Heavy duty upper A Arms
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Heavy duty upper A Arms
Could someone who has fitted these advise on how successful the increase in positive caster was in improving the straight ahead driving of their vette?
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
The trade off is that while increasing caster will increase straightline stability, doing so will reduce responsiveness. IMCO one should only do this if you have power steering and/or aren't chasing down every last ounce of handling performance. My $.02
TSW
TSW
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Thanks guys, it looks like these will make it to the shopping list when the budget allows, I find the steering a little over responsive when travelling straight ahead. I added a shim to the PS pump to decrease the pressure slightly to give the steering more weight which helped. R&P would be nice but not compliant to use here and or very expensive to get compliance:-(. I believe I can live with a little less responsiveness for the way I use the car FWIW the car seems to have almost no self centering action in the steering at present.
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
Aluminum a-arms from Speed Direct:
http://cmc.speeddirect.com/itemdesc....-87416&eq=&Tp=
Steel from VBP:
http://www.vbandp.com/index.php?page...mart&Itemid=80
http://cmc.speeddirect.com/itemdesc....-87416&eq=&Tp=
Steel from VBP:
http://www.vbandp.com/index.php?page...mart&Itemid=80
Melting Slicks
Joined: Jun 2003
Posts: 2,802
Likes: 241
From: Niles, MI
Last edited by Kid Vette; Jun 24, 2014 at 09:21 AM.
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Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Just to follow up...
Note that the Speed Direct aluminum a-arms will also increase front camber gain, which means less static camber is required. Further, they have caster adjustment slots, so only camber requires shims.
FWIW, given that power steering systems somewhat mask true feedback, the apparent effect of improved feel had by dialing in additional caster is more a result of increasing the steering effort. Manual steering here, but whatever floats your particular boat is what you should go for.
OK, I guess that's $.04 now.
Note that the Speed Direct aluminum a-arms will also increase front camber gain, which means less static camber is required. Further, they have caster adjustment slots, so only camber requires shims.
FWIW, given that power steering systems somewhat mask true feedback, the apparent effect of improved feel had by dialing in additional caster is more a result of increasing the steering effort. Manual steering here, but whatever floats your particular boat is what you should go for.
OK, I guess that's $.04 now.
Thread Starter
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
Mmm Speed Direct look nice but way too spendy by the time they were landed here:-( I have to go with something that looks fairly stock so that the compliance police don't pick it up here or you can be ordered off the road. Each compliance certification costs $700.00