#Aluminum head porting kit registration#
#Aluminum head porting kit code#
#Aluminum head porting kit plus#

For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required.

Boosted/Nitrous Applications - We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications.

Stud Girdles - Due to many available factory OEM and aftermarket style/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles).

Mills - Flat or angle mills could affect flow numbers and might require a thicker intake gasket.

Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. Check pushrod clearance with heads placed on the block before final assembly.

Pushrods - Different length pushrods might be required, always check pushrod length.

Your block manufacturer or engine builder can recommend oil restrictions to the top end/valve train components.

High Volume/Pressure Oil Pumps - If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption.

#Aluminum head porting kit code#

Bar Codes - Please keep the bar code & paperwork shipped with your head, these contain all the specs for your heads when calling AFR.

General Recommendations for AFR Cylinder Heads:.

For applications above these limits shaft mount rockers are typically advised.

For ideal geometry and wipe pattern AFR strongly recommends AFR stud mount rockers part #6043 for applications below 7400 RPM and.

It is the customers responsibility to verify proper piston to head clearance. Our combustion chamber shapes are very critical to flow and altering the cylinder head can adversely affect flow and power production. AFR strongly recommends material be removed from the piston and not the cylinder head. Most of the newer designed dome profiles will clear.

With some domed aftermarket pistons, it may be necessary to slightly clearance or modify the piston due to our more efficient heart shaped combustion chamber design.

If you grind or lap in the valve, the coating is removed and the seating area on the valve seat will wear prematurely reducing the service life substantially. YOU CANNOT GRIND, REFACE OR LAP IN THE 45 DEGREE SEAT AREA.

#Aluminum head porting kit plus#

This is the same coating GM uses in the LS7 ZO6 applications and is designed to last 50,000 plus miles. If you have upgraded to AFR Titanium valves in SB Chevy, SB Ford or BB Chevy applications they are coated with Chrome Nitrate (CrN) on the stem and seat area for longevity purposes. Test conducted at 28' of water (pressure) on Superflow 600Д«ore Size: 4.600', 3/4' radius plate exhaust, 2 1/8' curved pipe Included ComponentsДЎ1/32' Intake Valve, 2.250' x 5.500' O.A.L 315cc Aluminum BBC Cylinder HeadsД¬lick part # to add product to your cart 315cc Competition Flow Chart

#Aluminum head porting kit registration#

VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY.

Please see footnotes for additional information. AFR heads are available bare (without parts), call our tech line for details. Recommended for aggressive street, or street/strip builds with displacements up to 540 cubic inches, operating up to 6800 RPM. AFRвЂ™s 315cc heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout.