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Author Topic:   DART HEADS
hobby10k
Member
posted June 25, 2004 06:56 AM
I am looking at getting the dart iron eagle heads dont know what runners to use.
I will be running them on a SB434 using alcohol. will the 215 runners be good like the other guy bought or will the larger runners be better? although the larger ones don't offer the 2.08 valves. just want to get what will work best with my application.

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Raz_900
Member
posted June 25, 2004 01:17 PM
On a 434 CID motor, I'd go for 220-230cc heads. Do you have to run iron or can you run aluminum? The 215's would work, and work relatively well, but wouldn't take full advantage of the CID and alkie.

World Motown 220's wouldn't be a bad choice either in iron or aluminum.

Either can be had with 2.08 intakes and 1.6 - 1.625 exhaust. On a 434, I'd go with the 2.08's and the big ports. Assuming you're not worried about response at/below 3000 rpm.

awkwardjeff
Member
posted June 25, 2004 01:55 PM
All I can say is don't forget to fly-cut the valve reliefs in the pistons..... From the sounds of things you are just bolting on a new set of heads on a assembled short block. I can't tell you the number of people that have trashed new valves, push rods, ect. because they THOUGHT bolting on new heads would help them WIN. Most pistons are fine for a 2.05 valve..... You can get them out of the box for 2.08 no problem..... But most pistons have a smaller relief to help with compression.


rocket36
Member
posted June 25, 2004 02:12 PM
checkout the pro iron lightning or pro action (aluminum). 220cc up to 255cc would be good.
we use a set of 210cc on a 415cui and they're a bit small to flow high in the rpm range but they do offer very good mid range torque and drivability but lack in the top end horsepower.


hobby10k
Member
posted June 27, 2004 02:12 AM
alright! I will check into the motown and the pro heads. they sound pretty good.
thanks for the valve warning, I figured we could have gotten away with it, but we would have caught it when we clearenced the engine.
yes we must run steel heads at our track, and does not look like it will change so I want to get the best heads for my applicatoin. thanks

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