lalojamesliz 63 Report post Posted March 21 Has anyone installed a gast tank vent a 69 mustang coupe? My wife and kids chose a gas cap that's not vented. I previously bought a couple of these https://www.summitracing.com/parts/tnk-vvr I was planning on installing them in the rear corners above the tail lights like how i saw on a fastback but coupes have very little space underneath those corners. Any suggestions besides get a vented cap? If I can't mount these then I'll just get a vented cap Quote Share this post Link to post Share on other sites
det0326 202 Report post Posted March 21 I thought the lip on the gas tank neck had a dimple where the cap goes on that allowed it to breath. Or am I thing of the 70 Chevelle I was working on 1 RPM reacted to this Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 21 This should give you some ideas: https://www.vintage-mustang.com/threads/ideas-for-solution-to-venting-the-gas-tank.1074018/page-2 Quote Share this post Link to post Share on other sites
RPM 1,278 Report post Posted March 21 40 minutes ago, det0326 said: I thought the lip on the gas tank neck had a dimple where the cap goes on that allowed it to breath. Or am I thing of the 70 Chevelle I was working on Yep. Mine does. 1 Brian Conway reacted to this Quote Share this post Link to post Share on other sites
RPM 1,278 Report post Posted March 21 23 hours ago, lalojamesliz said: Has anyone installed a gast tank vent a 69 mustang coupe? My wife and kids chose a gas cap that's not vented. You've lost control bro. I think you might be beyond help. 2 Mach1 Driver and det0326 reacted to this Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 22 If you ever think you're in control, its just an illusion... 1 1 det0326 and RPM reacted to this Quote Share this post Link to post Share on other sites
RPM 1,278 Report post Posted March 22 Ain't that the damn truth! Quote Share this post Link to post Share on other sites
Print Dad 61 Report post Posted March 22 what youave is a vent fora seed gas tank…noteeeded on your car. just get a cap and it will do its job save the drilling for another project regular cap will work print dad Quote Share this post Link to post Share on other sites
lalojamesliz 63 Report post Posted March 23 Crap, i forgot I asked you guys hahaha Sorry for not responding Quote Share this post Link to post Share on other sites
lalojamesliz 63 Report post Posted March 23 I recently purchased the modified filler neck from stangs-R-me and I need to see if it has that dimple you guys are talking about. If it does have that dimple I should be able to run a non vented cap right? If the filler necks doesn't have the dimple, can I just add one? I really wanted to run the non vented cap my wife and kids like Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 23 3 minutes ago, lalojamesliz said: I recently purchased the modified filler neck from stangs-R-me What's modified about the filler neck? Quote Share this post Link to post Share on other sites
69RavenConv 309 Report post Posted March 23 Whatever you choose, be sure you've got it properly vented at the end of the day. Believe it or not, I ruined a brand new tank when I was restoring my car. I had some heavy-duty plastic, like two Zip-Lock freezer bags, securely sealing the filler neck while I worked on the body and got it ready for a proper cap. I started the engine one day and the vacuum created by the fuel pump collapsed the tank. True story, I've still got the otherwise "good" tank - if I could post a picture I would :) I understand wanting to use the one your family got but it seems like a lot of effort compared to getting one of the many good-looking OEM styles available. 1 1 RPM and Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites
lalojamesliz 63 Report post Posted March 24 13 hours ago, Mach1 Driver said: What's modified about the filler neck? http://1969stang.com/forum/index.php?/topic/65023-1965-73-mustang-fuel-filler-necks-modified-to-eliminate-splash-out/ Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 24 11 hours ago, lalojamesliz said: http://1969stang.com/forum/index.php?/topic/65023-1965-73-mustang-fuel-filler-necks-modified-to-eliminate-splash-out/ OK, that's Doug. I haven't heard from him in a while. I did a modification to the filler neck to prevent gas from spitting back when filling, and Doug took it a step further, with the help of some tooling he had available. He uses the stock filler neck and modifies it, so it already has the dimple, as does my version. I still use a vented cap underneath the flip-down style cap to prevent Phil's experience two posts above with the collapsing gas tank. The problem with the Tanks Inc. VVR Rollover Vent that you mention is that it has to be positioned vertically with the hose at the bottom and the screen at the top, or it plugs itself and doesn't vent. There are few if any places to correctly and safely position the thing. It needs to be above the tank and outside the car (not in the trunk). Some people put it