How many cubic inches is a N*?
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Northstar Engines and System Technical Discussion Discussion, How many cubic inches is a N*? in Cadillac Engine Technical Discussion; How many cubic inches is the Northstar? In my owners manual it says 279 but whenever I do a parts ...
  1. #1
    STS127 is offline Cadillac Owners Fanatic
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    How many cubic inches is a N*?

    How many cubic inches is the Northstar? In my owners manual it says 279 but whenever I do a parts search on a website it will say 281. Which is it?

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    ewill3rd is offline Cadillac Technician
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    Re: How many cubic inches is a N*?

    I wouldn't call this gospel, but the conversion factor I always used is Liters times 61.02 = cubic inches.
    It works mostly, but it is not anything scientific.
    That would put the N* at just over 280.

    An online volume calculator that I found says :4.6 liter = 280.709221649 cubic inch

    It looks like 281 would be the winner, but it depends on who is doing the math I guess.

  4. #3
    I~LUV~Caddys8792's Avatar
    I~LUV~Caddys8792 is offline Moderator
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    Re: How many cubic inches is a N*?

    I've heard the Northstar is 279 and the Ford 32 Valve 4.6 is 281.

  5. #4
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
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    Re: How many cubic inches is a N*?

    Also keep in mind that the N* technically could be as low as a 4.55 liter engine. Manufacturers round off the number, and are supposed to do so to the nearest tenth. So the conversion for a 4.55 engine is 277 ci.

    Don

  6. #5
    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: How many cubic inches is a N*?

    A northstar has a 3.66" bore and a 3.31" stroke, for a total displacement of 278.6 cubic inches

  7. #6
    Flynn is offline Cadillac Owners Member
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    Re: How many cubic inches is a N*?

    1/2 bore, squared x pi x stroke x No. of cylinders = displacement

    (for you who want the formula for future reference)

  8. #7
    ewill3rd is offline Cadillac Technician
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    Re: How many cubic inches is a N*?

    Sure... then there is that....
    There is a little space in the combustion chambers too.

  9. #8
    AaronZ34 is offline Cadillac Owners Member
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    Re: How many cubic inches is a N*?

    Quote Originally Posted by ewill3rd View Post
    Sure... then there is that....
    There is a little space in the combustion chambers too.
    That has absolutely nothing to do with displacement.

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    Flynn is offline Cadillac Owners Member
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    Re: How many cubic inches is a N*?

    Displacement is defined as the "swept" volume of the cylinders per 1 complete cycle, so that excludes the combustion chambers.

  11. #10
    ewill3rd is offline Cadillac Technician
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    Re: How many cubic inches is a N*?

    Wow, you sure showed me up.

  12. #11
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    Re: How many cubic inches is a N*?

    We have already 10 replies in such a thread .
    No wonder why an oil related thread hit 10+ pages

  13. #12
    1997BlackETC's Avatar
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    Re: How many cubic inches is a N*?

    So 300 hp really is pretty good for a such a small V8, heck too bad they didnt double the cubic inches it would be 600 hp out of a 562 CI motor, lol. Can you imagine the torque it would have, hehehe.

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    Re: How many cubic inches is a N*?

    Engine Mechanical Specifications L37 (VIN 9)
    Application
    Specification

    Metric
    English

    General

    Engine Type
    V-8

    Piston Displacement
    4.6 Liter
    279 cu in

    RPO
    L37

    VIN
    9

    Compression Ratio
    10.0:1

    Compression Pressure at Cranking Speed, Throttle Open
    965-1172 KPa
    140-170 psi

    Power
    224 kW @ 5,600 RPM
    300 hp @ 5,600 RPM

    Torque
    400 Nm @ 4,000 RPM
    295 lb ft @ 4,000 RPM

    Firing Order
    1-2-7-3-4-5-6-8

    Bearings

    Crankshaft, Main, Bearing Material
    Aluminum

    Production Clearance
    0.015-0.055 mm
    0.0006-0.0022 in

    Service - Maximum
    0.0635 mm
    0.0025 in

    Connecting Rod Bearing Material
    Aluminum

    Production Clearance
    0.025-0.076 mm
    0.0010-0.0030 in

    Service - Maximum
    0.076 mm
    0.0030 in

    Camshaft

    Camshaft Material
    Hardened Cast Gray Iron

    Bearing Number
    5

    Bearing Number on Left Cylinder Head Intake
    6

    Bearing Journal Diameter
    26.948-26.972 mm
    1.0610-1.0619 in

    Bearing Bore Diameter, In Cylinder Head
    27.013-27.033 mm
    1.0635-1.0642 in

