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Losi Double XT CR Modern Racer

Posted: Fri Feb 28, 2025 8:24 pm
by Charlie don't surf
Picked up a super sweet XXT CR off eBay last week!

Trinity screws throughout-
Titanium hinge pins, ball studs and turnbuckles-
Fantom front brace and transmission brace-
Mk1 lightened motor plate-
New Hydradrive-
HG 2.61 Diff gear installed-
MIP shiny CVDs-
Ball Bearing steering rack-
ZERO broken or overly worn parts-

Truck will be mildly modernized, 12mm hex setup front and rear, B4.2 slipper setup, aluminim steering rack, probably HD ballstuds and cups....probably and new transmission option....
Pretty stoked. This truck will put my LXT racer on hold, as this is far better anyway you look at it.

It was also dirt cheap.

Re: Losi Double XT CR Modern Racer

Posted: Fri Feb 28, 2025 10:03 pm
by RC10th
I'm not a losi guy but that is a nice truck.

It needs purple aluminium hardware though :mrgreen:

Re: Losi Double XT CR Modern Racer

Posted: Sat Mar 01, 2025 12:11 am
by Johanp
Nice truck!
Let's go racing! :)

Re: Losi Double XT CR Modern Racer

Posted: Sat Mar 08, 2025 8:49 pm
by Charlie don't surf
Spent a little time with the truck while I wait on parts.

B7 HD ballstuds and ball cups work flawlessly-

Found a couple tricks to lower the truck and raise the roll center-

Waiting on alloy steering rack, servo, transmission cases, hex wheels and hex adaptors, all the rest of the electronics...again lol, tires and a few small bits.

Re: Losi Double XT CR Modern Racer

Posted: Fri Apr 04, 2025 6:27 pm
by Charlie don't surf
More done today since I was home sick from work.

Aluminim steering rack is in, as is the new Saxox BE servo (the lead is too short by 50mm lol) slipper installed, SC10 rear hexes and Z3D front hex adaptors...im.sure there are things I'm forgetting.

Re: Losi Double XT CR Modern Racer

Posted: Sun Apr 13, 2025 7:55 am
by Charlie don't surf
I know this forum isn't very race oriented, however this may help others that are vintage racing-

We used to do this in the 2010 range to Proline Holeshot M3 tires. Diesel was the sauce of choice but the rubber would swell so much that the tire would be clapped out in three runs.

Diesel isn't the sauce anymore, but the Jconcepts Ellipse in green is a prime tire to slick off, instant traction with little break in since it's thin...but at a cost, three to seven runs and they clap out and the handling goes away. Sooooo....we're going to Cut N' Shut the tire by removing 30mm across the carcas and re-gluing the tire on a standard foam, leaving a tighter tire to the foam, and a smaller diameter to help lower the truck another 2mm.

Here is the start

My glue is all bad...so it will have to wait until Tues eve for the final

Re: Losi Double XT CR Modern Racer

Posted: Sun Apr 13, 2025 8:31 am
by Elkcycles
Cut'n 'n Shut'n... good times. I did a lot of that in the early crawler days to make comp tires.

Do you stretch then glue and sauce, or sauce first and glue afterward?

Re: Losi Double XT CR Modern Racer

Posted: Sun Apr 13, 2025 9:02 am
by Charlie don't surf
Elkcycles wrote: Sun Apr 13, 2025 8:31 am Cut'n 'n Shut'n... good times. I did a lot of that in the early crawler days to make comp tires.

Do you stretch then glue and sauce, or sauce first and glue afterward?
Just glue, then a light scuff with grey scotch brite to get any excess off the outside of the tire. The slicked ellipse is very thin so the stretch isn't a problem at all

Re: Losi Double XT CR Modern Racer

Posted: Sun Apr 13, 2025 9:40 am
by Dangeruss
Charlie don't surf wrote: Sun Apr 13, 2025 7:55 am I know this forum isn't very race oriented, however this may help others that are vintage racing-
...but wouldn't it be great if it were? 8)

Pit Tips was one of the be best parts about RCCA back in the day.

(Couldn't resist making a Pit Tip out of Charlie don't surf's post)
Traction Tactics.jpg

Re: Losi Double XT CR Modern Racer

Posted: Sun Apr 13, 2025 9:53 am
by Charlie don't surf
Dangeruss wrote: Sun Apr 13, 2025 9:40 am
Charlie don't surf wrote: Sun Apr 13, 2025 7:55 am I know this forum isn't very race oriented, however this may help others that are vintage racing-
...but wouldn't it be great if it were? 8)

Pit Tips was one of the be best parts about RCCA back in the day.
With the momentum of vintage racing, it's not a bad idea at all

Re: Losi Double XT CR Modern Racer

Posted: Tue Apr 15, 2025 9:11 pm
by Charlie don't surf
Tire glue carne today, late day at work so I only knocked one tire out. Here's what I have now. The stock tire is 100mm, the -30mm tire on stock foam is 96mm, not as dramatic as it seems...but that's still 2mm less ride height and on a Truck with super high grip tracks that only helps everywhere

Re: Losi Double XT CR Modern Racer

Posted: Wed Apr 16, 2025 8:53 am
by RC10th
This reminds me of when we found the magic tire that was untouchable we used to grind the names and markings off the sidewalls so nobody could figure out what they were.

Re: Losi Double XT CR Modern Racer

Posted: Wed Apr 16, 2025 12:33 pm
by Charlie don't surf
RC10th wrote: Wed Apr 16, 2025 8:53 am This reminds me of when we found the magic tire that was untouchable we used to grind the names and markings off the sidewalls so nobody could figure out what they were.
As an old dirt oval racer, we had tons of tricks...mostly gray area stuff too. I still find speed in things like this that others don't try. It's probably all the things I found to go fast back in the day that makes me want to explore ideas. I did always hide my stuff in plain site though. Different paint color on a tire (green dot on a gold) stuff like that, but I'm bad about telling guys the real info when they need it...so at least my work helps others lol

Re: Losi Double XT CR Modern Racer

Posted: Thu Apr 17, 2025 9:18 pm
by Charlie don't surf
As she sits on the CNS tires, 21mm F/20mm R ride height. Track time next week, I'll also be doing the same to some Rawspeed Gumball tires (they work very well at my home track) Also swapped the very clean Mk1 lightened motor plate for a new black one.

Re: Losi Double XT CR Modern Racer

Posted: Mon Apr 21, 2025 9:14 pm
by Charlie don't surf
Slight body rework, lots of old Novak stickers and sticker residue everywhere. Liquid wrench to the rescue for that. Purple splatter overspray all over the outside of the body, denatured alcohol for that. Added some white window outlines and a few stickers, a rear wing with an old Team Losi Performance sticker. Should be good for a month of shakedown runs. After that I'll paint one to match my buggy