BMI Racing "Copperhead 12" discussion and support
#902
Hey Guys,
I will have slightly longer screws available shortly on the website that will allow you to shim the hinge pin blocks on the new front end up. With the stock 1/2 inch flat head screws you can run up to 1mm of shims. I will have 4-40 x 9/16 that will allow you to go from 1mm to 2mm of shims and then 4-40x 5/8 for shimming 2-3mm.
I will have slightly longer screws available shortly on the website that will allow you to shim the hinge pin blocks on the new front end up. With the stock 1/2 inch flat head screws you can run up to 1mm of shims. I will have 4-40 x 9/16 that will allow you to go from 1mm to 2mm of shims and then 4-40x 5/8 for shimming 2-3mm.
#903
Tech Elite
iTrader: (51)
Join Date: Feb 2002
Location: Comin at ya from a distant galaxy
Posts: 2,920
Trader Rating: 51 (100%+)
Yo Jason,
Nice!!! I see a Future 1/12th World Champion in the Work's Hey, With Horsham opening up You gotta come down here and race with us sometime.
Nice!!! I see a Future 1/12th World Champion in the Work's Hey, With Horsham opening up You gotta come down here and race with us sometime.
I didnt get to run the main. I had to leave. We ran 5 quals though. We had extremely stiff comp as Mike Bruce, Jeff Brown, TJ Bradley, Steve Mcnichols(just won the snowbirds) and more. There were 2 full heats of 1/12th and i qualified 5th or 4th in the A.(i forgot) I was only about .2-.3 off of the really fast guys for fast lap and averaged very close to the same lap times throughout the race. My nerves get to me but the car was great. ANY of those guys would have made the car look even better I was surprised to be hanging with them.
#908
Tech Fanatic
iTrader: (8)
I think I may have found it!
Hey guys,
I think I may have found the source of my issues from the other night.
Jason, is it possible for the setscrews that control front ride height to back out and thus cause unwanted changes in the front ride height?
I just checked the car (haven't touched it since Saturday night) and my front ride height is down to 2mm and there is evidence of the front of the chassis physically touching the track (chassis butter on the front edge and on the alloy screws). I know I started the night @ 4mm ride height and I'm only measuring about 0.5mm of wear from the front wheels so somewhere I have lost about 1.5 or 2mm of ride height!
The chassis touching down onto the track as the car leans into the corner would cause the back end to come around uncontrollably...wouldn't it?
I'm still going to try some of the suggestions made earlier but I'm kinda hoping that this is/was the issue.
Cheers,
Mike
I think I may have found the source of my issues from the other night.
Jason, is it possible for the setscrews that control front ride height to back out and thus cause unwanted changes in the front ride height?
I just checked the car (haven't touched it since Saturday night) and my front ride height is down to 2mm and there is evidence of the front of the chassis physically touching the track (chassis butter on the front edge and on the alloy screws). I know I started the night @ 4mm ride height and I'm only measuring about 0.5mm of wear from the front wheels so somewhere I have lost about 1.5 or 2mm of ride height!
The chassis touching down onto the track as the car leans into the corner would cause the back end to come around uncontrollably...wouldn't it?
I'm still going to try some of the suggestions made earlier but I'm kinda hoping that this is/was the issue.
Cheers,
Mike
#909
That is a possibility. What you can do is put a touch of CA on the screw threads or locktight. I personally put locktight on the setscrews before installing them as it makes the threads tight and makes adjustments hold very well. It also almost acts as a lubricant when you install them. HTH
#910
Tech Champion
I was thinking on looking for some Bullet lock tight...I used to use that awhile back and like it for screws that still need to be adjusted. It dries sticky but not hard like other lock tight brands.
#911
You know what was really cool, I watched everyone going through tires like crazy. Tire wear is so minimal with this front end. It is so efficient. I was really blown away by that. When i showed people there eyes blew up. They thought i was messing with them. Front and rear wore evenly. The sweeper didnt even beat the tires down
#912
The other thread lock I really like is Tamiya, it is very rubbery, holds right away after putting it on, and is easy to break loose when you need to. It is also compatible with plastics, some threadlocks are not... JEFF
#913
Tech Master
iTrader: (8)
I ran my DB12RR with the New Front on Saturday, with no other changes from the previous week. Unfortunately it was one of those nights when almost everything seems to go wrong, but unrelated to the NF. (Except that I had to clip the corners off the servo saver for clearance. Is this normal with the NF?)
I only finished one of four quallies, and only 3 laps of the main. So why am I happy? In my first qually of 12(!) laps I equalled my best lap of the previous week. And in the main my third lap (which was also my last lap) was 3/10s better than ANY prevous lap I'd done.
I think Jason said he favours the front flex plates in the outer position towards the wheels. I can't do this with the RR due to the chassis cutouts.
What difference does this positioning make?
Would there be any problems if I made a thin brace to support the set screw? It looks like there would be sufficient room.
Thanks.
I only finished one of four quallies, and only 3 laps of the main. So why am I happy? In my first qually of 12(!) laps I equalled my best lap of the previous week. And in the main my third lap (which was also my last lap) was 3/10s better than ANY prevous lap I'd done.
I think Jason said he favours the front flex plates in the outer position towards the wheels. I can't do this with the RR due to the chassis cutouts.
What difference does this positioning make?
Would there be any problems if I made a thin brace to support the set screw? It looks like there would be sufficient room.
Thanks.
#914
You can CA a thin piece of fiberglass across that area to support the flex plates. I actually ran the 1.8mm ones in the soft postion this weekend and really liked them. Both the stock and the 1.8mm worked very well. I liked the feel of the 1.8mm with the high traction. You can run the 1.8mm if you dont want to have a support plate for the set screws on the chassis.
Take a pic of the car and post it here so i can see what you have for the servo mounting. I didnt clip my servo saver. I am trying to picture what is happening.
Take a pic of the car and post it here so i can see what you have for the servo mounting. I didnt clip my servo saver. I am trying to picture what is happening.
#915
Tech Champion
The medium and larger servo savers may not clear...the small Kimbro ones should no problem.