Re: AFR heads: Anyone else interested in buying?
 

wags,I'm seriously thinking about the same two pkgs you are,hard coated with a set of iconel valves minus springs/retainers. The only thing is i willl probably need to buy them on my visa which won't work as a pkg deal,are they going to go much less than racer net if you buy 2 sets?pm me and let me know,Smitty

Re: AFR heads: Anyone else interested in buying?
 

Are you going to use the Comp 'Beehive' springs and titanium retainers?

Re: AFR heads: Anyone else interested in buying?
 

wags pm me a price on what 3 pairs of the afr 347s cnc'd would run me please. complete for blower motors. Iconel valves, hard coated as well please.

Re: AFR heads: Anyone else interested in buying?
 

I hope you would be able to do better than jobber at least 5-10%off. If any body pays racer net or above is getting screwed!!

Buying 2 or 3 sets at a time should qualify as engine builder ,sometimes engine builder is the same as warehouse distributer price structure.I am shure if you have a group buying we could get Too old to get set up as a WD.Its not hard.


Let me know if you have to pay above jobber

Re: AFR heads: Anyone else interested in buying?
 

I have afr 335's. I went & had my heads flowed when I got them from afr & they flowed better numbers then what the web site says. My engine builder said he has flowed a number of afr's & has yet to see any that were less then the web site. I do not have the numbers but I have posted them on OSO before.

A number of people have told me that the AFR's have more meat to them then the Darts do & have less problems with blowing head gaskets.

Re: AFR heads: Anyone else interested in buying?
 

I think unless I was building an insane 502", my choice would definitly be the AFR 265 ovals, cnc ported to 290cc on the intake....the as cast 265's compare VERY favorably with the as cast 305's. I think for a 502 turning 5500r's that this is the ultimate head! At least with any lobe design that I would use on a marine engine. I would also seriously consider them for a 540ci...they might be a little harder on the drive though! LOL

Re: AFR heads: Anyone else interested in buying?
 

What are the flow numbers for the 290CNC? They are not on their website.

Re: AFR heads: Anyone else interested in buying?
 

Here are some flow numbers off my flow bench @ 28"

.................AFR CNC............................................Dar t Pro One Ported ex


Intake........ex............Re ported chamber
.2 160......133..............172.........136......... .........................133
.3 228......184..............250.........193......... .........................173
.4 297......226..............312.........239......... .........................240
.5 349......249..............357.........261......... .........................277
.6 384......259..............388.........263......... .........................296
.65 393.....260..............397.........263.......... ........................299
.7 398......260..............400.........263......... .........................306

The Intakes work well out of the box, with extra porting even better. The exhaust out of the box are turds at best. The tests were conducted without a cheater pipe on the exhaust port. It's more clear, after looking at the second set of exhaust numbers that the port is peaked at 1/2 inch lift, indicating a restriction in the port. Extra porting is needed on the CNC ported AFR's to duplicate the dart numbers, or to make the port "right".

Re: AFR heads: Anyone else interested in buying?
 

jim,are these flow #'s for afr's or dart pro 1's?

Re: AFR heads: Anyone else interested in buying?
 

Hi Jim: Congrats on your win at LOTO! I meant to get together with you but it was too busy. Question, on a blower engine (centrifugal) would it make sense to leave the intake alone, concentrate on the exhaust and still use a dual pattern cam? You know what I'm thinking; good low end torque, but lots of exhaust flow for when you are under boost.