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Old 07-28-2011, 05:00 PM   #1921
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Oops just remembered the red is slightly stiffer, been out of the game too long Well yeah if you try gold then hey would still like to hear back, First carpet race here is still about a month out. I need some BMI decals.
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Old 08-04-2011, 11:06 PM   #1922
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OK, last week one of our guys got an idea (always dangerous) and changed our track layout. Though I like the new layout, we are running on carpet with no line and it's extremely slippery. I tried a few things and got the car a bit better, but I'm in need of much much more rear grip. Current set up:

Copperhead 12 with 12R5 front.
Front track 170mm
springs AE ,020 .020 droop
Green Shurlube on kingpins
10' caster blocks with both shims back
42mm Jaco Lilac Jack about 1/4
0' toe in, 4.5mm clearance

Middle
50wt oil w/ gold spring
Blue Shurlube on tubes
4mm clearance
1.2 CF flex links set long

Back
Rear track 172mm
Clearance 4.5mm
44mm Jaco Orange full Paragon
1mm droop
Trinity Nemesis 13,5 boosted rollout 60.5mm.

Suggestions?
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Old 08-05-2011, 03:17 AM   #1923
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Quote:
Originally Posted by LonnyJ1950 View Post
OK, last week one of our guys got an idea (always dangerous) and changed our track layout. Though I like the new layout, we are running on carpet with no line and it's extremely slippery. I tried a few things and got the car a bit better, but I'm in need of much much more rear grip. Current set up:

Copperhead 12 with 12R5 front.
Front track 170mm
springs AE ,020 .020 droop
Green Shurlube on kingpins
10' caster blocks with both shims back
42mm Jaco Lilac Jack about 1/4
0' toe in, 4.5mm clearance

Middle
50wt oil w/ gold spring
Blue Shurlube on tubes
4mm clearance
1.2 CF flex links set long

Back
Rear track 172mm
Clearance 4.5mm
44mm Jaco Orange full Paragon
1mm droop
Trinity Nemesis 13,5 boosted rollout 60.5mm.

Suggestions?
Try running red shur lube in the tubes and go to Magenta front and pink rear tires. 13.5 boosted is too much motor for synthetic tires. They will fade. I also like to run the car level at 3.5mm ride height. I also would go to 5 degrees of reactive caster but keep it at maximum static caster. If you still have issues, run the pod .5mm higher at the front of the pod over the rear of the pod. I dont think you will need to go that far but use it as a last resort. Hope that helps buddy.
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Old 08-05-2011, 08:47 AM   #1924
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Hey Jason , called you this morning about adding that cooperhead 12 rear body mount cross brace to the web site . Still don't see it .

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Old 08-05-2011, 09:06 AM   #1925
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Try running red shur lube in the tubes and go to Magenta front and pink rear tires. 13.5 boosted is too much motor for synthetic tires. They will fade. I also like to run the car level at 3.5mm ride height. I also would go to 5 degrees of reactive caster but keep it at maximum static caster. If you still have issues, run the pod .5mm higher at the front of the pod over the rear of the pod. I dont think you will need to go that far but use it as a last resort. Hope that helps buddy.
One thing that Lonnie did'nt mention is that we have an indoor off-road track that is run dry five feet from the carpet. So traction is extremely low at all times. Also we have experimented with pink rears with no success on the previous layout, so with that in mind any other ideas?
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Old 08-05-2011, 09:14 AM   #1926
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With that kind of situation, has anyone tried grooving rear tires, like you would foams on dirt oval?
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Old 08-05-2011, 09:43 AM   #1927
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One thing that Lonnie did'nt mention is that we have an indoor off-road track that is run dry five feet from the carpet. So traction is extremely low at all times. Also we have experimented with pink rears with no success on the previous layout, so with that in mind any other ideas?
Hmm, that is tricky. I would try what we do on asphalt, suntan lotion over the traction compound. It keeps dirt from sticking to the tires. Less static caster then also. Try 4 degrees instead of 6.
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Old 08-05-2011, 04:43 PM   #1928
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Lonny,
I;ll have my whip (car) out this sunday. so we'll get something working worked out I'm going to run 17.5 boosted and see how that goes. Hopefully my tire order came in or I may not be able to get my car working with the tires that I currently have.

by the way I like to run my servo flat. I also have the 5 caster blocks.
E
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Old 08-05-2011, 07:20 PM   #1929
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Grooved tires have been run, though not by me. Weren't impressive. We will try as many of your suggestions as we have time to test. Thanks all.
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Old 08-05-2011, 07:31 PM   #1930
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You know I've never tried that suntan lotion thing so mabey I'll give it a go just for giggles, whats the procedure?
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Old 08-05-2011, 07:59 PM   #1931
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You know I've never tried that suntan lotion thing so mabey I'll give it a go just for giggles, whats the procedure?
Don't know I'd go that route for carpet....but here's how we use it for outdoors.

Normally apply paragon first, let soak for 10 mins, then apply Coppertone 30spf sunblock over that, massage it in, let sit for 5 -10 minutes, wipe off.

Or

Just use spf30 sunblock with no paragon.
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Old 08-06-2011, 06:17 AM   #1932
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Few ways to get more rear traction:
1. Use full size tires. 48mm rear and 46mm front.
2. Narrow down rear track, down to about 169mm
3. Use high down force body. ie. Parma speed8HD

Most likely you will need to stiffen up whole car to make it work with above changes.
Id go Red spring on center, .22 or .24 BMI linear springs for front. Maybe bit of toe out as well.
Pink rear will work on low traction track. Try using them with BSR Team purple front. With traction compound, I wont know what will work on your track as I never been there but something I would try is Trinity tire tweak 2000 soaked over 24hours in sealable plastic container, wipe well before use.
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Old 08-07-2011, 07:54 PM   #1933
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Ran the CH again today. And it was vastly improved. Final set up:

Front: Magenta @ 42.5mm 1/4 paragon
.020 AE springs
5' Blocks, Full caster (2 spacers back) 1.5' camber
0' toe in 5mm clearance

Center:50wt oil gold spring 1.2 CF flex plates soft #5 shurlube in tubes
5mm clearance

Rear: Yellow tires @ 45.5mm full Paragon light coat
58.3mm roll out
4.5mm clearance

TQ, 2ND in A main (lost by 9 seconds). Didn't try pinks, no one runs pinks, not enough grip. And since I was a bit short on time, I went with yellows which I knew would work if the rest of the car was right. Still have potential to tap, but generally very pleased. Thanks everyone.
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Old 08-10-2011, 09:03 AM   #1934
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Still new to 1/12 and got myself a copperhead after i was very frustrated with another cheap brand. @ Jason must compliment your car , just built it and very impressed with the quality. Wow its awesome.
Need some tyre info , some manufatures list the tyres in shores and CRC , Jaco and Parma in colors. Where can i get info on what shores the diff colors are?. Also why would some tyres be suited for carpet and others for asphalt.
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Old 08-10-2011, 09:45 AM   #1935
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On the BMI website Jason has a list of the colors and the shore rating that each color represents. The firmness; or shore number; and the type of foam determines what works best on each surface. Its not 100% complete as some new compounds have come out recently like orange that is not listed, but it will get you pointed in the right direction. But that can change from track to track as other varibles like how the track is preped and what tire additives are allowed also effect tire choice. If your still unsure post up your track type, type of prep used; like sugar water or soda on asphalt; and class your going to run and Jason will get you sorted out.
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