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10-01-2009, 06:53 PM
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#1
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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Need Advice IMPORTANT
When I installed the new fuel pump, the wire harness did not match so I had to cut and solder the wires that run the pump motor. Everything was done very clean and there was no sharp edges on the solder job. I sealed the soldered ends with shrink wrap tubing.
I got thinking about the shrink wrap...Can gasoline eat away the shrink wrap? if the shrink wrap deteriorates enough on both soldered wires, there is a possibility they may touch and arc. Spark in a tank of gas = bad.
I have had some of the shrink wrap sitting in a cup of gas for 3 days now without any change, but Im still looking for feedback.
Help/Am I going to die?
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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10-01-2009, 06:55 PM
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#2
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,899
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Spark in gas is fine. Spark in an empty tank is bad.
So, keep a full tank of gas, all the time. :0
Do you know what kind of shrinkwrap you used?
And I am always trying to tell you not to half ass ****... now your gonna blow yourself up...
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10-01-2009, 06:58 PM
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#3
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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It wasnt half assed, I didnt get the right harness with the pump. The LS1 fuel pump and assembly is different from yours...the section that has the soldered wires is in the top 4" of the tank, so it wont be submerged unless I have close to a full tank.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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10-01-2009, 07:04 PM
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#5
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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nothing to worry about,
a spark will not happen nor will it arc. unless you have a loose connection. thats when a arc will happen.
now if you were gonna have the pump armed and have your hands in the tank tapping the 2 leads together than thats a different story.
you won't blow up, so no worries. and if the shrink wrap was gonna melt or deteriate it would have started the process rather quickly (within a few minutes)
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10-01-2009, 07:07 PM
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#6
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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Ok I feel a little better after reading his write up...then again that was posted not too long ago.
He is going to die 3 months before me.
__________________
1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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10-01-2009, 07:09 PM
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#7
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Join Date: Aug 2009
Location: Mount Olive NJ
Posts: 48
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yea man your good. i like the ingenuity with the shrink wrap tho
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1998 z28 with a 2001 ls1,custom 3726R/3728R cam,JS performance p&p heads,ported TB,ls6 intake,slp air lid and TB elbow,160' t stat,slp long tube headers,slp y pipe,bassani true duals,performa built stage 2 4l60e trans,yank 3600 stall converter,10 bolt with 4:10s and moser axles,slp diamond sub frame connectors,spohn sway bar set,eibach drag launch springs
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10-01-2009, 08:05 PM
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#8
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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from what i've read, shrink wrap is made of plastic polymers and so are gas cans.
so in conclusion i say you should be fine.
although now that i think about it, is possible it could melt off b/c of hot wires?
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1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick 
2014 2LT Cruze 2.0 Turbo Diesel
Last edited by FlyingDutchman; 10-01-2009 at 08:08 PM.
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10-01-2009, 08:24 PM
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#9
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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plastic polymer is a very broad classification of materials. The molecular structure of a gas tank and a shrinkable plastic is different.
I really doubt the shrink wrap would melt due to heat. The wires are the same size and there should be negligible resistance at the soldered connection to create heat.
However, you bring up a good point; the wires in the fuel pump assembly and from the kit were probably designed for stock voltage. I think Im going to reconnect my hot wire kit from the alternator to the battery.
__________________
1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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10-02-2009, 07:25 AM
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#10
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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not enough oxygen in there Kirk!!!
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10-02-2009, 09:42 AM
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#11
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Join Date: Apr 2009
Location: Hillsborough, NJ
Posts: 1,099
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Here are the different types of heat shrink tubing and their properties:
Quote:
Chemical-Resistant PVC
Better chemical and abrasion resistance than polyolefin; also resists sunlight.
Flexible Polyolefin
More flexible than PVC and shrinks less lengthwise.
Food-Grade Olefin
Inedible, but nontoxic and resistant to moisture and fungus – this acrylated olefin tubing is FDA compliant for contact with food.
Harsh Environment FEP
Provides excellent abrasion and chemical resistance but doesn't require the high shrink temperature of PTFE.
Harsh Environment PTFE
Has the best abrasion and chemical resistance of any tubing we offer.
High-Strength Harsh Environment PVDF
Great strength and chemical resistance at high temperatures.
Low-Shrink-Temperature Harsh Environment Kynar (PVDF)/Polyolefin Blend
Nearly as strong and abrasion resistant as FEP and PVDF, but shrinks at a lower temperature. Plus, it's more flexible than polyolefin.
Sure-Grip Fabric (Polyethylene/Polyester)
Provides abrasion resistance, resists trapping water, and suppresses noise and rattle.
Fuel-Resistant Elastomer
Ideal for vehicles and machines subject to harsh environments; resists aviation and diesel fuels, hydraulic fluids, and lubricating oils.
Ultra-Flex Neoprene Rubber
Maintains flexibility even at low temperatures.
High-Temperature Ultra-Flex Fluoroelastomer
Withstands higher temperatures than neoprene tubing and delivers better abrasion and chemical resistance while maintaining flexibility.
Waterproof EPDM Rubber
Resists fungus, acids, alkalies, ozone, and ultraviolet light; the resiliency and grip pressure stay strong even after years of exposure. Can also be buried and submerged.
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Last edited by Whiplash Performance; 10-02-2009 at 09:42 AM.
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10-02-2009, 10:32 AM
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#12
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Join Date: Dec 2005
Location: Mays Landing, NJ
Posts: 7,108
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If you were that worried why didn't you just get another, correct wiring harness? 
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10-02-2009, 10:51 AM
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#13
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Kirk,
I know a guy in charge of some fluid dynamics engineers. I'll try and get an answer from them. Whose shrink wrap did you use?
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