AFR 220cc RUNNERS 75cc CHAMBERS ELIMINATOR ALUMINUM HEADS. Angle Plug. FULLY CNC'd
AIR FLOW RESEARCH
This sale is for a fully assembled set of heads (2 heads).
The springs in this setup operate with hydraulic roller cams up to .600 lift.
READY TO INSTALL.
This ad may have references to pictures and graphs that are not visible in the description. To see this ad in it's complete form click the "buy it now" tab. This will not in any way commit you to buying the product. It will bring you directly to this ad in its entirety on our actual website. You will then see the ad displayed with all the pictures and dyno graphs throughout the ad in great detail.
PICTURED ABOVE ARE OUR FULLY CNC'D AFR HEADS.
The AFR heads are the best aftermarket cylinder heads in the world. Quality, performance, and reliability are excellent.
The information below pertains to our testing with the AFR 220 heads. This sale is for a set of 220cc heads setup for hydraulic roller cams. From what we have seen on the flow charts, the 220cc heads do slightly edge out the 210's but not by much. We suggest using the 220cc heads on very aggressive setups coupled with cams in the 600 lift or more range, with higher amounts of duration than what is common in most street rods. These heads will most likely prevail when run hard. We have not done any testing yet on the 220's but they are sure to make excellent power. These heads may be on the larger than needed side for most hyd. roller cam builds, but should you ever decide to increase your cam and or cubic inch on your engine, you would not be outgrowing the 220cc heads for certain.
As our company founder explains it, the results you experience with the AFR heads will vary greatly by what type setup you are running. The engine combos we have dynoed are what most people have chosen to use as far as cam and intake selection goes, and we have some of the results listed below. The engines dynoed with the 220cc heads were mostly sbc 421, 427, and 434 engines in the 10:1 to 10.5:1 compression range, give or take. We also did an aggressive 406 build with the 210 heads. Normally, we use the 195cc heads on the 406 but found the 220's suitable due to the cam size of this one particular engine. All run on pump gas.
Our 421 through 434 engine ads have a selection of four different cams and these engines all come with AFR heads. This has given us a great opportunity to see how they performed. We were able to test several different cam setups with these heads. This will give you an idea on what these heads are capable of with a given combination of cam, intake, rockers, and carb. This may also help you select a proper cam for your build.
We feel the 220cc AFR heads would perform very well on a medium to aggressive 421, 427, or 434 build or a somewhat Pro-street 406. As mentioned, below is just an excerpt from our 421-434 ads. If you're using a lower lift than those listed below, then it would be fair to say the hp will drop, but not by much, providing your lift and duration are somewhat close to any of the cams mentioned below. This will give you an idea of what kind of power to expect with these heads, and it can certainly help you choose a cam and intake.
Please do understand that a cam is not included with the heads. This is just a guide to show what you may expect with a given combination when building your engine.
Special Grind # 13459
PART NUMBER: 12-000-8-11321
110 lobe sep.
Comp Cams SBC Xtreme Energy Hydraulic Roller Camshafts.
Official Dyno results using this cam in a 434 engine with a Q-950 carburetor and an MSD distributor with AFR heads.
Official Dyno report on our 434 engine with this cam, single plane intake, 1.6 rockers, Brawler 950 carburetor, AFR heads, and an MSD distributor.
An excerpt from our engine ad about our new dyno.
As of 9/15/2013 we have completed installation of our brand new Super Flow 902S dyno. In the past, we have outsourced our dyno work. Never being able to do the research and development we truly wanted, prompted us to make the $105,000 investment. Needless to say, it's been the best investment we have ever made. Every aspect of our engines can now be monitored, calibrated, and tuned. Best of all, we can see what combos make the best power, with consideration to drivability.
One thing we have noticed is that the de-tuned engines with different cam and intake combos certainly do have less top end horse power, as expected, but the torque increase in the low rpm range is much greater than the higher horse power setup. This increase in torque down low is what you want if you're sporting around on the street, rather than all out racing. The de-tuned version of our engines will also allow you to set the car up closer to stock and increase drivability to a very high degree. Throttle response is also noticeably better.
One of the worst mistakes you can make building up an engine is to get a mismatched combination of parts. We know about combinations and how they work. Take a test drive in a car with over 400hp vs. a 300hp or less and you will then see what youâ€™re missing. The exhaust sound under load is very pleasing. We are very pleased with everything about the AFR heads. Few if any of the others know much about the correct way to setup a set of cylinder heads.
Accessory Bolt Holes Drilled
CNC-Machined Combustion Chamber
CNC-Machined Exhaust Runner
CNC-Machined Intake Runner
Combustion Chamber Style
Combustion Chamber Volume (cc)
Cylinder Head Finish
Cylinder Head Material
Cylinder Head Style
Damper Spring Included
Exhaust Port Location
Exhaust Port Shape
Exhaust Runner Volume (cc)
Exhaust Valve Angle
Exhaust Valve Diameter (in)
Exhaust Valves Included
Guideplate Pushrod Size
Intake Port Location
Intake Port Shape
Intake Runner Volume (cc)
Intake Valve Angle
Intake Valve Diameter (in)
Intake Valves Included
Machined for O-Ring
Maximum Valve Lift (in)
Not compatible with self-aligning rocker arms.
Number of Springs Per Valve
Outside Diameter of Outer Spring (in)
1.290 in. std pressure # 8017
Sold as a pair.
Rocker Arm Nut Thread Size
Rocker Arm Nuts Included
Rocker Arm Studs Included
Rocker Arms Included
Spark Plug Style
Steam Holes Drilled
Valve Cover Mounting Style
Valve Guide Material
If you have any technical questions about these heads or if you need to know if they are right for your application, feel free to contact us with your question.
For overseas shipping quotes, contact us using the contact seller tab.
We are not responsible for collateral damage caused by the use of this product.
Should a problem occur, please contact us. If a return is necessary, please contact us for an RGA number and return authorization. The RGA number must be included on the return label. If an item is returned without an RGA number, it will not be processed. A full description of what the problem is needs to be included with any returned product with your contact info, and proof of purchase. Even though you may have explained the problem to us, and been granted permission to return the product, we must have a written explanation and a contact number included with the product. It is also recommended that you include the name of the person from our company that you have been in contact with. You must send the item back to us in a trackable manner (USPS Priority Mail, FedEx, etc.) and keep the tracking info of the returned product. Please give ample time for returns to be processed. Following these guidelines will make the return process work as it should.