slngsht Posted March 10, 2008 Share Posted March 10, 2008 How much ground clearance do you run? Now that my oil pan is flush with the bottom of my tubes, the bottom of the car is COMPLETELY flat, and I can drastically drop the ride height. So, what do you run on: 1. The street 2. Autox 3. The track I think a semi-practical minimum would be 3" in the front, 5" in the back (in the back, that's probably the lower point I can set to still have reasonable travel). My oil pan used to be 2" off the ground, which was pretty much a total hassle. What say you? Link to comment Share on other sites More sharing options...
Boxologist Posted March 10, 2008 Share Posted March 10, 2008 ask ur nephew for his recomendation :rofl: Link to comment Share on other sites More sharing options...
slngsht Posted March 10, 2008 Author Share Posted March 10, 2008 ask ur nephew for his recomendation :rofl: I said "3", he said "you said 30, right?" Link to comment Share on other sites More sharing options...
solder_guy Posted March 10, 2008 Share Posted March 10, 2008 3" in the front, 5" in the back Works .. with the exception of going over those damned speed breakers ! :cuss: Rob Link to comment Share on other sites More sharing options...
yellowss7 Posted March 10, 2008 Share Posted March 10, 2008 75mm in the front under the sump. Don't know the rear height. Just don't hit a squirel or you'll be high Centered. :ack: Tom Link to comment Share on other sites More sharing options...
slngsht Posted March 10, 2008 Author Share Posted March 10, 2008 75mm in the front under the sump. Don't know the rear height. Just don't hit a squirel or you'll be high Centered. :ack: Tom Tom, is that with 15" wheels or your autox setup? Link to comment Share on other sites More sharing options...
Ian7 Posted March 10, 2008 Share Posted March 10, 2008 At you go significantly lower, your front suspension geometry is going to be compromised to the point where it negates any gains from lower c of g. Also think about suspension and damper stroke. If the damper tops out under cornering chassis roll, the "infinite spring rate" effect also wipes out any gains with alarming effect. Link to comment Share on other sites More sharing options...
slngsht Posted March 10, 2008 Author Share Posted March 10, 2008 At you go significantly lower, your front suspension geometry is going to be compromised to the point where it negates any gains from lower c of g. Also think about suspension and damper stroke. If the damper tops out under cornering chassis roll, the "infinite spring rate" effect also wipes out any gains with alarming effect. This is as part of a redesign of the front suspension pickup points, so that will be my true static ride height, with camber, toe, etc... analyzed throughout the range of motion, not just lowering the ride height on my existing design. Link to comment Share on other sites More sharing options...
yellowss7 Posted March 10, 2008 Share Posted March 10, 2008 That's with my 13 inch 175/55/13 Avon CR500 street tires and rims.. Slightly lower with the slicks. Link to comment Share on other sites More sharing options...
BobDrye Posted March 10, 2008 Share Posted March 10, 2008 This is as part of a redesign of the front suspension pickup points, so that will be my true static ride height, with camber, toe, etc... analyzed throughout the range of motion, not just lowering the ride height on my existing design. Maz: I don't think that static ride is as important as the dynamic height is with weight transfer under breaking. I know that I use softer springs than most, as I can stand on the front of the car and get the frame to touch the concrete, but as I watch the movement of the front suspension I don't see that much movement when I brake hard on the road. ??????????????????????????????????????????????????????? :ack: :ack: :ack: Link to comment Share on other sites More sharing options...
Kitcat Posted March 10, 2008 Share Posted March 10, 2008 The only car I ever saw roll at an auto-x (without hitting anything) was a Datsun 2000 roadster with a "trick" suspension. Unfortunately, it was so trick that it went solid under hard cornering on sticky auto-x tires and over she went, right in the middle of the parking lot, 1/2 thru a hard right hander. Link to comment Share on other sites More sharing options...
BobDrye Posted March 10, 2008 Share Posted March 10, 2008 The only car I ever saw roll at an auto-x (without hitting anything) was a Datsun 2000 roadster with a "trick" suspension. Unfortunately, it was so trick that it went solid under hard cornering on sticky auto-x tires and over she went, right in the middle of the parking lot, 1/2 thru a hard right hander.[/quote I raced go-karts for years and you could get them up on 2 wheels at times in a corner. :7head: Link to comment Share on other sites More sharing options...
slngsht Posted March 10, 2008 Author Share Posted March 10, 2008 Maz: I don't think that static ride is as important as the dynamic height is with weight transfer under breaking. I know that I use softer springs than most, as I can stand on the front of the car and get the frame to touch the concrete, but as I watch the movement of the front suspension I don't see that much movement when I brake hard on the road. ??????????????????????????????????????????????????????? :ack: :ack: :ack: How much anti-dive do you have built into the front geometry? Link to comment Share on other sites More sharing options...
BobDrye Posted March 10, 2008 Share Posted March 10, 2008 About an inch just on the lower control arms. :) :) Link to comment Share on other sites More sharing options...
slngsht Posted March 10, 2008 Author Share Posted March 10, 2008 About an inch just on the lower control arms. :) :) Bob, do you know what % anti-dive you are running? right now I'm targeting around 50%. Link to comment Share on other sites More sharing options...
gjslutz Posted March 11, 2008 Share Posted March 11, 2008 I have a little less than 2.75" at the Pan/ Tran on the Birkin static. It was lower when I purchased it. I watch the road very close. Gary Link to comment Share on other sites More sharing options...
BobDrye Posted March 11, 2008 Share Posted March 11, 2008 Bob, do you know what % anti-dive you are running? right now I'm targeting around 50%. Maz: It's hard to remember what I did 5 years ago. I think that 50% is correct. :7fume: Link to comment Share on other sites More sharing options...
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