My Overkill Ultimate Summit
This is a partial repeat of my post in the bragging thread but with a liitle more detail.
I thought I would make a new thread in case people want to ask questions.
I will say I am some what of a R/C newby in that my summit is the first proper R/C car/truck I have ever owned, I have only had it for 1 year and my only R/C experience before this is a Walkera (cheap chinese) helicopter. 60B for those who know.
I will be Honnest to all questions from my perspective and will admit if I have wasted my money on anything as I go. I am the sort of person who will try something if I see merit in it and can not see major drawbacks, or things that can't be dealt with. My buying the RC4WD Cyclones is a good example of this.
Anyways here we go.
Name: Jack (of all trades).
Motor: Tekin T8 2000kV Truggy mounted above the transmision in the erevo forward position.
ESC: Tekin RX8 (to be liquid tape waterproofed in the future).
Pinion/Spur: 18/68 for now. I may gear down yet.
Batteries: 2 x 2S 9000mah 28C Lipos.
Speed: I could only get 60Kph (about 37Mph) by the GPS with rear wheel drive (broken front driveshaft) but it had more to go.
Runtime: Until something breaks. I have no idea but I guess at least 1 1/2 hours high range and 3-4 hours in low range.
Wheels: RC4WD Cyclones 4.0.
Tyres: RC4WD Rock Crushers 4.0.
Body: Stock, blue, very beat up. I will be looking to replace soon.
Suspension: Stock shocks with 70wt oil, 4 x double orange springs, centre hole on all a-arms and very little preload all round.
Radio System: 2.4GHz High Output 5ch Traxxas Link.
Steering: Dual plastidip waterproofed Hitec 7954SH servo's with 10A CCbec set to 7.2V and y-harness inside receiver box. Metal steering belcrank with servo saver spring removed.
Other additions are RPM front and rear bumper mounts. RPM front a-arms with custom diff clearence to keep as much streangth as possible. Chargery BM-6 with custom 2 x 2S to 1 x 4S balance tap adaptor. Oh and the Traxxas roof light bar.
This tyre/rim combo had no problem doing 60Kph (not jumping all over the place like the stock tyres do at about 35-40Kph) but I broke the front driveshaft within minutes of driving it out of the shed (my own fault), and it was literally breaking traction with the rear wheels and drifting sideways down the butumen road at 60kph. The motor/esc had alot more to go (esc temps were only 50°C about 120°Fand motor was ony 45°C) but I don't have the skill to use it yet, especialy with rear wheel drive only.
I have not had a proper crawl with these tyres or with the Tekin but playing in the back yard the tekin seems very smooth with only 'the slightest' coging when going super slow and crawling up an obsticle. I am using the foams that came with the crushers with no internal weight added and the cyclones seam to seal the air inside the tyre (I can't sqeeze any out with my hands), so my foams wont get wet. My impression with the tyres are that they seem to grip fairly well on the tread face but don't seem to have the side bite of the stockers. A proper crawl will reveal all but this will have to wait now as I don't have a spare driveshaft. DOH!! 2 week wait from the states or 3 times the price and only half the wait!!
I'm happy to report that a 10A CCBEC will fit in the waterproof receiver box with a modified y-harnes for the steering servos. I also have a small sillica gel satchet in there but there is not allot of room left.
My SMC 9000mAh 28C batteries will go in the battery compartments, but one of them is JUST too big to say it fits. Still I got theses batts for a good price and I am happy with them. Heaps of runtime even with an 18V dewalt geared 18/54 which would do about 38Kph (about 23.5mph).
One other thing to mention is I sheared a drive pin that came with the RC4WD wheel adaptors on one of the rear wheels. I have replaced it with the traxxas pin and all seems to be good for now.
The wheel adaptors that come with the cylcones 'to suit the traxxas summit' are a 14mm hex with a 17mm nut. If I were to buy these again I would spend the extra $10 and just get the 17mm adaptors and drill the centre hole out if It needed it. To me it seems like a step backwards to go to 14mm drive hex but I will see how it goes.