Drag Racing 1/4 Mile times 0-60 Dyno Fast Cars Muscle Cars

Pontiac 350 - 350 Horsepower For Less Than $500.00

A short video describing the modifications done to the 65,000 original mile Pontiac 350 engine in my 1975 Formula. Using heads, cam, pushrods, rocker arms and an intake that I had laying around, this Pontiac 350 developed 353 horsepower and 385 lbs/ft of Torque, for less than $500.00 invested.


 


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Pontiac 350/421 Heads 1-3/4" Hedman Headers Flowmaster 2.50" Crossflow:
First fire-up video of my 1975 Firebird Formula with Pontiac 350 using '092' 421, small chamber/small valve heads. Camshaft is a custom ground UD with .466"/.467" lift - 220°/226° @ .050" on a 111.5° LSA. Cranking compression is 185-190 psi. Headers are 1-3/4" primary, 4-tube Heddmans #28150 with mandrel-bent, full-length 2.50" Exhaust system. Muffler is a Flowmaster #42585 Transverse-mounted crossflow with mandrel-bent 2.50" tailpipes and factory-style, 2.50" stainless steel hockey-stick tips. Carb is n 800cfm Q-Jet with .070" main/idle air bleeds, .074" main jets, .045" primary metering rods, 8 in/Hg power piston spring, .037" idle tube restrictions, .046" idle channel restrictions, 'G' secondary metering rod hanger with .029" (CC) metering rods. Transmission is a M-20 Muncie with a 8.5" disc brake 10-bolt with 3.23:1 gears. Car went on to produce 311 RWHP and 325 lbs/ft RWTQ on pump gas through the mufflers. Ignition is HEI with zero ohm carbon button, .080" AC R46SZ plugs .080" gap and 20° BTDC at idle, 8° of manifold vacuum advance (28° total @ idle) 16° centrifigal, 44° total timing.





pontiac 350 with 092 heads
This engine came out of a 1975 pontiac firebird i rebuilt this 350 at fullerton jr college so far this eng has a torker 2 intake 40 over pistons 1.6 roller rockers summit headers and a big cam from rubens racing cams in anaheim I have a holly 750 but wasent in this video the stall speed for the torqe coverter is a 2600 stall the heads of the eng came off 1966 389 or 421 gto 092 heads which are 70cc but been decket so they are 68cc closed chamber yielding a 10.5 - 10.75 compression ratio





Pontiac Firebird Flowmaster #42585 Transverse Mounted Muffler:
A short video of the Flowmaster #42585 Transverse Muffler in my 1975 Formula. Engine is a 9.75:1 Pontiac 350 developing 353 HP.





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Pontiac 350 17 in/Hg @ 650 rpm with 220° Intake Duration:
Pontiac 350 using '092' 421, small chamber/small valve heads (1.920" intakes with 1.660" Exhaust) with blocked Exhaust crossovers. Camshaft is a custom ground UD flat-tappet hydraulic with .466"/.467" lift - 220°/226° @ .050" on a 111.5° LSA. Crower #68405 dual valve springs @ 1.700" and 1.52:1 roller rockers. Note 17 in/Hg of vacuum @ 650 rpm....Cranking compression is 185-190 psi.





10 second 68 Firebird Sacramento Raceway 1987
This 68 Firebird was my first car purchased when I was 17 in 1977. The car is currently undergoing a frame-off restoration. At the time this video was taken in 1987 it was powered by a 455 Pontiac engine. The best ¼ mile performance was an ET of 10.87 and a MPH of 124.83 WITHOUT the aid Nitrous oxide. The heads are ported factory cast iron D-Ports cast# 48. Crankshaft is factory 455 Rods are factory 73/74 455 Super-Duty Camshaft is a Cam Dynamics solid flat-tappet with .618/.644" lift (1.65 rockers) 265/275 @.050 duration Advertised duration is 312/322 int/exh Pistons are Ross flat-tops yielding 12:1 compression ratio with the 69cc chambers Carburetion is 2 660cfm Holley center squirters mounted on a Doug Nash/Warrior tunnel-ram manifold. The differential is a Dana 60 with a 4.10 ratio gear set





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73 Pontiac Kicked Off The Track
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Pontiac 400 engine after rebuild
This is engine for my new 1977 Trans Am "Racer". Specs: '73 block with stock type crank (.010), pistons (.030) and rods,'69 heads No. 46 with no mods, stock '69 intake manifold, Summit headers, CompCam 268 HE complete camshaft with stronger valve springs and 1.6 roller rockers.




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