Results 1 to 21 of 21
  1. #1
    RC poster
    Join Date
    Mar 2019
    Posts
    8

    Slash 4x4 speed run help

    Hi,
    Alright so recently I bought a used xo-1 and put quite a bit of time and effort into it to make it what I wanted and to track straight to the point where I was comfortable to use it at its capability. After that I am now hooked on the whole speed run builds.

    So now I have a slash 4x4 that seems to be a very popular chassis to use. I have questions regarding the setup of the chassis as well as the electronics.

    First the chassis. Right now where it sits my slash is bone stock other than the shocks. I have the Traxxas big bore shocks. Not sure if those are efficient or not. Just giving you an idea of I where I stand. I already ordered battery trays, custom motor mount and a chassis brace from saga custom rc. I now Iím gonna need to upgrade my driveshafts. The mip seem to be a preferred choice. Again Iím open to ideas. I need to change over to 17mm hexs. A tire recommendation is appreciated as well. And what parts really should be upgraded. Diff fluid. Ect..

    Now for the big stuff!! From everything Iíve read the castle creations XLX ESC is a good one. But Iím not sure what motor to use. Iím looking at the castle creations 2028 motor. Is this one any good? Iím looking to make this car do over a 100 mph+. But I want a reliable motor that will give me that and not to much grief. I also found out which I never knew was to add cap packs for the riddle current. So which is a good cap pack. (makes me wonder if the xo-1 should have one to than) would it be a good idea to make the cap packs a plug and play or not. More connections is not great but is that really going to hurt me.

    And last but not least! The connections. When it comes to the amps and what connections to use Iím at a loss. Are the xt90 connections any good for this or should I strictly make every thing bullet connections.

    I know I asked a lot here. I just want to do this right. If any of this is most important it would be the motor/ESC thatís what Iím really trying to figure out. Thanks in advance!

  2. #2
    RC Champion
    Join Date
    Jan 2003
    Location
    nc
    Posts
    2,528
    My favorite platform for speed. i would go with a tppower 4070 cm 2200 motor, castle xlx, and use 8mm bullet connectors, and a ripple Killer cap pack. best out there. start with grp tires and then when car is getting faster can switch to foams (bsr)
    slash 4x4 168mph
    youtube:philip jolley

  3. #3
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    Great thank you. Definitely helped me here. I wasn’t sure with the 2028 motor. I’ve read and seen a lot of people use tppower motors. Now with that motor what size shaft would you recommend? 5 or 8mm? And what end cap? Open or closed vents.
    With the cap pack is it okay to make that with a connection for like a plug and play? Or should that just be solid wire?
    I have a bunch of questions. Lol this is my first build and I want to do it right but make it as user friendly to. But I know more wire is not really good with these kinds of amps and voltage. Thanks again!

  4. #4
    RC poster
    Join Date
    Feb 2019
    Posts
    2
    What about the tp 4070 2250kv?

  5. #5
    RC poster
    Join Date
    Feb 2019
    Posts
    2
    The 2250kv looks good to

  6. #6
    RC Champion
    Join Date
    Jan 2003
    Location
    nc
    Posts
    2,528
    2250 is a great motor also. yes you can connect the cap pack with bullet connectors.
    slash 4x4 168mph
    youtube:philip jolley

  7. #7
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    [/PHP]
    Quote Originally Posted by phildogg View Post
    2250 is a great motor also. yes you can connect the cap pack with bullet connectors.
    Great. I appreciate your help a lot. I did end up going with the tp 4070 cm 2200 motor. As well as the killer cap packs. The grp Tireís for now. Sheís a work in progress!

  8. #8
    RC Champion
    Join Date
    Jan 2003
    Location
    nc
    Posts
    2,528
    Quote Originally Posted by Racerderek38 View Post
    [/PHP]

    Great. I appreciate your help a lot. I did end up going with the tp 4070 cm 2200 motor. As well as the killer cap packs. The grp Tireís for now. Sheís a work in progress!
    awesome! grp will work nicely for awhile. till you push them too hard. then they become a weak link. if you need any more help lmk.
    slash 4x4 168mph
    youtube:philip jolley

  9. #9
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    Quote Originally Posted by phildogg View Post
    awesome! grp will work nicely for awhile. till you push them too hard. then they become a weak link. if you need any more help lmk.
    I do have another question. This is my first ever build so I want to do it right and from what I see your the top dog here. Lol
    I plan to go 6s first for obvious reasons. When I’m ready if I ever am I’ll go 8s. From what I read batteries can make or brake it. Not sure how true this is.
    I can’t charge any higher than 3s right now. With this build money is going quick so I’m not looking to have to buy a charger right away. If you have any recommendations that would be great.

