Check in my signature below "RS4-2 Duet" I also own two HPI RS4-2 they are good cars and have much potential if done correctly.
i did a search already but did not come up with 2 much on how to solve my problem.
i have an rs4 2 with a dynamite .12 spd i think it was tuned by ron paris and i also have the 2 speed now as well.
here goes with the original motor before the 2 speed and now with the .12 in first gear only the car runs great and the dynamite motor is awesome great speed and accerleration for very cheap. the problem is as soon as it hits 2nd gear it goes to spin out.with the body on or off. i am running a honda prelude body and had a small wing for looks on it. a friend of mine at my lhs put an offroad wing on it and it handled a lot better but still spins out when in 2nd only but it goes straight about 20 ft longer. it doesn't matter if you let off the gas or are still on it.
any idea what i can do to make it run better it is getting close to 45-50 and is stock with 45wgt oil front rear, x pattern tires,rear shocks upper lowest mounting ,lower closest to the tire .