Gasoline expansion in fuel tank
#21
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A vent in the front of the tank and one in the rear, with a tee well above the tank connecting the two lines would help. That way, no matter what the attitude of the boat, it would gent the vapor and not the liquid.
#22
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fixx
Lot of good tips/ comments here. I too spoke with Mitch for almost an hour a couple of days ago arranging his visit. He gave the entire history of paint (Imrom ,PPG, clearcoat, poly acrylic etc..) more info than I could possibly retain. he did say with certainty.
ABSOLUTELY NO PAINT (IMROM clear or otherwise) will resist gasoline if left on a paint finish for 1/2 hour or more period end of story and he is the undisputed expert in painting!
Here is a pic of mine.
ABSOLUTELY NO PAINT (IMROM clear or otherwise) will resist gasoline if left on a paint finish for 1/2 hour or more period end of story and he is the undisputed expert in painting!
Here is a pic of mine.
#23
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this is exactly correct. the fuel will expand about 2 % before it goes to vapor so there was no 25 % expansion... what happened was the angle of the boat trapped that 25 % air in a non vented space... then that air pocket expanded with the temp and pressurized the tank and pushed the fuel out the first opening it found. and if you clearcoat your graphics with imron, absolutely nothing ... and i mean nothing at all will hurt them. ever
Never store bown down, you shouldnt anyways to let rain water drain out out the transom plug, if it gets really hot try opening the fuel door. Also never leave the boat more than 3/4 full during hot hot days
#25
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you can plumb into the vent line a catch can with top and bottom fittings, run vent line into bottom and continue vent hose out of top to external vent. mount can upright, summit has SS(pn sum-300102). this will allow liquid to fallout of suspension, you can get attwood surge protector(pn 1675-6) vent to stop any liquid from puking out. you want steady rise on vent line, no loops or dips, they can hold liquid and block venting. simpler option, get cpperformance EFI return and tee off threads so vent line liquid fuel will go back into fill instead of out vent line.
#26
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Lot of good tips/ comments here. I too spoke with Mitch for almost an hour a couple of days ago arranging his visit. He gave the entire history of paint (Imrom ,PPG, clearcoat, poly acrylic etc..) more info than I could possibly retain. he did say with certainty.
ABSOLUTELY NO PAINT (IMROM clear or otherwise) will resist gasoline if left on a paint finish for 1/2 hour or more period end of story and he is the undisputed expert in painting!
Here is a pic of mine.
ABSOLUTELY NO PAINT (IMROM clear or otherwise) will resist gasoline if left on a paint finish for 1/2 hour or more period end of story and he is the undisputed expert in painting!
Here is a pic of mine.
well... i will resist being my usual tactless and judgemental self anot not say that your guy doesn't know what he's talking about but when i read this this morning i said to myself... " gee.. this guys doesn't know what he's talking about" . so i went outside and got the test panel that i had done in imron a year ago thats been laying outside in the carrbean sun for about 200 days unprotected and i also cut a piece off an old nissan maxima fender that i had in the junk pile and submerged them both in fuel at 6 am . thats 5 hours ago with raw exposed edges... at last check , 10 mins ago , the paint on both was still hard as a rock. now... i would expect by tomorrow, the nissan part may ... MAY curl an edge where the fuel MIGHT have softend the primer underneith, but the imron which is hard as rock right now, will still be hard as a rock tomorrow and ill bet i can leave it there essentially forever with the same result.
when i was using this stuff on the cars, the most aggressive paint strippers you could buy would just sit there and do nothing. to suggest that a casual fuel bath will wash it away is ridiculous.
addendum.... now a full 24 hrs later and parts removed from fuel immersion... imron part untouched and is as new. nissan part also untouched... even the edge and with a hand rub with a polish, looks perfect.
draw your own conclusions...
Last edited by stevesxm; 07-20-2012 at 05:37 AM.
