I have a question as to what is used for the trim around the hood hinge on my CMC. It seems like a minor issue , but my replica doesn't have it. It would help having it,as I get the vented gas smell through the openings.
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The build manual has the builder using black ribbed rubber hall runner plus there is an under dash plastic pocket that gets fiber glassed in. Try venting the tank into the passengers wheel well.
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There should be a 1/8" vent nipple on the filler neck, I squeeze that almost closed at the very end and slip a 1/8" vacuum hose onto that, then route the hose through "Frunk" passenger wall, make a upward arch - loop in the hose and secure that up into the wheel well then hang down securing it 1" below the pan....Squeezing the nipple almost closed reduces the gas slosh into the hose but the nipple still has enough of an opening to allow for both tank venting and equal pressure in the tank.
If you don't want to go through the trouble of making and securing the hinge boxes you can file the hinge opening so it looks same left and right then cut a piece of rubber, make the hinge slot opening, use contact cement to secure that to the inside of the cable bulkhead.
The gas tank doesn't have a nipple near the top of the filler pipe. If it did I could easily run some drip tubing off of it. I imagine that I could tap into it and add a 1/8 " nipple. That may be the only choice I have.
I imagine I will need to tap into the top of the filler pipe and attach a line in this manner.
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I think you're right, Ray. You could drill a small hole and JB weld a tube in rather than tap it.
@DannyP posted:I think you're right, Ray. You could drill a small hole and JB weld a tube in rather than tap it.
Yes been there done that a number of times
You probably have a vented gas cap if the car has been running fine without a vent hose. Once you have your vent and tubing installed replace it with a non-vented cap or it'll still let fumes into the frunk.
@Alan Merklin posted:Yes been there done that a number of times
@Alan Merklin I need to add a vent to my filler neck also. However, I have been hesitant to drill into the gas tank! Do you remove the tank and purge before drilling?
@Ray Shanahan I have a pair of the boxes for the CMC hinge areas that Wolfgang refers to above. If you want them, you can have them.
@James posted:@Alan Merklin I need to add a vent to my filler neck also. However, I have been hesitant to drill into the gas tank! Do you remove the tank and purge before drilling?
You can stuff a tightly balled rag into the neck below where you'll slowly drill the small vent nipple hole, the rag will keep fumes in and will capture and drilled material.
I installed this cap at the end of my vent line. It lets air in, but keeps gas from spilling out into the fender well.
But if the cap is at the end of the line and gas does make it’s way to that dead end, how is it going to let air in?
It sucks the spilled fuel back into the tank with the air, I guess. all I can say is that it works. I no longer smell spilled gasoline on hard left turns when the tank is 3/4 full or better.
@Eric (McGruff) posted:I installed this cap at the end of my vent line. It lets air in, but keeps gas from spilling out into the fender well.
@RacerX posted:But if the cap is at the end of the line and gas does make it’s way to that dead end, how is it going to let air in?
I used the exact same vent on my line and it’s been working very well. I also did put a high loop in the fuel line where it comes off the nipple on the tank.
I’m a buyer!
@Robert M posted:I used the exact same vent on my line and it’s been working very well. I also did put a high loop in the fuel line where it comes off the nipple on the tank.
I failed to mention the high loop. I did that first and it still leaked in hard left turns, hence the vented cap.
easy, just dont do left turns, problem solved...UPS does similar so they dont have to wait for oncoming traffic,,
Two wrongs don't make a right, but in city traffic three lefts does.
If you want to stop your gas from sloshing around and spilling, like mine used to, I suggesting adding tank foam. It will also keep your tank from exploding if you were to get into an accident. Here is the link for the company that sells it.
http://www.ksrfoam.com/Fuel_Cell_Foam_Kits.php
You can just push it into the tank through the filler. I have enough to do a tank if you are interested in purchasing some.
In every speedster I've done I have yet to have gas running out the vent hose if you follow this .
There should be a 1/8" vent nipple on the filler neck, I squeeze that almost closed at the very end and slip a 1/8" vacuum hose onto that, then route the hose through "Frunk" passenger wall, make a upward arch - loop in the hose and secure that up into the wheel well then hang down securing it 1" below the pan....Squeezing the nipple almost closed reduces the gas slosh into the hose but the nipple still has just enough of an opening to allow for both tank venting and equal pressure in the tank.
foam blocks in the gas tank..i dont know about that remedy
@curtissb posted:If you want to stop your gas from sloshing around and spilling, like mine used to, I suggesting adding tank foam. It will also keep your tank from exploding if you were to get into an accident. Here is the link for the company that sells it.
http://www.ksrfoam.com/Fuel_Cell_Foam_Kits.php
You can just push it into the tank through the filler. I have enough to do a tank if you are interested in purchasing some.
Not to be a jerk, but how does the foam NOT affect the float? Unless you also need to install the centroid type float along with the foam.
I would assume you need to use a Ghia tube type float ?
I have a tube type float. The foam almost completely eliminates fuel in the vapor space. I also vent to a carbon canister.
Thanks Curtiss.