Big block Impulse
You read right. One of my Impulses has Novarossi CX-15 RACE. I actually used motor mounts from my old Ofna Nitro Z-10 (the only thing that car was good for.) Ofna now makes a better mount, part # 37957. There is ALOT of grinding to make it fit, and it just barely fits. The chassis, engine mounts, and radio tray support have to be ground for clearance. Lots of metal splinters. There is no room to change clutchbell gears, you have to change pinion and spur. The left side brace no longer fits, and the side belt is dangerously close to the engine. Some sort of belt tensioner must be fashioned. I used Wolfpack Radicals universal tensioner. Now the good news. The big block makes 200mm car FLY. I rarely use more than 1/3 or 1/2 throttle, although I have only raced small tracks. Overall a worthwhile conversion, just expect it to be time consuming. I'm trying to borrow digital camera to post pics. Hopefully tonight or tommorrow.