WHAT WOULD YOU DO TO A 454 CRATE MOTOR?

LIVE4RDO

Frequent Racer
Jul 21, 2010
678
0
0
Staten Island, NY
Hey crowd. Most likely getting a 454 crate in my Bu. What would you change/improve in it?

This is what I'm getting:

Based on the Gen VI 4-bolt mains with 1-piece rear main seal blocks with approximately 8.75:1 compression, 425 hp at 5,250 rpm and 500 ft./lbs. of torque at 3,250 rpm. The "HO" stands for High Output, which means you get Forged steel externally balanced crankshafts, forged steel LS6/LS7 "Dimple" rods, shot peened and magna fluxed with 7/16 in. rod bolts. Forged aluminum pistons, hydraulic roller camshafts with .510 in. intake lift, .540 in. exhaust lift and duration at .050 in. for intake is 211 and 230 for exhaust, lobe centerline is 112 degrees. Cast iron cylinder heads with rectangular port 118cc combustion chambers, 325cc intake runner volume with 2.19 in. intake valves and 1.88 in. exhaust. These heads are configured for 3/8 in. thread 7/16 in. shank rocker arm studs. Stamped steel self-aligning 1.7:1 ratio rocker arms come installed along with AC Delco spark plugs. Also included with these crate engines; oil pans, black powder coated aluminum valve covers, black powder coated aluminum timing covers, long style cast iron "V" belt rotation water pumps, 8 in. harmonic balancers, and 14 in. automatic flex plates.

454HO Engine Specifications:
Compression ................................................................... 8.75:1
Cylinder Head: ................................................................ Cast iron, rectangular port
Valve Diameter (Intake/Exhaust): ............................... 2.19"/1.88"
Chamber Volume: ........................................................ 118cc
Camshaft:........................................................................ Hydraulic roller tappet
Lift: ............................................................................... .510" intake, .540" exhaust
Duration: ...................................................................... 211( intake, 230( exhaust @ .050" tappet lift
Centerline: ....................................................................... 112( ATDC intake, 112( BTDC exhaust
Rocker Arm Ratio: .......................................................... 1.7:1, stamped steel
Oil Pressure (Minumum): ............................................... 6 psig @ 1000 RPM
..................................................................................... 18 psig @ 2000 RPM
..................................................................................... 24 psig @ 4000 RPM
Recommended Oil: ......................................................... 5W30 synthetic motor oil (after break-in)
Oil Filter: ......................................................................... AC Delco part # - PF 1218
Valve Lash ...................................................................... Torque bolt to 45 ft. lbs.
Fuel: ................................................................................ Premium unleaded - 92 (R+M/2)
Maximum Engine Speed: ............................................... 5500 RPM
Spark Plugs: ................................................................... AC Delco MR43T
Spark Plug Gap .............................................................. .040”
Firing Order: .................................................................... 1-8-4-3-6-5-7-2
 

TRAVIS

Amateur Racer
Feb 1, 2007
227
0
0
MORRISTOWN TN
A good ignition box, good exhaust and carb and about a 150 shot of spray and that thing will live forever. Maybe later on add a different camshaft to up the power but that motor would come to life on a small shot of nitrous.
 

LIVE4RDO

Frequent Racer
Thread starter
Jul 21, 2010
678
0
0
Staten Island, NY
No juice for me. I have a Holley 750 DP, long tube 2241s and 2.5" with Flowmasters. I was thinking about changing the cam.
 

bracketchev1221

Dragway Regular
Apr 22, 2009
1,111
1
0
Mountville Pa
Put a set of small chamber aluminum heads on it. Something with a smaller intake runner as well. Then you can swap the cam.
 

TURNA

MalibuRacing Junkie
Jul 6, 2003
6,028
1
38
Socialist NY
turbo..... wha..................... what , who said that?
 

LIVE4RDO

Frequent Racer
Thread starter
Jul 21, 2010
678
0
0
Staten Island, NY
I don't know if I have room under there for turbo, everything is pretty tight. No? Is that a good compression for turbo?
 

Al

Pro Stocker
May 25, 2003
2,018
0
0
Harker Heights, TX
I've thought of doing the 454 or 502 low compression crate with a procharger or turbo on several occasions. 8.75 is a great CR for that.
 

LS6 Tommy

MalibuRacing Junkie
May 15, 2004
15,847
1
38
North Jersey
I wouldn't go to a bigger cam unless you can get the compression up a bit, maybe 10:1. It'll still run in pump gas...

Tommy
 

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