YOU SAID:
Wanna see how fast I can make him go?
INTO JAPANESE
どれくらい早く彼を走らせることができるか見てみたいですか?
BACK INTO ENGLISH
Want to see how fast you can make him run?
INTO JAPANESE
彼をどのくらい速く走らせることができるか試してみませんか?
BACK INTO ENGLISH
Want to see how fast you can make him run?
That didn't even make that much sense in English.