Can I Win!!
 

Ok first off do you guys think i can hit 50 with 4s lipo, 7XL, 125B, slipperential, 36 revo spur, 15 pinion, hb diffs, and a carbon,ti,and alu. maxx. Next a question for you guys i will be running the above set up and my friend is running 2 novack 6.5 gtb bl combos and 2s lipo on each esc also he is pretty much going all rpm exept for stock chassis and misc. alu (like bulk and other alu necessities). In you opinion what speeds do you think he will be getting. also do you guys think i can out handle him and or be faster. both trucks are going to be set pretty much the same on shock rate and ride hight. what do you guys think any advice. :028: ,:030: ,

Well, assuming you are using 5.6" tires, I figure top speed will be ~23mph. The spur/pinion, HP Pro diffs, and slipperential create a 22.704:1 ratio...

why is it so slow what can i do to hit 50 with that bl combo

what is it that makes it slow is it the gearing or what because that motor is fast and i am running 4s lipo so why so slow and how can i get to 50

What hb diffs are you running? The 3.31 or 4.3 to 1 ratio. I think brian is figuring
a 4.3 ratio.

It looks like the thing that's killing you is the high total reduction ratio. The HP diffs are 4.3:1. The slipperential is 2.2:1. And the spur/pinion is 2.4:1.

To get that speed, with all the values you listed, you'd have to use a 32T pinion. :eek:

Basically, you need to reduce the total reduction ratio. If you went with a direct center diff drive (removes the slipper though) and went with a typical 46T spur, and went with 5s (will run close to a hot 40k rpm though), you could use a 15T pinion and hit a theoretical 50.1mph (excluding tire ballooning).

Yeah, I'm figuring 4.3:1...

http://www.rc-monster.com/proddetail...d=HPI_PRO_DIFF i am talking about these hb diffs i would like to realistically hit betweenm 40-45 and i will commit to doing that any way i can with out changing electronics so if you could tell me what spur to use and all that stuff to hit 50 that would be good plus i am taping my tires so there should not be much balooning.

X-Maxx Project

1.) GorillaMaxx G2 graphite x-brace chassis $200
2.) GorillaMaxx G2 graphite chassis extension $45
3.) GorillaMaxx G3 XL battery straps $15
4.) GorillaMaxx G3 titanium hinge pin set $25
5.) GorillaMaxx G3 fasteners set $15
6.) GorillaMaxx G3 spaces set $10
7.) Ultimate Engineering servo saver generation 4 $85
8.) Flextek titanium suspension arms $200
9.) Integy MSR5 piggy back shock set (Blue) $129
10.) Integy light weight steering blocks (Silver) $60
11.) RD Logics front skid plate (Titanium) $25
12.) RD Logics front and rear bumpers with mounts (Titanium) $60
13.) RC Monster custom slipperential with spur gear $160
14.) RC Monster cnc machine speed control heat sink $30
15.) RC Monster mod 1 pinion 15T $25
16.) RC Monster ubec $40
17.) RC Screwz titanium T-Maxx screw kit $28
18.) Proline 17mm Standard wabash wheels (White) $35
19.) Proline standard size badland tires $65
20.) Proline team medium CA glue $7
21.) Traxxas revo slipper pressure plate $7
22.) Traxxas revo slipper clutch rebuild kit $7
23.) Traxxas revo spur gear 36T $3
24.) Fast Lane Machine front and rear hybrid bulkheads $140
25.) DUH Engineering Hybrid titanium front and rear shock tower set $40
26.) Hot Bodies front and rear lighting pro differential and pinions set $130
27.) T-Bonz Steel CVDs with dust boots $70
28.) Punisher Titanium 1/8 Maxx turnbuckles $50
29.) Atomic Racing Ford F-350 body with new school flames $35
30.) Ofna 17mm wheel hub set (Gun metal black) $30
31.) Hitec 5955TG titanium gear servo $115
32.) Quark Monster Pro 125B sensorless brushless speed control $280
33.) Feigao 540c7XL brushless motor $90
34.) Spectrum DX3.0 radio, receiver, and two servos $250
35.) Team Orion platinum 4800 liy-poly Batteries $300
36.) E-Cleck-Teck 40mm 5v fan $3
this is what i am using i do not minde changing the pinions, spur gear to get the result of 40 or more. but if there is absoulutly no way to hit in the mid 40s just by changing the spur gear i could possably change the motor (must be under $150) and or change the diffs to maxamizer if this helpes with speed(only if you think they will hold up) i would prefer to get the speed i want buy changing pinions and gears so lets see if we can hit that speed with that in minde and if all else fails maby i could change some of the others

you want these

http://www.rc-monster.com/proddetail...HPI_BUGGY_DIFF

the ratio of the ones above are 3.31:1 as opposed to the ones you listed, which are 4.3:1. just to let you know the stock maxx diffs are 2.85:1

Yeah, that's the diff that's 4.3:1.

Like I said, the total reduction is what's killing you. And since the Revo spurs don't come any smaller than 36T, you're kinda stuck. Even if you could get a pinion over 22T, would the motor still fit in the slipperential adjustment slots??

So even if i get the 3.31 hb diff because i am getting a slipperential i cannot reach as high speeds as with the regular trans g1 i mean

what if i get the maxamizer diffs less ratio than both hb diffs could i still hit those speeds with the electronics or will i need to drop the slipperential to reach those speeds.

yes, because the slipperential is geared toward the racer within the low to mid 30's for speed...if you all all out drag racing then you need to go a differ route, but when racing on a track it is not all about speed, yes that is nice....but you need to be able to handle it on the track as well...this is some of the things i learned at the bash

so i will be bashing but racing too it will acutally be on a parking lot racing at hobby town. so you are saying i probably will not get over 35 on the track anyway and if i do it will be to uncontrolable to mess with.