xxiamdrewxx

Just curious and bored anyone ever seen a 572 street legal 3rd gen? if there hasn't been one that's definitely on my list in the future when I'm an old geezer post some pics if you have seen one tho

Air_Adam

Any 3rdgen with a BBC, regardless of size, is technically not street legal, as the BBC was never an OEM engine in one of those cars, or anything newer.

Now... the "street legal ones" as in, they have plates on them, I have seen in the generic sizes... 396, 454, 496.. not anything that big though.

AlkyIROC

Depends where you live. Some places don't care what engine is under the hood to be street legal. It depends on your local emission laws.

As for the swap, a 572 is a tall deck block. Although it can fit, there are a lot of clearance issues in the swap. The taller deck makes HVAC clearance very close. Off the shelf headers will not fit. It's hard enough getting headers to fit with a short deck block and heads with raised exhaust ports.

Anything is possible with enough time and money but don't expect it to be an easy, cheap swap. It's a lot easier to stick to a short deck block and making a 540, 555, 565.

If you want to use a tall deck, why stop at a 572. A 632 is the most common big engine now.

Without knowing exactly what the engine is, anyone with a BBC under the hood can tell you it's a 572 and you would have to believe them.

Darkshot

iTrader: (4)

Tampering with emissions controls is a federal offense...just happens to be nobody to enforce them in many areas.

scorpiusx

I would like to know if shoehorning a 572 BB Chevy into a Third Gen Camaro requires adapting, moving, modifying the motor mounts, or whatever else is required (oil pan swap etc.), to mount it so it doesn't stick out above the hood. I was watching Texas Metal, and they were installing a 572 into a Chevelle, and had to add a hood scoop for clearance.

dmccain

iTrader: (2)

Major undertaking. Small blocks can do anything you want them to do powerwise, they are lighter, and they fit. So why?

Orr89RocZ

iTrader: (20)

nitrous or boost assist i agree. If wanting NA power, 800+ hp bbc is easier and cheaper to do than any sbc.


old thread but imo keeping it under factory hood will be difficult unless you get a low rise custom sheet metal intake manifold for efi, that way it will stay under. They fit just fine everywhere else. Idk what old pan fits stock kmember. So my suggestion is go tube kmember and ideally ditch engine mounts and go front plate mid plate. Frees room for the headers that need to be big if you want big cubes and power

scorpiusx

I'm old school...Noth'n like a BB Chevy Wedge with axle twisting torque, 125db Hooker headers, and glass-packs!!!

sofakingdom

iTrader: (1)

572 requires a tall deck block.

A std deck block already has enough trouble fitting in one of these cars. Wiper motor, brake booster, etc. As well as hood clearance.

Yes of course you'd need the right oil pan to fit the chassis (duh), exhaust, and so on.

So yeah, major undertaking.

No glass packs please. These cars already have a bad enough reputation for being owned by ... people with necks of a certain color, whether universally true or not; please don't add to it.

A junkyard LSx motor, let's say a 6.0 or 6.2, with a blower will make FAR more torque than a big block (unless of course similarly boosted), and will fit the car better.

At some level, "old school" just turns into, pig-headed stubbornness. Not that the big block isn't a good motor and all that; just, there's places it makes sense, and places it doesn't.

scorpiusx

Yes found it: LSX-Series Gen-IV Small-Block V-8 454CID https://www.chevrolet.com/performanc...es/lsx/lsx-454

• Part Number: 19355573
• Engine Type: LSX-Series Gen-IV Small-Block V-8
• Displacement (cu. in.): 454 (7.4L)
• Bore x Stroke (in.): 4.185 x 4.125 (106.3 x 104.8 mm)
• Block (P/N 19260099): LSX cast-iron with six-bolt, cross-bolted main caps
• Crankshaft (P/N 19244018): 4340 forged steel with eight-bolt flange
• Connecting Rods (P/N 19166964): 4340 forged steel
• Pistons (P/N 19166958): Forged aluminum
• Camshaft Type (P/N 19166972): Hydraulic roller
• Valve Lift (in.): 0.648 intake / 0.648 exhaust
• Camshaft Duration (@0.050 in.): 236° intake / 246° exhaust
• Cylinder Heads (P/N 19354239): Aluminum LSX-LS7 port; with “as cast” 70-cc chambers
• Valve Size (in.): 2.200 titanium intake / 1.610 hollow, sodium-filled exhaust
• Compression ratio: 11.0:1
• Rocker Arms (P/N 12579615 int): Investment-cast, roll trunnion
• Rocker Arms (P/N 12579617 exh): Investment-cast, roll trunnion
• Rocker Arm Ratio: 1.8:1
• Recommended Fuel: Premium pump
• Maximum Recommended rpm: 6500
• Reluctor Wheel: 58X
• Balanced: Internal