dhirocz

Anyone know where I can find a chart or something of recent cylinder head intake port dimensions? Everything I've found gave me a 'range' because it's referring to the gasket...

I am looking for the actual intake port dimensions/CSA as well as the minimum CSA. I want a head that flows pretty well in the midrange and on top with ports that need MINIMAL work...ie widening the pushrod pinch or a slight portmatch. Dont want to hog out a CNC head, just touchups. Head has to work well down low since I will be using a rather small cam, in the 226/232ish range @ .050. Not decided yet. I am kind of on the fence between AFR 195 and 210 eliminators, pending port dimensions and CSA info.

I'm building a 427 torque motor with a first injections TPI intake. Using online calculators, it calls for a 2.42 sq.in CSA for peak torque @ 4000 RPM, equating to roughly a 1.76" ID intake runner, which is my guideline for porting (extrude hone). I will most likely go to 1.78" to account for frictional flow losses due to the length of the runners and to keep away from terminal port speed.

Can anyone steer me in the right direction here?

Stephen 87 IROC

Not port dimensions but plenty of flow data

http://users.erols.com/srweiss/tablehdc.htm

COMP

good link

rskrause

I have some data for Gen I heads but not LT1 heads. Is this for a Gen I?

Rich

dhirocz

Yes it is.

rskrause

Do you want what I have? If so, send me your email addy.

Rich