R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 03-12-2013, 10:17 PM   #436
Tech Regular
 
Join Date: May 2012
Location: Somewhere in Tornado Alley
Posts: 308
Trader Rating: 4 (100%+)
Default The last of my build pics

Here is the top without flash which may yield some better details for your viewing pleasure.



This shows my cable control with zip ties to the upper deck. The shocks are Associated aluminum with Associated springs. The shock towers are not part of the Exotek kit.



More of the front from the front. You can see a bit more detail of the electronics placement.



I hope I made this is clear and easy to understand. My photos aren't my best work but I think they get the point across.

Last edited by nubie-wan; 03-13-2013 at 08:06 AM. Reason: corrected spelling.
nubie-wan is offline   Reply With Quote
Old 03-13-2013, 06:04 AM   #437
Tech Apprentice
 
MaxThrottle's Avatar
 
Join Date: Jan 2013
Posts: 53
Default

i printed out the setup sheet from post #14 THANKS MARVE!!!
__________________
Sprint 2 Flux w/ 2010 camaro body
41 willys Parma body, 68 primer gray Camaro beater body
65 Mustang coupe body, GT40 body
67 Vette kyosho body
MaxThrottle is offline   Reply With Quote
Old 03-13-2013, 08:48 AM   #438
Tech Master
 
heretic's Avatar
 
Join Date: Aug 2006
Location: europe
Posts: 1,106
Default

hi,

I'm by no means an expert but AE reds in front and AE greens in the rear seems like a very unbalanced setup. Especially with a rear-heavy car like the sprint 2.
Not sure what tyres you're running but blue/ blue or maybe even Gold rears / blue fronts would seem better. Maybe blue rears / sliver fronts for something softer overall ? just my 2 cents.

Also, regarding the lead in the bumper, I've always been told that any weight past the wheel axles (overhang) is bad for any onroad car.

Nice job on the tensioner BTW, though not adjustable it is simple, efficient an clean.
__________________
I love wedge bodies. I love dish wheels.
heretic is offline   Reply With Quote
Old 03-13-2013, 09:04 AM   #439
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Thumbs up

I should have a newer version (taking brushless into consideration) finished by the weekend Max.

Quote:
Originally Posted by MaxThrottle View Post
i printed out the setup sheet from post #14 THANKS MARVE!!!
Marv is offline   Reply With Quote
Old 03-13-2013, 09:50 AM   #440
Tech Regular
 
Join Date: May 2012
Location: Somewhere in Tornado Alley
Posts: 308
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by heretic View Post
hi,

I'm by no means an expert but AE reds in front and AE greens in the rear seems like a very unbalanced setup. Especially with a rear-heavy car like the sprint 2.
Not sure what tyres you're running but blue/ blue or maybe even Gold rears / blue fronts would seem better. Maybe blue rears / sliver fronts for something softer overall ? just my 2 cents.

Also, regarding the lead in the bumper, I've always been told that any weight past the wheel axles (overhang) is bad for any onroad car.

Nice job on the tensioner BTW, though not adjustable it is simple, efficient an clean.
I'm definitely not an expert and you probably are correct. I've been chasing my tail trying to get the rear planted on this car, or any of my cars for that matter. It seems that I have stiffened the front a lot trying to get the rear to not spin out so much. I also realize a part of it is my poor technique with the throttle as I'm still a novice. I've been using HPI X treads. I'm going to try the belted ones this season as they are legal in USGT. I run on asphalt sprayed with soda. I may be approaching this the wrong way and hence my frustration.

As far as the lead on the bumper, I tried to get it as close to the axle as possible as locations behind it are few. Perhaps I might relocate it to the space between the steering horns and the A arms. I'm sure you are correct in this assessment too. I'm still experimenting and I have a lot to learn.

Thanks on the tensioner comment! I found it to be enough to keep the belt off of the battery and not so loose as to jump cogs. The new chassis seems to be tighter on both ends as far as the belts go and my understanding is to have the belts fairly slack on this car.

I really do appreciate your insight. Thanks!
nubie-wan is offline   Reply With Quote
Old 03-13-2013, 09:55 AM   #441
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Default

Everyone has their own voodoo
My voodoo what works for me...
Until I find better voodoo
ALL voodoo is welcome here...

*New voodoo is added as it becomes available.



Nice work nubie-wan! How much do the Exotek parts weigh?

+1 on the ass heavy S2 =

Stiffener fronts/softer rears may be an issue =
Less front traction

Especially with that lighter chassis =

After some experimenting:

I find that 12# Front/14# rear is working the best currently (before the battery move - not track tested) - I still have some push =
I may drop to 8# front / 12# rear
Don't know yet...

Recent mod (snippet)
Battery moved forward 3/4" and battery holders chopped to accommodate...

