Xray T4 '13
#4186
Tech Master
iTrader: (22)
Join Date: Aug 2003
Location: Where there's smoke there's a tyre
Posts: 1,784
Trader Rating: 22 (100%+)
Xray touring car designer Martin Hudy is having a really good showing here in Austria, leading his team in an improved performance over Rd4 which saw the Slovakian company fail to get any cars into the modified A-main. Since then they have done a lot of testing and found that running harder springs and harder oil helped find the steering they were lacking, while retaining a responsive car. A change to anti-dive front and rear, harder oil in the rear diff as well as progressive springs all around and they now have a car that is competitive again.
#4187
Tech Elite
iTrader: (8)
I just started my build on my first xray. Lightly sanded the chassis edges with 400. Debated gluing because I thought it could be messy, but decided to go for it. I used my tire glue with glue hose, and just as people described, I put on a small bead, and it ran down smoothly, then I wiped excess with a towel. No mess. I hit it lightly with 1500 afterwards. It's not art, but hopefully it does the job.
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
#4188
TTVert and JoeSi - Many thanks, it gives me something to use as a rough understanding
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
Last edited by tc3team; 06-19-2013 at 03:36 AM. Reason: shoot me im a n00b! xD
#4189
I just started my build on my first xray. Lightly sanded the chassis edges with 400. Debated gluing because I thought it could be messy, but decided to go for it. I used my tire glue with glue hose, and just as people described, I put on a small bead, and it ran down smoothly, then I wiped excess with a towel. No mess. I hit it lightly with 1500 afterwards. It's not art, but hopefully it does the job.
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
#4190
Tech Master
iTrader: (74)
I just started my build on my first xray. Lightly sanded the chassis edges with 400. Debated gluing because I thought it could be messy, but decided to go for it. I used my tire glue with glue hose, and just as people described, I put on a small bead, and it ran down smoothly, then I wiped excess with a towel. No mess. I hit it lightly with 1500 afterwards. It's not art, but hopefully it does the job.
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
The real reason I'm posting is the gear diff. Holy... Frigging... Crap. I've only built spec-r, and with absolutely no work, this thing is 10x better than my best spec-r ever was. I don't think I can go back.
-Mike
#4191
Tech Master
iTrader: (49)
TTVert and JoeSi - Many thanks, it gives me something to use as a rough understanding
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
#4192
Much appreciated.
I wanted to know what kind of difference front and rear diff I should expect to use on a technical high grip track to get the car handling good and not "diff out"
I see the guide mentions to use a certain amount of grammes of oil in the diff on a set of scales.... Do I need Hudy scales for this?
#4193
Tech Master
iTrader: (3)
Join Date: Nov 2001
Location: Land of high taxes and bad football
Posts: 1,807
Trader Rating: 3 (100%+)
very useful!
Much appreciated.
I wanted to know what kind of difference front and rear diff I should expect to use on a technical high grip track to get the car handling good and not "diff out"
I see the guide mentions to use a certain amount of grammes of oil in the diff on a set of scales.... Do I need Hudy scales for this?
Much appreciated.
I wanted to know what kind of difference front and rear diff I should expect to use on a technical high grip track to get the car handling good and not "diff out"
I see the guide mentions to use a certain amount of grammes of oil in the diff on a set of scales.... Do I need Hudy scales for this?
#4194
Tech Elite
iTrader: (72)
I run on a very similar track to you except I run on a rubber VTA tire. I've been using 2k rear diff oil and a spool up front. I'm also running a heavier shock oil w/ a softer spring.
Dave
Dave
TTVert and JoeSi - Many thanks, it gives me something to use as a rough understanding
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
However, since studying the charts, all of the values suggested are all for very light cts.
I would use the kit supplied xray oil to assemble one of the differentials and use higher or lower for the other end - depending on what you guys would think is the preferred choice for the other differential. (because im a total newbie with understanding gear diffs lol )
I am looking for a lot of forward bite, as the front diff will be working rather hard on a small 10x15m technical track. (foams, high bite carpet).
So, kit oil in the front or rear? And ___ cst for the other please?
I know I will never want to go back to a ball diff when the gear diff's are built but damn.... they are easier to understand
Sorry for the newbie stuff, once i'm racing things will be easier for me... I hope lol!
Maybe I should simply build up with kit oil for both differentials....
But no doubt I will only get enough oil to fill one, even if I buy a second diff with the car, right?
#4196
Tech Master
iTrader: (49)
very useful!
Much appreciated.
I wanted to know what kind of difference front and rear diff I should expect to use on a technical high grip track to get the car handling good and not "diff out"
I see the guide mentions to use a certain amount of grammes of oil in the diff on a set of scales.... Do I need Hudy scales for this?
Much appreciated.
I wanted to know what kind of difference front and rear diff I should expect to use on a technical high grip track to get the car handling good and not "diff out"
I see the guide mentions to use a certain amount of grammes of oil in the diff on a set of scales.... Do I need Hudy scales for this?
As far as I'm told. Using lighter oil in the rear diff will allow less rotation and thicker oil allows more rotation.
You don't need the Hudy scales. I just use a digital scale to fill mine.
#4197
Sorry for the xray newbie question, but I have heard of some people using shock oil in the gear differentials?
Would a typical 75wt shock oil be similar to the kit 750 supplied item?
I only ask as gear diff oil does not appear to be so easy to get (I could get it from Demon Power, but if I can use shock oil then it's much easier to source! ).
Many thanks
Would a typical 75wt shock oil be similar to the kit 750 supplied item?
I only ask as gear diff oil does not appear to be so easy to get (I could get it from Demon Power, but if I can use shock oil then it's much easier to source! ).
Many thanks
#4198
is a new xray coming? most places seem to be backordered
#4199
#4200
thats the brand i use core rc,which id love to have a comparison chart against the xray oils
Last edited by chasingthepack; 06-23-2013 at 01:09 PM.