Surprisingly I couldn’t find anything, even in the prints.
How is everyone attaching them? I don’t think glue is gonna hold unless I cut into the shell and insert them a little bit.
Last, What do you use to plug up the ends of them?
The real packs had them bolted in through the fiberglass shell, like so:
GB2 pack
I personally did the same thing, but with 1" PVC pipe with a dowel inside of them, so I had something to screw into. They are holding on really well like that. The pipe under the Powercell is actually a little bit wider then the 1" PVC pipe, by like .25" inches but 99% of people won’t notice it anyway.
How long? Does PVC piping go by outer or inner diameter?
inner
Yeah it goes by the ID of the pipe. I have 1" PVC pipe with a 1" dowel glued inside it. Then I used bondo and smoothed over the ends so it looks like one solid piece.
If had a fiberglass pack like that I would put in a metal or wooden plate to tie the two bolts together for reinforcement.
All excellent ideas. How long are they now? 8 -10 inches?
I don’t think the tubes are attached to the shell individually. There’s a plate on which the tubes are welded to. Then everything gets attached to the shell.
Can anyone correct me if I’m wrong?!?
Sefan’s Plans say 6-3/4"..
Regardless if there is a plate on the other side or not. The fact still remains that they are only held to the fiberglass with those two bolts. It would be much stronger with a plate on the back ‘sandwiching’ the fiberglass in between so to speak.
Fiber glass by design is meant to be strong by itself. You should have no problems bolting the 2 tubes to it without the need of reinforcement. You could sandwich it between 2 plates if it makes you feel better, but its probably going to be over kill.
Thanx. I looked but couldn’t find it. I did have a few drinks that night, though.
I glued a wooden dowel inside my injector tubes and then bolted them as well. There was an L-bracket placed against the tubes (hidden by the ribbon cable) as well on the film packs, but as previously stated, the fiberglass should hold plenty strong. In my opinion, the best way to judge the length of the injector tubes on a pack is to check them against the ribbon cable clamp. Based on the pics in the HD screenshots thread, they should stop right around the same level as the left screw on the ribbon cable clamp.
Where are you guys getting these wooden dowels? Are they generally at a hardware store, Ace or HomeDepot?
I suggest some lag bolts similar and a similar arrangement to what is pictured above with some fender (large) washers to help distribute the force over a larger area… You can get wood dowels at just about any hardware or hobby store… Around me Lowe’s has the biggest selection of sizes… On the inside of the tubes rough it up with some 60 grit sand paper or take a grinding wheel on a Dremel and rough it up, some small grooves won’t hurt either… Then epoxy the the dowels in there, and drill a hole in the center of the dowel to bolt into… The reason for roughing up the inside of the tubes is to give the epoxy more to grab onto as it has a tendency to not grab real well to glossy PVC…
Lowes and home depot carry dowel rods, and even square and rectangular dowels as well. (Handy for corner support/box construction)
For ours, I dremelled out the holes, gorilla glued the dowels to the box, and then put gorilla glue on the sides of the dowels (sparingly!!!) and slipped the pvc pipes onto it. As the gorilla glue cures and expands, it’ll make a very strong joint.
For a fiberglass or vacuform pack, I would add additional interior support of some kind. either a metal plate, or (my preference) a wooden block. Wood will be lighter then metal, but should be plenty strong for support. and if you use wood screws to hold the dowels into place instead of gorilla glue, they could be removed for upgrades, or improvements at a later date.
I’m ALL about removable parts now.
-edit-
I got a dowel rod and pvc pipe at Ace Hardware yesterday. $8.00 for a 3ft rod, 10ft pvc and 3 lag bolts.