I Want to Build a Go Fast RC !

[Bondonutz]

I know what the Gyro will do in a drift car and of course for Helis, but please explain why you think it'll be a wise consideration for a straight shooter/drag car ?

And, can I get away with using as cheapie from Hobby city or should I be thinking of spending $$ on a qaulity unit (they get expensive quickly !)

Thanks again for the advice, this thread seems to be getting a bit of attention ?
I'm appreciative to get all this advice from you gentlemen,Thank You all.

[PBO]

In a 2wd the gyro can work for both acceleration & braking. With my Rustler I found that under acceleration if I lost rear wheel traction the way I had the gyro set up it made the situation worse & the steering started hunting (over correcting) & fighting itself to the point where the gyro had more control than I did even after I'd returned the TX to neutral...under braking however if I was running straight & the gyro was reduced a little from the point where it would hunt under acceleration, I could brake to a slow stop without any concern that I 'd loose control. Over 80, I find stopping a 2wd hard without some help

In a 4wd, if you use a gyro, I'd suggest adjusting the gain to aid braking. It just lessens the stopping worry & gives a bit more confidence to push harder under acceleration...but they're not as important in 4wd IMO

Sorry for the long winded answer

Stopping is something worth considering also. You want to stop slowly from 80+, I use about 15% drag & 30% brakes. Once you're not accelerating the drag settles the car momentarily before you start braking, I'm only talking half a second or so. I found this suits my style very well...I can't accelerate & then brake from that sort of speed easily, I just spin, so a very brief pause works for me. If you go mechanical brakes they obviously work as well as they're tuned but to replicate the same progressive feel takes more than adjusting the ESC but it's worth spending that setup time because hitting the anchors over 80 really unsettles the car

[Bondonutz]

You say long winded, I say informative.

Gyro; I will try without first, if I'm having any problems I will seriously consider one.

Thanks.

[nitrostarter]

Originally Posted by Bondonutz

You say long winded, I say informative.

Gyro; I will try without first, if I'm having any problems I will seriously consider one.

Thanks.

I second that and will do the same on the gyro.

I was planning on working up 30% drag brake and using 30% brakes.

I think I have everything planned out so far, and mostly everything on the way for my build. Just need my special lipos and packages to arrive. The only thing that worries me now is blowovers. We shall see how it comes together...

Bondo: Have you thought of tires? Going to run the GRP's? If so rcboyz on ebay has them.

Also, I was reading through and realized that you were running in 500ft, both acceleration and braking. So you are going to want fast acceleration, great traction, and then smooth braking. Sounds like fun!!

[Bondonutz]

NitroSneezer,
Yup, I'm ready to go to ! You'll have your stuff befor me though, BASTARD!
Gotta wait till Horizon gets mine then ship it out, little luck I'll see it third week this month.

I had planned on starting w/the kit tires what ever they are ? Do a thorough glue job and balance them and they should be just fine for testing at the least. I'm not in a big hurry to worry about tires yet, I have to settle on what I can get from Horizon to keep expenses down via the HobbyShop job.
Thanks for the GRP/RCBoyz heads up, I bought a LOT from them over the years !

I haven't measured the good surface yet, 500' is a educated guess ? Theres plenty of room befor and after it's just cobbley asphault that'll obviously upset the car.

If I'm not to tired I might go out where they're running and catch some video to posts, No one starts showing till 10pm or so.
I have to get up early for a day at the track

[nitrostarter]

Merry Christmas to me:

[Bondonutz]

Sweet Nitro, your on your way to getting started !
More info about your set up, what motor w/the 4s,gearing etc.

Q For you speed demons, Which would I better off with ?

The stock center spool or a open diff and explain why please.

[nitrostarter]

Top secret info...

Roller should be here soon. Body and GRP tires are at the post office.

[PBO]

Originally Posted by Bondonutz

Sweet Nitro, your on your way to getting started !
More info about your set up, what motor w/the 4s,gearing etc.

Q For you speed demons, Which would I better off with ?

The stock center spool or a open diff and explain why please.

I'm going with the stock spool (never seen or held one though) because I run 100k in my 8T diff which netts a similar effect. I run fairly light fluids fore & aft because I still need to turn around...I would expect this strategy to work with a fixed spool also

As a footnote though, I've found I eat bearings at frighteningly short intervals using 100k, this will often present as the rear centre drive failing under load...sounds ugly, looks ugly & has potential for mucho damage!

[nitrostarter]

I got the PF8-GT body and GRP soft rally tires in today after a fiasco with USPS. Just waitng on my roller now!

[snellemin]

coolbeans man. My GRP's arrived today. The body has been mounted but still needs painting. As the body is a high downforce model allready, I need to figure out what to with the rear spoiler. But it will be probably be 2 months before I even will have a chance at the 100mph run. I don't have too much free time right now.

[Bondonutz]

This is yanking my chain, you guys are gonna get yours together befor me

If I'm lucky my roller will ship out next week, fat fingers crossed.

[nitrostarter]

Originally Posted by snellemin

coolbeans man. My GRP's arrived today. The body has been mounted but still needs painting. As the body is a high downforce model allready, I need to figure out what to with the rear spoiler. But it will be probably be 2 months before I even will have a chance at the 100mph run. I don't have too much free time right now.

Cool stuff!

Any specific preparation required when mounting these bodies? Just make sure its on the car square and level?

Setting up the car with roughly 1/2-5/8" of ground clearance. The body should have roughly the same as well?

[snellemin]

I keep my driveshafts parallel to the ground. The body will sit lower on mine. I have no clue how stiff the body will be at high speeds. But I might have to add body stiffeners behind the front fender well and in front of the rear fender well. The rear wing will be my main issue. I'm just hoping the Hacker can deal with my nonsense.

Post some photos guys