What CFM do Vortec heads flow?
230-cfm
He took a set of Vortec right out of the box and clamped them down to his Superflow bench. With 230-cfm max flow, these heads are actually pretty good, except when you notice that peak flow is at . 700 inch valve lift, and no street cams are that big.
What are the casting numbers for Vortec heads?
Vortec cylinder heads have the casting numbers located near the valve springs. 14020555: 1981 305ci, 58cc chambers 1.84/1.50-inch valves. 14020556: 1981 350ci, 78cc chambers, 1.94/1.50-inch valves. 14022056: 1985 350ci, 78cc chambers, 1.94/1.50-inch valves.
Who Makes Pro Comp heads?
PROCOMP SBC 190/64CC COMPLETE ALUMINUM HEADS WITH STUDS & GUIDE PLATES – Shanon’s Engineering Inc.
Is it worth porting Vortec heads?
Your question relates to porting the Vortec heads to improve the flow, which is a great idea. The Vortec heads offer great intake port flow despite the rather small 1.94-inch valves. Where you can gain substantially more power is by concentrating on the exhaust side of the head.
Can you put 350 Vortec heads on a 305?
There’s both 350 and 305 vortecs. Heads from both these engines would physically bolt on to a 305, but bolting a set of 350 heads onto a 305 would hurt performance more than anything. The heads off a 305 vortec are actually pretty decent heads for a 305, and if you’re set on vortec heads, those are the ones you want.
Why are Vortec heads so good?
The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.
Do Vortec heads need guide plates?
Registered. If you want to use guide plates on the SBC Vortec heads they need to be machined to use the plates.
Is Pro Comp any good?
Pro Comp lift kits are really good, but if you’re looking for a premium kit for your Ford, Chevy, Dodge, Ram, Toyota truck or Jeep, then another line of off-road suspension products you should consider are from BDS Suspension.
How much HP will ported heads add?
Porting the heads will definitely help airflow. You will gain 25 HP over the stock setup.
How much horsepower do Vortec heads add?
The original answer was related to modifying the heads to accept more valve lift. Our original answer combined the Chevrolet Hot cam with a set of these Vortec heads. Our estimate then and now is around 350-375 horsepower. Your question relates to porting the Vortec heads to improve the flow, which is a great idea.
How do I get more power out of my 305 vortec?
Bolt-on Upgrades
- Replace the exhaust manifold. The stock exhaust manifold of the 305 engine restricts air flow from the engine increasing back pressure.
- Replace the intake manifold and carburetor.
- Add cold air induction.
- Replace the computer chip.
Can a Vortec head blow a Procomp head?
I have not used any Procomp type heads but the horror stories are abundant on the web. You are right about Vortec heads out flowing them to .500 lift and I am sure with a little time and work those heads could be pretty good, the valve job on those heads blow.
What is part number for 210cc Procomp heads?
I began researching the part number I found 3003 and found some skip white flow data on his CNC chamber ones and they flow less at .500″ and under than my ported Vortec heads that are sporting 1.94-1.50 valves. If you make a 210cc head it better flow some air or the air coming out of it will be slow, not what a street car needs.
What are the flow numbers on Pro Comp heads?
Here is what a set of Pro Comp CNC ported 215cc heads flowed with a 2.05/1.6 valves. The customer used these on turbo motor that made 800+hp according to the timeslips. For the record I have not sold any Pro Comp heads nor am I currently selling any of their heads but I may start.
Can a SBC cylinder head be a street head?
Some of the heads with large flows and big runners are not going to be good street heads, since they will have slow flow through the runners at street rpm. Also if you have a cam with less than .500 inches of lift then the flows at .500 of an inch and above mean nothing to you.