Quote from: C8WE on December 24, 2017, 05:24:01 AM

On my 427 build with as recieved BBM heads and a RPM intake the dyno rang up 450 Hp and about 500 Trq.  With hand ported  BBM heads, a proper valve job and Blue Thunder intake it produced 525 Hp and 530 trq.

A 427 with BBM heads should make more than 450 unless it was a really, really mild build.  The closest to stock one I have done was already around 440ish with a set of unported medium risers, a stock 2x4 intake, and a 282S Comp (folks here know that that is a very mild street/strip cam).  A set of BBM, Survival, or TFS heads will be significantly stronger than that with a 30 or 40 (or 50?) cfm airflow advantage from comparable cross section.

I have flowed a set of BBM heads using the same valves and valve job we use on my stuff.  Although BBM is a competitor - the parts appeared to perform quite well and were in the 290s with just a valve job and quick blend - no porting.  Similar to my own stuff in terms of flow - single digit differences throughout the curve.  I see single four barrel street 445s making 500 pretty often with mine and would expect about the same with BBMs. 

I do not know how the TFS will compare yet - they are owned by Summit with obviously a huge budget behind the company.  They are cast at the Edelbrock foundry.  My Edelbrock contact says that they provide a raw casting and TFS does all the finish work themselves.  No idea if and where they did their engine testing - it will be interesting to see some results.  I imagine the publicity will come through Summit's magazine relationships - probably see an article in Hot Rod sometime soon with a build at Westech or Grubbs.

The 427 has a Comp 280H cam .  The goal was to get as close to a 66 Fairlane 427 with  hydraulic lifters for a little bit more street drive-ability.  The BBM block was really impressive and needed minimal machine work. The heads were ordered afterwards and looked  good upon initial inspection but weren't scrutinized as closely as the block. Unfortunately once the heads were installed problems arose with the as shipped valve job. The exhaust valves were sunk .09 deeper than the intake valves. There were other problems with the seat/head fitment as well.  It was later decided that a light hand port and blend would be needed and at that time 1.725 exhaust valves might help it . New seats were installed  for both the intake and exhaust. The Blue Thunder intake was port matched. With the ported heads and BT intake it rang up the 525/530 #s on the first dyno pull and that was good enough for me. There is still more hp in the engine but the car is a blast to drive so I'm happy with it.

Hopefully the next build, a 462 stroker motor, will like the TFR heads. The goal is to build a torque monster highway cruiser motor for my 69 formal roof Torino.

FWIW I was planing on using a set of real  C8WE heads for the 462 build but now i'm leaning towards building a C8WE 428 68- 69 Torino Fastback Ford Drag Team tribute .

Interesting. Blair's flow #'s came in right about where I thought they would if we had used a 4.25 bore, assuming that is the bore size Blair did use. I figured ball park add 10cfm. For a street car and even a non full out race car  those flow #'s are great, if they produce on the dyno and or back tire. For the price used in a  street/strip application  they're hard to beat. Out of the box and $500.00 less expensive, they out flow the BBM heads by 20cfm. That is impressive bolt on performance. 

Hi Folks,
For a comparison here are the results  of my BBM heads as received using the same flow bench with a 4.250 bore size. 

Jim Slattery