    Bearing Clearance
    0.051-0.076 mm
    0.0020-0.0030 in

    Production Limits
    0.040-0.090 mm
    0.0016-0.0035 in

    Service Limits - Maximum
    0.090 mm
    0.0035 in

    Runout
    0.050 mm
    0.0020 in

    Out-of-Round
    0.006 mm
    0.0002 in

    Straightness
    0.007 mm
    0.0003 in

    Thrust Width
    22.990-23.090 mm
    0.9051-0.9091 in

    Timing, @ 0.150 mm [0.006 in] Lift, Intake Opens
    0 degrees

    Intake Centerline
    122 degrees ATDC

    Intake Closes
    251 degrees ATDC

    Exhaust Opens
    225.5 degrees BTDC

    Exhaust Centerline
    106 degrees BTDC

    Exhaust Closes
    20.5 degrees ATDC

    Camshaft Lift, Intake
    6.15 mm
    0.2421 in

    Exhaust
    5.94 mm
    0.2339 in

    Valve Lift, Intake
    10.500 mm
    0.4134 in

    Exhaust
    10.000 mm
    0.3937 in

    Duration, @ 0.150 mm [0.006 in] Lift, Intake
    251 degrees

    Exhaust
    246 degrees

    Overlap, @ 0.150 mm [0.006 in] Lift
    2.04 degrees

    Left Intake Water Pump Drive End, Diameter
    15.852-15.902 mm
    0.6241-0.6261 in

    Diameter within last 19.5 mm (0.7677 in)
    15.872-15.882 mm
    0.6249-0.6253 in

    Runout
    0.150 mm
    0.0059 in

    Camshaft Drive

    Primary Drive Type
    Endless Chain

    Adjustment
    Hydraulic, Automatic

    Pitch
    8 mm
    0.315 in

    Width
    Single Row

    Secondary Drive Type
    Endless Chain

    Adjustment
    Hydraulic, Automatic

    Pitch
    8 mm
    0.315 in

    Width
    Single Row

    Connecting Rods

    Diameter, Crankshaft End, Without Bearings
    57.136-57.152 mm
    2.2495-2.2501 in

    Taper, Maximum
    0.005 mm
    0.0002 in

    Piston Pin End, With Bushing
    21.002-21.016 mm
    0.8268-0.8274 in

    Taper, Maximum
    0.007 mm
    0.0003 in

    Without Bushing
    23.453-23.493 mm
    0.9234-0.9421 in

    Width
    21.774 mm
    0.8572 in

    Center to Center
    151.000 mm
    5.9449 in

    Side Clearance, Pair of Connecting Rods on Crankpin
    0.200-0.500 mm
    0.0079-0.0197 in

    Crankshaft

    Journals Crankshaft, Main, Diameter
    64.350-64.366 mm
    2.5335-2.5341 in

    Runout #1, #5
    0.022 mm
    0.0009 in

    Runout #2, #3, #4
    0.025 mm
    0.0010 in

    Round
    0.005 mm
    0.0002 in

    Taper
    0.005 mm
    0.0002 in

    Width, #1, #2, #4, #5
    24.540-24.660 mm
    0.9661-0.9709 in

    Thrust #3, Wall Width
    25.150-25.250 mm
    0.9902-0.9941 in

    Runout
    0.040 mm
    0.0016 in

    Square
    0.010 mm
    0.0004 in

    Crankpin, Connecting Rod, Diameter
    53.947-53.963 mm
    2.1239-2.1245 in

    Round
    0.005 mm
    0.0002 in

    Taper
    0.005 mm
    0.0002 in

    Width
    43.840-43.960 mm
    1.7260-1.7307 in

    End Play, Production
    0.050-0.500 mm
    0.0020-0.0197 in

    Service - Maximum
    0.500 mm
    0.0197 in

    Flange, Engine Flywheel, Face Runout
    0.025 mm
    0.0010 in

    Rear Seal, Diameter
    95.880-95.980 mm
    3.7748-3.7787 in

    Runout
    0.025 mm
    0.0010 in

    Nose Diameter, 0.0-21.0 mm (0.000-0.827 in), From Front Face
    34.500-34.750 mm
    1.3583-1.3681 in

    Runout
    0.100 mm
    0.0039 in

    21.0-53.00 mm (0.827-2.087 in), From Front Face
    34.892-34.912 mm
    1.3737-1.3745 in

    Runout
    0.030 mm
    0.0012 in

    53.00 mm (2.087 in), From Front Face, to Rolled Fillet
    33.450-33.550 mm
    1.3169-1.3209 in

    Runout
    0.100 mm
    0.0039 in

    89.94-110.54 mm (3.541-4.352 in), From Front Face
    44.950-45.000 mm
    1.7697-1.7717 in