    As for now I can’t think of what else I could ask you but if I need it I will.

    Traxxas has a strict language policy. A word filter operates to change inappropriate words and banned websites or brands to *s. When you see these in your post, you MUST edit them out. -ksb51rl
    Last edited by ksb51rl; 03-12-2019 at 08:21 PM. Reason: content

  10. #10
    RC Qualifier Panther6834's Avatar
    Join Date
    Jan 2019
    Location
    SF Bay Area
    Posts
    360
    Also take a look at SMC's batteries. Quality-wise, they're right up there with the best of them...plus, since you're buying them direct (there's NO "middlemen", NO wholesalers, NO 3rd-party distributers, etc), they cost considerably less than almost all other high-end batteries.

    https://www.smc-racing.net


    ~ Coming to you live, from somewhere on planet Earth.
    ~ Love, laughter & kindness makes the world better

  11. #11
    RC Turnbuckle Jr. GeneralPede01's Avatar
    Join Date
    Sep 2015
    Location
    Toomsuba, Ms
    Posts
    3,161
    If you get grp wheels make sure to get the new J series hard wheel. They hold up to speeds better.


    Sent from my iPhone using Tapatalk

  12. #12
    RC Qualifier
    Join Date
    Dec 2017
    Location
    North Texas
    Posts
    552
    Both PhillDog and GenralPede01 are Traxxas Slash 4x4 speed runners with many records of high speeds.
    I completely agree with all their comments for the setup.
    I know MIPs work but are quite heavy, you may want to look into the Tekno 6m axle and hub setup.

    If you are going to buy batteries and chargers I'd recommend looking at running parallel 4s initially and then when ready swap wiring to make it 8s. You can go well over 100mph on 4s. If you are running that big TP motor you will have to invest in batteries anyway. Lesser batteries will get in to low voltage cut-off pretty quickly. Like others said SMC is a great battery and tends to be lower priced than some other options. (plenty of records set with them)

    Hopefully you have some good roads and patience, there is a learning curve.

    Another side note, I believe most of us figured out a long time ago that Futaba radios have the best range. Nothing worse than getting your $1000 rig out of range and have a car coming down the road towards it!!!

    -Liberty

  13. #13
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    I already ordered my wheels. I have the grp revo s7 medium/hard. Are these any good? Will they do the job for now. Thanks

  14. #14
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    Quote Originally Posted by LibertyMKiii View Post
    Both PhillDog and GenralPede01 are Traxxas Slash 4x4 speed runners with many records of high speeds.
    I completely agree with all their comments for the setup.
    I know MIPs work but are quite heavy, you may want to look into the Tekno 6m axle and hub setup.

    If you are going to buy batteries and chargers I'd recommend looking at running parallel 4s initially and then when ready swap wiring to make it 8s. You can go well over 100mph on 4s. If you are running that big TP motor you will have to invest in batteries anyway. Lesser batteries will get in to low voltage cut-off pretty quickly. Like others said SMC is a great battery and tends to be lower priced than some other options. (plenty of records set with them)

    Hopefully you have some good roads and patience, there is a learning curve.

    Another side note, I believe most of us figured out a long time ago that Futaba radios have the best range. Nothing worse than getting your $1000 rig out of range and have a car coming down the road towards it!!!

    -Liberty
    Yes I went with the big tp motor that phillDog suggested. So you’re saying go 4s in parallel. I am going to have to invent batteries yes. But I would need a charger to than. My chargers only do up to 3s. Which is why I’m saying I’ll do 6s. I don’t want to spend anymore than I don’t have to. But I will take that into consideration.

