248LikesXray XB4 thread
11-01-2018, 05:51 AM
Tech Regular
Have a used 2018 being shipped to me as we speak. I am going to go through the car and freshen it up. Any Suggestions on which wear parts to replace? I’m going to start with the shocks, diffs and slipper. Can anyone confirm if a associated spur/pads and associated xrings will fit? Has anyone ever tried yokomo yz4 sf spurs or xrings? I’d like to support my LHS if possible and they don’t stock X-ray sadly
11-01-2018, 12:52 PM
Tech Master
iTrader: (17)
Any particular reason that most of the teams drivers setups use oil weights much much higher than other teams like AE, TLR, Yokomo? Is that a car dependent thing, or a driving style/philosophy thing?
11-01-2018, 01:49 PM
11-02-2018, 02:20 PM
Tech Master
iTrader: (17)
Most AE team drivers use around 37.5-40wt, which is 450-500cst.
And 99% of setups for both cars use 2x1.6mm pistons, 12mm shocks etc. So I’m just curious as to why there is such a big discrepancy. Driving style or something else engineering-wise?
11-05-2018, 09:18 AM
First why are you looking at AE team driver setups for the Xray XB4... lol
If you look on Petit RC database and look at some of the Xray Team driver sheets,
you'll see most are running something 500 F / 450 R or 450 F / 400 R
Higher rates like 600 to 700 are usually for carpet set-ups
If you look on Petit RC database and look at some of the Xray Team driver sheets,
you'll see most are running something 500 F / 450 R or 450 F / 400 R
Higher rates like 600 to 700 are usually for carpet set-ups
11-05-2018, 03:01 PM
I have a 2018 XB4 and wanted to get some opinions on if it is worth upgrading to the 2019?
11-05-2018, 03:42 PM
My 2017 is a great car, but you would think at twice the price for the outdrives they would last twice as long as everybody else, but they seem to ware faster. To replace front rear and clutch outdrives...$125.00!...insane. I know its Xray and everything is more but the outdrives ware to quickly for the price. No I do not drive on a dusty outdoor track, yes I maintain my cars very well yes I replace pins with Hudy pin remover tool.
11-05-2018, 09:07 PM
Tech Master
iTrader: (17)
First why are you looking at AE team driver setups for the Xray XB4... lol
If you look on Petit RC database and look at some of the Xray Team driver sheets,
you'll see most are running something 500 F / 450 R or 450 F / 400 R
Higher rates like 600 to 700 are usually for carpet set-ups
If you look on Petit RC database and look at some of the Xray Team driver sheets,
you'll see most are running something 500 F / 450 R or 450 F / 400 R
Higher rates like 600 to 700 are usually for carpet set-ups
Yes, I am looking at petit rc setups. Apple to apples, carpet/Astro, indoors, same pistons, similar shock bodies. Vastly different oil weights. My question is WHY?....
(note I’m not questioning the ability of the top X-ray drivers to set up a car. Clearly they are awesome. The nerd in me just needs to know WHY things are the way they are)
11-06-2018, 04:42 AM
I have both cars, that’s why. In addition to the 22-4 2.0 and yz4 sf.
Yes, I am looking at petit rc setups. Apple to apples, carpet/Astro, indoors, same pistons, similar shock bodies. Vastly different oil weights. My question is WHY?....
(note I’m not questioning the ability of the top X-ray drivers to set up a car. Clearly they are awesome. The nerd in me just needs to know WHY things are the way they are)
Euro tracks are mostly the black carpet which is very high bite from the start so a car doesnt need as soft of a suspension to generate traction.
American tracks range from the old Ozite that takes a bit to build a groove and (imo) likes a softer supsension to let the car roll and gain traction.
Other carpets with deeper weeves like the deeper pins to dig in for forward bite but still lean towards a soft suspension for lateral traction.
Then the car geometry plays into effect. AE chassis I know are thicker then the XB so there comes the play of torsional twist.
I see the XB as generating more traction with a thinner softer reacting chassis.
