BMI's DB12R
02-04-2010, 01:07 PM
#8416
Yeah they are for the CRC front end as well unless you cut the bottom lip off of the arm. Then they work like a charm. Too bad you can't do something like that with the R5 adapters as well.
02-04-2010, 01:39 PM
#8417
i use 1mm carbon spacers to set my ride height at the front. i only have to unscrew the front end just a little and then i can put the shims underneath. something like the shims in the link underneath but the holes are open on one side so i can just shove it under the suspension block without unscrewing the whole front end. Works like a charm and is very easy and fast.
http://www.amainhobbies.com/product_...eight-Shim-Kit
http://www.amainhobbies.com/product_...eight-Shim-Kit
02-04-2010, 01:47 PM
#8418
Tech Adept
Hi all.... Major help needed... I have been running the DB12RR with 1C Lipo and cant make runtime??? I have geared up and down and still nothing. Does anyone know the right gearing for Mod?
My set-up is as follows:
4T Motor 0 timing , LRP SXX ESC on throttle profile 4, geared from 38.5 mm to 49 mm.
At high roll out I made about 4 minutes, and at the lower I ran about 6 minutes. Keeping in mind with the lower roll out the speed was slower. It seems as if it runs as fast as 4 cell for 1 or 2 minutes and then slows down until it is very slow???
Big National event this weekend, so any help would be great. Most people still running 4 cell here and I need to stay on par.
Thanks
My set-up is as follows:
4T Motor 0 timing , LRP SXX ESC on throttle profile 4, geared from 38.5 mm to 49 mm.
At high roll out I made about 4 minutes, and at the lower I ran about 6 minutes. Keeping in mind with the lower roll out the speed was slower. It seems as if it runs as fast as 4 cell for 1 or 2 minutes and then slows down until it is very slow???
Big National event this weekend, so any help would be great. Most people still running 4 cell here and I need to stay on par.
Thanks
02-04-2010, 01:56 PM
#8420
With mod you can not run all out all the time. You'll need to practice more throttle control then you are used to. Back when run time was an issue for stock even I used to drive only half to 3/4ths throttle even on the straights, holding back the rest for passing or maintaining my position. Also going to the least aggressive throttle profile should help some as well.
02-04-2010, 04:45 PM
#8421
02-04-2010, 04:59 PM
#8422
Tech Fanatic
iTrader: (23)
I used to have a spreadsheet with 2 simple equations in it, one for the front and one for the rear. All I had to do was input the current tire diameter and it would output the sized ride height adapter I needed. It worked pretty good and would usually get me to with in .5mm of what I needed so it really cut out a lot of the guess work. Problem was I usually didn't have my computer with me so I kept forgetting to use it. Now that I bring one with me most of the time for my RS and carry a smart phone which could probably handle it too it may be time to bring it back.
02-04-2010, 05:27 PM
#8423
It will be different for different front ends so I will share with you the method and formula I used.
First measure the distance from the bottom of the chassis to the center line of the front axle. We'll call this X.
Next measure the distance from the bottom of the chassis to the center line of the 0 ride height adapter. We'll call this Y.
Additional values:
Front ride Height = FH
Rear ride height = RH
Front ride height Adapter = FA
Rear ride height Adapter = RA
Front wheel Diameter = FD
Rear wheel Diameter = RD
So then front ride height is:
FH = FD/2-X-FA
And rear ride height is:
RH-RD/2-Y-RA
That's just off the top of my head while I'm still at work...it might need a little tweaking...it might be +RA at the rear since the adapter moves the axle down instead of up depending on the size of your rear tires.
First measure the distance from the bottom of the chassis to the center line of the front axle. We'll call this X.
Next measure the distance from the bottom of the chassis to the center line of the 0 ride height adapter. We'll call this Y.
Additional values:
Front ride Height = FH
Rear ride height = RH
Front ride height Adapter = FA
Rear ride height Adapter = RA
Front wheel Diameter = FD
Rear wheel Diameter = RD
So then front ride height is:
FH = FD/2-X-FA
And rear ride height is:
RH-RD/2-Y-RA
That's just off the top of my head while I'm still at work...it might need a little tweaking...it might be +RA at the rear since the adapter moves the axle down instead of up depending on the size of your rear tires.
02-04-2010, 09:17 PM
#8425
02-04-2010, 09:44 PM
#8426
I've seen more discussion about the R5 to imperial spacing front end on here than anywhere else so I suppose this is as good a place as any to ask this.
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
02-05-2010, 06:44 AM
#8427
Tech Adept
I've seen more discussion about the R5 to imperial spacing front end on here than anywhere else so I suppose this is as good a place as any to ask this.
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
Jason
02-05-2010, 06:56 AM
#8428
Moderator
iTrader: (9)
Join Date: Jan 2004
Location: Outside doing things in places... Denver, CO
Posts: 4,609
Trader Rating: 9 (100%+)
Yep I run the stock IRS alloy screws, just cut down to like 10mm or so. I do actually need two sets, one longer and one shorter so I can adjust ride height over the full range of a full front tire to a trued and run one.
02-05-2010, 07:34 AM
#8429
I've seen more discussion about the R5 to imperial spacing front end on here than anywhere else so I suppose this is as good a place as any to ask this.
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
high quality steel screws. i tried cutting down aluminum ones and just so of gave up trying to find one length that would work over a range of tire diameters. the hyperdrive adapters have a fastener interference challenge in the rear attachment.
02-05-2010, 08:31 AM
#8430
I think its usually the other way around
, but I'll let you know. 
Could be that the new front end Jason is working on will be as good or better and not require all the workarounds.
, but I'll let you know. I've seen more discussion about the R5 to imperial spacing front end on here than anywhere else so I suppose this is as good a place as any to ask this.
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?
I have all the parts to put an R5 front end on an old AE spaced chassis. The only thing I can't find are the 8-32 screws short enough to mount them to the chassis without bottoming out in the hyperdrive adapters. I found the Lunsfurd //Ti screws, but they're shortest length is 7/16ths. Short of ordering 50 through McMaster does anyone have a lead on 8-32 screws short enough to do the job? I refuse to use aluminum . . .Maybe I just need to dremel down a steel one?