Rallye Hoods heavier/different hinge springs?

[ChallengerHK]

I was reading this ebay ad:  http://cgi.ebay.com/ebaymotors/MOPAR-CUDA-CHALLENGER-RALLEY-HOOD-HINGES-N-R_W0QQitemZ170208598044QQcmdZViewItem

Long story short, the ad says that a) Rallye hoods were heavier, and b) hinges for rallye hoods have springs with more coils to account for the extra weight.

What I recall of physics is that the longer a spring is, all other factors being equal, the more give it has, so wouldn't a longer spring be weaker? Also, I would think that rallye hoods and plain hoods have about the same amount of metal. Am I wrong on either/both of these?

[CHUCKS71]

 

[bb71challenger]

Have had cars with both types of hoods and never noticed a difference between them. They are pretty strong springs and whatever the weight difference, I doubt it would be enough to warrant a different spring. The T/A AAR hoods were different but we are talking about a huge amount of weight difference and a hood made of different/weaker material

[ChallengerHK]

If this guys has hinges with longer springs, is it possible he has TA hinges, or does he just have the wrong springs on what he has?

[fantum]

Back when I had my first Cuda I changed it from a flat hood to a rally hood.  I had no problems with the springs, and I had the car for another 5 - 6 years after I swapped hoods.  I really do not think there was a noticeable difference.

Now, the fiberglas AAR hoods, that's a different subject.

Hope this helps,


fantum

[ChallengerHK]

Back when I had my first Cuda I changed it from a flat hood to a rally hood.  I had no problems with the springs, and I had the car for another 5 - 6 years after I swapped hoods.  I really do not think there was a noticeable difference.

Thaks for the info, fantum. I'm not buying these, just wondering if his info is correct.

[bb71challenger]

No expert at all on T/A hood springs but that might be what your friend is talking about. Dont the T/A springs have a smaller diameter which in turn would mean more coils for the length?

[duodec]

The '70-71 parts book lists the following for Challenger and Barracuda hood hinges and springs

The spring listings are a little weird; that first spring (-088) lists quantity 1 for Barracuda; it is NOT the pop-up spring so I don't understand the listing.  There's also no callout line for a non-fresh-air hood; perhaps that was serviced only as the 'hinge assembly'?  Also no lines for '70 only springs so perhaps the -088 spring is for all Barracuda except '71 only fresh air and both year fiberglass?  And the -092 is for all Challenger except the fiberglass hoods.

Why Barracuda gets a different spring for normal and fresh air hoods, and Challenger doesn't is interesting; the Challenger hood of any type is probably heavier than the Barracuda due to the extra length, but a fresh air option probably adds the same poundage to a Challenger hood as a Barracuda.

Maybe its the proportional difference; the added weight on the Barracuda hood necessitated a (presumably) stronger spring, where it wasn't enough to require an even stronger one on the Challenger. (Challengers after all are stronger than the fishmobiles ; )


Hinge, 1970 Barracuda and Challenger                2945842/3
Hinge, 1971 Barracuda and Challenger                3548890/1
Hinge Assy. 1971 Barracuda and Challenger        3582518/9

Spring, Barracuda                                                3586088
Spring, 1971 Barracuda with fresh air                  3586092
Spring, Challenger                                               3586092
           (also Belvedere/Charger/Satellite/Coronet w/Fresh air)
Spring, Barracuda, with fresh air, fiberglass hood   3586215
Spring, Challenger, with fresh air, fiberglass          3586214

[ChallengerHK]

Curiouser and curiouser.