WHAT WOULD YOU DO TO A 454 CRATE MOTOR?

[LIVE4RDO]

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

 

[pontiacgp]

if that is a new engine does it not come with a warranty?

 

[84sbcregal23deg]

250 shot!

 

[GhettoRacingKid]

if i was buying a BBC crate motor i would go with something bigger.

for this, I would bump up the compression, better heads, better flow,bigger cam.

you can get 550hp out of a 454 with no problem.

 

[Kwik_Cutty88]

Biiiiiiiiiiiiiiiiiiigggggggggggggggggggggggggggg cam. 8) Trick Flow Heads, High Flowing Intake.

 

[LIVE4RDO]

The motor is not brand new. It was in my friend's car while he was building his motor. No warranty.

I don't use juice.

How big of a cam I can get to still keep the car street able with A/C and power brakes?

Can I do something to the heads I'm getting with it? Or should I work on the heads I have now: 3964290, oval port, closed chamber, 109cc?

 

[Kwik_Cutty88]

The motor is not brand new. It was in my friend's car while he was building his motor. No warranty.

I don't use juice.

How big of a cam I can get to still keep the car street able with A/C and power brakes?

Can I do something to the heads I'm getting with it? Or should I work on the heads I have now: 3964290, oval port, closed chamber, 109cc?

well already with the cam that you have listed you are gonna have break problems. i also have a big cam in my car and it was always that you could get a few good pushes out of the pedal and then it would go hard as a rock. to fix that you have to make a vacum canister to store vacum so that the booster will always have it. i can post pics if needed.

 

[beermonkey9417]

id give the 454 sbc to BeerMonkey9417, cuz hes an awesome guy! 😀