hazard of aerodynamics.... (low ride height = bumper damage)

[mcrews]

Originally Posted by kach22i

Excellent point.

I just looked up what that car looks like, not a variant of the Z-car.

(But you saw a complete side view when you responded to the thread about a kammback on it several weeks ago......)

no....it's the car in the avitar.


I purchased swift springs several yrs ago.(aftermarket lowering springs) desighned for that exact model.
Rear constantly bottomed out and the ride was terrible. I removed the rear and keep the fronts(briefly) I then removed the fronts. and the stock psrings relpaced.
Last year I recieved a slightly used rear set of springs from an 2007 M45 and installed those. They lowered the rear about 1/2 inch and saw no noticeble change in ride quality.
The compressors were installed to test the theroy that a better angle on the front would improve mileage. Which they did. And the ride is much better than with the swift spring kit.

[botsapper]

Having owned lowered vehicles with aftermarket dams, I could relate with the misadventures. Entrance ramps, speed bumps, sudden spring potholes, expressway dips, drainage intersections, etc to name just a few choice locations. The vehicles' shallower entrance angles are always a bich. I've always appreciated the Corvette engineers solution to locate their deepest & ablative center air dams more inboard (feeding big mouth radiators) to mitigate road damage, yet still able to direct less air underneath. Here is an aftermarket solution (the round inlets allow brake cooling). https://www.southerncarparts.com/ima...-Air-Dam-1.jpg

[mcrews]

Originally Posted by botsapper

, yet still able to direct less air underneath. Here is an aftermarket solution (the round inlets allow brake cooling). https://www.southerncarparts.com/ima...-Air-Dam-1.jpg

wow......where were you 5 yrs ago??!!!!

that is very slick

[Gone2]

Originally Posted by ERTW

sports cars can get away with lower ride height because they use stiffer springs, which give them less wheel travel.

you lowered the ride height with STOCK springs, with full range of motion in bump. ditch the spring compressors and buy proper springs.

Normally I would agree with you, but we are not talking about some little Honda or Toyota. It is noted with most luxury cars, such as yours, that the lowering springs are not as stiff as the stock springs. And the spring clamps, so long as checked on a regular basis, are plenty safe for use. The mishaps/horror stories on the internet are from people who install them and never do the follow on torque checks or periodic checking. I am not trying to start an argument, just posting a point.

[mcrews]

i have know several Q45 who used lowering springs (swift is the only mfg for the F50) and then removed them.
Since the Sport model has the electronic suspension I wont/cant use the coilover kits that are a more common method of lowering.

[aerohead]

Originally Posted by mcrews

THe 5" measurement is 39" from the frnt axle.
My gut feeling is there is 'some' relationship to how far uot the front edge is and how much space is 'allowed.'

this picture was posted 2 yrs ago when I had a question on this forum.
over 7" factory stock w/IMPUL body kit.

Ouch!
The SAE recommends a 16-degree approach clearance with 300 lbs of ballast on board.Curbs,gutters,and driveway ramps are supposed to be constructed such that automobiles will always 'clear' if built to the SAE minimum.
Supercars can cheat,as they have active suspension,lowering the car only when it's out of harm's way.

[Sven7]

Sucks. Have you thought about taking the body kit off and constructing a Corvette style air dam?

[mcrews]

I dont have the original bumper any more.
I can fix this actually.

The broken spots on each side had broken over the last yr and I fiberglassed from the rear over Jan.
I had already put on a coat of paint on the driver side and was sanding the last coat of primer on the passenger side.

Here is a pic of the finished work right before the last dark coat of primer.

[kach22i]

Originally Posted by mcrews

(But you saw a complete side view when you responded to the thread about a kammback on it several weeks ago......)

All I saw was these extreme close ups you posted, I had to do a Google image search to get the "big picture". I'm not going to remember things from two weeks ago, I'm too old for that. I also don't know all the Asian car models using numbers because I have no interest in them, they don't do a thing for me.

Originally Posted by aerohead

Ouch!
The SAE recommends a 16-degree approach clearance with 300 lbs of ballast on board.Curbs,gutters,and driveway ramps are supposed to be constructed such that automobiles will always 'clear' if built to the SAE minimum.
Supercars can cheat,as they have active suspension,lowering the car only when it's out of harm's way.

Great information, I'll file this one in my memory banks - SWEET 16.

[mcrews]

Originally Posted by kach22i

All I saw was these extreme close ups you posted, I had to do a Google image search to get the "big picture". I'm not going to remember things from two weeks ago, I'm too old for that. I also don't know all the Asian car models using numbers because I have no interest in them, they don't do a thing for me].

got it.....