I wasn't talking about just Edelbrocks i was refering to aluminum heads in general..i currently run Edelbrocks with none of the problems you've described..they have their limits too so when i step up to wanting more power i'll going a different route.
I believe you mentioned that in another thread, good deal.
Other have not been so fortunate.
you can get away with running more compression with aluminum heads too..and they do cool a LOT quicker
Thats what less thermal conductivity will contribute to along with closed chambers, in which production magnum heads and the RHS heads already have.
which comes in handy when you need to work on the engine between rounds on a hot summer day
The heat go's somewhere, that somewhere is thin air and also the cooling system, the block and all other non aluminum internals will still be hot, as would the rocker shafts,bolts,headers,valves & bits till the aluminum pulled it out....whos got the stop watch?lol
So the aluminum heads really don't have the engine cooled in a significantly shorter amount of time....though the heads will be 'touchable', all the stuff attached will be just as hot.
Besides...if the heads have to come off at track, you're mostly done racing... unless you are ron johnson and have a race team and 250k worth of trailer/team members and a title/championship at stake.
..and as for the aluminum heads just being lighter geez,is that the ONLY reason the pro classes run them ie:top fuel,funny car,pro stock ect???
light is the word here, who wants to run a land barge down the track at 180-200+ mph at 4-6 seconds, aluminum is easily repairable 'in most cases' and if everyone else ran aluminum heads and you run iron...you would have to lighten the car in other ways to make up for it *race weight* *UNLESS THE IRON FLOWS MORE*
top fuel? In that example you gave it would be like running a marathon in sandles while everyone else wears nikes/new balance 'running shoes'.....and look at the fact that there are no factory heads that would flow the 400-500 cfm that is necessary for top fuel....and you do know that aluminum is cheaper/easier to cast right?
...as far as the misconception comment any builder will tell ya' if you want to make most power possible aluminum heads have the most potencial of doing it...but you use what you want...
Well that is because we are talking about 40+ year old motors that never had aluminum heads for starters, then for 2nds they don't make an aluminum head for a 40+ year old mopar v8 that flows less than a stock head....so in that angle of corse that 'any builder' advice has merit, but it does not cover everything under the sun.
It is what it is, and nothing more.
