![]() ![]() Seems to run good at 25 degrees of initial timing. Holley, Mallory Unilite dist, stock exhaust manifolds. One thing to keep in mind is that your gear ratio and tire size will dictate your cruising rpm, and you'll want your engine to be most efficient at whatever that rpm may be. I just fired up a rebuilt 350 chevy today with flat tops, mild cam (420 In. The edelbrock is a little easier to tune for the average person and performs well under most circumstances. I know some will claim big power or lots of mileage from quadrajet carbs, and it is possible, but tuning them is a science in itself. I would venture a guess that you would see about 300 hp and 350ftlbs torque with a simple well tuned engine with parts that work together. I'd change the heads to a set with slightly larger valves to increase flow, smaller combustion chambers to bump compression, an economy/rv type cam, put headers and decent exhaust on it, maybe consider an intake that will allow the use of an edelbrock carb, and spend some time with the distributor tuning it all in. Making more power will help you make mpg. That engine may get the job done as is, but if you're looking to get decent mileage too, you'll need to make some changes. Part of why it runs so well was getting rid of TBI but it is a super mild cam and Im sure it would be a big improvement even under a TBI setup. Whoop it's ass and get twice the gas mileage. +1 I am running the larger LT1 cam (.449/.459 117 LSA) whatever year that was, in my 3 lb K1500 and it PULLS. I'd put a 307 up against a 350 TPI engine any day. Chevy also built other versions of the OMC 307 rated at 210 hp (157 kW), 215 hp (160 kW) and 225 hp (168 kW) SAE gross. Chevrolet never produced a high-performance version of this engine, though they did produce, for Outboard Marine Corporation, a high-performance marinized 307, rated at 235 hp (175 kW) and 245 hp (183 kW) SAE gross, depending on year, that shipped with the Corvette/Z-28's cast aluminum valve covers and Rochester QuadraJet carb. The later emissions-modified versions produced just 115 hp (86 kW) SAE net, giving the engine one of the lowest power-per-displacement ratings of all time. ![]() The 307 replaced the 283 (but are the same engine block with a longer stroke) in Chevrolet cars in 1968 and produced 200 hp (149 kW) SAE gross at 4600 rpm and 300 lb With HUGE HUGE combustion chambers and shitty compression and a 2 bbl.Ī 307 cu in (5 L) version was produced from 1968 through 1973. Is SOOOO despised because it only made 200 hp. The scourge of the Sbc, the most al time hated Sbc, the boat anchors boat anchor Sbc, the redheaded step child sbc, the infamous and dreaded 307 ( one of my favorites btw) ![]()
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