hood scoop... bond on

B

bomccorkle

I have a 69 mustang and have been toying with the idea of adding a hood scoop. I have a steel hood in good shape and would like to, if at all possible, bond a scoop on. I have read around and around on the other forums of guys doing it and having cracking issues and then again guys doing it the exact same way and having no issues. I guess my question is can I reliably bond a scoop on? Fiberglass and pot metal are all that's really available(and my metalworking skills aren't up to the task of cabbing one up and welding it on) I did bond on some brake scoops about a year ago and they've held up well but then again I'd assume in the dead of winter the hood would see somewhere between 120-140 degrees to a maybe minus 10 in these parts.

TIA

Bo
 
You can't get much better than the Mach1 hood scoop on a 69, just bolt one of those on per factory..
 
I personally have done many fiberglass to metal hood scoops (in the past) and its a toss up on if it lasts a few years or a few months. The best one and the one that lasted the longest had a metal band imbedded in the mounting point of the scoop by the scoop maker. Pot metal scoops and metal scoops you can use panel bond adhesive. Id opt for a bolt on scoop or just buy a molded hood.
 
Fusor has an adhesive I've used for this and I've never had a failure, the hood needs to be stripped to bare metal and coated with SPI epoxy as a first step then follow their directions for attachment. Once bonded on remove any excess adhesive and taper back the edge with a sander or grinder-you don't want any hard edges, apply epoxy primer then use fiberglass mat and resin and bodyfiller to blend in the seam. The epoxy primer adheres well to the steel and the fiberglass and is key to making them work together.
 
I was thinking actually of using a bolt on 429 boss scoop and blending it in. Does 3m have anything comparable to the fusor(I already have a 3m automix gun). I'd assume the matting helps to transition the flex out a was instead of just having one big spot that's flexing. Also I've heard of a flex additive for paint, any insight there maybe?
 
Here's a thread that I started a while back when I ran into a similar situation on a 65 mustang I done for a customer. So far, so good, no cracks, or shadow lines. I followed the advice Bob gave on the fuzor bonding adhesive, the scoop also was a bolt on Shelby style scoop. He didn't want to spend the money to buy the molded fiberglass hood, so I put the scoop on his factory hood. In the end it actually cost him more than the fiberglass hood, by the time I finished all of the body work on his hood, and installed the scoop

http://www.spiuserforum.com/showthread.php?2924-Fibergalss-to-steel

Here are a few pictures of the process.






Kelly
 
carolinacustoms;37180 said:
In the end it actually cost him more than the fiberglass hood, by the time I finished all of the body work on his hood, and installed the scoop
Click to expand...
That'll teach him! :)
 
Haha probably not crash. he is the type that gets something in his mind and will not listen to reason. I tried to explain to him, but he absolutely would not have the fiberglass hood, so I told him I would do whatever he wanted he was paying for it. I told my wife "I'll spend every dime he has if that is what it takes to make him happy" :devilish:

Kelly
 
Ha funny!!! I have given in. Bolt on mach 1 with sequential turn indicators, if anyone says anything about the bolt on.... Well it's required for bulb changes....


I also understand now that its not so much bonding different materials but that the hood, not heat/engine wise, sees a lot of flexing/bending in opening/closing.

I must say Carolina, that hood and car look gorgeous.
 
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