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Slot.it Nissan GT-R GT3, 2022 DiSCA GT3 Spec

9301 Views 72 Replies 10 Participants Last post by  tamar.nelwan
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Having finally received my long awaited Nissan(s) and posted on their appearance in stock form ...
..they may stay like that until we return from Rockingham's Tres Petit Le Mans...but def not much longer...
... as the #23 car will be raced by my team @ Suzuka in the DiSCA GT3 race of Jan 29th 2022.
So this topic will be on how we'll prep the car(s) to DISCA GT3 spec, meaning chipping it adding lights (that will be fun)
And the fabrication of some flexible lightweight components (vacformed interior & windows, laser cut rubber rear wing mounts)
Team might even have even a certain Italian guest driver. ( and no this time that's not Grunz)

Tire Land vehicle Car Vehicle Wheel


Hard Nut to crack.

This specific Italian gentleman has given me a very hard nut to crack, cause when I check the reference pictures of this exact car...
...and compare it to the Slot.it car, I can only find some extremely small areas where I can possibly improve the stock car.
More than happy to extend the black on the side skirts, as reported masking on stock car not really a match to the fine finish of the rest of the car
Wheel Tire Vehicle Car Automotive tire


And there are the solid rearwing supports, these can be lasercut from rubber with some of the openings of the 1/1 wing.
Can also extend the slots for the supports further down the trunk, will give the rubber supports even more room to "Flex"
But look at the detail, Tail lights surrounds painted in correct color...even that embossed Nissan logo is represented on the Slot.it car

So..make note, add red tow band and some mesh in the lower grille. Rear window seems to have a split frame underneath (decal?)
The only thing that looks a bit "off", is the back end of the roll cage...but haven't been able to score good ref pictures of it.
Wheel Car Tire Vehicle Automotive design


Chassis
DiSCA GT3 rules have a more (box) standard approach , so no trick pod mounted diffuser on this car.
Stock screws already replaced with SV Workz Titanium M2.2. Side suspension will be fitted.
Not clear yet if 1,0mm Offset Evo pod will give 1,8mm Ground clearance under motor with 20,8mm ø Scaleauto Procomp wheels.
Regs require running Scaleauto Baby Sprinter motor, hope that won't piss off "Italian guest driver" too much.
But then again Pace car he will also drive will be fitted fully with stock parts...including stock traction magnets :oops:
Yep you read it right, Traction magnets, nobody is going to bump the Official Pace car off the track on the formation lap(s), as previously happend at Le Mans 😇

Oxigen
O201C chip obvious choice here, testing will determine if it should be mounted longitudinal or transverse (weight distribution)
Good thing about running that big GT-R is...plenty of real estate on chassis for either configuration.

Body works
Side skirts will be cut of chassis and glued to body, most likely will do the same for the front splitter to allow independent set-up of body and chassis.
4 small Body supports will be mounted in body right in front of rear wheels and behind front wheels.
4 grub screws will be added in chassis underneath to adjust ride height. Been there done that...doing it next month
Dive plates are integrally moulded with the body, pretty sturdy too...will have to see how those will withstand the challenges of Digital racing.

Stock body now at 23,7 total. Vac formed but detailed interior should save 3,5- 4,5 grams off. Not too much gain expected from vacformed windows...
...as plastic windows are already at minimum. So estimate maybe 5 -6 gr max from total vacformed parts.
Which mean there will stil be a lot of (careful) dremeling & scraping to get the whole body down to 14-15 gr...so there's room enough for.....
Automotive lighting Product Black Motor vehicle Font


Light(s)..let there be
Estimate 3,5 gr needed for SP44 light kit to power plenty of LED's, Slot it has moulded front lights as separate parts, so these can be done off the car.
The only Jazz I might be able to add will be some pretty purple led light peeking through the front grille.
That is unless DrC and Flag Slot manage to get their "functional LED Number/ Position Display" functional in the next month.
Oh.... good finally see somewhere I can cut into the body, opening up the bumper for the bottom purple leds :)
Automotive tail & brake light Vehicle Hood Automotive lighting Car


Ok that's it for now, got my to do list for the Nissan(s) but next update will have to wait till next month... but definitely

To be continued

With kind regards
Tamar
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Back to Basics
Hello Slotfriends, with the Rockingham race now well behind us (still recovering) and Suzuka next on the calendar, its about time to start working on the Nissan GT-R and build it too DiSCA GT3 spec.
Its been a while since anyone posted on the specs of such a slotcar...
So for starters here's a breakdown of what parts are needed and which areas need attending.


