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  1. #1
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    AnthonyV's 148mph 8s XO1 - Video and GPS

    I know you guys have been waiting to see a complete run of the 8s XO1 that I've been running. Well, here you go. Unedited, uncut, and with a GPS confirmation immediately after the run. It utilizes the Kershaw design 8s mount kit, Castle XL2 ESC, and Leopard motor. If I decide to keep the car, I will more than likely make a custom fiberglass body to increase the cars aerodynamics. I also have another set of tires that I run which seem to do a bit better than the stock slicks. It's very difficult to find time to go out and run the car yet alone have someone come out to film and clock it with a radar gun.

    A few notes about the video:

    1) Very bad start off of the line. You can see the car veered towards the curb and took me a while to get it tracking straight.

    2) I did not lay into full throttle until the car passed by me. When it passed by the camera it was probably going around 80mph. Usually I hit around 100-105mph and I'm already in full throttle way before it passes by me compared to my other runs that have been 130+mph.

    3) I ended up running the car out of the range of the transmitter which is why I had to walk towards the vehicle. This is the first time that I've ran it out of range on the 8s set-up. I lost a lot of runway due to the lousy start.

    4) I stopped the timer on the GPS once the body was removed. I am pointing at the screen to show the speed as well as MPH indication. Telemetry speed is always wrong. I simply use it as a reference. I knew when it showed 194mph that the car was in the 140's when compared to my other runs.

    5) I will have more video's up provided the weather holds up like it currently is. I plan on having 2 or 3 camera men so that the video can capture the car passing by when it is going 140+mph. I also plan on having a confirmation speed via radar gun. If Traxxas ever gets the clear XO1 body's in then I'll also have a nice in cabin video of the run. I'll also leave the rear window clear so that I will not have to pull the body after each run to view the speed. As you can see, I tape down the edges prior to my runs. The brace on the vehicle also helps to keep the roof of the body rigid at these high speeds. I'll be honest... running cars at this speed is a pain in the butt and very time consuming. Getting the perfect run combined with a complete video is even a bigger pain.

    I'm more than welcome to share specifics of the set-up if you guys have any questions. This car is fun but I really don't have time to run it as much as I'd like to. Thanks to Miles for coming out to film today.



    E Revo brushless, XO-1, Nitro 4 tec 3.3, HPI RS4

  2. #2
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    Oh man that's sick!

    I hear you on making videos of the high speed passes because to "prove it" you have to get a clean pass and have someone pretty much follow every second of the run.
    XO-1 #4...

  3. #3
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    Awesome run... I am having problems with my aerodynamics... was doing about 75 today and went airborne and crashed breaking stuff as I slammed into the curb ughhh.. How can I increase the downforce?

  4. #4
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    wow thats pretty quick ,
    where you using the bsr foams ?
    ive never thought of speed runs as time consuming really , find the street and do some runs and pack up and gone should take no more then 20-30 min now on road track racing , now thats time consuming take up your whole day and cost alot more then owning these cars
    i think the reason your telemetry is reading so high is probably due to the tires
    btw not saying the gps or anyone is lying but unedited uncut is you put the car on your truck bed hatch , reset the gps to zero then put the body on tape it then run it and come back and show results .
    XO-1,SLASH 4X4 ,SLASH 2WD , 2/RUSTLER

  5. #5
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    Quote Originally Posted by XO-1 MD View Post
    Awesome run... I am having problems with my aerodynamics... was doing about 75 today and went airborne and crashed breaking stuff as I slammed into the curb ughhh.. How can I increase the downforce?
    The front splitter/canards work well on both of my applications. However, the front end needs additional weight. I'll post some pictures if I get a chance tomorrow on the added weight that I use. I run weight on both my 6s and 8s xo1 in order to help keep the front planted down. As far as rear down force, get rid of the stock wing and make a customer adjustable spoiler (flat).


    Quote Originally Posted by BennyG6 View Post
    wow thats pretty quick ,
    where you using the bsr foams ?
    My 8s set-up does not seem to do that well with the BSR foams. The amount of power and throttle sensitivity that the 8s has compared to the 6s is night and day. I have not tried the BSR foams since going with the new spoiler design.


    Quote Originally Posted by BennyG6 View Post
    i think the reason your telemetry is reading so high is probably due to the tires
    .
    No, they are stock XO1 slicks on the 8s. The reason the telemetry does not read is because it is a mathematical calculation. You cannot enter into the TraxxasLink the specifics of my set-up. For example, it thinks I am still running a 1717 motor with the MMM ESC on 6s. I am running neither of these and there is no way to simply program it into the application. I use telemetry as a reference only. If I break a certain MPH on the telemetry then I know it will be worthwhile to remove the body and see what the actual GPS speed is. I use it more to monitor voltage and engine temperatures more than anything though. I made a point to show the telemetry speed to document that you cannot go by reported telemetry values.

