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Big Chief 14 degree Oval Port - Full CNC, Bare

$3,275.00

Big Chief 14 degree Oval Port CNC

PN: 18275070

Fully CNC Ported, BARE Cylinder Heads, priced for EACH (2 needed)

Intake Port: 440cc Rect Port

Material: Aluminum

Chamber Size: 74cc or 85cc

Valve Size: Up to 2.40/1.90"

Maximum Pro Mod, Pro Street, Top Dragster& Top Sportsman Competition, excellent with alcohol & nitrous; Rectangular Port Design over 8000 rpm, over 500 ci

Dart

14 Degree Big Chief Aluminum Cylinder Head

Part#

18100000 thru 18300000

Material:

355T6 alum alloy

Comb Chambers:

75cc as cast (82cc Tit, 87cc SS w/CNC)

Intake Valve Dia:

2.400" std up to 2.500"

Intake Port volume:

395cc as cast, FP CNC - 440cc Capable of 475cc +

Intake Port Dim:

1.840" x 2.480" (as cast), , 1.890"w x 2.530"h (F/P)

Int Port Location:

Raised 1.500" Spread ports

Intake Gasket:

Fel-Pro# 1298 / Dart# 65124101

Exh Valve Dia.:

1.900" std

Exh Port volume:

170cc (as cast), 185cc (F/P)

Exhaust Port Dim:

(As cast) 1.720"w x 1.680"h, (F/P) 2.100"w x 1.800"h

Exh Port Location:

Raised .900" Std chevy bolt pattern

Exhaust Gasket:

Mr Gasket 5914

Flow, Intake:

(F/P) 480 cfm @ .900" lift/28"

Flow, Exhaust:

(F/P) 341 cfm @.900" lift/28"

Manifold:

Dart Big Chief (opening-1.75"x 2.35") 4 bbl = 8" / Tunnel Ram = 10" tall

Milling:

Min. 79cc / .020" max (.006" = 1cc) Flat mill only.

Pistons:

Must use pistons for 14° Big Chief head.

Push Rod length:

Should always measure

Retainers:

Titanium 10°

Spark Plug:

.750" reach, gasketed. Autolite AR3932

Spring Cups:

1.625" - .035 cup

Spring Pockets

1.740" OD for 1.625" cup (.030" deeper max)

Springs:

optional triple: 1.625T = 330# @ 2.100" / .910" max Comp 948

Our Assembly: 1.625D = 250# @ 2.000" / .790" max Vasco-Jet H-11

Valve Angles:

Int - 14°, Exh - 7°, 4° cant

Valve Length:

Int - 6.600" Exh – 6.450"

Valve Stem Dia:

.3415" - 11/32"

Valve Train:

Jesel or T&D 14° rocker system

Valve Guides:

1/2" OD Mag - bronze Cut for .530" PC seals (.002" press)

Valve Guide length:

3.000"

Valve Guide clearance:

.0014" - .0021" (with our .3415 dia. valve stem)

Valve Guide Spacing:

Widened for use on min. 4.400"- 4.625" bore

Valve Seats:

Ductile Iron, .006" press

Valve Seat dim, Int

Program #3815 & #384 - 2.520" x 2.00" x .375" / Program #385 - 2.570"

Exh

2.000" x 1.600" x .375"

Valve Seat angles:

Int = 32° - 45° - 60° - 70° Exh = 37° - 45° - radius

Studs, head:

Must use Big Chief stud kit #66120015

Titanium Valves

Must use lash caps

Torque

Manifold = 35 ft/lb

: w/oil Head Bolts = 70 ft/lb Dart’s inner head studs 3/8-7/16 = 50 ft/lb

Block Use:

Mark IV, Gen V, Gen VI with proper head gasket

Weight:

42 lbs

Add to Cart:

  • Model: 18100000
  • Shipping Weight: 90lbs
  • 100 Units in Stock
  • Manufactured by: DART


This product was added to our catalog on Monday 25 April, 2005.