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Old 12-10-2012, 03:44 PM   #1
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Default Need help to find which model HPI RS4 I have.

Aye fellas,

I just got this HPI RS4 road car for free. I need help to see what model rs4 this is. It seem like an older rs4 with a .15fe engine along with the old style carb that has one needle setting. It's a shaft driven, not a belt driven style.

I looked on HPI upgrade exchange program. I was looking at one of their nitro engines. Which engine will work in this chassis? I need a short crank or long? Can I keep my parts from the .15fe engine to the new engine?

I'd like to build it as well. It'll be my 1st on road car.

Last edited by Mr.JayDeeM; 12-10-2012 at 06:02 PM.
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Old 12-10-2012, 07:24 PM   #2
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Aye fellas,

I just got this HPI RS4 road car for free. I need help to see what model rs4 this is. It seem like an older rs4 with a .15fe engine along with the old style carb that has one needle setting. It's a shaft driven, not a belt driven style.

I looked on HPI upgrade exchange program. I was looking at one of their nitro engines. Which engine will work in this chassis? I need a short crank or long? Can I keep my parts from the .15fe engine to the new engine?

I'd like to build it as well. It'll be my 1st on road car.
Can you post pic.
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Old 12-10-2012, 08:08 PM   #3
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without a pic its kind of hard, but here is what i know. if its a shaft driven car and has a 15fe with a purple cooling head, its likely a nitro rs4 3, an early version of it. if its shaft driven with 15fe and has a head with vertical fins its may be a super nitro rally.

hpi uses long shaft engines on every touring car i can think of. you will be able to keep the clutch, clutchbell and flywheel, and depending on what motor you get, the header and tuned pipe. depending on what motor you get you may need to get a set of engine mounts, hpi likes to build them into some motors. look around at other engines, the engine exchange isnt that great a deal, you can often get engines cheaper through a hobby shop or online without the exchange, even hpi engines.
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Old 12-10-2012, 08:34 PM   #4
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For some reason, Im not allowed to post any pictures. I just joined this forum today. I'm new. But not new to Rc's

Back to Hpi, it has the purple short cooling head and street tires. So, its a rs4 3 perhaps? How come the upgrade is not always good? I thought about getting their 3.0 .15/.18 engines they have listed for $65?
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Old 12-10-2012, 10:19 PM   #5
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that would be an early nitro rs4 3.

i guess hpi smartened up, last time i looked at the engine exchange it would have cost me more to exchange than to buy a new motor at my lhs. just keep in mind you will have to pay for shipping, and that buying a new hpi g or t 3.0 is between $10 and $20 more than the exchange price.
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Old 12-11-2012, 05:10 AM   #6
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Has it a shaft over the middle or belts to drive the front and rear axles?
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Old 12-11-2012, 05:25 AM   #7
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that would be an early nitro rs4 3.

i guess hpi smartened up, last time i looked at the engine exchange it would have cost me more to exchange than to buy a new motor at my lhs. just keep in mind you will have to pay for shipping, and that buying a new hpi g or t 3.0 is between $10 and $20 more than the exchange price.
So, which engine will work with my rs4 3 that is listed under the upgrade program?

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Has it a shaft over the middle or belts to drive the front and rear axles?
Shafts in the middle.
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Old 12-11-2012, 06:47 AM   #8
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Then it is the mentioned RS4-3 or later (basicly not much has chaged up until now than in major the engine and gearing.
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Old 12-11-2012, 03:38 PM   #9
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Then it is the mentioned RS4-3 or later (basicly not much has chaged up until now than in major the engine and gearing.
So, I can run the new engine that is in the new rs4 such as the T3.0 or the G3.0? Which engine would be better?

Does anyone know if the older .15FE flywheel, and so forth is swappable for the new engine? Do I have a long crank or the short crank?
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Old 12-11-2012, 09:05 PM   #10
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After some research, hpi t3.0 is for on road and g3.0 is for off road. The stock, .15fe is .6hp while the new hpi direct fit t3.0 is 2.2hp. Holy Crap.... Spur gear might can't handle it... >
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Old 12-11-2012, 10:15 PM   #11
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power numbers are greatly inflated. the t3.0 is actually around 1hp. its a decent sport motor.
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Old 12-12-2012, 06:57 AM   #12
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I just want to comfrim, is it a direct fit though?
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