70 Double Blown GTO
My 1970 GTO with two blowers. It's 474ci Pontiac engine with a 8-71 blower on top of a 6-71 blower. This is from the last day of being double blown. I'm going to one single 8-71 blower and going racing. The front clip was removed to make it easier to work on. The reason for the double blowers was not as a power enhancement like many ASSume. I stacked the blowers to have a car that stood out in the crowd. Most Pro Street cars were starting to blend together. If you seen one, you had seen them all. That wasn't the case with this GTO. Al someone had to say was "The double blower GTO" and people knew which car. I was told it couldn't be done, so I attempted it and it worked. It stayed that way for almost 2 years. I knew a twin turbo setup would make more HP. I knew I could have run a 14-71 blower and made more power. That wasn't the point. I wanted to be different than the other cars in the parking lot, I did that now it's time to ove on. For all those people who don't understand why, I'm not going to try and explain it to you anymore. Get over it. I didn't expect EVERYONE to love it. But you won't forget it.
PONTIAC 455 UNLEASHED!!!!
www.autoappraiser.ca
I BUILD THEM BIG!!!!!!!!!!!!!!!!!!!!!!
MORE POWER THAN COMMON SENSE!!!!!!!!!!
TURN UP THE BASS TO HEAR THE ROAR!!!!!
2000 HP Pontiac Tempest Street Test. Director's Cut. From Nelson Racing Engines.
This video is a compilation of four separate videos at NelsonRacingEngines.com as well as footage not seen on the internet before. The original video of this Pontiac has been posted all over the internet and has been seen by more than 2 million viewers. If you have seen the original Viral video, you may still enjoy this new Directors Cut of this crazy Street/Strip monster machine. If you wish, You may download NRE videos for your IPOD or PS3 at http://nelsonracingengines.com.
Two-Lane Blacktop (1971 film)- G.T.O explains the 455 V8
G.T.O. (Warren Oates) speaks of the engine and it's mods (Ram Air IV, etc) to a hitchiker he picks up (where a sign sez not to 'cause prison nearby, you see a lot of those in Texas), and Oats utters some classic lines:
G.T.O.: "Performance and image, that's what it's all about."
G.T.O.: "Just color me gone, baby!." VRrrrooooom!!
Warren Oates ... G.T.O
Bill Keller ... Texas hitchhiker
James Taylor ... The Driver
Laurie Bird ... The Girl
Dennis Wilson ... The Mechanic
Directed by Monte Hellman
Pontiac 455 duet
The LeMans (on the left) has a mild, non-rebuilt 455 with ported & polished 6X heads, c. 9:1 compression, Edelbrock Performer intake, Holley 800 Street Avenger, Comp XE274 cam, making maybe 300-350 horsepower. The Grand Am (right) has a .030 over 455 with Edelbrock heads (87 cc chambers), 10:1 compression, same Comp cam but with 1:65 roller rockers, slightly better Exhaust (H-pipe), Edelbrock Performer RPM intake and Edelbrock 750 carb. About 500 horsepower at the flywheel. The heads make all the difference. The Grand Am has the Flowmaster American Thunder Exhaust system, which has the 50-series mufflers. LeMans has a Summit Exhaust system, which was cheap and went on nice & easy.
OLDSMOBILE 455 W-43 EXPERIMENTAL HEMI AND OTHER EXOTIC ENGINES - THE JOHN BELTZ YEARS PHOTO TRIBUTE
John Beltz was Oldsmobile's chief engineer in 1964 and one of the prime movers of the Toronado and 442 project. Beltz was promoted to Oldsmobile general manager at age 43 in 1969 when Harold N. Metzel retired. Beltz passed away in May of 1972 from cancer at the age of 46.
John Beltz is leaning on a dual fan 455 Olds and posing with other experimental Olds engines that never saw production.
Here are descriptions of these engines:
1. The 0W-43 all aluminum 455 with 4 valve per cylinders, four overhead cam Weber engine. With a redline of just under 8,500rpm it was originally conceived for CAN AM racing. At 3,000rpm it put out 300hp and at 6,000rpm registered over 600hp. The top output recorded for this engine in the Lansing Dyno facility was 700 real hp at 6,800rpm. Tests were run with both carbueration and fuel injection. The block was cast from Reynolds 356 alloy and fitted with pressed-in dry steel cylinder liners for the Forged-True 12.20to 1 pistons. Billet steel connecting rods by Carillo was used along with a forged steel crank. The engine weighed in at 50 pounds lighter than the production 455 motor! It was developed at the same time as the ZL-1 Chevy 427 motor.
2. The W-43 4 valve per cylinder 455 developed by JOHN BELTZ , LLOYD GILL , JOE JONES AND FRANK BALL. Rated at 500-550hp with a single Rochester Quadrajet on an aluminum manifold. Constructed with both cast iron heads and block and with aluminum-alloy block and heads 75 pounds lighter than the conventional 455 production engine. Engine featured four valves per cylinder with narrowed angles for a super efficient combustion chamber design, central spark plugs and could easily be adapted for chain for gear driven overhead camshafts. 455 engine had 4.625inch cylinder centers, a 4.125 bore and 4.250 stroke. Making use of the 3inch main bearings and 2.50 inch rod journals, the engine was fitted with a specially prepared cast crank fitted with SAE-1140 forged steel rods, forged 10.20-to-1 pistons which rode on Morraine 400 bearings. Four bolt main block boasted 2 additional 5/8inch drain holes. Four valve heads featured 1.750inch intake valves (SAE-8640 steel) with 22 degree stems and 1.375 Exhaust (214-N stainless steel) with 15 degree stems, special Stellite seats, bronze alloy guides, o ring plug tubes, 14mm spark plugs, 3/8 inch pushrods and aluminum rocker arms. (Of all the experimental Olds engines, this one came the closest to production and there are photos of this engine in street gear. MAY 71 HOT ROD MAGAZINE features some of these engines and the sadness of the Olds engineers of that time of how they would never be released.)
3. 455 dual turbocharged CAN AM ROCKET CHALLENGE. 659hp @ 6250rpm. 554lbs torque @ 6,250 rpm. Alloy block with 4 bolt mains. Forged steel crankshaft. Forged True pistons with 8.5 to 1 compression. 3inch main journals. 2.499inch rod journals. Carillo billet steel rods. alloy heads. 2inch intake valves. 1.625inch Exhaust valves. Crower roller camshaft with 555inch lift and 320 degrees duration. Dual TRW-375-E-10 turbochargers with Boost Wastegate 10and 1/2psi. Lucas fuel injection. Olds alloy intake.
Competed with big block Chevy Mclarens and Porsche Panzers in CAN AM racing circa 68-69.
This video is merely a couple of old magazine pages strung together with the exception of that blue 455 hemi which was found on the internet. Thats BRUCE MCLAREN in that green can am race car which is Olds powered. AT THE BEGINNING OF THE VIDEO JOHN BELTZ IS POSING WITH SOME ENGINES FEATURED IN THE JULY 1969 ISSUE OF HOT ROD MAGAZINE AND THE BLUE OLDSMOBILE 455 HEMI WAS FEATURED IN THE MAY 1971 ISSUE OF HOT ROD MAGAZINE. The incidental music I overlayed onto this video was muted by youtube.
69 Olds 442 with 455 / Crower Beast Cam 304H
Olds 455 40 over, Speed Pro Forged 9.5 to 1 comp ratio
Iron C Heads Ported & Polished
Crower Beast 304H hyd cam, Comp Roller rockers
