Xray T4 18
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#871
Setup station, what does Hudy give you that Gforce doesn’t or other brands. I like buying quality but I don’t want to pay more because of just the name.
Thanks
Thanks
#872
My experience with both have been very positive.
I have the Hudy kit because I found it for $75. Otherwise, I’d have the gforce kit.
I have the Hudy kit because I found it for $75. Otherwise, I’d have the gforce kit.
#873
#874
Tech Regular
#875
Could not buy a 1.3 front bar, so I dremelled the kit 1.4 bar with a stone bit to around 1.32 then sandpaper to 1.30. Took about 5 minutes, not as hard as I thought.
#876
Where’s everyone mounting their transponder, pics please. Not much room, I’ve seen some on top of the servo mount bracket
#879
Thats what I was thinking, as far forward as possible and low. Putting it in the middle that could cost you a position at the line if your side by side.
Thanks
Thanks
#881
Tech Master
The link didn't work.
This is one of the pages I read that summarised roll centre well:
Understanding and Tuning Roll Centre
Especially usefull was this part:
Rear Roll Center
The lower the rear roll center is, the more off power and low speed corner grip the rear end will have, but the less on power corner exit the car will have (and it will get worse the harder the car is pushed out of the corner). The higher the rear roll center is, the more it will be able to be pushed on corner exit and maintain grip, and the more willing it will be to rotate in low speed corners or any time the rear is unloaded under corner entry or mid corner transition. An extremely high roll center will make for a car that can punch out of any corner extremely hard but will slide around willingly in low speed corners. An extremely low roll center will make for a car that is too hooked up and unwilling to rotate in the infield and very difficult to exit corners with any speed, causing you to wait on the car to get moving or else it will come around on you.
If you are unsure as to which direction you need to go on rear roll center tuning to address an issue, ask yourself this: When I apply throttle, does it get better or worse? Applying throttle will cause more weight to transfer to the back and more chassis roll. If the throttle improved the situation, and more grip was had, you likely needed to lower the roll center to get more roll. If it made it worse, and the additional roll from throttle application broke the car free, it was probably rolled to far to begin with, dictating a higher roll center to prevent the excess roll.
If you have trouble finding a balance on rear roll center, another setting is likely to blame. On a recent track change, I found that I needed to lower my rear roll center for better traction in the infield technical sections, but it hurt my ability to maintain grip at the end of a sweeper's on power exit to a straight away. My rear spring choice was as stiff as I felt I could run, so my solution was to add another limiter to my front shocks to reduce total weight transfer to the rear on acceleration.
In my opinion, if you have to err on the side of high/low in the rear, pick high. This will leave you with a car that doesn't punish you if you drive it too hard out of corners and at worst has a little more rotation at low speed, which can be fast in and of itself. There is nothing I hate more than a car that breaks free in the rear once it feels hooked up and you get on the throttle."
Understanding and Tuning Roll Centre
Especially usefull was this part:
Rear Roll Center
The lower the rear roll center is, the more off power and low speed corner grip the rear end will have, but the less on power corner exit the car will have (and it will get worse the harder the car is pushed out of the corner). The higher the rear roll center is, the more it will be able to be pushed on corner exit and maintain grip, and the more willing it will be to rotate in low speed corners or any time the rear is unloaded under corner entry or mid corner transition. An extremely high roll center will make for a car that can punch out of any corner extremely hard but will slide around willingly in low speed corners. An extremely low roll center will make for a car that is too hooked up and unwilling to rotate in the infield and very difficult to exit corners with any speed, causing you to wait on the car to get moving or else it will come around on you.
If you are unsure as to which direction you need to go on rear roll center tuning to address an issue, ask yourself this: When I apply throttle, does it get better or worse? Applying throttle will cause more weight to transfer to the back and more chassis roll. If the throttle improved the situation, and more grip was had, you likely needed to lower the roll center to get more roll. If it made it worse, and the additional roll from throttle application broke the car free, it was probably rolled to far to begin with, dictating a higher roll center to prevent the excess roll.
If you have trouble finding a balance on rear roll center, another setting is likely to blame. On a recent track change, I found that I needed to lower my rear roll center for better traction in the infield technical sections, but it hurt my ability to maintain grip at the end of a sweeper's on power exit to a straight away. My rear spring choice was as stiff as I felt I could run, so my solution was to add another limiter to my front shocks to reduce total weight transfer to the rear on acceleration.
In my opinion, if you have to err on the side of high/low in the rear, pick high. This will leave you with a car that doesn't punish you if you drive it too hard out of corners and at worst has a little more rotation at low speed, which can be fast in and of itself. There is nothing I hate more than a car that breaks free in the rear once it feels hooked up and you get on the throttle."
#882
#883
Tech Initiate
I’ve seen a couple of set up sheets with only 1 screw in the motor mount, is this correct? Just the nut + 1 other screw?
Also diff position ‘Up’ - does this refer to the tab on the eccentric bearing carrier being in the ‘up’ position and therefore the diff being low, or the other way around?
Cheers!
Also diff position ‘Up’ - does this refer to the tab on the eccentric bearing carrier being in the ‘up’ position and therefore the diff being low, or the other way around?
Cheers!
#884
T4 spur gear options
I am looking for a 102 tooth 64p spur. Any other brands work with xrays?