RR Racing Inserts vs. AWR Motor Mounts
- Thread starter ProtoType5
- Start date
Kooldino said:
It was a FormulaSAE car that I helped design and build in college at Auburn. We used 600cc sport bike engines/trannies mounted between the driver and rear wheels. We built the thing for under $10k and it did 0-60mph in under 3.5 seconds and held around 1.2 g's on the skidpad. We were making 80hp (restricted) and the car only weighed 500lbs! It's an autocross car. I attached some pics.
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awsmp5 said:
Seriously, I wouldn't sweat it if you ordered the inserts. I just purchased the set, but have only installed the fronts so far. The difference is dramatic. It does not completely elliminate wheel hop or engine rocking and all of the associated ills. I would estimate a 75% improvement with the front mount alone. I figure the rear mount, once installed, will bring me to a very nice compromise of performance and noise-vibration-harshness level.
BTW, the biggest change for me was the increase in noise between 4000 and 5000 rpm. This is a classic resonant frequency for 4 cylinder engines, but those soft mounts must have ben tuned to elliminate it cause its noticable now! I figure most people don't mention it because they have other mods such as an intake the have already increased the noise levels.
Good luck
mogi said:
Yep. We used a Honda CBR600 engine which normally has four 34mm carbs to get air and fuel. By the rules we had to run all of our air through one 20mm restrictor. It helps keep the speeds down since we were also the guys driving these things. The fastest we get in competition is around 75 mph on the acceleration (drag) run. The course was designed pretty tight to limit speed as well. Check out a video of acceleration testing by the team at Auburn.
There are a bunch of videos here for anybody interested.
