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Simmo999
CA18det help needed
#1
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hey guys,
just wondering what size fuel lines most people are running? 5/16 or 3/8?
Cheers in advance

Posted on: 2009/4/15 10:18
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CA18DET 1200 ute 165hp (stock CA)
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hotrocket
Re: CA18det help needed
#2
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im using 8mm alloy on my ca conversion

Posted on: 2009/4/15 10:35

Edited by hotrocket on 2009/4/15 21:47:43
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old_school
Re: CA18det help needed
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Im using 5/16 on my coupe with a stock CA18DET. I have a Goss motorsport fuel pump and have had no issues with 5/16 fuel lines.

Unless you are going to be chasing huge Hp the 5/16 lines would be adequate.

Dont know where you are located but in WA Fuel lines under the car have to be steel bundy tube.

5/16 - 7.9 mm
3/8 - 9.52 mm

I used the original 1/4 line as purge to the charcoal canister

Posted on: 2009/4/15 11:05

Edited by old_school on 2009/4/15 12:48:54
Edited by old_school on 2009/4/15 12:50:40
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Mildman
Re: CA18det help needed
#4
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5/16 feed, and the original 1200 fuel line as the return - pretty stock motor....yet to be tested.

Could find anywhere to buy 3/8 bundy tube in SE Melb!

But I think even 5/16 on a 044 Bosch pump will be double what I actually need.

Posted on: 2009/4/15 11:32
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matty
Re: CA18det help needed
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I'm using 5/16 without drama on a mildly modified CA putting out just over 160rwkw.

Posted on: 2009/4/15 22:25
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1985 CA18DET Datsun 1200 ute
1969 A12 Datsun 1000 coupe
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Simmo999
Re: CA18det help needed
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cheers guys, also another thing with regards to fuel. Im thinkin about running a surge tank with a facet to supply the surge tank and a bosh 044 to supply the motor! is this sufficient?

Posted on: 2009/4/16 10:43
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dattodude
Re: CA18det help needed
#7
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044 might be a big noisy. That's the biggest problem.
A small facet should be fine (edit: for a lift pump). 90% of your fuel will come from the return line under most conditions if the return line is correctly plumbed to the surge tank. STandard EFI diameter Bundy tube is fine. 3/8 is overkill on everything except a turbo rotary.

Hey Hotrocket, please check with engineer about the alloy fuel line when running EFI pressures.
I think I remember hearing it's not legal. I know it's easier to fit bend and fit though ..

Posted on: 2009/4/16 11:12

Edited by dattodude on 2009/4/16 11:35:47
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matty
Re: CA18det help needed
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Sufficient for what mate?

Until you provide an idea of the power level you are chasing our answers will be nothing more than guesswork.

What I can tell you is that the Bosch 040 intank pump I am running in the factory mounting position of my R31 tank will comfortably support 180rwkw.

Hope this helps.
Matty

Posted on: 2009/4/16 11:13
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1969 A12 Datsun 1000 coupe
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matty
Re: CA18det help needed
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For what it's worth 170rwkw is quite achievable on a standard motor with a 200SX T28, chipped ECU, exhaust and 18psi.

This figure obviously depends on the condition of the motor, quality of modifications and how happy the dyno is.

Posted on: 2009/4/16 11:25
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hotrocket
Re: CA18det help needed
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yep thanks dattdude checked out all good

Posted on: 2009/4/16 12:00
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