Aktion RC MRS4 The 540 Monster

[TheB1GDude]

Hi all,

This is my entry for the 1/18 scale competition that ends this week, let me give you some background - a few months back I purchased a 1/18 HPI Micro RS4 roller from reaper which I believe he got from xmod noob so it's been all around the world

I used some ProPulse parts to get it back up and running at which point it was fun but not really fast enough for me, in talking to reaper he mentioned a 540 motor mount for it so we did some research but couldn't find any of them anywhere however whilst looking around I came across a site that contained one of the most amazing chassis setups I've ever seen, they manufactured them in limited runs between 2004 and 2006 and finally sold of the remaining stock off in 2007, all attempts made to contact them via the web site failed and I was kind of bummed but not to be disheartened I continued to use the internet to research the two guys responsible for the chassis kits eventually finding one of their personal web sites, I shot him an email got chatting with him and convinced him to dig through his part boxes to see what he could find, amazingly he came across a complete Ice Blue SSG Micro Hybrid Conversion Kit:



This one was released in May 2004 in a limited less than 40 run, he combined the kit with a few of the new kit parts and sold it to me

So this is what I got:





The kit even comes with this nice little warning about it all being copyrighted and you not being allowed to rip them off



As you can see mine is signed which is totally going to increase future value Also don't think you can just go on eBay and pick one of these up, they are incredible hard to come buy as less than 500 chassis kits total where ever made.

The motor mount is from the newer style kit hence it's not in the same blue CF but it has been modified to accept a wider range of motor styles.



Overall the kit is amazing, everything fits together perfectly, they could have thrown in a Carbon Fiber bumper just to finish if of but otherwise this is one of the sickest platforms I have ever seen (oh and GPM make a CF bumper so I ordered one of those )

The one thing mine didn't have was the instruction manual and with all the supplied hardware:




It took a little trial and error to get it all assembled:




But eventually I was up and running with the stock motor mount:





Which incidentally I could have stuck with but that sucky little high torque ProPulse motor just wasn't cutting it:



What a rubbish top speed Instead I wanted to run this bad boy:



For those interested that's a 1/10 scale 15DT Team Mtronicks Racing 540 motor

You have to do a decent amount of sanding to get the motor mount to align right but here it is once completed:




and then installed:








As you can see it's a tight fit

At this point I still planned on using the ProPulse ESC and RX but as it turned out the ESC was damaged which I guess was a good thing because it probably wouldn't have supported that monster motor anyway So out comes the big boy in the form of a 1/10 Msonik 4 RV15 ESC funnily enough it pairs up perfectly with that motor (thanks reaper ) once that was installed this started to look a little bit more like the supercar it's supposed to be:





At this point I still had a number of parts on order so I moved on to the body, you need something wide to fit the chassis and as I didn't want to spend anymore money on this I used what I had purchased from Dale which was a 150MM Vauxhall Calibra DTM Bodyshell as it turned out it wasn't quite wide enough but as I had done all the painting and sticker work I stuck with it:









Stickers are courtesy of Xmods International.

These are my most recent photos:























Some of which you may recognize from my competition entry.

The final parts list is as follows:

1/18 HPI Racing MRS4
1/18 Aktion Racing Ice Blue SSG Micro Hybrid 540 Conversion Kit
1/18 150MM Vauxhall Astra DTM Bodyshell
1/18 ProPulse Racing 27MHz FM Receiver
1/18 HPI SF-1 Servo (Standard Torque)
1/18 GPM Graphite Bumper Plate
1/18 Universal Micro Antenna Mount
1/10 Msonik 4 RV15 ESC
1/10 15DT Team Mtronicks Racing 540 motor
1/10 30T Robinson Racing 48 Pitch Pinion Gear
1/10 Associated Vcs Micro Shock
1/10 Associated Spring Blue Medium
1/10 Associated 25wt Shock Oil
Custom 7.2V 6-cell Elite 2200 4/5SC Nimh pack

Let me know if you have questions or want to see something specific hopefully you will like this as much as I do.

Questions and comments welcome.

[pinsk17]

Sweet project man. Whats the top speed now?

[TheB1GDude]

Originally Posted by pinsk17

Sweet project man. Whats the top speed now?

Thanks and I actually don't know I need to make a charging cable that is compatible with my charger so I can fully charge the battery pack, give me a few days and I will let you know.

[mycrors4]

im so buying this once u get bored of it.. lol

how does it handle compared to the stock chassis?

[TheB1GDude]

Originally Posted by mycrors4

im so buying this once u get bored of it.. lol

how does it handle compared to the stock chassis?

