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Old 04-23-2011, 03:45 AM   #2311
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oops missed that on the notes, forward placement.
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Old 04-23-2011, 06:00 AM   #2312
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Jorge how did the car feel with quite a high roll centre?
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Old 04-23-2011, 08:17 AM   #2313
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actually they are very low, but i think it could be a specific thing to our tracks, that are huge and flowing tracks, with not that much grip. Although almost every cars on the market that i know have the same arm position or distance to the chassi that A3 gives on TC6. It's kind more of a feeling to you, for me and on that specific track and conditions it worked, so try it out.
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Old 04-23-2011, 11:22 AM   #2314
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Recommended drive ratio for 10.5? 5.2 - 6.4 is ok? don't really know what pinions to buy?
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Old 04-23-2011, 02:33 PM   #2315
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Old 04-23-2011, 02:55 PM   #2316
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Quote:
Originally Posted by jorgesimes View Post
actually they are very low, but i think it could be a specific thing to our tracks, that are huge and flowing tracks, with not that much grip. Although almost every cars on the market that i know have the same arm position or distance to the chassi that A3 gives on TC6. It's kind more of a feeling to you, for me and on that specific track and conditions it worked, so try it out.
Our track is high grip and technical asphalt. We all have gone to the A3 roll center. The biggest advantage of this roll center is that the arms do not get loose during a run, because these are the shortest blocks, so there is much less leverage on them. We have also used this roll center with a lot of success on high grip carpet and low grip asphalt.

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Recommended drive ratio for 10.5? 5.2 - 6.4 is ok? don't really know what pinions to buy?
Boost or no boost? This should be good for non-boosted settings. Depending on the length of your straightaway.
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Old 04-23-2011, 03:13 PM   #2317
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I'm running b0 as that's what's on all the setups I've seen. Is a3 very similar then?
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Old 04-23-2011, 03:18 PM   #2318
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I'm running b0 as that's what's on all the setups I've seen. Is a3 very similar then?
It should be about 1mm lower
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Old 04-23-2011, 03:32 PM   #2319
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Yes, it is actually closer to 1.5mm lower. Personally, we liked the A3 position more. Yes, many of the AE guys run the B0, but the car is not as consistent because the arms get the loosest with the 0 blocks. You can get very close to the B0 roll center by raising the outside camber link by 2 mm to a total of 4mm on the outside or you can start using shorter links to increase your roll stiffness to something similar. We are working on a solution for the blocks to not move over at Reflex. Maybe then, the B0 will be a good option, but as long as they get that loose, I would recommend to stay away from them. They will not hold up properly for a complete run.
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Last edited by CristianTabush; 04-24-2011 at 04:51 PM. Reason: typo
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Old 04-24-2011, 03:00 AM   #2320
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Quote:
Originally Posted by CristianTabush View Post
Boost or no boost? This should be good for non-boosted settings. Depending on the length of your straightaway.
Boost, dont know the length of straightway, that is in small hall so probably is not very long...
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Old 04-24-2011, 03:47 AM   #2321
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I think this chart is really nice, but it is not entirely accurate...I have been running 31/104 64p and according to this chart that wont fit.
Hm.

I must see it.

I don't have this 104/64p

I just calculate it from 48p and some tests for 64p I did,
it could works but you know

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Old 04-24-2011, 04:05 AM   #2322
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Boost, dont know the length of straightway, that is in small hall so probably is not very long...
If boosted you should start from a fdr of about 8.5 to 7.0, depending on track size and motor/esc brand
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Old 04-24-2011, 05:58 AM   #2323
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Cheers Jorge and Cristian, I'll give A3 a try at the track tomorrow and come back with some feedback.

I'll share a bit of know how now. I was advised by two Associated drivers to run Xray springs. I'm running 2.8 on the front and 2.6 on the rear. The car felt much freer without losing traction
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Old 04-24-2011, 09:54 AM   #2324
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Chris, have you seen my Thread? Our springs approximate the XRay springs very much, except they fit much better on the AE shock.

The Xray C2.8 springs are 16 lb springs and the C2.6 are 14.82 lb springs. With the long links it is just about perfect. With shorter links, like I run on our vertical-stud bulkheads, I went slightly softer to a 13.5lb rear and a 15.5lb front spring.

Give the A3 a shot, you'll find that you don't need to re-tighten the arms after every run anymore. Good place to start on the outside is with 4mm underneath the outside stud in the rear and 2mm in the front, with the extra long links (7 hole).
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Old 04-24-2011, 03:30 PM   #2325
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Quote:
Originally Posted by CristianTabush View Post
Yes, it is actually closer to 1.5mm lower. Personally, we liked the A3 position more. Yes, many of the AE guys run the B0, but the car is not as consistent because the arms get the loosest with the B blocks. You can get very close to the B0 roll center by raising the outside camber link by 2 mm to a total of 4mm on the outside or you can start using shorter links to increase your roll stiffness to something similar. We are working on a solution for the blocks to not move over at Reflex. Maybe then, the B0 will be a good option, but as long as they get that loose, I would recommend to stay away from them. They will not hold up properly for a complete run.
B0 blocks with alloy spacers definitely doesn't work, they just rotate.

I made up some carbon spacers and this fixes the problem; the spacers are the full size of the blocks and I roughened the surface with 60 grit sandpaper, so there's much more surface area and friction.

Maybe something you guys could produce? A few people have mentioned it but no one is doing it yet.
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