    Now, if you look at my 6s application when I'm running the BSR foams then yes... it has roughly a 8-12% variation in speed due to the smaller diameter tire. Again, I use telemetry as a 'reference' only. Also, it is important to record the runs and view them afterwards. Sometimes you'll get a 'spike' in the peak RPM with the telemetry. You know you have a good run when you hold a nice steady speed for a decent duration of time.


    Quote Originally Posted by BennyG6 View Post
    ive never thought of speed runs as time consuming really , find the street and do some runs and pack up and gone should take no more then 20-30 min now on road track racing , now thats time consuming take up your whole day and cost alot more then owning these cars
    Running the 8s set-up is not like running the 6s set-up. The 8s set-up requires a specific area to run. It is a lot more skiddish than the 6s and if you lose control... then you're going to break stuff. I learned my lesson after hitting a curb at 75mph. The 8s set-up is much heavier than the 6s set-up which means it takes much longer to slow the vehicle down if you don't want to lose control and wipe out. I've been everywhere and the road in the video seems to be the best one around for high speed runs. Also keep in mind, the road that we run at is a public road with a high volume of traffic. Every few minutes a car/truck or 18 wheeler drives down which results in having to stop the run. Due to my gearing, I pay close attention to my engine temperatures. If it exceeds a certain temperature I will bring the car back, untape everything, then allow it to cool with either a fan or inside of my car with the AC turned on. I also usually review the recorded datalogs after each one of my runs to verify that everything is working properly. There has been a time that it took me over 45 minutes to get a single run in. Also, I don't just go out there with my car to run. I pack up pretty much everything with me when I go run this set-up. Build a 140+mph car and you'll see how frustrating they can be.


    Quote Originally Posted by BennyG6 View Post
    btw not saying the gps or anyone is lying but unedited uncut is you put the car on your truck bed hatch , reset the gps to zero then put the body on tape it then run it and come back and show results .
    I agree with you completely. We actually attempted to do this today with several runs. Something would go wrong each time... traffic, run was cut off early, hit a dip in the road which throws tracking off, engine temp a little too high, forgot to start the GPS recording, phone battery started going low, etc. As you see, I tape my body on each time and check the wing angle as well. It starts to become a huge pain to film everything from the start to only find out an 18 wheeler is coming down the street and you have to bring the car back because the temperatures are getting a big higher than you'd like to see. Also, prior to my runs I will also do a few burn outs in order to warm the tires up so that they are nice and sticky. So to make a long story short, I got frustrated and said just film it when I'm ready to do the run after I realized we were starting to run low on camera battery.

    But as I said, I agree with you. Plans are to have several of my buddies out there and have them at different locations with camera's as you never know exactly where the end of the run will be. The only thing about having a video from the very beginning to the very end is the fact that you'll be watching a boring video that's at least 6 minutes long, lol. Then add in the amount of time it takes the gun man to walk back about 1/4 mile to report with the clocked radar speed unless you another person filming at that exact location.

    We have used a radar gun before on this vehicle and the GPS readings are both accurate and precise. We have clocked it with a radar gun at 145mph about a month ago. Whenever I get around to getting a perfect run on video you'll not only have GPS verification but a radar gun as well as a camera view closer to the end of the running area. From past results, we have seen higher speeds with the radar gun when compared to GPS. Nothing crazy... but usually a few MPH higher on the gun than the GPS unit. This is more than likely due to the sampling rate of the GPS unit.
    Last edited by AnthonyV; 01-13-2013 at 10:33 PM.
    E Revo brushless, XO-1, Nitro 4 tec 3.3, HPI RS4

  6. #6
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    Wow thats awesome!
    20 mph away from the fastest Rc record!
    I think you should bump it up to 10s!
    I think the Mamba Xl2 can take it, if not it costs $100 to fix it non warranty by castle!
    You will probably break the world speed record!
    Xo-1
    Pede 4x4 PE - Slash 4x4 PE
    Miss Geico Boat

  7. #7
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    Nice run T.....

  8. #8
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    been using those white gears for years, that was my secret, lol.....

  9. #9
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    What gear ratio is that T?....

  10. #10
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    It sounds like you hold the throttle...great run. I can't watch it again though? Says its unavailable

    I'd like to see the specs if you don't mind posting them up? especially some more photos with & without the body on if that's not too much or a build thread link if I've missed it?

    The aerodynamics are of particular interest. Have you considered adding vertical elements at the rear? you may be "too slippery"

  11. #11
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    Wow, nice pass!
    The Annihilator....fastest XO-1 on planet Earth.