Enginequest IMCA/WISSOTA Small Block Chevy Cylinder Heads

#9154622

Enginequest IMCA/WISSOTA Small Block Chevy Cylinder Heads

Name: Enginequest IMCA/WISSOTA Small Block Chevy Cylinder Heads
Brand: Speedway Motors
SKU: 9154622
Rating: 4.4 (8 reviews)

8 Reviews

33 Questions

This head is engraved with IMCA logo and serial numbered by Engine Quest to make it approved for use in IMCA classes that allow the CH350I cylinder head
76 cc combustions chamber and 176 to 178 cc intake runners deliver consistent performance
COMP version (Complete assembled) includes stainless steel valves, performance valve springs, retainers, keepers, and 3/8" screw in studs

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Product Summary

This head is engraved with IMCA logo and serial numbered by Engine Quest to make it approved for use in IMCA classes that allow the CH350I cylinder head
76 cc combustions chamber and 176 to 178 cc intake runners deliver consistent performance
COMP version (Complete assembled) includes stainless steel valves, performance valve springs, retainers, keepers, and 3/8" screw in studs
SM version (Sport Mod) also has upgraded Isky valve springs part number 450235D and lightweight Ferrea tool steel retainers
SC version (Stock Car) also has upgraded Isky valve springs part number 450235D, lightweight Ferrea tool steel retainers, and max flat milled w/ intake surface corrected

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Key Specs

Cylinder Head Style	Select Model
Material Type	Cast Iron
Finish	Natural
Combustion Chamber Volume	76cc
Intake Runner Volume	176/178cc

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Installation Details

Installation Tips

This cylinder head in stock form has push rod slots in the head similar to a stock GM cylinder head, therefore, no guide plates are needed or utilized. If guide plates are added or utilized, you will need to drill out the pushrod slots for clearance purposes to allow for the push rod guide plate function.

Assembled version will include the following:

COMP - Utilizes Speedway valve springs 180-671515 and 915-39741 retainers.

SM - The Sport Mod version has upgraded Isky valve springs 450-235D, tool steel retainers and spring locators.

SC - The Stock Car version has the same Isky valve spring components as the SM unit and also has been surfaced to max out the compression rule for the IMCA Stock Car.

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Details

This head is engraved and serial numbered by Engine Quest for IMCAs Sport Mods, Stock Cars, and Hobby Stocks. Now approved for WISSOTA Midwest Mods and Street Stocks.

Assembled heads will include the following:

3/8" screw in studs # 915-99156
76 cc combustion chamber
176-178 cc intake runners
Straight plug
1.94/1.50 intake/exhaust valves #910-14140-1 & 910-14145-1
Available bare or assembled and blue printed
Heavy duty valves
(COMP) version includes Retainers and locks # 915-39741 & 577-555
(COMP) version includes 1.25" high-performance valve springs # 180-671515
(SM-Sport Mod) version includes Isky Springs # 450-235D, 7 deg locks and Ferrea tool steel retainers
(SC-Stock Car) version includes Isky Springs # 450-235D, 7 deg locks and Ferrea tool steel retainers, Max Flat Milled w/ intake surface corrected
Three angle valve job

Item Details

Straight Plug
1.94/1.50 Intake Valves

IMCA Approved.

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA Prop 65

CARB warning

Specifications

KEY SPECS
MFG. Part #	Select Model to see
Brand	Speedway Motors
Cylinder Head Style	Select Model to see
Material Type	Cast Iron
Finish	Natural
Combustion Chamber Volume	76cc
Intake Runner Volume	176/178cc

GENERAL
Combustion Chamber Volume Range	70cc - 79cc
Intake Runner Volume Range	170cc - 179cc
Spark Plug Style	Straight
Intake Port Shape	Rectangle
Exhaust Port Shape	Square
Intake Valve Diameter	1.94"
Intake Valves Included	Yes
Exhaust Valve Diameter	1.5"
Exhaust Valves Included	Yes
Valve Spring Included	Yes
Valve Seat Machine Style	3-angle
Valve Seats Machined	Yes
Locks Included	Yes
Lock Style	7 Degree
Retainers Included	Yes
Retainer Material	Steel
Stud Diameter	0.38"
Notes	-Manufactures recommends using R5673-8 NGK or equivalent spark plugs. (373-133 or 373-134 Autolite). -Item expected to be on back order until March 2020
Sold in Quantity	Each