cast iron vs aluminum

[90mustangGT]

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.

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.

 

[srtthis]

thats another thing im not looking at a set of ported E7's... i already have them im looking at world products windsor Sr's

 

[Foxfan88]

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.

I am not sure if i did or not, that was like 3 years ago. I got them off some guy on the corral. They are good heads and people dont give them enough credit IMO, they make good power, the definatly maintain a lower RPM band. Definatly good afor a "sleeper" build. I remember them having considerably more low-midrang power than the TW, but the TW more then make up for it anyways with the more powerful top end.