Help..New GMPP Vortec Heads?
Le Mans Master
Joined: Nov 2004
Posts: 6,434
Likes: 0
St. Jude Donor '07
http://www.gmpartsdirect.com/perform...s/frameset.cfm im runnign these heads i liek them because there 58cc and you can get a higher compression. i should have around 11 to 1 compression. Im running .550 lift cam victor intake mahle psitons h beam rods. my heads do have a 1000 dollar port job though and they flow about as good as a set of flowed vortec heads.( my uncle runs vortecs in his truck roundy round car becuase they ahve to use stock componets ) ill tell you hp its making in a week or 2 when i get in running.
Instructor
Joined: Oct 2004
Posts: 173
Likes: 0
From: Hattiesburg MS
Originally Posted by jofm3
I just finished my 355ci with center bolt vortec heads. My set up includes 10.5:1 Keith Black pistons, eagle 6"rods, Lunati roller cam set up, 232 dur. .485 lift with Harland Sharp 1.6 roller rockers, I used a Professional Products Hurricane intake, Quick Fuel Holley 750, Pete Jackson timing gear set, Hedman Elite ceramic coated headers. Scat 10/10 crank, Mallory Unilite distributor, MSD 8.5mm wires and AC double platinum plugs. We did 7 pulls on the dyno and after tuning put up 427 hp/431 lbs. The heads are only good to about 6200rpm then the numbers really drop off. Feel free to drop me an email if you have any questions.
Hope this helps...
Jerry
Hope this helps...
Jerry
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by jofm3
I just finished my 355ci with center bolt vortec heads. My set up includes 10.5:1 Keith Black pistons, eagle 6"rods, Lunati roller cam set up, 232 dur. .485 lift with Harland Sharp 1.6 roller rockers, I used a Professional Products Hurricane intake, Quick Fuel Holley 750, Pete Jackson timing gear set, Hedman Elite ceramic coated headers. Scat 10/10 crank, Mallory Unilite distributor, MSD 8.5mm wires and AC double platinum plugs. We did 7 pulls on the dyno and after tuning put up 427 hp/431 lbs. The heads are only good to about 6200rpm then the numbers really drop off. Feel free to drop me an email if you have any questions.
Hope this helps...
Jerry
Hope this helps...
Jerry
Thread Starter
Pro
Joined: Jun 2005
Posts: 725
Likes: 1
From: FL.
I found an article at chevy Hi- Performance on the new vortec small port heads including the dyno chart numbers.
http://chevyhiperformance.com/techar...ec/index1.html
http://chevyhiperformance.com/techar...ec/index1.html
