CHI 3V 208CC FORD 351C 393 408 Cleveland Boss Alloy Cylinder Heads PAIR 67cc

CHI 3V 208cc Ford Cleveland Cylinder Heads.  67cc Chamber

BARE PAIR - NO PARTS

The CHI 3V 208cc cylinder heads are the street series in the 3V range of Cleveland cylinder heads. Developed by Dave Storlien for the 2004 Engine Masters Competition, the 208cc runner was originally designed to produce the best average torque and horsepower on a 410ci engine up to 6500rpm

Dyno testing has shown them to be the best choice for standard 351 stroke motors looking to make between 500 – 550hp, as well as strokers making between 550hp, to high 500’s with solid camshafts. The 208cc Cleveland Heads will provide the best spread of torque and horsepower at these power levels. Mild solid roller and hydraulic roller cams in these combinations will result in increased outputs again.

The CHI 208cc features a minimum cross section of 2.3”. The intake port roof height is the tallest of our 3V cylinder heads and requires its own 3V 208 intake manifold. With a modest decrease of 15ccs (from our 223cc heads), and with only a .100” change in minimum cross section, we have managed to extract over 320cfm from our new 208cc intake port without hurting the all important low lift numbers.

Again the emphasis was on keeping the port as small as possible whilst increasing airflow as much as possible. Again we have another first in the Small Block Ford – Cleveland cylinder head market as no other cylinder head has the same airflow per CC of runner volume. The extra tall port roof also gives this intake port the most generous short turn radius of all our 3v heads, and again the emphasis was on maintaining the exceptional wet flow characteristics all our 3V heads exhibit

Chamber Size:  67cc

Intake Port Runner:   208cc

Exhaust Port Runner:

Intake Valve:  2.070" x 5.300"

Exhaust Valve: 1.650" x 5.070"