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1958 - 1981 Pontiac Tech & Restoration Firebird - GTO - Fullsize

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Old 01-03-07, 12:39PM   #1
Rons67
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Default Steel or Fiberglass?

Last summer I purchaced a fiberglass front & rear bumper and a trunk lid for my 67 firebird expecting to shed a lot of weight. Well I am now removing my old chrome bumpers & trunk lid to fit my new pieces & decided to weigh each piece to compare weights. The old front bumper is only 11 pounds heavier than the fiberglass piece. I then removed all the reinforcing webbing inside the steel trunk lid, but left the original mounting pads & latching mechanism then weighed the trunk lids & the steel came in at 13lbs. heavier than fiberglass. I have yet to check the rear bumper, but expect much of the same. I'm not saying that every little bit doesn't count, but it is just a lot less of a difference than I originally thought. I like the Idea of having the hinge & latch with a stock trunk lid that will actually work normally & seal with the original weatherstrip.
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Old 01-03-07, 03:26PM   #2
MrPushrod
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Default Re: Steel or Fiberglass?

I like having hinges, etc...........
If I was trying to shave off time and had a full blown race car I'd do it.
But I have a street car.
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Old 01-03-07, 05:31PM   #3
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Default Re: Steel or Fiberglass?

yep, like someone else said..."just take a dump before you race"
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Old 01-03-07, 06:09PM   #4
Rons67
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Default Re: Steel or Fiberglass?

Thats good, I'll have to remember that one
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Old 01-03-07, 06:17PM   #5
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Default Re: Steel or Fiberglass?

Most of the front end weight is in the doors, I never weighed my doors but I'll bet their 65-75 lbs each with the glass. Bird steel front isn't as heavy as a Goats, because of the rubber bumper. When I did my 68 Goat which included aluminum rad I think it was under 300 lbs savings, the rubber bumper was the heaviest. A 70 Goat is pretty heavy 3800 lbs, with fiber glass doors, fiber glass front end, Fiber seats aluminum rad it's down to 3260 lbs. 69 Bird front windshield is about 70 lbs, I still have all the glass in mine except the doors their lexan.
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Old 01-03-07, 06:51PM   #6
Rons67
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Default Re: Steel or Fiberglass?

I think the problem is I want to save weight, but don't want to take the car to the point of no return to do so. I use it as a drag only car, but everthing still works (even the cigarette lighter) so it can be street worthy with little work! I'm going to re install my chrome bumpers & steel deck lid, and I'm going to sell my fiberglass pieces.
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Old 01-03-07, 06:55PM   #7
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Default Re: Steel or Fiberglass?

Quote:
Originally Posted by Rons67 View Post
I think the problem is I want to save weight, but don't want to take the car to the point of no return to do so. I use it as a drag only car, but everthing still works (even the cigarette lighter) so it can be street worthy with little work! I'm going to re install my chrome bumpers & steel deck lid, and I'm going to sell my fiberglass pieces.
Good move, the first thing we think of is taking off weight. I'll be putting
my steel doors back for the street, sucks not being able to wined down your
windows.
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Old 01-03-07, 07:05PM   #8
Rons67
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Default Re: Steel or Fiberglass?

yea, the side windows being able to roll up & down are important when I'm loading onto the trailer. I can probably do it without rolling down the window, but I,ve done it that way for so many years that it's just habbit now!
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Old 01-04-07, 05:31PM   #9
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Default Re: Steel or Fiberglass?

You got a fiberglass hood yet????
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Old 01-04-07, 08:01PM   #10
Rons67
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Default Re: Steel or Fiberglass?

The hood I'm keeping. I put that on about 10 years ago & found that to shed a lot of weight!! but I dont remember how much
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Old 01-04-07, 11:52PM   #11
Mb125
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Default Re: Steel or Fiberglass?

What size tire you got on the back of your bird and did you do a mini tub?
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Old 01-05-07, 12:01AM   #12
Rons67
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Default Re: Steel or Fiberglass?

I run 29x11 slicks with stock wheelwells! so far traction hasn't been a problem.
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Old 01-05-07, 11:29AM   #13
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Default Re: Steel or Fiberglass?

Where can i see some more pics?
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Old 01-05-07, 03:03PM   #14
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Default Re: Steel or Fiberglass?

There are some shots from the track photographers from VMP 2006 & from Norwalk. I had a aero scoop in primer & lifted the front drivers side pretty high. I've since corrected that with adjustments to my slide a links & new mono springs.
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Old 01-05-07, 07:56PM   #15
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Default Re: Steel or Fiberglass?

Quote:
Originally Posted by M68Bird View Post
Where can i see some more pics?
Where can I see some pics of your 68? I have a 68 street car 400 4 speed that hardly ever sees daylight.
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