cratemotor class questions
 

Hello all Few questions about crate motor cars I know not many fans of them on here but I will ask anyway. where do you find the right shipping weight of car to figure out class I have a 1989 camaro convertible.I'm looking to build a 350 fastburn motor. anyone have part numbers for accepted pistons and can I run the aluminum GM vortec heads ?

thank you in advance

Re: cratemotor class questions
 

From the IHRA website. Under "Class Racing". To figure car weight, use the NHRA class guide, factor for the crate motor HP.

good luck,
Robert Swartz

INTERNATIONAL HOT ROD ASSOCIATION
TECHNICAL INFORMATION FORM
MAKE: _________Chevrolet_________________ DATE RELEASED: _________1/3/01________________
BRAKE H.P. & DISP: ___350ci / 385hp______ MODEL YEAR: ___00/01________OPTION #:_” fast burn”_
BORE & STROKE: ___4.00 X 3.480____________ CAMSHAFT P/N: _____101185071__________________
COMPRESSION RATIO: NOMINAL _10.1_____ LIFTER TYPE: ______hyd. roller________________
MAX: ____________
Aluminum 1.6 T/STK
CYL. HEAD VOLUME: _____210 cc__________ ROCKER ARM RATIO: ____steel 1.5____________
HEAD GASKET THICKNESS: ___.035 total____ NOTE: Timing and lift specifications must be those
(compressed) found at the valve when checking clearances
DECK CLEARANCE (MIN): ___.035 total______ are set as specified below. On hydraulic cams
(above or below) give clearances to be used when checking MINIMUM
COMB. CHAMBER VOL: ______61 cc________ cam with solid lifter.
(max. comp. ratio may not be exceeded)
PISTONS: TIMING: INTAKE EXHAUST
DESC: (flat,dish, dome) __gm 10159436_____ CHECKING CL: ____0____ _____0____
DISPLACEMENT OF DISH, DOME: _____________ OPENS: ____________ _____________
HEIGHT OF DOME: __________________________ CLOSES: ____________ ____________
DEPTH OF DISH: _______4 valve reliefs__________ OVERLAP: ____________ ____________
WEIGHT OF PISTON W/PIN: ______550 gr ______ DURATION: ____________ ____________
.525 T/STK .525 T/STK
LIFT: ___.474_____ ____.510____
CYLINDER HEAD: VALVES:
CASTING NUMBER: __12367713_PN 12464298_______ HEAD DIAMETER: ___2.00_____ ____1.55___
12367712
MATERIAL: _________alum______________________ ANGLE OF SEAT/FACE: ____45____ _____45____
INDUCTION: SPRINGS:
TYPE: ______________single 4 bbl________________ OUTER CLOSED: ______ Double with damper__________
1.550 OD
MAKE: ________________________________________ OUTER OPEN: ___________________ ___________
INNER CLOSED: _________________ ___________
INT. MAN. CASTING #: __________________________ INNER OPEN: ____________________ ____________
MATERIAL OF INTAKE: _____cast alum___________ Accepted Pistons: L2256 TRW, 69578 Ross
__CP 18_ CP___
CARB OR FUEL INJECTION: _____750 cfm_________