Originally Posted by
vr6cj
Actully I agree with Smokin. I used the new Viper 8.5/Tekin RS last weekend in my FT T4 with mixed results. I had it geared at first more traditionally with the 84/18-20 and the Tekin was set with 85timing in dual mode. Motor had 10 deg timing on the can. It wasnt any faster then a 17.5 to me. Tried a slew of things to get it faster until I tried using a 75 spur. It finally woke up in the main geared at 75/24 but came off at 160ish degrees. I lapped the field mind and won but still not fealing it was "better" then my D3 or SP motors. Now this motor had plenty of battery to draw from too...used a TP 65c 5300 pack. T4 isnt binding, good bearings, clutch is V2 and set correctly, also has gear diff.
I am going try sensored mode with some boost to see if I can get it any faster this weekend. Maybe these motors like some boost?
Any thing I shoujld do different?
I was unable to get power out of a 17.5 until I over geared the thing. For an 8.5 I would only be running in sensored mode. I would try no boost first and just see if you can get the power you are looking for with gearing. 160 is about right. I run all my motors hot but in onroad if you are not pushing 180 probably doing something wrong.
I also noticed that running the motor in buggy I could not get a large enough gear to really make the motor work. I put it in a sc truck and that seemed to get the power out of the motor. These motors seem to have lots of torque but do not like to spin up like say a D3. Right now I am running 75/23 with full endbell timing and 40 degrees of dynamic timing just to keep up.
Not really sure how the team drivers are setting up their vehicle but from all the posts on here you and I may have got bum ones.