edelbrock cylinder heads
The engine in this photo is my 416 which pumped out 520 h.p. and 500 lbs. of tq. with BARELY touched Edelbrocks,can't wait to see how they perform when some serious port work is done to them..i'm not saying the rhs are no good,they're just no good for me i've had get results with the Edelbrocks and no reason to switch or try any other heads right now..
Let dissect this 'barely touched' description..
I take it that by 'barely touched' you mean they are mildly ported, right?
Not 'full ported' but 'mildly ported'.
I think I get that part...
so now we know that every 5cfm is worth 10hp according to AFR, so 520/10=52x5=260cfm
Thats if your builder is as good as 'you' say he is and get the volumetric efficiency decent 'were talkin stroker here'
so if your heads flow 260cfm 'mildly ported' they must have flowed pretty bad to start with , for a $2000 set of after market heads.
I mean...when I 'mildly port' heads I usually see around a 20-30cfm gain..
heck, that would have your heads in 230-low240's cfm range 'ootb'
A good 5 angle comp valve job thats blended and x's/J's will flow that..
Less weight doesn't make more hp, it's just compensating for the lack of power, kinda like what nascar did in the early 70's for chevys when they couldn't keep up..This is an instance when 'cubic dollar' doesn't get you ahead.
You can actually lose heat or power with aluminum when compared to identical iron heads on an identical tuned combo/setup
I would run a point higher compression if going to aluminum heads, but I would expect 50+cfm over the alternative iron head for me to change that direction to begin with. this is info, not preference..because it's based in fact and facts are what good choices/decisions are based on.
If they cost identical $$$$ and flowed identical #'s and i was building from the ground up to change comp ratios....I would then look at the eddys as the better choice.
I think this is grounded thought.