Amazing.... but you have to relearn to drive you have so much power that you have to take it easy when pulling away or turning as if you gun it you just spin out, the chassis is stiff and nice and wide so you just coast through the corners and hit the gas when you come onto the straight and boom nothing can touch you I will see if I can get someone to drive my BL ProPulse against it and I'll video it.

[mycrors4]

Originally Posted by TheB1GDude

Amazing.... but you have to relearn to drive you have so much power that you have to take it easy when pulling away or turning as if you gun it you just spin out, the chassis is stiff and nice and wide so you just coast through the corners and hit the gas when you come onto the straight and boom nothing can touch you I will see if I can get someone to drive my BL ProPulse against it and I'll video it.

how much power are we talking?!?!?

check this out for speed tests (for a brushless motor)

it says im giving out 0.4hp on my rc18 is it more powerful that that?

http://www.scriptasylum.com/rc_speed/_top_speed.html

how's the grip on the stock tires? cause ive heard that this conversion has amazing grip for the power it has

[Donziikid]

Ah, this is what you've been hiding! Very nice. That shade of blue is certainly nice.

Cheers,
Kyle.

[TheB1GDude]

Originally Posted by mycrors4

how much power are we talking?!?!?

check this out for speed tests (for a brushless motor)

it says im giving out 0.4hp on my rc18 is it more powerful that that?

http://www.scriptasylum.com/rc_speed/_top_speed.html

how's the grip on the stock tires? cause ive heard that this conversion has amazing grip for the power it has

I will try to charge and dyno it tomorrow its hard to say just how much power but image a 1/10 car that weighs that of a 1/18

Stock tires are OK, I have the foam RCP ones which I prefer they just don't look as good on the car Because the chassis is wider and the motor makes it heavier you do get better traction, I haven't been able to roll it so its really stable it just spins out if you gun the throttle.

Originally Posted by Donziikid

Ah, this is what you've been hiding! Very nice. That shade of blue is certainly nice.

Cheers,
Kyle.

Yeah shinny blue carbon fiber

[mycrors4]

Originally Posted by TheB1GDude

I will try to charge and dyno it tomorrow its hard to say just how much power but image a 1/10 car that weighs that of a 1/18

Stock tires are OK, I have the foam RCP ones which I prefer they just don't look as good on the car Because the chassis is wider and the motor makes it heavier you do get better traction, I haven't been able to roll it so its really stable it just spins out if you gun the throttle.



Yeah shinny blue carbon fiber

this makes me wanna truck and buy this and drop it in the rc18 LOL

http://www.castlecreations.com/produ...a_monster.html
+
http://www3.towerhobbies.com/cgi-bin...?&I=LXXEN6&P=7
+
3s lipos..

[TheB1GDude]

Originally Posted by mycrors4

this makes me wanna truck and buy this and drop it in the rc18 LOL

http://www.castlecreations.com/produ...a_monster.html
+
http://www3.towerhobbies.com/cgi-bin...?&I=LXXEN6&P=7
+
3s lipos..

wow thats big... the chassis would support it I just don't have the money This was a budget build and it wasn't cheap....

[mycrors4]

Originally Posted by TheB1GDude

wow thats big... the chassis would support it I just don't have the money This was a budget build and it wasn't cheap....

lol what is cheap these days? a pack of gum is like.. like $10! lol

[TheB1GDude]

So after building such a sweet ride I've been really really really lazy with it, I ran it once until the batteries died on me and then couldn't be bothered to build the deans charge cable I needed but today I decided to get myself in gear make the cable and get some juice back into those cells.

Unfortunately I was only able to charge it for 25 / 30 minutes before my wife dragged me out but I did throw it on the dyno to get a quick reading of its top speed capabilities:





Not to bad I guess for batteries that aren't fully charged... thats 33.6MPH to save everyone having to convert it themselves.

I will get them back on the charger and see if I can improve on it.

[TheB1GDude]

Well I fully charged the pack this morning and re-ran it on the dyno:



I also switched from foam to slick tires so I think this is probably the fastest it's going to go.

60 km/h equals 37.3 mph

It maybe faster than that but I struggle to keep it on the dyno so I won't make any claims I can't backup

[96SVT281]

wow thats fast just question about the foam tires are those mainly for actual tracks??

[TheB1GDude]

Yeah foam tires are for extra group on RCP tracks, they give you a bit better traction on certain other household surfaces but I was worried I was loosing traction on the dyno so switched back to rubber slicks.