billgiacheri wrote:What the WHAT!!!
http://flint.craigslist.org/cto/5360822583.html
1985 Monte Carlo SS. Kansss Car. Project Street Strip.Siting For Years.All New 468 BBC.Needs To Be Pulled & Freshend up.Great Body Needs Little Body Work Panel Adjustment. Interior Doable New Headliner. 1972 454 Bored To 468 Ci. Full Roller Motor, Solid Lifters, Harland Sharp 615 636 Lift Rockers,Trw Fire Forged Pistons,March Pulleys, Steel Crank. Windage Tray,Ported Oval Port Heads, Victor Jr Intake, Griffin Radiator,7 Qt Oil Pan. Built 350 Turbo Anti balloning Plate 26-28 Stall? Had Theft Of New Carb, Msd Ingnition. Running With Old holly & Hei.Could Set Of Engine Swap Headers As You Can See From Old Photo. Weld Front Runners.Could Be Fun Car. Need The Room. 3200.00 Firm Last Call. Thanks For Looking Dave. P.S Ment Harland Sharp Rockers Sorry. Call Afternoons.
Can someone translate this for me?
I has a Big Block!!!!!!!
Upgraded to roller lifters, but they aren't hydraulic. This means the valve train is still LOUD. And you need to re-set valve lash every so often (one a year? more often?).
Some information: if the heads are '72, they are pre-unleaded so the valve seats aren't hardened. A stock '72 454ci made ~270hp (net), according to Wikipedia.
A ~0.600" lift cam in a 454 could make a lot of power (>> 500hp). The original LS6 cam had ~0.530" lift and made 425-450hp with the appropriate heads (rectangular port) and ~11:1 compression on leaded gas. This 454ci could run terribly if not tuned properly. Or it could have those parts installed only on paper and be an otherwise stock 454 with chrome valve covers and an aluminum intake. ~0.600" cam + Victor Jr. intake = probably idles poorly, but sounds cool.
"Engine swap" headers are required to fit non-OEM engines into certain chassis. Several companies used to make MKIV BBC in a G-Body headers. I have a set with my Monte (not installed).
Steel crank is a good upgrade for a MKIV BBC as the OEM ones were cast except for the LS6/7. Steel cranks are required if you want to rev to more than 6K RPM. The cast ones won't hold up at high RPMs.
Non-high performance oval port heads (not from a 427ci) are not good performance heads if you want to make more than 400hp, but can be upgraded with bigger valves and modified for better flow. Getting rectangular port heads is a better option (since 427ci heads are fairly rare). There are also many aftermarket options which are even better, but this guy doesn't have that.
"Weld Front Runners" are wheels.
Not sure why a rebuilt engine would need to be "freshed" unless it wasn't done right in the first place, or was abused, or has a ton of miles on it. BBC parts are expensive, FYI.
"26-28 Stall?" Is he asking us? Probably means 2600-2800 RPM stall speed for the torque converter. Translation: sucks in traffic but runs out good at WOT.
Fun fact: you can buy "nostalgia" cams which have similar patters to older OEM cams but with "modern" features like hydraulic lifters.
http://www.compcams.com/Company/CC/cam- ... d=415&sb=2
My plan on the 454ci that never went into my Monte Carlo: 0.030" over 454ci + early 70's rectangular port heads + hydraulic LS6 nostalgia cam + 9.0:1 compression (pump gas) + stock truck cast crank + appropriate dual plane intake and carb = ~375-400hp at 5K RPM that should last for quite some time while making TONS of low end torque.
From Wiki:
The Big-Block was expanded again, for 1970, to 453.96 cubic inches (7.4 L), with a 4.250 in (108.0 mm) bore and 4 in (100 mm) stroke. The 1970 Chevrolet Corvette LS5 version of this engine was factory-rated at 390 hp (291 kW) and 500 lb·ft (680 N·m), and the LS6 engine was rated at 450 hp (340 kW). It has been suggested that the LS6 was substantially underrated and actually produced well over 500 horsepower (370 kW) as delivered from the factory, although there is no empirical evidence to support this claim. Indeed, the AHRA ASA (Showroom Stock Automatic) Class record-holding Chevelle LS6 for the 1970 season posted a best of season trap speed of 106.76 mph (171.81 km/h),[11] which suggests something on the order of 350 "as installed" (SAE Net) HP for a 3,900 pounds (1,800 kg) car and driver combination. Indeed, Super Chevy Magazine conducted a chassis dyno test of a well-documented, well tuned, but production-line stock 1970 LS6 Chevelle and recorded 283 peak HP at the wheels[7] - a figure that lines up quite well with the previously referenced 350 SAE Net HP figure.
