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Is anyone racing using the RRT Camber Plates with the SKF mounts? My understanding is this will not quite be -3 degrees. I know Toyo recommends -3 degrees or more as optimal for the RA-1s. Will this be enough negative camber for this car?
Thank you,
Thomas
Thomas,
When i ran JS I was using fixed camber plates as well as offset crash mounts and I was getting about -3. I find it hard to believe that with just camber plates you’ll get -3. However, my buddy recently saw someone with the RRT plates who had -3.5. I think there is something else going on there personally but since I didn’t witness it I can’t say for sure. Note also that part of the camber in the JS kit is due to the lowering provided by the shocks/springs, which is more than we can achieve with the race springs and sport shocks. I would recommend contacting RRT to see what they have to say aobut it. Their plate do seem to offer more camber than typical products.
Hope this helps!
Thank you, Jack. I am also asking how much negative camber the other spece30 people are running. Has anyone gotten to the point of needing and USING the adjustable plates in this series i.e, is anyone changing their setup from track to track?
Thanks again,
Thomas Miller
Thomas,
Since we don’t have our cars to that point yet I can’t tell you how much we are running. ; ) What I can tell you though is that my plan is to run -3.5 to start. We’ll see how that goes and adjust from there if needs be (and if it’s possible). I fully intend to run adjustable camber plates though. I would guess that most are running nearly -3 or so. The nice thing about the Toyos (in my experience on a nearly stock suspension) is that they will wear evenly if you are willing to get the car sliding a lot. In this series I expect that is the way to be fast, it was in JS so I expect no different here. But once we get our cars out there we’ll know better!
I am not sure whether ireland sources their camber plates or manufactures them, but I am running spec-e30 suspension with fixed ireland camber plates on offset upper strut mounts to the tune of -3.2/3 degrees on the fronts. The car works great…
Post edited by: kchildre, at: 2005/07/23 07:06
The one car I saw with RRT plates was at 3.5/3.6’ As Jack mentioned we have yet to start our car(s)
"9.3.8.5. Any suspension setting (toe, caster, camber) not requiring machining or modification to factory parts is allowed. 9.3.8.6. Springs must remain as originally supplied by the factory, unless specified…"
I believe this has come up before, and if memory serves right the above statement disallows the use of offset strut mounts? I just wanted to check again, as I’m stuck at -2.5 degrees w/o them & would like to get a bit more if I can do so within the rules…
Aren’t the offset strut mounts factory crash repair pieces and therefore legal?
That’s my read of the rules.
Now for the cars that want even more camber.
It is common to tweak the housing/axle on E30’s in other forms of racing to get added camber.
http://digest.net/bmw/archive/v5/msg01615.html
Jeff Ireland talks about it here:
http://www.bmw2002faq.com/suspension_steering/camber.html
Yeah it is 2002 stuff but it applies to E30 stuts as well.
My read of the rules is that this is illegal. If it happened in a "pothole" or on purpose.
So what is the most camber you could theoretically get with LEGAL components?
Ric
Well, as these methods require bending of the strut, I would consider this to be modification or machining of specified parts (of course the rules state that factory parts cannot be modified, but does not mention non-factory spec’ed parts…), which would not appear to be within the rules.
If I remembe right, on a thread a while back most racers were quoting front camber in the 2.2-3.0 range, which appears to work ok for e30’s. However, for some tracks it would be nice to be able to get a bit more.
I’ll try searching to see if I can find anything on this from the past…
Just finished installing my new Kmac front camber plates and putting the car on a BMW laser aligment rack.
Got 3.1 deg neg camber both sides and and 9.5 deg of caster. Any more than that I don’t think would be all that helpfull
No modification to springs or strut towers. No bending or cutting, no need to exploit rule book grey areas…No question if it’s legal, cause it is.
OBTW, toyo recommends to run 3.0 deg for the RA-1’s
Post edited by: brain, at: 2005/08/25 18:46
There are stock height camber plates available now. I have two pairs sitting next to me right now. I really don’t want the extra 1/4 inch or whatever of stack height on my front end. The car rolls enough as it is.
I have the RRT max camber plates, with stock centered upper strut mounts.
I measured the camber at -3.6 degrees.