i am going to be pulling my engine since a valve dampner is broke. i am just going to put on new heads, since i have wanted too and this is the 2nd time that particular head has had problems. what would be a good head to choose, i am thinking about the 215 iron eagle.

my specs
.502 lift solid lifter
.250 dome pistons
air gap intake


this is my daily driver and a strip car about 2-3 time a month. i will spray it with up to 250hp nitrous once and a while.

thanks
mike

Don't know what heads you're starting with. Hopefully a crappy set of 882s so your new heads really give you a big bump in power!

200 or 215cc Dart heads would be about right on a 350 with a healthy cam. You only list lift, so I don't know exactly what RPM range you're trying to operate in. The old rule about it being better to err on the side of a little too small than a little too big still applies, as usual.

Watch your compression with those domed pistons. Dart sells 72cc and 64cc chamber versions of their heads.

the cam is the 282S. 282 duration with a rpm range about 1500-6500. i have 441 heads

i am currently around 3000, but a t56 is going in with 4.56 gears

Pop up pistons? It sounds like a damned if you do or damned if you don't situation because of those.

I did a rough compression check for you. I assumed your pistons were sitting .025" in the hole and that you used a GMPP .028" head gasket (6.5cc). Then I had to take a guess at the piston dome volume. For a .250" dome I assumed it's got +6cc worth of dome (net, with valve reliefs and such taken into account).

Assuming all that is correct (and I'm sure it's not all correct).....

With 72cc chambers you're around 10.4:1.

With 64cc chambers you're around 11.4:1.

I hear people brag all the time about pop up pistons. The reality is that they are an airflow restriction and should be avoided. The best way to raise compression is by reducing the combustion chamber area. That will add more efficiency to the burn instead of a big cancerous lump attached to the piston.

Anyway, do the math with the parts you will use. Make sure all your figures are accurate. Check and double check the results. It is easy to make a mistake.

You want heads with the smallest combustion chambers that you can safely use. There are a lot of good deals on Ebay for Dart heads. Just pay attention to what parts they are assembled with. Some dealers use cheap valves and springs.

i got some pistons for 20.00 they are almost 350 dome, i will have them fly cut to what ever size i want. i think i will shoot for the 64 cc, and keep the piston dome as small as possibly to help air flow, and also will help slightly at higher rpms since i will turn about 6800 at the traps.

Only if they are the heavy solid dome jobbers!!

Lightweight hollow domes and no way..

pdq67

i will need to make sure.

Only if they are the heavy solid dome jobbers!!

Lightweight hollow domes and no way..

pdq67

I was gonna say the same thing

Only if they are the heavy solid dome jobbers!!

Lightweight hollow domes and no way..

pdq67

Come on, what's a little blow by between friends???