    Runout
    0.025 mm
    0.0010 in

    Crankshaft Balancer

    Hub Inside Diameter
    34.847-34.864 mm
    1.3719-1.3726 in

    Outside Diameter, Without Wear Sleeve
    50.730-50.870 mm
    1.9972-2.0028 in

    Runout
    0.100 mm
    0.0039 in

    Cylinder Block

    Material
    Aluminum with Cast-in Grey Iron Sleeves

    Length
    528.45 mm
    20.8100 in

    Cylinder Bore Diameter @ 41 mm (1.6100 in) Below Deck Face
    92.992-93.008 mm
    3.6611-3.6617 in

    Out-of-Round, Production
    0.010 mm
    0.0004 in

    Service - Maximum Allowed
    0.100 mm
    0.0039 in

    Taper, Production
    0.010 mm
    0.0004 in

    Service - Maximum Allowed
    0.100 mm
    0.0039 in

    Piston Clearance @ 41 mm (1.6100 in) Below Deck Face
    0.020-0.051 mm
    0.0008-0.0020 in

    Stroke
    84 mm
    3.3071 in

    Deck Height
    224.55 mm
    8.8406 in

    Clearance - Above Deck Surface
    0.45 mm
    0.0177 in

    Face Flatness - Maximum Allowed
    0.100 mm
    0.0039 in

    Crankshaft Bearing Bore, Mains, Diameter
    72.430-72.442 mm
    2.8516-2.8521 in

    Crankshaft Rear Seal Bore, Diameter
    115.962-116.038 mm
    4.5654-4.5684 in

    Runout - Maximum Allowed
    0.250 mm
    0.0098 in

    Cylinder Head

    Type
    DOHC -- 4 Valves Per Cylinder

    Material
    Aluminum

    Combustion Chamber Volume
    48.6 cc
    2.965 cu in

    Chamber Depth to Surface
    10.470-10.710 mm
    0.4122-0.4217 in

    Flatness, Without Resurfacing - Maximum
    0.050 mm
    0.0020 in

    Resurfacing Amount - Maximum
    0.200 mm
    0.0079 in

    Distance to Camshaft Bore Centerline
    136.000 mm
    5.3543 in

    Inside Diameter
    5.969-5.989 mm
    0.2350-0.2358 in

    Valve Guide-to-Valve Stem Clearance Production, Exhaust
    0.050-0.100 mm
    0.0020-0.0039 in

    Intake
    0.028-0.068 mm
    0.0011-0.0027 in

    Service, Exhaust
    0.120 mm
    0.0047 in

    Intake
    0.110 mm
    0.0043 in

    Valve Seating Surface, Angle
    45.75 degrees

    Width, Exhaust
    1.300-1.700 mm
    0.0512-0.0669 in

    Intake
    0.420-0.820 mm
    0.0165-0.0323 in

    Runout - Maximum
    0.050 mm
    0.0020 in

    Relief, Angle
    20 degrees

    Width, Exhaust
    0.160-0.360 mm
    0.0063-0.0142 in

    Intake
    0.110-0.310 mm
    0.0043-0.0118 in

    Runout - Maximum
    0.050 mm
    0.0020 in

    Undercut Angle, Exhaust
    65 degrees

    Intake
    60 degrees

    Oil System

    Oil Pump Type
    Gerotor

    Minimum Pressure at Normal Operating Temperature @ Idle
    35 kPa
    5 psi

    Minimum Pressure at Normal Operating Temperature @ 2,000 RPM
    250 kPa
    35 psi

    Oil Pressure Recirculation
    Internal Piston Valve

    Oil Filter Type
    PF 58

    Oil Capacity with Filter
    7.098 Liter
    7.5 Quarts

    Without Filter
    6.625 Liter
    7 Quarts

    Pistons

    Material
    Aluminum

    Diameter
    92.957-92.972 mm
    3.6597-3.6603 in

    Taper
    No Taper Measurement

    Pin Bore Diameter
    21.003-21.008 mm
    0.8269-0.8271 in

    Ring Groove Width, 1st Compression, Top
    1.230-1.255 mm
    0.0484-0.0494 in

    2nd Compression
    1.530-1.555 mm
    0.0602-0.0612 in

    Oil Control
    2.530-2.555 mm
    0.0996-0.1006 in

    Inside Diameter, 1st Compression, Top,
    84.720-84.970 mm
    3.3354-3.3453 in

    2nd Compression
    83.260-83.510 mm
    3.2779-3.2878 in

    Oil Control
    85.570-85.820 mm
    3.3689-3.3787 in

    Piston Pins

    Material
    Steel

    Diameter
    20.995-21.000 mm
    0.8266-0.8268 in

    Length
    62.000-61.500 mm
    2.4409-2.4212 in

    Retention
    Snap Rings (2)

