Bonehead,

"diesels are not throttlerd" and their high compression ratiois is just why Diesels engines have more engine braking than a gasoline engine. If you want a gasoline engine the have more engine braking, turn off the ignition and push the throttle to the floor. Then it will be running unthrottled like a Diesel engine and will have more engine braking.

Don't believe me, try it for yourself.

P E H