Circuit component Electronic component Engineering Rectangle Electronic engineering



0: Scaleauto Procomp4 20,9mmø, Stock inserts fit (more info on that subject will follow in a later post)

1: Motorpod, two options here, Safe one would be 0,5 offset, critical one would be 1,0mm offset. 1,0 barely makes 1,8mm GC on new wheels and would require motor to be raised by 0,2mm.
Ideal would be a 0,75mm offset...but that unfortunately does not exist as an AW in the Slot.it range.
For all options ballbearing type preferred.

2: Slot.it 16mmø AW Spur, gearing most likely 12x28.

3: You can use the stock (6,5mmO) Slot.it pinion or when motor pod modified you can also use Sigma/ Scaleauto/Mitoos M50 nylon 12t (6,8mmø)

4: Use of evo -Side suspension preferred but will need some material to be removed from body (side intakes) for clearence.

5: Scaleauto Baby Sprinter Motor SC-0027b (Long can Boxer type) Don't forget to mount Slot.it Endbell adaptor upside down.

6: Hall sensor to the right mounted on foam pads.

7: DiSCA rules require 1,8 Ground Clearance C under the centre of the motor. The reason for this is that first of all we did not want the GT3 cars to have too much motor magnetism. Secondly we wanted specs that would be achievable by all brands with as much off the shelf parts as possible. Stock NSR cars are well above that 1,8 GC under the motor.
For the Nissan to clear 1,8 GC with a 1,0 offset pod, two 0,5mm shims are needed to lift front of pod to position Motor level with techblock/track rails.

8: Protect base of antenna with some 2k glue and Shrinktube. Funny detail, wanna know how tall the Nissan body is? well the O2 Antenna fits under body in almost fully upright position. 😂

9: O201C1 chip mounted @ 90˚ on foam pads. Stock chassis has some nice locator pegs to correctly fix the chip correctly over the various LC Led openings. Clicks right in place. But I would advice a more "soft" placement to isolate chassis vibration and dampen forces during inevitable digital crashes.

10: Stock plastic Front wheels are fine, true and glue stock front tyres. With superglue coating total would be ≠ 20,2mmø. Inserts pop right out, you could drill some holes in the back face of the rims, safes a bit of weight and makes removing inserts even easier.

11: Now we are arriving at a problem area. With the stock guide the front of the chassis sits a bit high.
Straightening the chassis as I described in this post has cured this. Will repost it here at a later stage.
Stock "clip in "guide is limited in guide ride height adjustments, best candidate for replacement/upgrade would be the new Slot.it Ch89b guide.

12: With Chassis straightened the body rests much better on the chassis...but due to profile of front splitter how the body rests on the chassis will vary under acceleration and braking.
My preferred option would be to cut the Splitter and side skirts and mount them to the body. That way you can adjust Body ride height and Chassis ride height independently. (all allowed by DiSCA GT3 rules)

Ok that's it for now Gents
to be continued

With kind regards
Tamar
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Back to Basics
Hello Slotfriends, with the Rockingham race now well behind us (still recovering) and Suzuka next on the calendar its about time to start working on the Nissan GT-R and build it too DiSCA GT3 spec.
Its been a while since anyone posted on the specs of such a slotcar...
So for starters here's a breakdown of what parts are needed and which areas need attending.


View attachment 289110


0: Scaleauto Procomp4 20,9mmø, Stock inserts fit (more info on that subject will follow in a later post)

1: Motorpod, two options here, Safe one would be 0,5 offset, critical one would be 1,0mm offset. 1,0 barely makes 1,8mm GC on new wheels and would require motor to be raised by 0,2mm.
Ideal would be a 0,75mm offset...but that unfortunately does not exist as an AW in the Slot.it range.
For all options ballbearing type preferred.

2: Slot.it 16mmø AW Spur, gearing most likely 12x28.

3: You can use the stock (6,5mmO) Slot.it pinion or when motor pod modified you can also use Sigma/ Scaleauto/Mitoos M50 nylon 12t (6,8mmø)


4: Use of evo -Side suspension preferred but will need some material to be removed from body (side intakes) for clearence.

5: Scaleauto Baby Sprinter Motor SC-0027b (Long can Boxer type) Don't forget to mount Slot.it Endbell adaptor upside down.

6: Hall sensor to the right mounted on foam pads.

