Drilling extra hole in FSB for BS
03-07-2008, 01:09 PM
#1
Drilling extra hole in FSB for BS
For those that have done it, I just have two questions:
1) Did you have to remove the entire sway bar, or can you do it by removing the endlinks and rotating it around?
2) How far forward? One of mwood's posts suggested 1/2". It doesn't look like there is much room. Too far forward and the endlinks won't clear. Not forward enough, and it looks like there isn't enough material to grab onto.
Thanks!
1) Did you have to remove the entire sway bar, or can you do it by removing the endlinks and rotating it around?
2) How far forward? One of mwood's posts suggested 1/2". It doesn't look like there is much room. Too far forward and the endlinks won't clear. Not forward enough, and it looks like there isn't enough material to grab onto.
Thanks!
Last edited by balefire; 03-07-2008 at 01:19 PM.
03-07-2008, 01:24 PM
#2
For those that have done it, I just have two questions:
1) Did you have to remove the entire sway bar, or can you do it by removing the endlinks and rotating it around?
2) How far forward? One of mwood's posts suggested 1/2". It doesn't look like there is much room. Too far forward and the endlinks won't clear. Not forward enough, and it looks like there isn't enough material to grab onto.
Thanks!
1) Did you have to remove the entire sway bar, or can you do it by removing the endlinks and rotating it around?
2) How far forward? One of mwood's posts suggested 1/2". It doesn't look like there is much room. Too far forward and the endlinks won't clear. Not forward enough, and it looks like there isn't enough material to grab onto.
Thanks!
2) Sounds like someplace in between.
Maybe 3/8".
03-07-2008, 03:02 PM
#3
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I'll have to actually measure, 1/2" was what I remembered.
Mine doesn't have any interferenced problems with the end links, but it is pretty close on one side when the bar is at full stiff.
Mine doesn't have any interferenced problems with the end links, but it is pretty close on one side when the bar is at full stiff.
03-07-2008, 04:18 PM
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03-07-2008, 04:30 PM
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Makes sense. I have access to a brake, if I run the RX8 more this year, maybe I'll give it a try (third hole each side), it's only a hour or so of work to press, mark, drill and chamfer.
04-07-2008, 08:17 AM
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Just drilled mine last weekend and went with a 25/64 drill. 3/8 is just a little bit too small.
Like others have said, you can drill the bar without removing it from the car.
Like others have said, you can drill the bar without removing it from the car.
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05-26-2008, 04:38 PM
#14
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I'm drilling mine this afternoon. Picked up two drill bits - a 25/64 along with a much smaller 3/32 to drill the initial hole on each side. Depedning on time/light, I'll take a few pics...
06-01-2008, 03:31 PM
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Did my first event on the drilled FSB. The car cornered flatter, seemed to transition faster as well, and overall grip limit 'felt' higher, however, once that limit was reached, the car seemed to push more.
Also felt something weird for the first time in a fast sweeper that led into the finish. Does our torque sensing rear diff go to an open diff if an inside rear tire is lifted?
Also felt something weird for the first time in a fast sweeper that led into the finish. Does our torque sensing rear diff go to an open diff if an inside rear tire is lifted?
06-02-2008, 12:57 PM
#18
that's due to a soft front bar and usually making RH turns, make it stiffer and this will disappear
not sure why you're seeing it with the new bar holes unless you're just pushing the car harder now, or you're on a high grip surface like Peru which is where the problem will really show itself
not sure why you're seeing it with the new bar holes unless you're just pushing the car harder now, or you're on a high grip surface like Peru which is where the problem will really show itself
Last edited by TeamRX8; 06-02-2008 at 12:59 PM.
06-02-2008, 06:42 PM
#19
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Fedex stadium has some pretty high grip asphalt, and yesterday was the warmest event we've had all year. I was definitely pushing the car harder than usual and my co-driver's MaxQ showed peak lateral g's in the 1.2 range.
06-03-2008, 12:20 PM
#21
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Sipe, I'll double check but everything was nice and snug before and after the event (I made a concious effort to check as this was the first time I ran the drilled FSB). The car was transitioning really well through slaloms and the faster offsets. Definitely didn't behave like the front bar was disconnected. It just developed a little more push at the limit (and the rear diff did that funky one-leg thing probably b/c I was driving harder than before on a decently grippy surface).
06-05-2008, 06:17 AM
#23
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I informed my co-driver of my findings, and we're going to have to do another event before making a judgement on how we like the drilled FSB. However, our next event is the DC Pro Solo.
06-05-2008, 03:11 PM
#24
what do I know 
I'll take a wild guess that this was happening in a RH turn 
you might want to consider tweaking your setup, changing the bar and nothing else isn't likely to provide the balance you want
I'll take a wild guess that this was happening in a RH turn you might want to consider tweaking your setup, changing the bar and nothing else isn't likely to provide the balance you want
Last edited by TeamRX8; 06-05-2008 at 03:15 PM.
06-05-2008, 03:50 PM
#25
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The set-up we were using before was based on a drilled FSB (mwood set-up). My lazy butt just didn't get around to doing it until 1-2 weeks ago!