The AE chassis is thicker so the setup window closes a bit and likes a softer suspension to make up for the chassis.
Downside is thicker ca also make the car feel edgy where as a little softer can numb the car up a bit and make it feel more forgiving to the little clips.
Ive looked at a lot of setups trying to crossbreed some and I tend to try and match carpet to carpet.
Ive tried EOS setups and it just feels like I cant find one that works well enough on American carpets.
And then ya - driver discipline lol.
11-06-2018, 09:37 AM
As for why they are different, cause each car can offer something different to drivers and their driving style.
So I would say most are based on preference and what they are trying to get the car to do for them and their style
So I would say most are based on preference and what they are trying to get the car to do for them and their style
11-06-2018, 09:41 AM
My center diff outdrive is just now showing signs of needing replaced and yes its been in the car since Sept of 2016 when I bought car new.
The dog bones and pins still look great and the ring/pinion gears and the internal plastic gears in diff have been fine running both carpet and dirt.
11-06-2018, 09:43 AM
My best guess/opinion would be car geometry and carpet types.
Euro tracks are mostly the black carpet which is very high bite from the start so a car doesnt need as soft of a suspension to generate traction.
American tracks range from the old Ozite that takes a bit to build a groove and (imo) likes a softer supsension to let the car roll and gain traction.
Other carpets with deeper weeves like the deeper pins to dig in for forward bite but still lean towards a soft suspension for lateral traction.
Then the car geometry plays into effect. AE chassis I know are thicker then the XB so there comes the play of torsional twist.
I see the XB as generating more traction with a thinner softer reacting chassis.
The AE chassis is thicker so the setup window closes a bit and likes a softer suspension to make up for the chassis.
Downside is thicker ca also make the car feel edgy where as a little softer can numb the car up a bit and make it feel more forgiving to the little clips.
Ive looked at a lot of setups trying to crossbreed some and I tend to try and match carpet to carpet.
Ive tried EOS setups and it just feels like I cant find one that works well enough on American carpets.
And then ya - driver discipline lol.
Euro tracks are mostly the black carpet which is very high bite from the start so a car doesnt need as soft of a suspension to generate traction.
American tracks range from the old Ozite that takes a bit to build a groove and (imo) likes a softer supsension to let the car roll and gain traction.
Other carpets with deeper weeves like the deeper pins to dig in for forward bite but still lean towards a soft suspension for lateral traction.
Then the car geometry plays into effect. AE chassis I know are thicker then the XB so there comes the play of torsional twist.
I see the XB as generating more traction with a thinner softer reacting chassis.
The AE chassis is thicker so the setup window closes a bit and likes a softer suspension to make up for the chassis.
Downside is thicker ca also make the car feel edgy where as a little softer can numb the car up a bit and make it feel more forgiving to the little clips.
Ive looked at a lot of setups trying to crossbreed some and I tend to try and match carpet to carpet.
Ive tried EOS setups and it just feels like I cant find one that works well enough on American carpets.
And then ya - driver discipline lol.
11-06-2018, 03:49 PM
Yes, the 19 car is easier to drive than the 18 car. Its not worth trying to update the 18 car to the 19 in my opinion. The rear of the 19 car is so locked in, the it takes away a lot of the twitchyness of the past cars and gives the car of feeling that you can push the car hard or not at all and its still fast. The new car is very hard to get it to traction roll compared to prior years with the same set ups and tires. Overall the few things that were changed have made a huge difference in the car.
11-07-2018, 09:34 AM
Ahhh nice to hear about the 19 car Stig, haven't seen too many people chatting about it.
11-07-2018, 05:47 PM
Tech Master
iTrader: (17)
Ran the car for the first time and qualified 2nd (behind a much better driver). Car is soooooo easy to drive. In the main I had some terrible luck together with some stupid mistakes and fell all the way back to 8th with less than half the race left, but I was able to push the car hard and still work back up to 3rd. Can’t wait to drive it again.