Heads, how much gain?

[roccodart440]

total timing with the less efficient iron heads is around 37° aluminum will be around 33°

My aluminum heads liked more timing when I dynoed it. It did best at 38 degrees but I set it at 36 to be cautious.

 

[roccodart440]

Who did the porting work? I am at about 370 HP with iron J heads with 2.02 intakes and a Comp 268 XE cam, headers and a complete MSD ignition setup. I'd hate to spend $2,000 on a pair of ported Eddy heads and have an unnoticeable power increase.

Jim Laroy

 

[Oldiron440]

My aluminum heads liked more timing when I dynoed it. It did best at 38 degrees but I set it at 36 to be cautious.

What heads do you have? The amount of total timing needed depends on the efficiency of the heads...

 

[roccodart440]

What heads do you have? The amount of total timing needed depends on the efficiency of the heads...

Ported Edelbrock RPm heads. 2.20 intake valves. 345cfm.

 

[A Body 440 WHY NOT]

Call Bruce at Toth performance in PA.
He builds and ports aluminum heads for the price of stock eddys

 

[B3422w5]

No brainer
TF 240 heads.