7: DiSCA rules require 1,8 Ground Clearance C under the centre of the motor. The reason for this is that first of all we did not want the GT3 cars to have too much motor magnetism. Secondly we wanted specs that would be achievable by all brands with as much off the shelf parts as possible. Stock NSR cars are well above that 1,8 GC under the motor.
For the Nissan to clear 1,8 GC with a 1,0 offset pod, two 0,5mm shims are needed to lift front of pod to position Motor level with techblock/track rails.

8: Protect base of antenna with some 2k glue and Shrinktube. Funny detail, wanna know how tall the Nissan body is? well the O2 Antenna fits under body in almost fully upright position. 😂

9: O201C1 chip mounted @ 90˚ on foam pads. Stock chassis has some nice locator pegs to correctly fix the chip correctly over the various LC Led openings. Clicks right in place. But I would advice a more "soft" placement to isolate chassis vibration and dampen forces during inevitable digital crashes.

10: Stock plastic Front wheels are fine, true and glue stock front tyres. With superglue coating total would be ≠ 20,2mmø. Inserts pop right out, you could drill some holes in the back face of the rims, safes a bit of weight and makes removing inserts even easier.

11: Now we are arriving at a problem area. With the stock guide the front of the chassis sits a bit high.
Straightening the chassis as I described in this post has cured this. Will repost it here at a later stage.
Stock "clip in "guide is limited in guide ride height adjustments, best candidate for replacement/upgrade would be the new Slot.it Ch89b guide.

12: With Chassis straightened the body rests much better on the chassis...but due to profile of front splitter how the body rests on the chassis will vary under acceleration and braking.
My preferred option would be to cut the Splitter and side skirts and mount them to the body. That way you can adjust Body ride height and Chassis ride height independently. (all allowed by DiSCA GT3 rules)

Ok that's it for now Gents
to be continued

With kind regards
Tamar
Fabulous post Tamar! I’ll have to buy at least two more GTR and try an Aw set up 😀
Glad you like it, almost 99% of what I have written in the "Back to Basic" post could be done while still respecting most generally used "Stock /Standard" Club tech rules.
What will follow...won't...as then we'll be entering deeper into DiSCA territory 😇

With kind regards
Tamar
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Nice Tamar. The only thing that I would add is that 12/28 is a bit too short especially with that crazy baby sprinter motor! ;-)
Especially on large tracks, I go for a 14 pinion (sigma) and 26 spur...and then working around that.
Hello Gio
Just covering the basics in my first post, and for once starting with a relatively "stock" set up first, and then like mentioned before, going deeper in to DiSCA territory step by step.

So for the Nissan with its AW slot.it pod a "stock ratio" would be a 12x28 gearing, which could very easily without any modification be changed to 12x26 (2,17 ratio) which is very close to 14x30 (2,14 ratio)
And you do need to take in account that for 2022 DiSCA GT3 will run on the taller Procomp4 (20,9mmø) wheels.
So if you calculate the theoretical max speed M p/s 12x26 would actually give you a higher max M p/s than 14x30.

With kind regards
Tamar
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Re Tamar's post number 21 - Back to Basics...

The man starts his list of 'thing to do' at 0.

Not 1. But 0.

Right there, that is the difference between someone who knows what they are doing and me...

Looking forward to more on this Tamar!
that is the difference between someone who knows what they are doing and me...
LOL, only when it concerns covering up f***k ups, I'd finished the image with numbers and written the list and then realized that I had forgotten about the wheels...and as I had conveniently sequenced and placed the numbers left to right...
and didn't want to redo the image....the only solution was to add...a zero 😇

With kind regards
Tamar
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LOL, only when it concerns covering up f***k ups, I'd finished the image with numbers and written the list and then realized that I had forgotten about the wheels...and as I had conveniently sequenced and placed the numbers left to right...
and didn't want to redo the image....the only solution was to add...a zero 😇

With kind regards
Tamar
I assumed you were being thorough by covering the important 'stuff' between 0 and 1...!
My GT-R(s) have finally arrived and I have been working on them for 2 days in a row and I am not still done.
And this is not even a whitekit...Yesterday I managed to do two lexan interiors (which I will need to paint - adding one more day to finish this project).
It is truly a magnificent model. Will post the work I did on mine on another post.
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By the way, how is the Slot.it Nissan GT-R with Stefan's chassis? Because out of the box, it's not great. Either the CG is too high or the chassis is too stiff.
As a reply to Atobit's question in an other topic and a small sidestep to reboot this one.
First of all ..must say I have different experiences with the Nissan. Sure enough its CG is high(er) than most GT’s but… Two Nissan’s were build for last May’s Suzuka Double Digital. One in GT3 ( by Dave Maddock) and one in WEC spec ( by Gary) and both were extremely competitive with a simple set-up on a stock chassis.

