Originally Posted by InfiniteMotors

SinistiR and I run at XRC in PA, which is definitely short to medium with one 75ft straight. I've watched the 121vr closely while marshalling and honestly it seems to be the best engine for this type of track short of an OS Speed or modded engine. I kept watching closely how it pulled the D8 out of a hairpin that leads directly into a double and came to that conclusion. He can start on throttle while still turning, then punch it just before he straightens out and clear the double with ease. Average engines with good mid to top end power have to swing this hairpin a bit wider in order to clear the double. For our smallish track, this mills punch can really get you around the track fast if used properly.

On the other hand, with the Associated 2035 pipe and stock clutch bell he's running out of steam 3/4 of the way down the straight. This is at a consistent 245-250 degrees. We think the 17t will fix this and honestly with all that bottom I doubt it will cause any problems.

I'd like to see what a 2050(RE11) and 2060(RE10) pipe does to the 121VR, I'll tell him to throw them on this week and we'll see what happens.


-Jake