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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Dewey316 The Lama

Joined: 08 Jan 2004 Posts: 7295 Location: Bringing the tech
1990 Chevrolet Camaro RS
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Posted: Tue May 30, 2006 3:34 pm Post subject: |
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Are you going to replace the hard lines, or just the soft lines?
Both myself and Twilightoptics have converted the soft lines over to -6AN braided line.
I am not sure about that blue stuff, for the price you could get braided line. IIRC I used about 10ft of braided line, to do both the feed and return line on my car.
--John |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Tue May 30, 2006 4:16 pm Post subject: |
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| I wouldn't think of replacing hard line with soft line. If you are just replacing soft line then you don't really need anything exotic. It doesn't add to the performance of the car. |
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Dewey316 The Lama

Joined: 08 Jan 2004 Posts: 7295 Location: Bringing the tech
1990 Chevrolet Camaro RS
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Posted: Tue May 30, 2006 4:19 pm Post subject: |
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| Yes, but if you go to the race track, you have to be careful. NHRA rules say you are only allowed something like 6" of rubber fuel line. A picky tech inspector will fail you, if you have a long run of non-braided fuel line. |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Tue May 30, 2006 4:45 pm Post subject: |
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I was thinking of replacing the hard lines from the gas tank to the engine. I think too much heat is getting on the fuel line because of the way i routed the exhaust. The car starts starving for gas after i drive it for about a half an hour. It did it the last time i went to PIR. I drove the car there, made one pass, and on the second pass the car crapped out. I let the car sit for 45 min to cool down and it ran fine on the next pass. _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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Dewey316 The Lama

Joined: 08 Jan 2004 Posts: 7295 Location: Bringing the tech
1990 Chevrolet Camaro RS
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Posted: Tue May 30, 2006 4:51 pm Post subject: |
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| I think you would be best, on looking at re-routing things with the exaust. Where is it that the fuel lines are getting that close to the exaust at? |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Tue May 30, 2006 5:00 pm Post subject: |
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The lines close on the drivers side. My exhaust dumps out on both sides before the back tires. _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Tue May 30, 2006 7:18 pm Post subject: |
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Have you looked into other potential sources for the problem? That explanation seems a bit foggy.
Hard lines protect against rocks and other damage. |
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Nathan J Member
Joined: 24 Dec 2005 Posts: 161 Location: spokane
1986 Pontiac Firebird
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Posted: Tue May 30, 2006 7:21 pm Post subject: |
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push lock hose is just as legal as braided line for the nhra, it is rated just as high as braided line psi wise, just reamber braided line is just rubber hose with a braided 'cover' just reamber to check it out in about 4-5 years it will start to leak but its hard to tell becasue of the braids.
nathan _________________ 86 firebird
383sbc
th350 t brake
4th gen rear soon 9in ford rear |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Tue May 30, 2006 7:22 pm Post subject: |
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| Dewey316 wrote: | | NHRA rules say you are only allowed something like 6" of rubber fuel line. |
You be right. It should only be used at flex points.
Steel braided hose will cut through nearly anything. It is really abrasive. My '94 Vette had some braided fuel line in the engine bay that rubbed through an electrical loom.... This caused a short to the steel sheeth of the line which blew a hole in it.... Then fuel sprayed everywhere with sparks flying around.... Then the car caught on fire. What a day that was. |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Tue May 30, 2006 7:31 pm Post subject: |
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It could be the fuel line or the electric fuel pump. Who knows? This weekend i'm going to work on the problem and try to fix it. _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5476
1987 Pontiac Formula
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Posted: Tue May 30, 2006 7:39 pm Post subject: |
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Is it an in tank pump? or is the pump up front? If the pump is in the rear or in the tank then all the fuel line is under pressure and heat won't cause problems. If you have the pump up front then the fuel line is under vacuum and just a little bit of heat will cause it to boil and vapor lock.
Have you deleted the vapor canistor? If so how is the tank vented?
One more thing, summit sells rolls of aluminum hard line too. You can get 25 ft of that and just run it underneath, then use the good soft lines for connections. |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Tue May 30, 2006 7:44 pm Post subject: |
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The fuel pump is up front. I took the vapor canister out, and the line is just sitting there. _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Tue May 30, 2006 7:51 pm Post subject: |
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| I had some friends that tried to use the aluminum line and they found it to be flimsy and easily collapse when trying to bend. They tossed it in the trash and started over with something else. I don't know if others have had positive experiences or not? |
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5476
1987 Pontiac Formula
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Posted: Tue May 30, 2006 8:01 pm Post subject: |
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| First thing i'd try is moving the fuel pump back to the rear. It'll make a huge difference. |
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