    Piston Rings

    Compression
    2

    Oil Ring
    1

    Side Clearance, 1st Compression, Top
    0.040-0.095 mm
    0.0016-0.0037 in

    2nd Compression
    0.040-0.095 mm
    0.0016-0.0037 in

    Oil Control
    None - Side Sealing

    Ring End Gap, 1st Compression, Top
    0.250-0.400 mm
    0.0098-0.0157 in

    2nd Compression
    0.350-0.050 mm
    0.0138-0.0020 in

    Oil Control
    0.250-0.760 mm
    0.0098-0.0299 in

    Rocker Arms, Followers

    Type
    Roller

    Ratio
    1.68 to 1

    Roller Diameter
    17.740-17.800 mm
    0.6984-0.7008 in

    Valves

    Exhaust, Length from Tip to Face OD
    91.730-91.990 mm
    3.6114-3.6217 in

    Head, Diameter
    27.880-28.140 mm
    1.0976-1.1079 in

    Runout - Maximum
    0.380 mm
    0.0150 in

    Chamfer, Angle
    30 degrees

    Width - Minimum
    0.380 mm
    0.0150 in

    Margin Width
    1.070 mm
    0.0421 in

    Face, Angle
    45 degrees

    Width - Minimum
    1.500 mm
    0.0591 in

    Runout - Maximum
    0.038 mm
    0.0015 in

    Valve Stem Diameter
    5.920-5.940 mm
    0.2331-0.2339 in

    Out-of-Round - Maximum Deviation
    0.008 mm
    0.0003 in

    Straightness - Maximum Deviation
    0.013 mm
    0.0005 in

    Intake, Length from Tip to Face OD
    110.600-110.860 mm
    4.3543-4.3646 in

    Head Diameter
    36.090-36.350 mm
    1.4209-1.4311 in

    Runout - Maximum
    0.380 mm
    0.0150 in

    Chamfer, Angle
    30 degrees

    Width - Minimum
    0.380 mm
    0.0150 in

    Margin Width
    0.890 mm
    0.0350 in

    Face, Angle
    45 degrees

    Width - Minimum
    1.000 mm
    0.0394 in

    Runout - Maximum
    0.038 mm
    0.0015 in

    Valve Stem Diameter
    5.920-5.940 mm
    0.2331-0.2339 in

    Out-of-Round - Maximum Deviation
    0.008 mm
    0.0003 in

    Straightness - Maximum Deviation
    0.013 mm
    0.0005 in

    Valve Lifters, Stationary Hydraulic Lifter Adjuster - SHLA

    Type
    Stationary Hydraulic

    Diameter
    11.986-12.000 mm
    0.4719-0.4724 in

    Lifter Bore Diameter, In Cylinder Head,
    12.013-12.037 mm
    0.4730-0.4739 in

    Clearance
    0.037-0.041 mm
    0.0015-0.0016 in

    Valve Springs

    Length Installed
    35 mm
    1.3780 in

    Free
    40.790-43.690 mm
    1.6059-1.7201 in

    Valve Closed
    35 mm
    1.3780 in

    Valve Open
    24.500 mm
    0.9646 in

    Force, Valve Closed
    211.4-233.4 Nm
    47.5-52.5 lb

    Valve Open
    579.0-631.0 Nm
    130.2-141.9 lb

    Diameter Inside
    17.750-18.250 mm
    0.6988-0.7185 in

    Outside
    26.23 mm
    1.0327 in

    Wire, Ovate
    4.110 x 3.280 mm
    0.1618 x 0.1291 in

    Coil Direction
    Clockwise

    Total Number of Coils
    6.90 - 7.10

    there lol......how do you like those apples??????????????

  15. #14
    1997BlackETC's Avatar
    1997BlackETC is offline Cadillac Owners Connoisseur
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    Re: How many cubic inches is a N*?

    Wow, everything I always wanted to know about the Northstar and more

  16. #15
    AaronZ34 is offline Cadillac Owners Member
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    Re: How many cubic inches is a N*?

    Quote Originally Posted by 1997BlackETC View Post
    So 300 hp really is pretty good for a such a small V8, heck too bad they didnt double the cubic inches it would be 600 hp out of a 562 CI motor, lol. Can you imagine the torque it would have, hehehe.
    It really isn't actually. The specific output of the Northstar is actually pretty docile in today's standards. GM is the king of low specific outputs, and has even made a few better than the N*. I just like it for the good design and potential. All aluminum, 4v heads, good OHC design (Unlike its predecessors), and really good EFI. But the factory specific output is not exactly awe-inspiring.

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