Proformance Unlimiteds Pontiac 400 with 450hp...PowerJection III EFI Unit
http://www.proformanceunlimited.com/ Live run of a Pontiac 400 with a PowerJection III EFI Unit....Proformance Unlimited....There is no other
Pontiac 400 final dyno pull
Engine built and Dyno'd by Al at New Generation Racing Engines of Fenwick ON. Anyone in Ontario that needs work would be worth going to see him. A Pontiac 400 bored .030" over so now a 406 with comp cams extreme energy hydraulic cam and lifters, roller timing chain and roller rockers. Lightened and balanced Scat crank. Ignition upgraded to MSD HEI with Accel 8.8 mm sprial core wires. 6X-4 heads ported and port matched to ported factory dual plane intake manifold. Factory 750 CFM Quadrajet reworked by Cliff Ruggles performance.
First Start up of Pontiac 400 engine
My Dad and I decided to drop the new 400 engine into the Heavy Chevy to work out the bugs before placing it into the restored Pontiac GT37. We had to break in the new cam at 2500RPMs for 30 mins before we are able to put in the second set of springs and adjust the valves.
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).