in the wheel well, but in my mind that's a bad idea. The hose and vent need to be completely clear of the tire. It would also get lots of spray from the tire in the rain- not a good idea in my opinion. As long a you vent the tank you will be alright. Not knowing what your cap does exactly, none of us can make a judgement. Something like the Newton TPV6 or TPV8 tank vent works well, see post #19 in: https://www.vintage-mustang.com/threads/ideas-for-solution-to-venting-the-gas-tank.1074018/page-2. It prevents excessive expansion or contraction in the tank. Expansion would be caused by the fuel expanding on a hot day, and contraction is caused by the fuel pump sucking gas out of the tank. It needs to be positioned as high as possible in the trunk above the tank- like around the trunk latching mechanism. Then the hose must be run outside. Ford stuck the end of the hose into the rear frame rail, see post #27 in: https://www.vintage-mustang.com/threads/ideas-for-solution-to-venting-the-gas-tank.1074018/page-2 . 3 RPM, 69RavenConv and lalojamesliz reacted to this Quote Share this post Link to post Share on other sites
lalojamesliz 63 Report post Posted March 24 5 hours ago, Mach1 Driver said: OK, that's Doug. I haven't heard from him in a while. I did a modification to the filler neck to prevent gas from spitting back when filling, and Doug took it a step further, with the help of some tooling he had available. He uses the stock filler neck and modifies it, so it already has the dimple, as does my version. I still use a vented cap underneath the flip-down style cap to prevent Phil's experience two posts above with the collapsing gas tank. The problem with the Tanks Inc. VVR Rollover Vent that you mention is that it has to be positioned vertically with the hose at the bottom and the screen at the top, or it plugs itself and doesn't vent. There are few if any places to correctly and safely position the thing. It needs to be above the tank and outside the car (not in the trunk). Some people put it in the wheel well, but in my mind that's a bad idea. The hose and vent need to be completely clear of the tire. It would also get lots of spray from the tire in the rain- not a good idea in my opinion. As long a you vent the tank you will be alright. Not knowing what your cap does exactly, none of us can make a judgement. Something like the Newton TPV6 or TPV8 tank vent works well (follow the link in the third post above). It prevents excessive expansion or contraction in the tank. Expansion would be caused by the fuel expanding on a hot day, and contraction is caused by the fuel pump sucking gas out of the tank. It needs to be positioned as high as possible in the trunk above the tank- like around the trunk latching mechanism. Then the hose must be run outside. Ford stuck the end of the hose into the rear frame rail- again, see the link in the third post above and follow it to post #27. I was just looking at the filler neck he sent me and it does have the dimple we are talking about around the 11 o clock position. I was planning on using my welder to make a pocket underneath the rear extension kinda like a small sink hole but that would fill with water wen I wash it or it rains. I noticed the ball valve doesn't immediately plug when push air out through the barbed end with my airgun. Still don't want to collapse my tank. Thanks for the advice, I'll look up those valves and thread Quote Share this post Link to post Share on other sites
lalojamesliz 63 Report post Posted March 24 I was reading through the posts and a evap canister sounds great but so does that TPV8. Wasn't planning on spending $250+ on that right now but if it will keep the gas smell out of my garage, I'll have to consider this. I usually keep my garage closed and locked. I grew up in Los Angeles and dont feel comfortable leaving my stuff exposed or giving someone a opportunity. What do you guys think of the charcoal canister? I can strap it to my SOT 3 section ahead of my fuel tank .... I don't know. That tpv8 sounds really nice but pricey Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 24 There are lots of options in that thread. The TPV8 just allows it to vent, so you could still get odors. The canister is more work if you run a line all the way to the air cleaner. If you make a canister like in #37 it doesn't cost much, and it may help keep the smell down, but if you are running a carb, the bowl vents let it out anyway. And then there is the Tanks Inc rollover- it seems they have found a good place to locate it inside the 1/4 extension. Quote Share this post Link to post Share on other sites
RPM 1,278 Report post Posted March 25 One day my first ex-wife walked out into the garage where I was working and said, boy I love the smell of gasoline. True story. Just saying. Quote Share this post Link to post Share on other sites
Mach1 Driver 632 Report post Posted March 25 Mine doesn't like "The old car smell" 1 RPM reacted to this Quote Share this post Link to post Share on other sites
