Which non-pull engines fit the Qoncepts RBBC kits?
Nearly all non-pull big block engines without boost bottle back plates .21-.32 should fit. There has only been one reported engine that will not fit without replacing the carb. Axial .28 and .32 seeming come with 2 carb choices. One has a common configuration, the other has an uncommon high-speed needle orientation which points forward when put in most monster trucks. With this carb, the needle will hit the spur gear on the Revo. Make sure you get the one with common orientation. Click here to download Axial’s Instructions in PDF format and look at first photo on the first page. This is the carb you DO want. Look at the diagram below the picture. This is the carb you DON’T want. It is possible the carbs are the same and can be adjusted. We do not know. You will have to contact Axial (949 600-8642 ext 200) to be sure.
