What CC are 781 heads?
The 781 heads have 256/114 cc port size runners, with 118cc combustion chambers. The 049 heads have 255/119 cc port size runners, with 122cc combustion chambers. It’s really a toss up on which ones to use as the 049’s flow more but the 781’s will give a little more compression.
What year is a Mark V 454?
Here’s a pristine Gen V 454 from a 1990 Chevrolet 454SS pickup. Gen V, introduced in 1991, included a superior one-piece main rear seal, new oiling passages closer to the cam, and all blocks received four-bolt mains.
What is a 454 peanut head?
For the uninitiated, peanut port refers to the small, oval-port heads used on the Gen-V 454 truck motors run prior to the introduction of the Gen VI in 1996. In addition to the less-than-ideal, peanut-port heads, the Gen-V motors were also saddled with hydraulic flat-tappet cams.
How can you tell a BBC engine?
The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. All Big Blocks are stamped there. Small Blocks are stamped on a pad in front of the passenger side cylinder head and are often covered by the alternator.
Where can I find flow numbers for bmfheads?
Most flow numbers for BMFheads come from their Web Siteupdated Aug. ’09. Most flow numbers for BRODIXheads come from their ’98/’04/’06/’08 Catalogs. Some from theirWeb Siteupdated Aug. ’12. All flow numbers for Bullet Cylinder Headscome from their Web Siteupdated Dec. ’09.
What are flow numbers for CCH cylinder heads?
Most flow numbers for CCH — Canadian Cylinder Head Technologiesheads come from their Web Siteupdated Oct. ’08 — and were converted from 25″ to 28″. Some flow numbers for Chad SpeierHeads come from their Web Siteupdated July ’14.
How much does cylinder head flow data cost?
Our Combination Package Pay Regular Price for and get 50% OFFon FLW /DFW files. Price $67.40- Add $5.95- $10.95 International for shipping and handling if you want a CD-ROM. Online Purchasing Cylinder Head Flow Data at 28 Inches of Water