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How do I increase my top speed?

Old 08-29-2004, 06:05 PM
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Catman314
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Default How do I increase my top speed?

I have a RS4 3 Type SS kit which is stock and was wondering what would I need to do and what parts would I need in order to increase the top speed? How much speed can I expect? Thanks
Old 08-30-2004, 01:20 AM
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toyturbo
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Default RE: How do I increase my top speed?

Just get a taller gear ratio, or throw a two-speed in there if it don't already come with one.
Old 08-30-2004, 09:34 AM
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nitromorto
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Default RE: How do I increase my top speed?

when you say taller gear ratio, do you mean more teeth on the spur gear?
Old 08-30-2004, 10:23 AM
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Default RE: How do I increase my top speed?

ORIGINAL: Catman314

I have a RS4 3 Type SS kit which is stock and was wondering what would I need to do and what parts would I need in order to increase the top speed? How much speed can I expect? Thanks
No parts needed, here's the secret to increase top speed: Throw it off a cliff. (LOL just kidding)
Old 08-30-2004, 12:19 PM
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vwcalbug
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Default RE: How do I increase my top speed?

hmmm....i forget what the max velocity of something falling through the air is....so i can't tell you how fast it would go

I would say tie a rope to it and pull it behind a car - Justin
Old 08-30-2004, 05:16 PM
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Boost-Dragon
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Default RE: How do I increase my top speed?

9.8 m/s2 if you still have the stock engine try 41/45 with the stock pinions or 39/43
Old 08-31-2004, 05:12 AM
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Catman314
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Default RE: How do I increase my top speed?

Today I installed a 45/41 and a 19/23. I notice that the car shifts into second alot sooner than before. Is that a good or bad thing? Am I losing any speed that way?
Old 08-31-2004, 11:10 AM
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Default RE: How do I increase my top speed?

i want to get 17/21 pinions does any1 know if it will increase top speed? also, catman i think that would be normal.
Old 08-31-2004, 11:27 AM
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Default RE: How do I increase my top speed?

ORIGINAL: nitroracer20

i want to get 17/21 pinions does any1 know if it will increase top speed? also, catman i think that would be normal.
What is your current gear combo? Keep in mind one real fact, as you increase the size of your pinion gears in an effort to gain speed, you adversly loose acceleration. Dropping the pinion size increases acceleration. Yes, bigger pinions means "in theory" you should gain speed, but you need to know the hp limits of what your current engine can handle. If you have the stock HPI .12SS, I am sure you will loose overall speed. because the engine just doesn't have enough space to allow the higher speeds you are trying to achieve. If you have a HUGE parking lot, a .12 engine might be faster by higher gearing, but from what I have found, even the stock 18/22 gearing on my SS was too high. My SS was a dog accelerating at your average size parking lot. I dropped down the the 17/21 gearing and what a huge difference in acceleration.
Old 08-31-2004, 12:34 PM
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Default RE: How do I increase my top speed?

i am totaly confused, which gears will i get extra speed with. NOw i run stock gearing with a .15fe motor. BTW the car is a hpi nitro rs4 3 rtr.Thanks
Old 08-31-2004, 12:41 PM
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viperspeed333
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Default RE: How do I increase my top speed?

For top Speed, use 19/23t for pinion gears, and 41/45t for spur gears. You could also try 37/41t for spur gears, which will give you even more top speed, but the stock configuration of the RS4 wont let the pinion gears mesh with spur gears this small, so you would need to make some modifications as well.
Old 08-31-2004, 01:04 PM
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Default RE: How do I increase my top speed?

thanks alot
Old 08-31-2004, 06:39 PM
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aznx2fine
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Default RE: How do I increase my top speed?

how can you run a 15fe? the ss doesn't come with that, it comes with a .12, but anyways, the tallest gear ratios hpi has for that two speed are the red pinion gears, and the spur gears that you need to use with those pinions are shown in the instructions that come with the pinion gears, but i don't recommend you use th 15 fe to turn that ratio, just not enough power, i dropped a .18 hot bodies into mine, lol.
Old 08-31-2004, 06:53 PM
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nitroracer20
 
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Default RE: How do I increase my top speed?

i run a rs4 3 rtr
Old 08-31-2004, 06:59 PM
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Default RE: How do I increase my top speed?

the 23/19 pinions are the red 1s
Old 09-01-2004, 06:51 PM
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Boost-Dragon
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Default RE: How do I increase my top speed?

yea try a moderate .18 sport engine for bashing purposes and then step up the gear ratios
Old 09-01-2004, 07:15 PM
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Default RE: How do I increase my top speed?

tru
Old 09-02-2004, 05:04 PM
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SS Nitro
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Default RE: How do I increase my top speed?

Ok get here are some things you could do

Light weight flywheel(takes stress off of the engine)
Light weight chassis( takes a little bit of weight off the overall car)
More powerful throttle servo with a servo saver(quicker time off the line)
Motor savor airfilter
New engine( preferably a .12 takes some wieght off of the car and still provides a lot of power)
An aerodynamic body
Battery pack to take off some weight
You can order some graphite and create your own parts.
A 2 speed if you don't have one.
Better clutch for good grab and faster off the line experience.
Taller gear ratio
a nice tuned pipe
if cars have one, take the restictor off the carb( nice increase)
Old 09-02-2004, 05:08 PM
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SS Nitro
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Default RE: How do I increase my top speed?

I use to run one of those but traded it for a savage 25.

If you know where I can get a nitro rs4 3 evo cheap, can you give me a link? Those things were so fast.

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