David Lloyd's Butler Performance built 421 Tri-power engine on the Dyno. Bored and stroked to 453 cu.in., compression ratio lowered to 9.4:1 for pump gas, B.P. ported & polished cast iron heads, B.P./Comp hyd roller cam. Going in David's 1965 GTO. www.butlerperformance.com #ButlerPerformance #Pontiac | Butler Performance Pontiac
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David Lloyd's Butler Performance built 421 Tri-power engine on the Dyno. Bored and stroked to 453 cu.in., compression ratio lowered to 9.4:1 for pump gas, B.P. ported & polished cast iron heads, B.P./Comp hyd roller cam. Going in David's 1965 GTO. www.butlerperformance.com #ButlerPerformance #Pontiac | Butler Performance Pontiac
3.3K viewsJul 15, 2017
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421 SUPER DUTY ON THE DYNO @ Butler Performance!! This 421 SD is using the early "306" heads. These flow a little less than the 1962/ #127's and much less than the 1963/ #980 heads, but it still made great power. Almost 500 HP and well over 500 ft.lbs. of torque!! We actually have both a 1962 389 SD with #127 heads and 1963 421 SD with #980 heads in the shop now that we'll be finishing soon. We love working on these old, rare SD's and really love to hear them scream on the dyno! #ButlerPerforman
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421 SUPER DUTY ON THE DYNO @ Butler Performance!! This 421 SD is using the early "306" heads. These flow a little less than the 1962/ #127's and much less than the 1963/ #980 heads, but it still made great power. Almost 500 HP and well over 500 ft.lbs. of torque!! We actually have both a 1962 389 SD with #127 heads and 1963 421 SD with #980 heads in the shop now that we'll be finishing soon. We love working on these old, rare SD's and really love to hear them scream on the dyno! #ButlerPerforman
4.1K viewsAug 25, 2015
FacebookButler Performance Pontiac
Butler Performance built 421 Tri-power engine
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Butler Performance built 421 Tri-power engine
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YouTubeButler Performance Pontiac
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“Thank you for the help with the Pontiac engine” Iron Horse Restorations / Rodney Huber assembled one of our machined/blueprinted/ready to assemble Engine Kits using a block he provided that we put through the complete "Butler Process" Link for this kit: https://butlerperformance.com/c-1267471-crate-engines-and-builder-kits-crate-engine-builder-kits.html For question about this or to get a free quote started email us at tech@butlerperformance.com. #pontiac #pontiacfirebird #pontiactransam #ponti
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“Thank you for the help with the Pontiac engine” Iron Horse Restorations / Rodney Huber assembled one of our machined/blueprinted/ready to assemble Engine Kits using a block he provided that we put through the complete "Butler Process" Link for this kit: https://butlerperformance.com/c-1267471-crate-engines-and-builder-kits-crate-engine-builder-kits.html For question about this or to get a free quote started email us at [email protected]. #pontiac #pontiacfirebird #pontiactransam #ponti
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Roger Bolliger’s Butler-Powered 700 HP Trans AM Race Car All-aluminum Pontiac engine built by Butler Performance We offer each individual part of this build on our website, AND we offer all of this combo in complete KIT form (shortblock and longblock kit versions) that is ready for you or your builder to assemble. For questions about this or to get a free quote started, email us at [email protected]. And for details on what we sell or to learn more about the “Butler Process” check out o
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