[Marv D]

Thomas, I don't know what heads you built the combination around, but something I will offer. I bought a used set of the old AFR 210s, ran them for 3 years and was lending them to a buddy while he builds his 'dream' engine. I decied to take them to my machinist and get them freshened, Decided WTF,, while there and apart, lets spend the $70 to get a flow sheet from a reputable SuperFlo bench on a set of BOX STOCK raceready (not the cnc version) AFR 210 heads.

I've always loved AFR for their honesty in advertised flow. here's the report

@ .2 125cfm
@ .3 180cfm
@ .4 231cfm
@ .5 269cfm
@ .6 287cfm
@ .7 286cfm
@ .8 287cfm

Obvious knee in the flow is at .60

Now remember these were the old 2002 version of the 210 'race ready' package. Todays 210 'eliminator' head is slightly improved and advertised as
.2 139
.3 199
.4 249
.5 279
.55 289
.60 295

That's pretty close being flowed and matching +/- 1.5% from advertised. I sure wish EVERY head manufacturer out there was as close!
Point I'm getting at,, AFR 210 would be a nice head to build around for a upper end street motor with around .55 or .65 valve lift,, or a formidable bracket motor to take a 3500 pound brick into the 10's with enough compression, cam and rpm. I'm using this set on a buddy's 406 with a fairly mild hydraulic roller for a little street small block with balz. I thouroughly expect him to be booted for running 10's without a bar in his 66 Chevy II.

ONLY thing I will say. The alloy AFR uses is the aluminum welders NIGHMARE. I had a set repaired after an major engine explosion and the machine shop could not get a good weld. So they sent the head to a shop specializing in welding aluminum. The head came back beautiful, but the shop told the machinist they didn't EVER want to patch up another set of AFR's. The stuff must be horrible to weld. Don't know why,, just saying if you hurt a set of AFR's find a GOOD shop to do the patching.