#27
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well... i will resist being my usual tactless and judgemental self anot not say that your guy doesn't know what he's talking about but when i read this this morning i said to myself... " gee.. this guys doesn't know what he's talking about" . so i went outside and got the test panel that i had done in imron a year ago thats been laying outside in the carrbean sun for about 200 days unprotected and i also cut a piece off an old nissan maxima fender that i had in the junk pile and submerged them both in fuel at 6 am . thats 5 hours ago with raw exposed edges... at last check , 10 mins ago , the paint on both was still hard as a rock. now... i would expect by tomorrow, the nissan part may ... MAY curl an edge where the fuel MIGHT have softend the primer underneith, but the imron which is hard as rock right now, will still be hard as a rock tomorrow and ill bet i can leave it there essentially forever with the same result.
when i was using this stuff on the cars, the most aggressive paint strippers you could buy would just sit there and do nothing. to suggest that a casual fuel bath will wash it away is ridiculous.
when i was using this stuff on the cars, the most aggressive paint strippers you could buy would just sit there and do nothing. to suggest that a casual fuel bath will wash it away is ridiculous.
#28
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well... i will resist being my usual tactless and judgemental self anot not say that your guy doesn't know what he's talking about but when i read this this morning i said to myself... " gee.. this guys doesn't know what he's talking about" . so i went outside and got the test panel that i had done in imron a year ago thats been laying outside in the carrbean sun for about 200 days unprotected and i also cut a piece off an old nissan maxima fender that i had in the junk pile and submerged them both in fuel at 6 am . thats 5 hours ago with raw exposed edges... at last check , 10 mins ago , the paint on both was still hard as a rock. now... i would expect by tomorrow, the nissan part may ... MAY curl an edge where the fuel MIGHT have softend the primer underneith, but the imron which is hard as rock right now, will still be hard as a rock tomorrow and ill bet i can leave it there essentially forever with the same result.
when i was using this stuff on the cars, the most aggressive paint strippers you could buy would just sit there and do nothing. to suggest that a casual fuel bath will wash it away is ridiculous.
addendum.... now a full 24 hrs later and parts removed from fuel immersion... imron part untouched and is as new. nissan part also untouched... even the edge and with a hand rub with a polish, looks perfect.
draw your own conclusions...
when i was using this stuff on the cars, the most aggressive paint strippers you could buy would just sit there and do nothing. to suggest that a casual fuel bath will wash it away is ridiculous.
addendum.... now a full 24 hrs later and parts removed from fuel immersion... imron part untouched and is as new. nissan part also untouched... even the edge and with a hand rub with a polish, looks perfect.
draw your own conclusions...
#29
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#30
Interesting comments on fuel on paint. As a painter i would never tell a customer any type of paint will stand up to fuel Tell ya why . . . . my suppliers dont. Every paint on the market may say at best "fuel resistant". You may have had luck in the past, maybe with old imron (which is probably your best bet) but it was just that . . . . luck. I've seen it go both ways, did a DCU2021 job several years ago and first time out with the paint just months old the owner over filled the tanks and fuel ran down the sides all night long in a hot storage building, four giant streams lifted like stripper right to the gel. On the other hand the vent system in my 38 totally sucks and always pukes fuel yet that has held up fine (its Donzi factory sprayed BASF). The best defense in the end is dont get fuel on it and if it does dont let it on there long. Most paints today are not what they were in the past, much has change as far as how they are made. EPA has had a big impact on the stuff, todays Imron is not what it was ten years ago but its still pretty bad azz.
After seeing this happen quite a few times i wonder if you could add a catch type reservoir in the vent line. Maybe like a water trap for an air compressor (i know ya cant actually use one of those but maybe something like that)
After seeing this happen quite a few times i wonder if you could add a catch type reservoir in the vent line. Maybe like a water trap for an air compressor (i know ya cant actually use one of those but maybe something like that)
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
Last edited by glassdave; 07-24-2012 at 07:36 PM.