Xray XB4 thread
#2386
Tech Master
iTrader: (15)
I think this is why you have the option to use the -.75 and +.75 wheel hexes if you need 10 degrees of toe in total on the rear. I can't imagine a time when you would but yes your calculations are correct.
You can have anti squat and track width options as a combo but you can only change the roll centre by .5 if you were changing the anti squat by .5. Just look at the 9 dot blocks on the setup sheet and it all makes sense. It's still got more adjustments than most cars so I think this is not really a down side to the car.
You can have anti squat and track width options as a combo but you can only change the roll centre by .5 if you were changing the anti squat by .5. Just look at the 9 dot blocks on the setup sheet and it all makes sense. It's still got more adjustments than most cars so I think this is not really a down side to the car.
Looking for some clarification regarding the eccentric bushings....
From looking at the charts am i correct in my thinking that not all combinations are possible.. Could you folks confirm my thinking with some of my observations below?
For instance:
1) Only 2 degrees of anti squat will allow you to be able to change to all 3 different roll center positions. (You cannot have 1,3 or 4 degrees of anti squat and have roll center options its fixed)
2) Similarly only 3 degrees of rear toe will allow u to be able to change to all 3 track width options. (you cannot have 1,2,4 or 5 degrees of rear toe and have track width changes)
3)A rear toe setting of 5 degrees has a fixed track width of 0mm
4)A rear toe setting of 4 degrees has 2 track width options of +.75mm or -.75mm
In other words outside of 2 degree anti squat and 3 degrees of rear toe, you can not get all tuning options for roll center and track width.
I think i have it down but after trying to explain it at the track the other night lol i had started to question if i was right. The table is a bit of a mind F%@# when you pull it out fast and try to explain it between a qualifier
I think i have clarified this for my self after typing this all out but ill post anyway incase anyone else is overwhelmed at looking at the chart
From looking at the charts am i correct in my thinking that not all combinations are possible.. Could you folks confirm my thinking with some of my observations below?
For instance:
1) Only 2 degrees of anti squat will allow you to be able to change to all 3 different roll center positions. (You cannot have 1,3 or 4 degrees of anti squat and have roll center options its fixed)
2) Similarly only 3 degrees of rear toe will allow u to be able to change to all 3 track width options. (you cannot have 1,2,4 or 5 degrees of rear toe and have track width changes)
3)A rear toe setting of 5 degrees has a fixed track width of 0mm
4)A rear toe setting of 4 degrees has 2 track width options of +.75mm or -.75mm
In other words outside of 2 degree anti squat and 3 degrees of rear toe, you can not get all tuning options for roll center and track width.
I think i have it down but after trying to explain it at the track the other night lol i had started to question if i was right. The table is a bit of a mind F%@# when you pull it out fast and try to explain it between a qualifier
I think i have clarified this for my self after typing this all out but ill post anyway incase anyone else is overwhelmed at looking at the chart
#2387
Tech Master
iTrader: (29)
Boz. Kimbrough 69T b4 spur, ae pads. get a reamer and do it slowly so you dont lopside it. You need to take off about 1mm.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
#2389
Boz. Kimbrough 69T b4 spur, ae pads. get a reamer and do it slowly so you dont lopside it. You need to take off about 1mm.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
Curious whether it's better to leave the timing alone for max torque and lower the FDR than vice versa.
#2390
Tech Fanatic
iTrader: (23)
Boz. Kimbrough 69T b4 spur, ae pads. get a reamer and do it slowly so you dont lopside it. You need to take off about 1mm.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
(or centre on a drill press and do it the easy way)
I geared at 69/30 with a reedy mk2 17.5. won qld stock titles with this and a modified version of your setup
I'll take a photo later tonight.
Thanks for the spur info.
Clad that you liked the setup. Z00M and I worked on that one for a few weeks. We have a new one now for low traction track. A little fine tuning to do still. Gee its easy to drive if you don't mind a little understeer. Here are my lap times from Friday Night, temp was about 10deg (bloody cold).
http://www.wcmrc.asn.au/Offroad/inde...in_Race_5.html
#2391
Tech Master
iTrader: (29)
35-38 deg on these reedys give me 60-70deg. 40 gives me 80 deg for some reason.
The main thing to remember in 17.5 is that you want your corner speed as high as possible and you want to slow down as little as possible. If your track doesn't have many (or any) tight 180s, having a higher timing can pay off, if you can keep a tight line while holding corner speed.
