Drag racing pushes a car’s powertrain to the restrict. When working on the razor’s edge, failures could be catastrophic when one thing goes mistaken. Simply watch what occurs when this Honda-powered Toyota MR2 has its valve cowl blow up on the strip.
The run begins incredible. This automobile launches like a rocket down the monitor. Then, issues go very mistaken. From the beginning line, the incident seems like a puff of white smoke. Issues are far more dramatic from contained in the car’s cabin as a result of a twig of oil instantly coats the rear window.
Nonetheless, the driving force would not notice something is mistaken as a result of the engine is behind him. Naturally, he is listening to the monitor forward. He’s unaware of an issue till a monitor official mentions a fireplace across the turbo and oil everywhere in the monitor. When the racer lastly seems on the rear window, his solely response is a dejected, “Damnit.”
By some means, the engine developed sufficient crankcase strain that the entrance of the valve cowl exploded. The lacking piece is sufficiently big that the valve springs are simply seen.
The rationale for the failure is not obvious. There are giant breather strains on the valve cowl with tubes that run to a catch can within the cabin. Nonetheless, a telemetry sensor on the engine exhibits 19.6 kilos of crankcase strain. For context, a thread on the Honda-Tech discussion board references an engine having 0.5 to 1 pound of strain whereas working 40 psi of turbo increase.
A separate challenge with this run was that the transmission refused to enter fifth gear.
It is not all unhealthy information, although. Earlier than the valve cowl exploded, the MR2 was having a incredible run. The automobile set a brand new private finest for velocity within the eighth mile at 156.58 miles per hour, which blew previous the earlier 149-mph high run. Regardless of not having fifth gear and the engine failing, the driving force nonetheless managed to hustle via the quarter-mile in 7.6 seconds at 178.64 mph.
We reached out to the proprietor for extra particulars about the reason for the failure and extra particulars in regards to the automobile. His Instagram provides a bit extra data, although.
The engine is a custom-built Honda Ok-Sequence four-cylinder engine with a billet block. An enormous turbo feeds it increase. A {custom} exhaust with large-diameter pipes routes out of the panel between the taillights. The proprietor estimates the setup could make 2,000 horsepower when correctly tuned.
If you wish to see this MR2 working efficiently, try the video beneath. It covers the quarter-mile in 7.594 seconds at 192.38 mph.