HPI Sprint 2 Mods-dscn4646.jpgHPI Sprint 2 Mods-dscn4654.jpg

Handcrafted 25gr brass bar drilled and screwed to the front using longer screws at the bulk head & 25gr aluminum transponder mounting plate =

HPI Sprint 2 Mods-dscn4653.jpg

I'm about 5gr shy of gravity balance, but the transponder should square that off -

Before battery move, brass and mounting plate =
Approximately 155gr to balance

Now =
About 5gr

heretic makes some good points -

I'm not going to debate the finer points of where to put weight to balance =
Whatever works for the individual =

Experiment -




Quote:
Originally Posted by heretic View Post
hi,

I'm by no means an expert but AE reds in front and AE greens in the rear seems like a very unbalanced setup. Especially with a rear-heavy car like the sprint 2.
Not sure what tyres you're running but blue/ blue or maybe even Gold rears / blue fronts would seem better. Maybe blue rears / sliver fronts for something softer overall ? just my 2 cents.

Also, regarding the lead in the bumper, I've always been told that any weight past the wheel axles (overhang) is bad for any onroad car.

Nice job on the tensioner BTW, though not adjustable it is simple, efficient an clean.

Last edited by Marv; 03-14-2013 at 05:46 AM.
Marv is offline   Reply With Quote
Old 03-13-2013, 01:36 PM   #442
Tech Fanatic
 
vtec.'s Avatar
 
Join Date: Jan 2009
Posts: 963
Trader Rating: 1 (100%+)
Default

quick question. i feel as if my flux is dragging? as soon as i let go of the throttle the cars comes to a halt, no coasting at all..
do i have to reprogram my esc maybe?
also when im at top speed my rear end seems to get really bouncy!
vtec. is offline   Reply With Quote
Old 03-13-2013, 02:58 PM   #443
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Thumbs up

PM sent...

Quote:
Originally Posted by vtec. View Post
quick question. i feel as if my flux is dragging? as soon as i let go of the throttle the cars comes to a halt, no coasting at all..
do i have to reprogram my esc maybe?
also when im at top speed my rear end seems to get really bouncy!
Marv is offline   Reply With Quote
Old 03-13-2013, 04:11 PM   #444
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Exclamation SWEEP TIRE CHART

SWEEP TIRE CHART
Attached Thumbnails
HPI Sprint 2 Mods-sweeps-tire-chart.jpg  
Marv is offline   Reply With Quote
Old 03-13-2013, 07:00 PM   #445
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Post REVISED SET UP SHEET BLANK

Kit settings are marked with *
What has worked for me is in GREEN
Attached Thumbnails
HPI Sprint 2 Mods-final-enhanced-03132013-copy.jpg  
Marv is offline   Reply With Quote
Old 03-14-2013, 08:34 AM   #446
Tech Regular
 
Join Date: May 2012
Location: Somewhere in Tornado Alley
Posts: 308
Trader Rating: 4 (100%+)
Default

I didn't weigh the parts before assembly.

I'm looking at the comments you and Heretic made and will try various spring combos to find some balance as well as alternate weight locations.

I just ordered some springs and some other parts to get my Ackermann link to be adjustable. At least my car is almost road worthy so I can test it at the track in a week and a half. A few minutes on the setup board after the last of the parts and I'm set.

I really like your transponder mount Marv! Very cool. Thanks for all of your voodoo again.

Last edited by nubie-wan; 03-14-2013 at 08:39 AM. Reason: Fixed some spelling.
nubie-wan is offline   Reply With Quote
Old 03-21-2013, 01:55 PM   #448
Tech Rookie
 
Join Date: Mar 2013
Location: Ontario,Canada
Posts: 1
Default

Hello everyone, i am new but have been reading this thread for a while now and it has helped me alot fixing up my sprint 2. I have a question about sway bars,i have read that the cyclone tc ones fit on the sprint 2 but i dont think you can get them anymore i cant find them anywhere in stock. Does anyone know of any other ones that might fit. Thank you.
Stevereno is offline   Reply With Quote
Old 03-21-2013, 04:54 PM   #449
Tech Adept
 
Loveme_some RC's Avatar
 
Join Date: Jan 2010
Location: Whittier, CA.
Posts: 164
Trader Rating: 10 (100%+)
Default

I took out my Sprint 2 that was used for drift & now getting ready for VTA.
My question is, how are you all connecting the wires to your motors?
My previous motor was the Novak EX 10.5 & I am switching to a Novak Ballistic 21.5
The 21.5 is shorter that the EX, so the motor prongs hit exactly where the rear area. See pictures below.

I do not get many options on installing the motor & the only way that motor seems to fit is if one of the motor wire prongs hangs out the bottom.

Any Advice?




Loveme_some RC is offline   Reply With Quote
Old 03-21-2013, 05:36 PM   #450
Tech Addict
 
Marv's Avatar
 
Join Date: Jul 2011
Location: ORD
Posts: 701
Trader Rating: 2 (100%+)
Default

Notch out the motor mount
Rotate motor so wires are on the right side
Attached Thumbnails
HPI Sprint 2 Mods-dscn4666.jpg   HPI Sprint 2 Mods-dscn4667.jpg   HPI Sprint 2 Mods-dscn4668.jpg  
Marv is offline   Reply With Quote
Reply


Tags
hpi, sprint 2


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 02:17 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net