Starter box questions

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badboy
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Starter box questions

Post by badboy » Sat Mar 31, 2012 7:33 pm

Went to my first race today.  The turnout was not that good because it was overcast and a threat of rain.  I learned alot.  There was one particular racer there that I talked to and he was very helpful and gave me some good direction.
If I go nitro I will need a starter box and the racer I was talking to said I will need a bigger flywheel a different engine mount and maybe a new backplate.  This is all to lower the engine to sit lower so the wheel can make contact with the flywheel.  The buggy I am now looking at is the hot bodies rtr.  How do I find out exactly what I need to order to allow the starter box to work?  And anything else you think I may need to take into consideration?
BADBOY- Savage X: Picco .28,

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Cadimman
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Post by Cadimman » Sat Mar 31, 2012 7:46 pm

Most Ive seen will work with a starter box right off the hop. Starter box flywheel for that buggy should do the trick.
Thanks to all the GOOD people on this site!!

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maragos
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Post by maragos » Sat Mar 31, 2012 9:06 pm

did he explain to you why you need a bump start engine???
the only thing that you  will need to buy is the starter box...
i have i osmax 18 tz bump start on my firestorm and i use the standard engines mounts and a flywheel of my savage and is perfect mach...

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badboy
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Post by badboy » Sat Mar 31, 2012 10:20 pm

Maybe I misunderstood him?
BADBOY- Savage X: Picco .28,

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maragos
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Post by maragos » Sat Mar 31, 2012 10:47 pm

also i believe they use bump start engines because are lighter and more reliable.
imagine to be on a race day and broke the string on you pull start....

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badboy
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Post by badboy » Sun Apr 01, 2012 8:45 am

No doubt.  It looks like the easiest method for starting.
BADBOY- Savage X: Picco .28,

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Post by SLAYERDUDE » Sun Apr 01, 2012 11:39 am

Lowering the engine does 2 things - makes the flywheel closer to the chassis so the bumpbox wheel fits in the slot and grabs the flywheel good, and lowers the CG.
The chassis on the D8T would need to be ground out so the Axial .28 2S pullstart would fit in with the stock engine mount so I installed the optional bumpstart backplate, this also saves some overall vehicle weight and rotating mass on the crank which will help the engine wind out quicker.
Idle quality can suffer if you convert a pullstart engine to bumpstart because there's less rotating mass turning at idle (by removing the OWB parts that normally spin with the engine all the time), unless you use a heavier flywheel. On my Axial I just kept the idle gap open a little further and it would idle all day long.

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