motor and ended up buying the new Canfields 350cc intake 113cc combustion chamber. We did minor (and I mean minor) port work and compared them to one of my old man's set of PRO 1s. The PRO 1s only outflowed the Canfields by a tad. We put the figures in Dyno2000 and it said HP was around 915. If you guys are interested in flow figures for these heads let me know. The link is listed below and they list some flow figures as advertised.
Canfield Cylinder Heads (http://www.canfieldheads.com/bbc_990.html)
502procharger
10-31-2002, 11:49 AM
anyone know what kind of money we are talking for a comp. set for a bbc. cnc ported air flow reaserch 335's? or what a set of the cnc dart pro-1 heads go for?
stix818
10-31-2002, 02:48 PM
I gave false info earlier. We compared them to fully ported Brodix IIs. The Canfields (113cc combustion chamber, 355 intake) flowed 388cc and the Brodix 398cc. For the money spent I would stay away from AFR. Doug Hebert has some reasonable prices for PRO 1s (smallest combustion chamber is 119cc). Link is below.
Doug Hebert (http://www.herbertperformance.com/Catalog/CylinderHeads/Dart_Cylinder_Heads/dart_cylinder_heads.html)
[ October 31, 2002, 02:49 PM: Message edited by: Stix818 ]
565edge
10-31-2002, 07:15 PM
502procharger:
anyone know what kind of money we are talking for a comp. set for a bbc. cnc ported air flow reaserch 335's? or what a set of the cnc dart pro-1 heads go for?You can get a set of dart cnc 335's for around $2800,thats complete with springs,retainers,valves,the whole enchilada,i would buy from shafiroff racing,they have a web site,talk to pete,price depends on cam size(what springs you will need)but they threw in new pushrods on my deal,free shipping and no tax,you cant compare heads from reading there websites,pOne company will flow on a 4.250 bore and give you flow numbers,another will flow on a 4.625 bore and give numbers,some on diffrent inches of water,some with a test pipe and some without,i went threw alot of bullshit when i went to get my heads and wasted alot of money,my darts flowed exactly what they said,i told them if they didnt i was going to ship than back,shafiroff has them in stock and ready,my buddy got dicked around by afr after leaving a deposit for his heads,3 months later and he got them!good luck,some heads gain as much as 30-40 cfm by flowing on a bigger bore,remember that.
502procharger
10-31-2002, 07:21 PM
565
would those heads do well for me on a bbc 540? i know cam has alot to do with things, but i am looking for a good starting place with new heads. i have merc 500hp rec port heads with very mild port work and my motor without my procharger dynoed at 634hp. what kind of hp gains can you expect from a good set of aftermarket cnc heads.
waterbum
10-31-2002, 07:40 PM
Edge,AFR has already warned me about the delivery time,i've got all winter.Price they gave me for a complete set of cnc 315's with ferea (misspelled)exhaust valves was $2939.I like all the positives I have heard about these heads.Flow numbers aside they are built strong and would stand up well to an abusive marine envirenment.I think i'm sold.Thanx for all the input guy's.Anyone else have something I should know,feel free to tell me. :cool: Bum
waterbum
10-31-2002, 07:49 PM
502,AFR claims 175hp over stock cast-iron units.Check out their web site at www.airflowresearch.com (http://www.airflowresearch.com) or call them at (818)890-0616.After I wear out my hp500 I also plan to build a 540,these heads should be dynamite.Good luck,Bum
565edge
10-31-2002, 08:23 PM
waterbum:
502,AFR claims 175hp over stock cast-iron units.Check out their web site at www.airflowresearch.com (http://www.airflowresearch.com) or call them at (818)890-0616.After I wear out my hp500 I also plan to build a 540,these heads should be dynamite.Good luck,BumThe owner of afr does have a boat,a placecraft,it runs pretty well,he has a place up at naciemento at heritage ranch.
565edge
10-31-2002, 08:25 PM
502procharger:
565
would those heads do well for me on a bbc 540? i know cam has alot to do with things, but i am looking for a good starting place with new heads. i have merc 500hp rec port heads with very mild port work and my motor without my procharger dynoed at 634hp. what kind of hp gains can you expect from a good set of aftermarket cnc heads.The heads will work great,shafiroff is out of new york,give pete a call and see what he suggest's,you might want to go with the dart 335's.
502procharger
11-01-2002, 08:53 AM
anyone know what a set of gen VI 500hp heads are worth. just hot tanked and magged. disasembled, but all parts including manely severe duty valves would be included. if anyone knows please let me know. oh ya, they also have mild bench flow porting. help?
[ November 01, 2002, 01:59 PM: Message edited by: 502procharger ]
502procharger
11-01-2002, 10:14 AM
bum
i spoke with tony at afr today same price 4-6 weeks delivery. 159 for the upgrade to supper alloy exh. valves( i have a procharger) let me know what you are going to do, maybe they will cut us a small price break on 2 pair.
MellowYelloW
11-01-2002, 12:58 PM
I need to correct my info...the heads that we tested were cnc ported heads...we also tested the same motor with a set of unported (no mods at all) dart heads and they produced the same amount of power as the cnc afr heads. hope this helps you out!
hack job
11-01-2002, 02:09 PM
waterbum:
Chris do you happen to have the phone # for DNE motorsports? I like to do as much reasearch as possible before making decisions like this,you know,we all want the maximus reliable horsepower per benjamin!!! wink Bumwell he two #'s
office 949 631 3781
and cell
714 343 3243
or
www.dnemotorsports.com (http://www.dnemotorsports.com) wink :D
hack job
11-01-2002, 02:10 PM
hack job:
waterbum:
Chris do you happen to have the phone # for DNE motorsports? I like to do as much reasearch as possible before making decisions like this,you know,we all want the maximus reliable horsepower per benjamin!!! wink Bumwell he two #'s
office 949 631 3781
and cell
714 343 3243
or
www.dnemotorsports.com (http://www.dnemotorsports.com) wink :D update that page isnt up yet!
PC Rat
11-08-2002, 09:33 PM
MellowYelloW,
What size were the Dart and AFR heads and what size cam was in that 502?
Thanks,
Brian
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