My new Lightwieght Fr Bumper
12-07-2009, 05:45 PM
#1
Instructor
Thread Starter
My new Lightwieght Fr Bumper
I had the fr end of the car apart for some matinace items (rod bearings, turbo replacment, ect.) so I decided to let the kids in the shop take a whack at lightening my fr bumper. I teach Auto tech at the highschool level. The poor kids have to work on Porsches... The horror.
Before you flame me on safety I went with the assumption that a 5mph bumper was fairly usless for a track car. Most of the accadents I see on the track the 5mph the bumper did little to lesson the damge, so in the name of RS Style porsches lighter is better.
Before was 21lbs. After was 12lbs witht the back of the shocks removed and libral use of a 2" hole saw.
I left the top half of the center section in tack for stringth of the tow hook.
Thought youall might just want another something to put on the "todo" list over the winter brake from the track
Before you flame me on safety I went with the assumption that a 5mph bumper was fairly usless for a track car. Most of the accadents I see on the track the 5mph the bumper did little to lesson the damge, so in the name of RS Style porsches lighter is better.
Before was 21lbs. After was 12lbs witht the back of the shocks removed and libral use of a 2" hole saw.
I left the top half of the center section in tack for stringth of the tow hook.
Thought youall might just want another something to put on the "todo" list over the winter brake from the track
Last edited by Silver Rose; 05-11-2010 at 07:28 PM.
12-07-2009, 07:44 PM
#5
Instructor
Thread Starter
Fortunatly the hole saw is alot tougher than the aluminum!!
Porsche Doc- I'm happy to mod your bumper. Now if can just master refilling the bumper shocks with lead..... Hey anything to keep up with ya on the track!!
Porsche Doc- I'm happy to mod your bumper. Now if can just master refilling the bumper shocks with lead..... Hey anything to keep up with ya on the track!!
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12-07-2009, 10:56 PM
#9
Instructor
Thread Starter
Bumper shock--- They are fluid and spring filled. The fluid is under PREASSURE!! Be carful the fluid is flamable (don't ask!!) and will spray all over the place!!! But, there is a lot of wight to be had there.
Lead-The lead comment was a joke as how to add wieght back onto the PorscheDoc's car without him knowing. We run the same DE events at Hartland Park KS and all though we run very simular times (and cars) I have a feeling I am working alot harder than he is just to hang onto his rear bumper.
Lead-The lead comment was a joke as how to add wieght back onto the PorscheDoc's car without him knowing. We run the same DE events at Hartland Park KS and all though we run very simular times (and cars) I have a feeling I am working alot harder than he is just to hang onto his rear bumper.
12-07-2009, 11:54 PM
#12
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Safety...? In the well spoken words of Colin Chapman; WTF does safety have to do with lightness?
Nice - and I'm quite sure it was the shop's hole saw & not yours!
Nice - and I'm quite sure it was the shop's hole saw & not yours!
12-08-2009, 12:23 AM
#13
One suggestion on that mod, for those thinking about doing this. You can remove more material and keep more strength in the unit if you use smaller holes and work in a triangular fashion. If you draw triangles (invert every other one) around each of the holes, and then drill holes at the corners (sized to fit the material, of course), it works very well.
Do NOT do this on a street driven car. If you get in a crash and the insurance adjuster finds this, you'll have a lot of explaining to do and then you'll still get a big red "DENIED" on your claim and then a bigger red "CANCELLED" on your policy. I do a LOT of work for insurance companies and have some insights on some of the things they look for. You don't want to be on the wrong side of something like that, as you could wind up virtually uninsurable.
Do NOT do this on a street driven car. If you get in a crash and the insurance adjuster finds this, you'll have a lot of explaining to do and then you'll still get a big red "DENIED" on your claim and then a bigger red "CANCELLED" on your policy. I do a LOT of work for insurance companies and have some insights on some of the things they look for. You don't want to be on the wrong side of something like that, as you could wind up virtually uninsurable.
