My vote is for the 315 AFR heads with the CNC'd combustion chamber.bigblockwagon wrote:I have a 12 to 1 comp. 461 BBC (LS7) with iron GM 990 heads, professionally ported but no welding or filling has been done. Operating range will be 5500-7300. Current cam is a mild solid roller 6.88/692 and 269/276 @ .050 I'd like to use an aluminum head, and will also change the cam, but will probably limit lift to about .750 so for long valvetrain life. Heads I'm considering right now are AFR 315 CNC, BMF 310, and Pro-Filer 320, But I'm open to any and all comments and advice. I have a max budget of about $3500 for heads, so don't get too exotic.
DOTracer wrote:I ran the BMF 310 on my 461 bbc with 13 to 1 compression and the same .050" duration cam. IN my 3400 lb Malibu, it ran a best of 9.43 @ 141 with a 1.289 60' footbraking. In the heat it would run 9.70's or so at 138.
Probably the best head in that size. I used a Vic jr intake with a 1000HP 4150 Holley.
Cam was a Bullet
269/276 @ .050
110 lsa, 108 icl
Wolfplace wrote:These are both great heads & I think you could throw a blanket over the performance difference here
Personally I would look at what each costs & go from there
If I had to choose my vote would go to the AFR simply because I have seen how versatile this head is & the customer service is second to none.