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Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

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Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Old 08-21-2008, 01:43 PM
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Default Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

I am a pretty new to this whole entire nitro car field so I am a little confused on what I can do. When I was younger I owned a buggy (Team Associates) and a truck (Traxx). Both were electric and easy to setup.

I was wondering what exactly can I upgrade on this car? I have a nice body (supra) and I already made custom lights using a 9V battery.

What can I upgrade on the motor to make it faster? What do I need to look for if I want to get a faster/bigger motor?

I believe the person before installed a few upgrades including new springs and the 2 speed transmission.

here are some pictures.....I don't think that is the stock motor because I got a bag with the stock motor in it [X(]







I have a reciever and transmitter (futuba)....also do I need to cut holes in the body to cool the engine?




Any input is appreciated and I am very handy with motors, just not sure on compatibility and what not.
Old 08-21-2008, 01:56 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Get used to the nitro scene first, then go upgrade [8D]

There is different gearing, exhaust, clutch shoes, and some stickier tires. Much more, but that should start you off with more than enough.

A small-medium hole in the front and rear of the body would definitely help cold air get in and hot air get out. I have that on my on-road.
Old 08-21-2008, 02:43 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Thanks.....what do you mean by getting used to the nitro scene?
Old 08-21-2008, 04:02 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

what he means is since you have a fair idea on how electric rc cars work, get use to the nitro car because they are very different from electric rc cars.. find out some information on your car.. go to this [link=http://archive.hpiracing.com/?page=kits/heritage/n2-m.htm]link[/link] i think this is your car. if you want some simple hop ups look for things like new tires, maybe a set of sway bars.. and the woven graphite upper deck..
Old 08-21-2008, 05:02 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Just get used to messing around with the engine to make it run properly...and the speed of it
Old 08-21-2008, 05:13 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

okay thanks guys....I will start researching into it. I was hoping of learning how people drop in .21 motors in there.
Old 08-21-2008, 05:44 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Learn how to control it for now and then learn how to drop one into there
Old 08-22-2008, 02:17 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

You should take the head bolts out and turn the head 90 degrees so the fins run with the chassis of the car + cut out some holes in the front and rear windows for cooling
Also the exhaust looks standard so if it is maybe a good pipe + header
Old 08-22-2008, 11:04 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

okay I will try taking the head off and making the fins line up.

I was looking for an exhaust....what is a good one?
Old 08-22-2008, 11:17 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Sorry I wouldn't have a clue
But I'd expect the good brand ones to be fairly reasonable
Old 08-22-2008, 01:06 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

dude i think your tires are on wrong.. look at the direction on the tread pattern..
Old 08-22-2008, 01:43 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Yes they are wrong...but there's nothing to be improved...I hate the x-pattern when I need grip...but for powersliding and small drift game they're just fine!
Old 08-22-2008, 03:13 PM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Replace that little spring by the brake line with an equal length piece of fuel tube. The fuel tubing won't compress as easily resulting in the brakes biting better.
Old 09-02-2008, 10:23 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Gonna follow your lead got roller for25 bucks stay tuned. Check my Revo out in my gallery. My hpi will be sicker.
Old 09-02-2008, 10:59 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

engine is a smartech! i own one!
Old 09-03-2008, 11:22 AM
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Default RE: Got an HPI S4 Nitro 2 AWD.....what can I upgrade?

Its got some pretty good upgrades on it already...just change the engine and exhaust.

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