cast iron vs aluminum

Foxfan88 said:

i ran a set of thumpers for a while on my car. they are great heads and are a definate upgrade over stock.. but the aftermarket aluminum heads take the cake.

A set of AFRs or TW heads out of the box will flow more that pretty much any ported stock castings. I imagine if you had the cash and was willing, you could make a set of stock heads flow better than the aftermarket, but you'd have more money in them when you could have got a set of aluminum heads.

Plus the weight savins are a pretty big difference. I weighed my full assemble stock castings and they were around 48-50 lbs eash, while a fully assembled TW head was around 26lbs.... your saving around 50lbs off the front of the car.

IMO spend the 1000-1500 for a nice new set of aftermarket heads and be done with it. I got my TWs and never regretted it...wish i would have done it the first time, they make good power out of box and they have even more potential when ported out some.

Click to expand...

90mustangGT said:

Didn't you buy my old Thumper's? My car never ran after that.

They are good heads no doubt, but aluminums are the way to go.

Click to expand...