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Old 05-15-2014, 03:48 PM   #1081
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With the use of the 22mm bell cranks, there is limited space between the rack and suspension block. Zero shims will fit. I run 20mm bell cranks and 1.5mm so just a bit more flexibility with adjustments with Ackerman. The 8.5 mm aids with smoother steering.
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Old 05-15-2014, 05:25 PM   #1082
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With the use of the 22mm bell cranks, there is limited space between the rack and suspension block. Zero shims will fit. I run 20mm bell cranks and 1.5mm so just a bit more flexibility with adjustments with Ackerman. The 8.5 mm aids with smoother steering.
trigger
i agree, i run the same as you 20mm but with 1 mm shim & love the way the steering responds & smoothness, i thought the std set up was good untill a friend told me to try this way

marc
when you do get around to trying it i think you will be pleasantly supprised at how good it is, but when you get there
great feedback also, just a shame we dont have carpet tracks here in aus to run on
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Old 05-15-2014, 06:57 PM   #1083
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The 8.5mm Steering plate is on Back-Order at the moment.

In the meantime: I'm going to try using 3.5mm shims on the Ackerman while still running the Standard 18mm Bell Crank, (never ran more than 2mm) so it will be interesting. This should give somewhat of the same feel as using the 20mm Bell Crank option bits and 1.5mm on the Ackerman shim. I know it won't be the same but will get me in the ballpark for a general feel.

I'll let you guys know what I think in a couple days. I'll have another 2 day weekend at the track (Sat. & Sun.)
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Old 05-15-2014, 11:28 PM   #1084
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It won't give you the same feel, because it's the length of the bell crank that determines the arc that the rack travels through.
That said, I borrowed some 20mm cranks last weekend, and didn't feel a great difference tbh. The steering maybe felt a bit more linear around centre if anything.
The kit ones are the same length as what Yok us on the BD7, which should maybe be a clue.
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Old 05-16-2014, 07:01 AM   #1085
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It won't give you the same feel, because it's the length of the bell crank that determines the arc that the rack travels through.
That said, I borrowed some 20mm cranks last weekend, and didn't feel a great difference tbh. The steering maybe felt a bit more linear around centre if anything.
The kit ones are the same length as what Yok us on the BD7, which should maybe be a clue.
I figured that would be the case as the 20mm bell crank will give more leverage on the rack over the 18mm. My steering with the standard kit (18mm bell crank) feels damn good using 1.5mm Ackerman. But getting those option bits are on my list of things to test.
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Old 05-16-2014, 09:01 AM   #1086
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I figured that would be the case as the 20mm bell crank will give more leverage on the rack over the 18mm. My steering with the standard kit (18mm bell crank) feels damn good using 1.5mm Ackerman. But getting those option bits are on my list of things to test.
Man I wish I could go test and race as much as you get too.
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Old 05-16-2014, 11:47 AM   #1087
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Man I wish I could go test and race as much as you get too.
I would say I'm fortunate to have two nice indoor facilities to race/test at. One is 10 minutes and the other about an hour away, so getting in an abundance of laps isn't an issue. I'm also in the middle (30 minutes) both directions, two dedicated asphalt tracks. I'm a carpet runner but do plan on getting on the asphalt within the next few weeks to see what's good
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Old 05-17-2014, 06:18 PM   #1088
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the spring rates in the manual are listed in "g" how does that compare to lbs.
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Old 05-19-2014, 09:28 AM   #1089
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Anyone?
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Old 05-19-2014, 11:12 AM   #1090
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http://www.petitrc.com/reglages/1-10...pringChart.pdf

300gf/mm = 3.0
280gf/mm = 2.8 etc.
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Old 05-19-2014, 12:08 PM   #1091
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In round figures 26 = 15lb, 28 = 16lb and 30 = 17lb.
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Old 05-19-2014, 12:11 PM   #1092
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Quote:
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the spring rates in the manual are listed in "g" how does that compare to lbs.
red spring: .36 kfg/mm = 20.1 lbs/in
white spring: .33 kfg/mm= 18.4 lbs/in
yellow spring: .30 kfg/mm=16.7 lbs/in
green spring: .28 kfg/mm= 15.6 lbs/in
blue spring: .26 kfg/mm=14.5 lbs/in
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Old 05-19-2014, 01:07 PM   #1093
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Anyone?
Here is the conversion.

Example:

Short Blue Spring .26g ".26 divide by .0179 = 14.52 pounds"
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Old 05-19-2014, 05:04 PM   #1094
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thanks
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Old 05-19-2014, 05:17 PM   #1095
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thanks
Was that enough spring rates for you. Lol
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