The heads flow. Johnsongrass has the range but to narrow it down if you want to get things flowing decent it's going to cost you around $500 to $800 for that type of head. An AFR type head I've invested up to $1500..
Then, what are the benefits of porting and polishing a head?
Porting and polishing Larger ports flow more fuel/air at higher RPMs but sacrifice torque at lower RPMs due to lower fuel/air velocity. A mirror finish of the port does not provide the increase that intuition suggests.
Likewise, how much HP do ported heads add? Porting the heads will definitely help airflow. You will gain 25 HP over the stock setup.
Besides, how do you port and polish heads?
To port the exhaust side of the engine the steps are very much the same. Step 1: Scrub the mating area. Use Scotch-Brite pad to scrub the area where the cylinder head mates with the exhaust gasket down to bare metal. Step 2: Paint the perimeter of the exhaust runner with machinist red or blue.
Are 243 heads better than 241?
No. The 243 heads as used on the LS2 motor flow at 260 CFM on the intake. LS6 243s (CNCed) with sodium filled valves flow a little better at 280 on the intake. The stock 241 head flows at 220 on the intake.
Related Question Answers
Does porting intake manifold work?
Increase the flow of fuel and air running through the intake manifold and the heads and you just increased the engine's power output. Head and intake manifold porting can be a very complex task. Bigger is NOT always better when it comes to flow and porting. It's all about shape, flow and velocity.Do cylinder heads increase horsepower?
Needless to say, the cylinder head is a major component in building horsepower and torque. Because the way the shape and size of the combustion chamber affects so much of an engine's operation, you have to choose the appropriate selection, not just the one with the best peak numbers.Does intake manifold increase horsepower?
The stock intake manifolds on most model mustangs are designed to be more functional than powerful. Upgrading your intake will not only increase horsepower, it can also change the rpm range at which the most horsepower is created.Is porting a turbo worth it?
Porting basically enlarges the inlet/outlet of the turbo. Performance difference is going to be negligible. Not worth the extra coin IMO.Should intake ports be polished?
a) The Intake side shouldn't be polished because a polished smoothed surface will lower velocity. b) The area highlighted(divider) is important to be left as is on the intake side to maintain port velocity. polished intake ports are bad also because it causes the fuel to puddle and doesnt atomize as good.How much does it cost to port a manifold?
Stage II: $250 Suggested porting for most intakes. Includes port matching and blending of the plenum and its dividers. Stage III: See below for pricing Complements any head porting for maximum horsepower. Includes full porting and polishing of the inside of the intake manifold.Does port and polish add HP?
Re: How much Hp would a port and polish give? (The port and polish in and of itself won't make large power gains. Especially on the SOHC d16. Now, once you've done the p&p and opened up the motor so it can breath and exhale better (intake, header, exhaust) you'll notice more significant gains than without the p&p.What is port and polish throttle body?
Video tutorial on how to port and polish a vehicle's throttle body. This is a very small horsepower increase depending on the design of your engine, but it will improve throttle response and reduce the amount of oily residue build up.What is gas flowing a cylinder head?
Gas flowing cylinder heads is a scientific phenomenon that can literally be applied to any internal combustion engines cylinder head and or inlet system.Can you port exhaust manifolds?
Porting the exhaust manifold on a car is a great way to optimize the performance of the engine. However, tuners and engine builders have been porting exhaust and intake manifolds for many years as a method of optimizing airflow and increasing an engine's horsepower.How does a cylinder head flow bench work?
A flow bench consists of an air pump of some sort, a metering element, pressure and temperature measuring instruments such as manometers, and various controls. The test piece is attached in series with the pump and measuring element and air is pumped through the whole system.How much does CNC porting cost?
Engine > How much does it cost to have a set of heads ported and polished? Ranges from an average of 10-75 horsepower and will cost from 150-2500 dollars.Does port and polish really work?
Port and polish work helps the engine to make more power in three different ways. These faster speeds not only allow the engine to breathe easier, they also help the fuel to mix with the intake air more completely once inside the cylinders, which increases burn efficiency.What is ported and relieved?
“Ported” means taking a small grinder and a steady hand to remove extra material inside the intake manifold and exhaust passages to improve breathing. “Relieved” is a similar process, but around the valve seats themselves.What is port and polish motorcycle?
The port and polish basically makes it easier for air/fuel to flow into the combustion chamber and gasket matching permits a greater volume. ( more gas and air equals bigger/more powerful explosion equals more torque and horsepower)What are 243 heads off of?
The 243 head is the 01+ LS6/LS2 head. It has a smaller 64.45cc chamber for more compression (10.5 CR on LS6), 210cc intake runners, and 75cc D-shaped exhaust ports. All three came with 2.00" intake valves, and 1.55" exhaust valves.What LS engines came with 243 heads?
LS Head CastingsThe 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6's 243 heads, but had 6 cc larger combustion chambers.What are LS 241 heads?
The 241 heads, compared to the 706 heads, offered larger 68cc combustion chambers, which meant a drop in compression of roughly 0.70 points. In. Ex. According to Internet folklore, the 317 heads used on the 6.0L truck engines share the intake port design with the 799 (243) heads.Are 799 and 243 heads the same?
The 799 and 243 are virtually the same head. ls2 had 243's and it was a 6.0 correct? 
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