924Board.org

[joecitizennn]

A carerra gt hood scoop seems to go for around 200 bucks these days. If you are like me that seems a little high for a hunk of fiberglass. Luckily wal-mart sells the materials to make your own for less than 50 dollars.

What I bought,

Two cans of polyurethane expanding foam.
One can of fiberglass resin.
One pouch of fiberglass matting.
One can of short strand fiberglass.
Can of primer.

I had no hood scoop to go off of so i had to use pictures. I simply drew one on my hood.

Then applied a layer of tape so the finished product could be removed from the hood.

Then I applied a couple layers of foam.


carved it into the shape I wanted.

Sanded it a bit. (yes you can sand expanding foam, it is awesome stuff)

Looks a little better than the pile I started with.

Important! You must cover the foam with tape, or the fiberglass resin will soak into the foam, firstly wasting resin, secondly eating the foam, third, you want to remove the foam from the scoop when you are done, and tape makes an easy removal.

Then follow the directions on your can of fiberglass resin and lay 2 to 3 layers.

When the fiberglass hardens block sand it as much as you can without sanding through the high spots into the foam.

Then fill the low areas and imperfections with short strand fiberglass. My favorite way to mix epoxy fillers is on paper plates with plastic spoons. It makes clean-up easy.

Now fill and sand, fill and sand till you get a nice smooth surface. This takes a while sometimes.


When you have it where you want it, squirt it with some high fill primer to see what you have got.

If you like what you see, now is the time to pop it off the hood. I used a kitchen utensil for the job.

Since I used the tape, the scoop was easy to separate from the foam model as well as the hood. Make sure to apply fiberglass to any thin areas on the underside. To find any thin spots hold the scoop up to a bright light and look for any light glowing through.

This is what I ended up with.



Sneak peak at my latest project car.

[JayZzzz4]

Noooooo WAy!!!!!!!! That's AWEsome!!! Looks beautiful. How many hrs did it take? You might want to make a mold of that and start selling them. I've been trying to work with fiberglass lately, it's a little tricky. I'm trying to think of a way to do side skirts and I've been thinking about using spray foam and fiberglassing over it. Now seeing your work I think that might be the way to do it.
_________________
White 1987 Porsche 924S manual

[Scorpio]

Excellent how to...i used the same method to incorporate a double din holder into the dash...
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

[Joes924Racer]

yea Excellent. I like it.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[924aussie]

I am too lazy and would just buy the finished product, that said good job


Alan
_________________
green 924 .. 1980 rego 924PSH
1998 Mopar Neon ... sick
2003 Challenger / Montery 4WD
1995 Hyundai Scoupe ... sold
1998 Nissan Silvia ... sons back from OS he has taken it
BIG BLOODY MOTORHOME 300zx Sold
1980 Fire truck Sold

[joecitizennn]

[JayZzzz4]

So removing the foam from the fiberglass was easy with tape? Did the foam break apart in the process? The reason why I ask this is if I make a universe side skirt (same shape for both sides) can I remove the foam from the fiberglass and then fiberglass it again? This way would be easier then foaming both sides and trying to get the geometry so be the same. Thanks
_________________
White 1987 Porsche 924S manual

[joecitizennn]

In all likelyhood the foam base will not be reuseable. It did remove easily because I used tape preventing the resin from entering the foam, but the resin is so aggressive that it attacks the foam and actually shrinks it a little, even through the layer of tape. THis does not affect the shape of the resin form because the resin hardens long before the foam begins to shrink.

[Rasta Monsta]

Impressive.
_________________
Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[PORSCHEV]

Great job!!

Why did you use the hood as your working surface? To get the contour?
_________________
1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

[ideola]

Joe, nice job, and nice writeup as always. You always make it look so easy!

Question: that is an interesting looking bumper arrangement there on the sneak peak of your project...what's going on there???
_________________
erstwhile owner of just about every 924 variant ever made

[Joes924Racer]

You can also dissolve the foam.. learned that trick from a hobby dude.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

[joecitizennn]

[joecitizennn]

[ideola]