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Old 04-23-2013, 06:01 AM   #481
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I've got a couple of race days on my new setup. I'm gradually getting it dialed in. Some of my race buddies have been very helpful. I did swap out the springs as per Heretic's suggestion and it helped a lot. I've been trying different positions on the shocks to see if I can plant the rear. I'm getting a lot of steering so I'm also easing that up a bit to balance it out. By the time I got it to the main is was a lot better but still needs a bit of help. I hope to dial it in at the next race in just under two weeks. Amazingly I didn't break hardly anything. I had to replace the ball cups on the rear camber links with RPM cups as the Associated ones can still break there. I still run the Associated ones in front as they don't bind and have taken the punishment just fine.

I also hope to have my second Sprint 2 up and running for that race day. It will be a Nastruck setup with a 17.5 motor in it. I'm debating between the Associated aluminum shocks and a set of Xray composite shocks I have. I think I'll try the Xray shocks on this one. I'll measure them first and go with the shorter set.

I'll post some pictures of this chassis soon and get some better pictures of the mods I'm doing.
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Old 04-23-2013, 06:45 AM   #482
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Default RC Calc Program

Here's program for your pc / lap top =

A program for RC drivers that does A LOT of STUFF!!!

It's a little "buggy" (IMAO) =
Inputting data can drive you nutz at times til you get the jist of things

They have the Sprint 2 Sport listed as a "combustion" type car - not electric =
Just change to brushed or brushless

The FDR for the S2 is incorrect

HPI Sprint 2 Sport IDR (Internal Gear ratio in this program) = 33/15=2.133333333333 etc.
Rounded to 2.133

You can save to disk, print out and create templates, etc.

The proggy is FREE - But you can donate to the developers


HPI Sprint 2 Mods - Making a silk purse from a sow's ear.-rc-calc.jpg

http://calcrc.com/index.htm

I just ran the SPEED calc section:
My S2, geared the way it is now for Westgate, calcs out to -
32.93 MPH with a fully charged (8.4v) battery
And down to 29.1 MPH when the battery drops to 7.4v


HPI Sprint 2 Mods - Making a silk purse from a sow's ear.-rc-calc-page.jpg

Print out =

HPI Sprint 2 Mods - Making a silk purse from a sow's ear.-data-1.jpg

I run a Turnigy TrackStar 21.5T @ Westgate =
I input the kV manually and the program found a compatible (?) motor in it's data base and plugged it in =
The Corally X-BP for the print out phase = ("bug"?)

Screen shots page =

http://calcrc.com/screenen.htm
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Old 04-23-2013, 10:07 AM   #483
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This thread started on 05/22/2012
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Thanks to all the people that have contributed to this thread
AND
To all that have viewed it
AND
To those that will contribute & view it - - -
Marv



Last edited by Marv; 04-23-2013 at 01:29 PM. Reason: VooDoo
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Old 04-24-2013, 11:17 AM   #484
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Thumbs up VooDoo TO DO LIST

On my VooDoo TO DO LIST =

Make an INDEX for the first page -

The INDEX will list the voodoo / mods, the post numbers & credit to the poster -

This is a WORK IN PROGRESS -


Last edited by Marv; 06-27-2014 at 06:49 PM. Reason: REVISION in RED
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Old 04-24-2013, 03:24 PM   #485
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Oh boy looks like the new motor didnt work

i can feel the same slight pulse in the new motors shaft when you pull the throttle trigger and when you let off it stops pulsing.

The ESC seems to be working goes green light on forwadr yellow in nuetral and red in reverse, you can feel the pulse in the motor shaft.

the reciever works and blinks if the control is off going into fail safe and when you unplug the ESC from the reciever the ESC constantly beeps, what am i not seeing here?
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Old 04-24-2013, 03:28 PM   #486
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Max have you tried resetting the ESC?
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Old 04-24-2013, 03:46 PM   #487
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no, is that in the manual with 3 different languages LOL
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Old 04-24-2013, 03:50 PM   #488
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Quote:
Originally Posted by MaxThrottle View Post
no, is that in the manual with 3 different languages LOL

Yeah... Try the version in ENGLISH...
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Old 04-24-2013, 03:55 PM   #489
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looked in the book, it's for the sprint sport, i have the flux brushless...
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Old 04-24-2013, 04:00 PM   #490
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Quote:
Originally Posted by MaxThrottle View Post
looked in the book, it's for the sprint sport, i have the flux brushless...
Here's the link to the update = http://www.hpieurope.com/manuals/pdf/100424.pdf
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Old 04-24-2013, 04:17 PM   #491
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sweet!! thanks!
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Old 04-24-2013, 04:18 PM   #492
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didnt change anything, guess i'll try another esc from my friends car
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Old 04-24-2013, 05:19 PM   #493
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Quote:
Originally Posted by MaxThrottle View Post
didnt change anything, guess i'll try another esc from my friends car
Are you sure all your connections are good?
That you didn't accidentally move one of the switches on the nose of the controller?
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Old 04-24-2013, 07:42 PM   #494
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Hello everyone! My name is Harrison and I'm new the the RC world. This is my very first RC car. It's an HPI Sprint 2 Sport. Hopefully I'll learn a few tricks while on this forum.
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Old 04-24-2013, 09:02 PM   #495
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Welcome to the thread Harrison -
There's a lot here
Don't let it overwhelm you
And remember - You don't need to do it all just to have a decent running S2
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