PONTIAC - stock Pontiac Super Duty 421v8/405hp vs stock Chevy 409v8/409hp on DYNO

WATCH THE VID TO SEE HOW CLOSE THEY Dyno TO THEIR FACTORY 405hp/409hp ratings. Growing up.....Pontiac/Oldsmobile old timers/EXPERTS who taught me most of what I know, often told me Chevy rated their horsepower in a more optimistic way than say Oldsmobile or Pontiac. I've even heard Pontiac rated/tested their engines in a 100 degree room, compared to Chevy in a 60 degree room. These Dyno results seem to reflect that some of what I heard was true. Both of these engines are great, but the results do seem to show that Pontiac was not rating their horsepower worrying if it would cause "songs to be written" about their engines .... like the great song "She's real fine my 409"--(Chevy).

More Videos...


Pontiac GTO 400 Engine 1967 Dyno Session Motor Test
Completely built stock type Pontiac engine by bakersfieldcrateengine.com This engine made over 400 HP and 500 TQ All stock parts except for the internals





Driving a 1966 Pontiac Catalina 2+2 421 4 Speed
We test drive a stock 1966 Pontiac 2+2 421 4 speed.





Firing up A Brand New Chevy 409 Engine
My dad and I built a Chevy 409ci engine, and we fired it up for the first time today. It has a roller camshaft and valve train setup, so it didn't need the always worrysome break in procedure that a flat tappet engine requires. This video is from the second time we ran it, as we had to shut it down on the first try, due to a coolant leak. All of the smoke is from the anti-freeze on the headers, and the fact that they're brand new headers. Here's a spec list on the engine: 1963 Chevrolet 409 block (stock bore) 1961 409 forged crankshaft Stock connecting rods 1963 high performance forged pistons 11:1 compression ratio Clevite bearings Hastings rings Felpro Gaskets ARP Main Studs, Rod Bolts, Head bolts, and accessory bolts Edelbrock Performer RPM aluminum cylinder heads Comp Cams hydraulic roller 236/242 duration at .050-inch lift, .578/.593 max lift, 110 LSA Comp Cams roller lifters, pushrods, Comp Ultra Pro Magnum 1.7:1 rocker arms Edelbrock Performer RPM dual quad intake with dual 500cfm four-barrel carburetors Edelbrock as-cast finned aluminum valve covers (air cleaner not pictured) Edelbrock aluminum water pump Pertronix billet distributor, coil and plug wires Hooker 1-7/8-inch Super Competition headers Engine break-in and initial tuning is being performed on a home-made engine run in stand, complete with a battery, fuel supply and cooling system. Stay tuned for more videos on this engine, as we tune it, in preparation for some Dyno time.





PONTIAC Grand Prix (1970 455cid w/rare 4speed, of which only around 500 were made)
A truly overlooked Luxury Performer. One of the top car magazines back in the day tested a 390hp1969 H.O.428cid Grand Prix and reported times of 0-60 in 5.5 and a 13.8 quarter. This 1970 455v8 Grand Prix in the video was rated with 20hp less (370hp for the 1970 455) due to emissions detuning for 1970. The 1970 455 was basically a larger (stroked) 428 with some emissions detuning.




Follow