What is a butterfly valve and why was it removed from the 1992 Mercedes-Benz 190E 2.5-16 Evo 2 DTM car?
At the Goodwood Festival of Speed Andre had a chance to look over one of the most successful DTM car models of all time, the Mercedes-Benz 190E Evolution II. In this short [TECH NUGGET] he discusses what a butterfly valve is, how it can be restrictive and why competition cars like this 190E use alternative setups like a slide throttle.
There is now a full [TECH TOUR] of this 190E Evo 2 here.
Want to learn how to tune EFI? Start here instantly, and for free.