mold cowl scoop to hood

[blownbluebird]

i have a 79 firebird that i got a flat pin on fiberglass hood and i wana mold a 6" cowl to the hood. what is the best way to do this and it hold and last? i also wana add about 8" to the scoop. whats the best way to do all this?:-KFC

[68 nova 10.5]

i take it you want to make the scoop longer not taller? I would get another Identical scoop and cut 8" out of it and graft it into your scoop however you may not beable to do this if the scoop gets wider from front to back. if that is the case your going to have to cut the scoop in half then temporaily attach it to the hood where you want it and make a mold to lay up your part and then take the scoop backoff and fiberglass the peices together if you have no fiberglass experience its gonna look like shit . you will have an ass load of time in it as well just a guesstimate off the top of my head just in legthening the scoop with making an extension peice your going to have at least 30 hours involved and like i said if you have never made a fiberglass peice before ughhhhhhhhhhhhhh to install the scoop lay it out on the hood where you want it trace it with a pencile draw a line an inch inside your 1st line and cut it out put the scoop back on the hood and drill pilot holes 1/8" every 4 or 5 inches or so through the scoop & the hood grind the hood with 24 grit 3 inches out from your cut as well as the bottom of the scoop ( make some refrence lines on the hood so its easier to get the scoop lined up later) the holes work but they are hard to find any ways get some 3m 8115 its a 2 part bonding glue (very strong) and put a bead around the flange of the scoop and locate it precicely and screw it down with some self taping screws careful not to tighten to tight and deform the scoop let glue set (not cure) then remove the screws after cureing grind with 36 grit to blend the scoop into hood and underneath with duraglass personaly id just get the underneath to look ok and leave it at that on the top blend seem out with bondo block sand prime as usual ps 8115 is the best thing to use it costs 30 bucks but you have to buy a special gun to use it or you can get it out of the tubes and mix it 50/50 but its messy hope this helps if you need help with the scoop lengthening i will help the best i can on here ........................................Glenn

[gilsbachracecraft]

http://i237.photobucket.com/albums/ff244/gilsbachracecraft/fiberglass/DSC01044.jpg
http://i237.photobucket.com/albums/ff244/gilsbachracecraft/fiberglass/DSC01037.jpg
http://i237.photobucket.com/albums/ff244/gilsbachracecraft/fiberglass/2-24-05028.jpg

http://i237.photobucket.com/albums/ff244/gilsbachracecraft/fiberglass/3-8-05030.jpg

[68 nova 10.5]

nice work bill

[blownbluebird]

thats what i am lookin to do to a T. thats great

[HAULIN' IT]

Bluebird, I will give you my opinion on how to go about this. One thing that needs to be said: Autobody is like alot of things, everybody has a different way to do something. Being a new guy, I don't want to step on any toes! I joined this site to learn from others & help others learn. I'm an shop owner & have been doing bodywork most of my life. As Glenn said " it's going to be an ass load of work" for a guy with limited use with these products or the right tools (good size air compressor & air sanders,ect.). But do not be discouraged, it can be done by a novice, but it will take longer. Rule #1-The hood must be supported on the sides where the reinforcements run or by the tabs holding the hood to the car(all of them), not having the weight on the "skin" of the hood at anytime. If you have the car handy I would figure the mounting areas first & do as much of the work on the car( I know, on a finished car this may not seem like the best) you don't want the hood sitting on a workstand bowed one shape & put it on the car & it turn into another. You need a mask (at least a good disposible one)fiberglass dust is not good for you lungs! Start by grinding back the gelcoat on the sides of the scoop & taper the back edge 3or 4" in on the back edge, find the center on the hood,grind the scoop as needed to make it lay on the hood with a mininum gap, grind the gelcoat off around on the hood, mark around the scoop(in pencil), lift off the scoop, move in an inch & cut your hole, grind the gelcoat away around the hole. Now I'm guessing your wanting to extend the scoop to the windshield, right? Make a "crude" form out of thin aluminum or steel sheet stapled to wood blocks, ect. to match the contour of the scoop sticking out the back(be sure it's slightly low everywhere), tape it under the back of the scoop & prop up the rear on whatever,. Use fiberglass mat & resin poured & layered over the mold, built up over a few layers. Once the top is built up, turn the scoop over & peel off the mold( an air blowgun under the corner will start it). Cut a thin piece of corrigated cardboard big enough to cover the majority of the new part & several inches onto the original scoop, soak the cardboard in resin & lay it in the bottom- rolled up the sides a little. Cover all of the cardboard with resin & mat, smooth as needed. I prefer Fusor products for attaching(100 ez heat-set)It's all in what you get used to using, the 3m & others work well. Put down a BIG bead just on the inside of the line you drew & lay the scoop in it. Pump out & spread a wide bead of adhesive, cut strips of plastic drywall mesh 6-8" long, lay them in the glue. Once dry flip the hood over & pump a BIG bead & spread on the inside & insall more mesh. Flip the hood over & grind off any lumps & spread more adhesive(burrying ALL of the mesh) Spread a coat of Duraglass over all of the seams, Sand & finish with regular filler( you need to cover ALL of the fiberglass with filler), prime & smooth ,ect. Any Qusetions, just ask. Lorne

[gilsbachracecraft]

http://gilsbachracecraft.com/customers_cars/mike_foulk/pages/I%20Front.htm (http://gilsbachracecraft.com/customers_cars/mike_foulk/pages/I%20Front.htm)
http://gilsbachracecraft.com/customers_cars/mike_foulk/pages/L%20foulk.htm