    Now you say after I make the jump to 8s eventually to rewire for it. What is “8s wiring” my plan is to wire the car for 8s including the cap pack. Whether I run 4s or 6s it should be good...? Right.

    The last thing you said was the radio. Is this any good? Futaba 4PV 4-Channel 2.4GHz S-FHSS/T-FHSS Radio System w/R304SB Receiver It has anti lock braking which seems like it could be good for speed runs as most crashes seem to be under bricking. I can’t see myself spending $800 on a radio though. Hopefully this is sufficient than. Thanks

  15. #15
    RC Qualifier
    Join Date
    Dec 2017
    Location
    North Texas
    Posts
    552
    Yes the 4pv would be great. One thing to note is to program the esc to run drag brake. This applies the brake lightly anytime you are off throttle. Imagine if it does lose signal... it will automatically start slowing the car down. I always tune the braking percentage so that it is not too much. Plus there is a throttle curve and brake curve to tune.

    You can certainly start on 3s and then 6s. Moving from one configuration to the other is just making some bullet wiring to have the batteries in parallel or series. The cap pack for 8s will work fine on lower power levels. Batteries and chargers are an expensive but necessary evil.

  16. #16
    RC Qualifier
    Join Date
    Dec 2017
    Location
    North Texas
    Posts
    552
    Hopefully the others can give some good advice on the s7 compound tires you have. My experiences with grp is limited but I know that those usually have less grip and wont do well on cold weather/pavement.

  17. #17
    RC Turnbuckle Jr. Squeegie's Avatar
    Join Date
    Jun 2014
    Location
    Southern California
    Posts
    7,308
    I have some GRP S7 's but have not run them yet...
    They are for Southern California summers where we have +100˚F temps for days on end.
    Creativity is intelligence having fun. -Einstein

  18. #18
    RC Champion
    Join Date
    Jan 2003
    Location
    nc
    Posts
    2,528
    I have ran s7 alot and once they are warmed up grip like crazy. Also when the tires are worn seems they grip better also..
    slash 4x4 168mph
    youtube:philip jolley

  19. #19
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    Quote Originally Posted by LibertyMKiii View Post
    Yes the 4pv would be great. One thing to note is to program the esc to run drag brake. This applies the brake lightly anytime you are off throttle. Imagine if it does lose signal... it will automatically start slowing the car down. I always tune the braking percentage so that it is not too much. Plus there is a throttle curve and brake curve to tune.

    You can certainly start on 3s and then 6s. Moving from one configuration to the other is just making some bullet wiring to have the batteries in parallel or series. The cap pack for 8s will work fine on lower power levels. Batteries and chargers are an expensive but necessary evil.
    Okay. That’s good to know about the drag brake. I didn’t know that. Makes sense. I will definitely range test to know my limits though.
    And yes I know that batteries and charges are necessary. But for now until I can spend a little more I’m going to run 2- 3s packs in series. My plan for the build though is to wire with heavy wire and cap pack for an 8s application. When I spend the extra on the bigger stuff I’ll be good to go. (Probably a smarter idea to start slow and go up anyway) I appreciate your help.

  20. #20
    RC poster
    Join Date
    Mar 2019
    Posts
    8
    Quote Originally Posted by phildogg View Post
    I have ran s7 alot and once they are warmed up grip like crazy. Also when the tires are worn seems they grip better also..
    Yes, I’ve heard they are only pretty good on warm days. If I need to I’ll look into foams. But for now this is what I’ve got.

  21. #21
    RC Qualifier
    Join Date
    Dec 2017
    Location
    North Texas
    Posts
    552
    Quote Originally Posted by Racerderek38 View Post
    Yes, I’ve heard they are only pretty good on warm days. If I need to I’ll look into foams. But for now this is what I’ve got.
    Foams are a 2 edged sword. On one hand they have great grip and seem to be much more stable. The flip side to that is once there is a small flaw they have to be tossed, and BSR 1/8 scale foams are not cheap.

    GRP tires on the other hand can take a beating and keep on going. When getting started crashes are part of the game nearly 50% of the time once you are pushing over 80mph. I always say get the car dialed in with GRPs and IIIIFFFFFFF you get to the point of going over 140mph then look into foams.

    -Liberty

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •