Thanks for the quick answer.

Damn i just bought my 4.1 last weekend. Dont kno if im going to buy the kit or just get the upgraded parts. Mainly the BB shocks and new slipper look like the biggest change aside from the now front hex wheel mounts

It is all standard except the motor mounting screws are 2.5mm. What you use for your SC10 will work perfect for the B4.x.

Make sure the circled stamp on the weight is either facing front or rear of the car...

I run 65 and 70C shorties in my 17.5 buggy also and there is a decent driver who has been racing for a long time that keeps telling me that I am losing power by running the shorties. His theory is that true battery power is calculated by taking the MaH rating x C rating. Since most full packs have a higher MaH rating that would make full packs more powerful and he says that extra power will out performance the gain from the weight loss in running a shorty.

Is there any truth to this, it sounds justifiable?

The "punch" you get out of a pack is more reliant on the internal resistance than the capacity, up to a point. Around here most of the fast guys in blinky run high C rating shorty packs in their buggies.

Iono all my packs are 60c-70c even my stick packs. And I never noticed a difference running either shorty or stick pack with same c rating even though my stick packs had higher mah's......... My guess is the stick packs with higher mah's the power would last longer say after a 10min run there may be a noticeable difference between the two packs............ I'm going to test that theory out next time at the track and try to run my 4600mah 70c shorty vs. my 5600mah 70c stick pack and see if I notice a power drop after running both to LVC..........

It was the stock arm mount, so went withy he 3 degree and 2 anti squat then it fit. Thanks

What about a 120c max amps?

It's not a theory. It's a simple physics formula.

That said, I doubt very many people running offroad could notice the difference between a stick pack and a shorty pack with the same c rating. And if they can, they're probably sandbaggers who shouldn't be running in spec classes anyways.

Well there are 80c 4500 shorties out not with the same weights at the 4k 65c packs. So in 8 minute mains, I doubt would would notice the difference. two weeks ago, I hoped up on the drivers stand for the mains and to my surprise the RD said, ok here goes the 10 minute main. The first 3-4 laps I definitely had more power, but the next 14 felt the same. I didnt really notice a taper off. But my full packs always did the same thing. But.... Not all tracks and layouts are equal. Some tracks you really need to keep the power higher longer. That is where you will really be able to tell the difference. Competition hobbies is the track that comes to mind. Those guys love 180's into a triple. But at CV we have guys in 17.5 running 3800mah 2 year old 30c packs and they are fine.

Don't know never tried them, and from what I've heard and read about the max amps lie about their true ratings. Don't quote me on that but I would never spend that much on a lipo anyhow so no way for me to find out for myself on how they perform.....

maxamps rating is a burst rating, I have asked them this a few times and they state it as such each time. They used to have a description on there site stating what TrueC was but as I was told, removed it as it was confusing people. To me at least, I think its more confusing NOT having that there. Other companies are also using the burst rating as well with it stated in small print.

@07forrester - I have updated the B4.1 first pagee to reflect some information. Feel free to steal what ever content you want for this thread.

Thanks wildcat. Ill make sure to take a look.