Hard to imagine that high perf heads cost less than exhaust manifolds.

Chris,
It is all that extra machining that goes into exhaust manifolds. Ya, right....

Can you say marine parts.

Rick

Can anyone tell me the best application as fas a aluminum or cast iron head?


I do run in salt water, but flush the HELL out of it when I'm through.

Thanks!

Any input on the Dart Iron Eagles?
I would think that the castings are close the same as the Pro1s only much less $$$.
Dave

Dave,
I heard that the Iron Eagles and Pro1's were the same casting only difference was iron vs aluminum. If you get the flow numbers from Dart they should match.

But I think for blower application you are better off with aluminum as they conduct the heat away from the chamber faster and prevent detonation in this application.

Shoot me an email when you get a chance, I would like to hear how the project is going. Have you started yet.

Rick

Shawn/29Scarab,

Go to the thread titled; "Headers" by "88 Mach 1" in Technical Q & A. We went into some detail there that you might be interested in.

Dean,

I have used the Dart Pro ones 310-325cc with great success. I believe either port volume will work well for your app. If your going to have the heads ported I would start with the 310s with a 2.300 valve. The final airflow numbers will be the same, with a little less volume with the 310 head. The exhaust ports on the Darts out flow the canfields up to I believe .600 lift. Unfortunatly a chamber port will not get your compression down enough to achieve your desired compression ratio. You may want to look at the 320 Darts the are capable of 130+ cc's after a chamber port and valve grind. The 320's have a much thicker deck than the Pro Ones. This could save you from buying new pistons. As with any head, porting will increase flow and hp. I would recommend a full chamber and exhaust port minimum.

As far as price the Pro Ones are $1570.00 bare. I include seat blending in that price. My assembled price is more expensive because of the hardware in them. Be careful about the quality of the parts in the Jip Joints assembled heads.

jim v
 

what cc’s are the stock heads on a new 502 gm crate motor (435hp, 8.75cr)?

what would the cr be with the 320 Darts after a chamber port and valve grind if the chamber = 130 cc's?

what would you charge for a job like this on 2 sets of aluminum heads with Ferrea Super Duty exhaust valves installed?

I will install brodix bb2 rect.
479-394-1075.brodix team

Dean

The head volume should be 119cc. A 130 chamber would be 8.2:1. I believe the most volume I got out of the pro one heads was 126cc which would be 8.43:1. I may be able to squeek a couple more cc's out of the pro ones.

320 Dart Heads......1,825.00
Exhaust valves..........264.00
Intake valves.............160.00
Titanium Retainers.....140.00
spring locators.............40.00
valve seals..................20.00
Keepers 16 -.050........50.00
springs.......................170.00 hydraulic roller/ 320.00 mech roller
Chamber port ...........250.00
full Exhaust port........450.00
Bowl port intake........150.00
valve grind................120.00
hone guides.................60.00
assemble N/C
Total.........................3,699.00 per pair

cut heads (if needed)100.00