Aftermarket cylinder head debate - who's the best
""I am building the 340 to achieve a very modest 350-375hp, flat tourque cammed engine for my A904, 8 3/4 - 323 geared rear end '67 Barracuda fastback. I am still selecting components for the build but I feel the cylinders head selection is too important to just guess and hope I made the right decision on product and supplier. ""
FOR THAT JUST STICK WITH THE IRON HEADS i made 390 hp 410tq with iron heads and just mild porting on my old 340 10.8 compression 190 cyl pressure. ootb ede heads gave me 10 hp and 20 tq with compression raised to 11.4
I have been building engines for quite a few years, (since 1978 at least) The best engine I built was a 340 +0.040" with BRC moly button Pistons, Mickey Thomson Alloy Rods, a half weight Schieffer Flywheel, Ported W-2's with a six-pack and a hidden NOx system...Alloy rods have an expiration date. Now the engine has the same (rebalanced) crank, polished and shot-peened 340 rods, TRW pistons (eww, but one of the BRC's lost a piece on one of the intake reliefs, and I was in a budget crunch). RPM heads that are worked, a Hughes hydraulic, the lightweight Flywheel, and the six-pack with the original exhaust manifolds that are dangerously thin from extrusion honing.
This engine will be built using the original block, also + 0.040", Molnar crank and Rods, (Still looking for light pistons; Wiseco are my first choice
JE or Ross) I am looking to keep the weight under 550 grams. A roller Hughes cam, TTI Headers and the six-pack.
Here in Germany, I can get 103 octane pump gas without ethanol. It smells like VP...so with Aluminium heads, I plan on going 11:1.
