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  shelby fiberglass hood scoop installation

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Author Topic:   shelby fiberglass hood scoop installation
nash
Journeyman

Posts: 61
From: Nashville, TN, USA
Registered: Nov 2000

posted 02-08-2002 11:19 PM     Click Here to See the Profile for nash   Click Here to Email nash     Edit/Delete Message   Reply w/Quote
A few questions about the fiberglass bolt on Shelby hood scoop installation on a steel hood. My scoop does not lay perfectly flat. Is there anything that you put between the base of the scoop and the hood (gasket, adhesive, bondo)? Also, do I need to fill in the joint between the steel hood and the scoop to blend them in. The hood originally had a mach scoop that was simply bolted on. Also, did what do you use for hardware? I am planning on just a nut and lock washer on each stud with nothing on the top side. I am very hesitant to tighten this down from fear of breaking the studs out of the fiberglass, is this anything to be concerned about. Thanks

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70 Pony
Gearhead

Posts: 1769
From: Glenmoore, PA, USA
Registered: Jan 2000

posted 02-09-2002 04:53 PM     Click Here to See the Profile for 70 Pony   Click Here to Email 70 Pony     Edit/Delete Message   Reply w/Quote
NASH....I hope you get more informed answers than mine....but here is my experience....
My '70 had no scoop.....I added an aftermarket scoop, (with no front vents or turn signals etc) . It was a copy of the '69 '70 Mach 1 scoop.
The fit was good, but I THINK.. the oem's did have a rubber gasket..but I'm not sure.
The studs on my scoop (a few of them) did come out of the scoop after tightening....
I cleaned up the holes and used a 2 part plastic epoxy and reset them.....
I did not spare the epoxy either....loaded it on..let it cure and sit for a few days..
Bolted it back on with just lock washers and nuts....
I replaced that with a Boss 429 scoop from Tony Branda...same problem with the studs...same fix...had to redrill holes and fastened them the same way...so far so good..
NOW ABOUT THAT "GAP".....
Both my scoops had a slight air space, at certain points between the hood and the base of the scoop...just very slight....
If you fill them with fiberglass, I'm told there's a great chance the glass will crack since it's between steel and glass.
The proper way is to SLOWLY ..SLIGHTLY ground the high spots of the scoop...keep putting it on...and grinding again....ALWAYS GRIND WAY LESS THAN YOU THINK...you can always regrind, but not replace.....
I think an easier way is to fabricate your own rubber seal or gasket...lots of stuff out there to use..weather stripping etc...stuff at Home Depot etc....
A nice thin piece of rubber molding...cut to fit the base of your scoop..then tighten the nuts snug, but not so tight to squash the molding...
Then a touch of lock tite on the threads...
I get in the habit of checking my nuts (no pun intended) regularly...
GOOD LUCK.....hope someone more knowledgable answers also...

------------------
EDDIE D
Resto Mod '70 Sport Roof
Arrest Me Red
'02 GT, Torch Red

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Fastymz
Gearhead

Posts: 5145
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 02-09-2002 05:19 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
My scoop was one with a inner flange.No studs,so I took and drilled holes in my hood and scoop and used 11 bolts.I too have small gaps around the scoop.I like Eddies idea about a soft foam gasket.That would work well to give it a nice flush seal.
I dont tighten my scoop down real hard.But it's on there.Like Eddie I check the bolts about twice a month.
I was told you can use body filler around the outside to blend the scoop to the hood better.I not use alot of filler.


SCOOP

------------------
65 coupe,351w,RPM intake,Carter625,shorty headers,2.5 exhaust, Flowmasters,C4,open 8" 2:80,Big Boss 429 hood scoop,Crager SS,Black Suede.
MEM#1240

https://mustangsandmore.com/ubb/Fastymz.html

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mellowyellow
Gearhead

Posts: 4608
From: So. Fl.
Registered: Aug 2000

posted 02-10-2002 07:14 AM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
Not too long ago, I got an 18 wheeler, inner tube on the Fl. Turnpike. They're great for gaskets, etc. I believe I could get a scoop gasket out of it. I like the 68 1/2 CJ, Mach I, hood scoop and would rather have that than the TS hood that I have. Too much water gets in the engine cmpt. How does the air barrier in the front of scoop mount?

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nash
Journeyman

Posts: 61
From: Nashville, TN, USA
Registered: Nov 2000

posted 02-10-2002 10:41 AM     Click Here to See the Profile for nash   Click Here to Email nash     Edit/Delete Message   Reply w/Quote
I found out that you can definately overtighten the studs trying to get it to lay flat as I pulled out 2 yesterday. Anyways they are now epoxied back in. Would bondo work good closing that gap?

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70 Pony
Gearhead

Posts: 1769
From: Glenmoore, PA, USA
Registered: Jan 2000

posted 02-11-2002 03:56 PM     Click Here to See the Profile for 70 Pony   Click Here to Email 70 Pony     Edit/Delete Message   Reply w/Quote
Just my opinion...but I think Bondo will crack after a while...unless you're a good body man..and very neat...
How big are these gaps between the hood and scoop ????
I'm not sure if the bondo will adhere to the steel hood and fiberglass of the scoop....

------------------
EDDIE D
Resto Mod '70 Sport Roof
Arrest Me Red
'02 GT, Torch Red

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Fastymz
Gearhead

Posts: 5145
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 02-11-2002 04:31 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
I'm with Eddie avoid the bondo if you can.
A think seal should work just fine.When I was at a car show this weekend I looked at 3 mustangs with your scoop.All were bolt on's and 2 didn't have a gap at all.And only used four studs.And one had a very small gap you just see a little lite coming thourgh one side.All were not Functional ???

SCOOP

------------------
65 coupe,351w,RPM intake,Carter625,shorty headers,2.5 exhaust, Flowmasters,C4,open 8" 2:80,Big Boss 429 hood scoop,Crager SS,Black Suede.
MEM#1240

https://mustangsandmore.com/ubb/Fastymz.html

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