Quote:
Originally Posted by rodneym
Here's a quick update on my 511FE Twin Paxton build:
Tom Lucas of FE Specialties contacted me recently and said that the engine was ready for dyno. He got belt slippage at 5200 RPM/711 HP. He wasn't getting the leverage he wanted on the tensioner so he had the ‘small’ aluminum bracket made of stainless steel instead. Different type belt, more tension, less slippage and more pressure; it made 768 HP on the next go round. I saw the video and I'll post it when I get a copy from Tom's camera. I’ll also post the dyno results on paper.
The engine itself could do more but not with the old fashioned Paxton SN60's, they're just not effiecient enough. Keith Craft predicted 700-750 HP and Craig Conley (maker of the SN60's) also said 750 HP, so we agreed to leave well enough alone. It would have been a different story with a modern supercharger and cog drive but that's not for this motor. The engine looks amazing and the aluminum brackets (small SS one too) are a work of CNC art.
My Kirkham is at Tom's shop awaiting install. There's still a couple open ended questions regarding the hood scoop, so everyone's input is welcome.
I can't wait to get her back!
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That's awesome Rodney!
BTW, if your typical "run of the mill" modern FE build with aftermarket blocks, heads and intake make 550-600 HP, then 768 HP is between 20-40% more HP. Seems reasonable to me. Can't wait until it gets dropped in and you're "puttering" around town.