I have this big buggy back together and got my first chance today to try it out. I'm now running 2 of these Gens Ace 5s 25c 4000mAh packs and this was their first run:
http://www.hobbypartz.com/98p-25c-4000-5s1p.html
So it weighs 18.9lbs. with these packs after the rebuild and I was running 10s geared for 50mph. Here is the log of the run:
I pulled 3300mAh from the packs before tossing my pinion and losing the grub screw. But I'd say the buggy is running great and these packs are what I was hoping for. More power than when I ran 10s with my Turnigy 40c 5000mAh packs. Today I hit 3990 Watts (= 5.35hp)! The maximum ripple voltage was 2.0V, which, at around 5% of total pack voltage is a "good place to be" according to the man himself in this post:
http://www.rc-monster.com/forum/show...2&postcount=11
I noticed that the buggy was handling better than when I last drove it. So I figured either it wasn't getting quite as much power as before or my shock absorber mods were helping. After looking at the logs and seeing the power I was getting, I'd say the shock mods are a big help to this. So, a good day, with good results.
Edit: Here's a picture of it before I took it out and got it dirty again: