We don’t get much explanation for this video other than it’s a Blown Alcohol engine built by 1320 Speed & Kustom.
We’re sure they build lots of great engines, but this particular run is entertaining for a different reason. Practically as soon as the dyno operator pulls the throttle, the engine literally blows the exhaust pipes off the headers.
We suspect it was a combination of too little exhaust flow capability combined with too much cam overlap sending unburned fuel out the headers. But no matter the reason, we still get a Fourth of July moment to enjoy.