HOOD SCOOP: bolt on or bond? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-03-2004, 02:56 PM
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HOOD SCOOP: bolt on or bond?

which would you guys recomend to have it bonded on or bolted on to my 1966 mustang.

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Old 07-03-2004, 04:01 PM
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How about both. I've seen many a car with a good amount of street miles with a cracked bond job around their scoop!
My old boss at the body shop explained one day that a hood is the most shakable part of a car. It's a big, heavy braced piece of sheetmetal that is mounted at three points.
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Old 07-03-2004, 04:50 PM
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sometimes a bolted on scoop looks beter then a bondoed in one, I've seen georgious cars and the only thing wrong with it was shoddy work when they bondoed the scoop in.
My point: make it look proffesional and it won't mather how you did it.
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Old 07-05-2004, 08:38 AM
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A word of caution materials expand and contract at a different rate I put my scoop on in the summer when it was hot, in the winter when it's cold it shrinks and I have a inward concave place in my scoop ,if I would have bolted it on I don't think this would have happened, it goes right back to normal when it warms up, just my 2 cent's worth. Doc
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Old 07-06-2004, 12:57 AM
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A functional hood scoop usually requires cutting some bracing off the underside of the hood, which weakens the hood and allows more flexing. Not good for bondo/glass with steel.

If you want a functioning scoop go with one that has an internal flange that allows bolting it to the hood from the underside. Then you don't have to worry about cracking. Harwood makes a few of them. Jegs sells them.



Heres what it looks like installed:


If you decide to bond to metal then go here for probably the best system to do it with.
http://www.fiberlay.com/

Here are some alternative sites for scoops.
www.up22.com/scoopw2.htm
www.rodnrace.com/rnr/scoops.htm
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Old 07-06-2004, 01:54 PM
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Can you source or make a steel scoop? If so go that route and then weld it. If you can't go metal, a fiberglass scoop can be put on properly by a professional without any problems. I have a friend with a '71 Z28 with a 454 in it and his fiberglass cowl induction scoop was put on the metal hood more than 12 years ago and there are NO cracks or separation at all. Proper reinforcement of the hood was the key for him. Good luck.
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Old 07-06-2004, 09:32 PM
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If you want a scoop for purley cold air and asthetic...sp?.. reasons you would be better of not cutting any of the structural supports for the hood just the sheet metal in between them. obvioulsy, if it is for under hood clearance, this soultion is not feasable and additional bracing is usually required on a heavty hood with bondo and all that good stuff on it. before you cut, box out the area from the under side with additional support and then cut it out. trust me...you only do it the wrong way once........lol
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Old 07-07-2004, 02:32 AM
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After I cut the hole for my Harwood cowl induction scoop,I
reinforced the opening with aluminum angle. I glued and riveted it in place then glued and riveted the scoop on the hood.
The rivets were slightly countersunk and stayed in place.
The paint man then smoothed it all out and painted it.
Itīs been several years now and if you lift the hood in the middle front no twisting will hurt the scoop. You can see the bonding outline when the hood and scoop are at diff temps, but that is rare, another paint job will cure that.
BTW there is also a support under the scoop should any weight be mistakenly applied to it.
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Old 07-07-2004, 09:18 PM
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thats why i ditched my metal hood on my 68 charger R/T and got fiberglass
#1 lighter
#2 wont ever rust (unless theres fiberglass oxide out there)
#3 i can bond fiberglass scoop to it anytime not worrying about it cracking out like it would on steel hood.
#4 it just looks bad *** with hood pins
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Old 07-09-2004, 07:44 PM
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hood scoops

i would recomend a bonded scoop becouse it looks better sometimes you get a bolt on hood scoop they dont fit right. unless you think you might take it off one day, then i recomend a bolt on.
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Old 07-09-2004, 09:42 PM
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pic

does anybody know of a website where i can find pics of a bolted on scoop i have seen only 2 and they were bad quality.
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Old 07-09-2004, 09:45 PM
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THATS EXACTLY WHAT IM TALKING ABOUT!!!

COOLNESS
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Old 07-09-2004, 11:01 PM
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quality

by bad quality i meant that the pictures were blurry. in real life i have seen 1 with it looked pretty darn good just takes a bit to get used to.
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Old 07-10-2004, 12:36 AM
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Here are two sites with pretty good pics, http://www.aeroglass.com and http://www.UP22.com scoops pages for UP22 here, http://www.UP22.comscoopw1.htm
Also http://www.eharwood.com

Last edited by malc; 07-10-2004 at 12:50 AM.
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Old 07-11-2004, 11:04 AM
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Hoodscoop

Mine is bolted on. I like the way it looks , all depends on the scoop though. Maybe the pic will show up.

Well guess it didnt , dont know how to do it , LOL
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