But as Claude mentioned..his experience with the Nissan is on wooden track...mine/ours is on plastic track.
Lower grip, less penalty for a higher CG. on Plastic track a higher centre of gravity can even be beneficial to generate more grip.
Claude also mentioned that he thought that maybe the stock chassis was too stiff. Well from my experience, wooden tracks, more grip requires a stiffer chassis.
So if you can elaborate a bit more on what your handling problems are Claude...please inform us.
And for those of you that are looking for more grip (and like to preserve those nicely filled wheelarches) slip on a set of the new 1323 moulded slot.it G25 or F22 tires.(y)

As for the Prospeed Chassis that Stefan Nalbach designed for the Slot.it Nissan. What's available via his webshop right now is just the basic design he does for most of the slot cars. Contoured to fit the Slot.it GT-R body, with the correct body mount positions. With the Flex-slots it could be more flexible that the stock Nissan chassis.
But this version is for an NSR type pod so less suited to mounting an Oxigen chip than the stock chassis.
The advantage of the ProSpeed chassis is that you can use it in combination with the ProSpeed (NSR type) pods which are a bit narrower so an easier fit if you want to use side suspension...and are available in a wider and different range of offsets.

But be aware that Slot.it is in the process of fabricating an uprated/upgraded version of its own Evo AW pod with bigger offset than the current 1.0mm.
So stock alternatives will become available.

With kind regards
Tamar
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Small update for the Nissan fans.
Got the rear wing supports laser cut this week, done two versions. A basic solid one...and a much more detailed "open version"
Bringing some over to the UK for the Rockingham 6hrs GT3 race. So should be tested on one of the Nissan's running this weekend.
Should be available from SV Works website in September.

From left to right: 1 Remove stock supports from rear wing, make sure you've got a clean contact patch. Mark position of supports.
2 Enlarge opening for supports where required (pictured here "solid" version) with small key file.
3 Testfit wingsupports and apply a small amount of medium (not so fast drying) Superglue on the top of the supports. Place rear wing in correct position on top of supports.
4 Final result...nice scale but flexible rear wing supports (pictured here the "open" version)


With kind regards

Tamar
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I still can’t get my Nissan GTR to the pace of the Maserati @tamar.nelwan
I fitted some spacers in the motor mount to lower the stance of the car, it’s running on Slot it G25(thinking about changing to Scaleauto AS25), both cars (GTR and Mase) with same gear ratio , the GTR is to the max width possible in the front axle and the rear almost to the width of the body but still not visible from upper side view, also changed the braids for some ultra thin Sloting Plus, has some ballast (about 5-7gr) in the middle -front section of the chasis and of course the front tires just barely touch the track.

But it’s still +-2 tenths per lap behind the Mase ☹, not fair I want to race the GTR but the Mase is the best shot I have by now 🥲
The detailed supports look very good. I hope they work well.
Hi Tamar,
I comeback on this topic. Why have you choose sponge tyres instead of rubber ones?
Sorry for my ignorance, I though sponge tyres were commonly used on 1/24 scale but not on 1/32.
For some of the DISCA races, we need to use scaleauto sponge tyres.
For some of the DISCA races, we need to use scaleauto sponge tyres.
Wood track right?
No, Ninco

We’ve been racing using the ProComp3 (and now 4) for DiSCA GT3 on Ninco track since 2015.
No, Ninco

We’ve been racing using the ProComp3 (and now 4) for DiSCA GT3 on Ninco track since 2015.
Wow! I thought sponge tires would be torn apart on the abrasive surface of Ninco track 😯
The idea is that they do have to be "torn apart" ;-)
More seriously, Tamar and Gary have done a lot of testing when this rule set was put together.
The Procomp 3 rate of wearing on Ninco is good enough for a race of 1 to 1,5 hour.
The DiSCA GT3 Euro Series was set up such that teams have to use some strategy to with tyres.
Initially, the organisers handed out 2 sets of tyres and that was all that you got for practice, race 1 and race 2.
At the beginning of each race, the cars must have a clearance of 1.8 mm under the motor.
So you had to use both tyres over the practice session without wearing them too much otherwise you would not pass the 1.8 mm (I learned this the hard way on my first race).
I think it was (and still is) a very good race format.
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