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Author Topic: Fuel line routing  (Read 530 times)
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RebekahsZ
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« on: June 26, 2018, 11:18:35 PM »

I have read the fuel line routing portion of the ECTA rule book, and now I'm trying to thoughtfully apply the rules to my specific car.  I have a 240z which is uni-body.  At the 240z factory, they routed the fuel and brake lines at the top of the transmission tunnel, which while being safe against a speedbump, is not safe against a driveline failure.  So, how to re-route it?  The floor is flat, other than the trans tunnel and I feel like routing the AN10 fuel lines along the flat floorpan leaves them kind of vulnerable to scrapes.  Plus, the new Blytheville track pit area has some terrible high spots in the concrete where a low race car could high-center and trash a fuel line run along the floor.  There really aren't any frame rails on a 240z , although there is a sub-frame with kinda-sorta frame rails that are made out of fairly thin sheetmetal.  For power, I plan to run a 4.8LS GM  V8 engine with a turbo charger (or two) located between the engine and the radiator support. Transmission is a T56 with an Quicktime SFI bellhousing.  Driveshaft has a driveshaft loop.

My plan is to run hard fuel lines along the bottom of the flat floor (pretty much centered between the trans tunnel and the rocker panel) with a short flex line attaching the hard line to the fuel tank/cell.  Then, I'm gonna pass into the engine compartment outside the subframe "frame rail", which thereby routes the fuel line thru the rear of the inner fender (makes the fuel line vulnerable in the event of a front tire failure). 

Then:
Can I locate any fuel line, and/or my pressure regulator, on the firewall (or is the firewall considered to be in-line with the bellhousing), then jump forward with flex line to the fuel rail?

Or:
Do I have to run the fuel line forward along the inner fender (past the hot headers) to the radiator support, then jump across the plane of the hot turbocharger and downpipe, and serpentine belt to the frame rail?

Honestly, it makes the most sense to me to run the fuel line inside the subframe (but outside the trans tunnel), then up the firewall, where the regulator will be located, and to trust the $600 SFI scattershield to do its job of clutch containment to provide fuel line protection. 

Any advice on how to best get an AN10 fuel line from the tank (in the back of the car) to the fuel rail?
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handyguy
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« Reply #1 on: June 27, 2018, 07:41:35 AM »

You can call 520 591 6318 , STEVE , we can talk about what I look for  during inspections concerning fuel lines..
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SPARKY
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« Reply #2 on: June 27, 2018, 09:02:57 AM »

When I inspected I was told if  the fuelline passed by a planetary gear or by the clutch---anything that requires a scatter shield---  put the line inside of a .120 wall tube round or square at least 6" on for at least 6"on either side of the danger zone---This may have changed.
« Last Edit: June 27, 2018, 09:05:07 AM by SPARKY » Logged

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