Is anyone using these?

[74bowtie]

--------------------------------------------------------------------------------
I am looking into the Dart heads, they are the cast iron ones check out this auction for the detail if you would. I would like anyone input on them.
http://cgi.ebay.com/ebaymotors/ws/eB...category=33617

I am also looking into the same style set but with 64cc chambers and the staight plug.

[shuttermutt]

Iron Eagles? Damn good head from what I hear. My carb man (and long-time circle track guy) uses them and recommends them. I'd take a set of well-tuned iron heads over aluminum any day of the week.

[68CST327]

This might be an old topic, but what are the advantages of iron heads over aluminum? I've heard people in the past say they prefer iron heads, but what are the reasons?

[shuttermutt]

Iron Pros

- Retains heat (remember, heat == power)
- More durable
- Less expensive

Iron Cons

- Heavy

Aluminum (alloy) Pros

- Light weight
- Easy to repair

Aluminum Cons

- Expensive
- Can have "hot spots"
- Less durable

It's generally accepted that iron heads will produce just a little bit more power than alloy heads when everything else is equal. Where the alloy head wins, however, is in the weight department. In general, the weight you save will easily offset the very small performance hit.

Now, before everybody goes off on me, I'd like to point out that there are more high-performance designs available in alloy than iron these days. What that means is that you're far more likely to find a great performing alloy head "out-of-the-box" than you are an equivalent iron head. I do think the Iron Eagles are an exception to that rule, however.

For me, I'll take the weight hit just to have a more durable, inexpensive, and forgiving part. Want to know what the weight difference between iron and alloy is like? Leave your spare tire at home.

[Oborny71]

with aluminum heads you can run a little more compression, like .5 point or so , that helps some with power. I am running 190 AFRs they are sweeeet. I will never buy any other kind of head again. they out flow all of their equvilents, and even these street heads ouflow some of the other companies race heads. I'm an AFR fan for life. they are pretty expensive, but well worth the investment. just my .02