Thanks for the spur info.
Clad that you liked the setup. Z00M and I worked on that one for a few weeks. We have a new one now for low traction track. A little fine tuning to do still. Gee its easy to drive if you don't mind a little understeer. Here are my lap times from Friday Night, temp was about 10deg (bloody cold).
http://www.wcmrc.asn.au/Offroad/inde...in_Race_5.html
Clad that you liked the setup. Z00M and I worked on that one for a few weeks. We have a new one now for low traction track. A little fine tuning to do still. Gee its easy to drive if you don't mind a little understeer. Here are my lap times from Friday Night, temp was about 10deg (bloody cold).
http://www.wcmrc.asn.au/Offroad/inde...in_Race_5.html
Still using the swaybars? I found the buggy to handle a lot better on low traction with the swaybars removed.
#2393
Tech Master
iTrader: (1)
Thanks for the spur info.
Clad that you liked the setup. Z00M and I worked on that one for a few weeks. We have a new one now for low traction track. A little fine tuning to do still. Gee its easy to drive if you don't mind a little understeer. Here are my lap times from Friday Night, temp was about 10deg (bloody cold).
http://www.wcmrc.asn.au/Offroad/inde...in_Race_5.html
Clad that you liked the setup. Z00M and I worked on that one for a few weeks. We have a new one now for low traction track. A little fine tuning to do still. Gee its easy to drive if you don't mind a little understeer. Here are my lap times from Friday Night, temp was about 10deg (bloody cold).
http://www.wcmrc.asn.au/Offroad/inde...in_Race_5.html
I thought you should of put this one up ...http://www.wcmrc.asn.au/Offroad/inde..._2_Race_5.html
#2395
Tech Elite
iTrader: (43)
@silvalis
I tried your shock and diff setups on a 6.5 boosted slightly. It was the fastest and most consistent I have been with my car thus! Only difference was the front and rear roll centers, I had different blocks on and 0.75 hubs on rear and stock on front. And avid pistons.
Going to stick with your spring combo and 7 7 FR on diffs for now . I also put less rear droop and more on the front than that sheet. Its so much easier for me to land front wheel first on my track now and the added front droop adds a bit of understeer feels almost like a 1/8 nitro buggy .
I tried your shock and diff setups on a 6.5 boosted slightly. It was the fastest and most consistent I have been with my car thus! Only difference was the front and rear roll centers, I had different blocks on and 0.75 hubs on rear and stock on front. And avid pistons.
Going to stick with your spring combo and 7 7 FR on diffs for now . I also put less rear droop and more on the front than that sheet. Its so much easier for me to land front wheel first on my track now and the added front droop adds a bit of understeer feels almost like a 1/8 nitro buggy .
#2397
R/C Tech Elite Member
iTrader: (315)
Boz has your set up from Jan that you have posted changed much to now? Moving from a DEX410 to an XB4 in the next week or so for buggy stock and am wondering where to start setup wise. Best lap I have had in the Durango was a 31.1 I think, so it's not working for me! (Even worse when wheels fall off!)
#2398
Tech Fanatic
iTrader: (23)
Boz has your set up from Jan that you have posted changed much to now? Moving from a DEX410 to an XB4 in the next week or so for buggy stock and am wondering where to start setup wise. Best lap I have had in the Durango was a 31.1 I think, so it's not working for me! (Even worse when wheels fall off!)
Build your kit as per instructions and I would change the following things.
7,000 diff oil front and rear
3mm spacer in front shock will equal about +4mm of droop when using the inner arm hole and ballend is screwed all the way up. Unscrew for more droop if required.
2mm spacer in rear shock will equal about +4mm of droop when using the inner arm hole and ballend is screwed all the way up. Unscrew for more droop if required.
Use inner holes on arms for mounting the shocks.
Ride height should be 20mm front and rear.
Glue on some Proline Suburbs. (That's the icing on the cake for our track)
#2399
Tech Elite
iTrader: (43)
Yeah I got them aluminums and never looked back. I used some simichrome polish on the shock shafts and they are butter now. For droop I ran 1 mm downstop front and 4 mm downstop in rear. It has enough on power steer for a super fast sweeper and can still break it loose on tight hairpins with a dab of brakes . Also removed the metal diff gears and used v2 upgrades did not notice much of a difference though.