Pontiac Head Flow - 197 Casting

FSA1673 · 03-28-2011, 01:53 PM

What intake head flow at 0.425 lift would one expect from a properly prepared legal stocker 197 casting pontiac head. Engine is 455/335 hp combo with all the normal stocker stuff.

I understand that peak flow is not the wole equation but I assume you need a certain amount of peak flow to develop a certain amount of peak hp.

PM me if you do not wish to post. All information would be much appreciated.

Scott Underhill.

FSA1673 · 03-31-2011, 11:16 AM

My heads flowed 230 cfm at 28" max lift. On the dyno I made a peak power of 470 hp at 5250.

Just wondering if my head flow is holding the peak power back?

Glenn Briglio · 03-31-2011, 12:22 PM

How was the torque curve?

FSA1673 · 03-31-2011, 12:52 PM

Torque curve is fairly flat, 510ft-lbs at 4500 to 470 ft-lbs at peak power. Converter stall speed is 4500.

03-28-2011, 01:53 PM	#1
FSA1673 Junior Member Join Date: Jan 2010 Posts: 83 Likes: 0 Liked 12 Times in 6 Posts	Pontiac Head Flow - 197 Casting What intake head flow at 0.425 lift would one expect from a properly prepared legal stocker 197 casting pontiac head. Engine is 455/335 hp combo with all the normal stocker stuff. I understand that peak flow is not the wole equation but I assume you need a certain amount of peak flow to develop a certain amount of peak hp. PM me if you do not wish to post. All information would be much appreciated. Scott Underhill.

03-31-2011, 11:16 AM	#2
FSA1673 Junior Member Join Date: Jan 2010 Posts: 83 Likes: 0 Liked 12 Times in 6 Posts	Re: Pontiac Head Flow - 197 Casting My heads flowed 230 cfm at 28" max lift. On the dyno I made a peak power of 470 hp at 5250. Just wondering if my head flow is holding the peak power back?

03-31-2011, 12:22 PM	#3
Glenn Briglio VIP Member Join Date: Nov 2002 Location: Massapequa Park,NY Posts: 1,280 Likes: 1,888 Liked 965 Times in 306 Posts	Re: Pontiac Head Flow - 197 Casting How was the torque curve?

03-31-2011, 12:52 PM	#4
FSA1673 Junior Member Join Date: Jan 2010 Posts: 83 Likes: 0 Liked 12 Times in 6 Posts	Re: Pontiac Head Flow - 197 Casting Torque curve is fairly flat, 510ft-lbs at 4500 to 470 ft-lbs at peak power. Converter stall speed is 4500.