i have fitted
surge tank
fuel tank
and im up to running the fuel lines(feed and return)

My questions are....

what size hose do use all recomend for a 1.6twin cam turbo.
(im thinking vl turbo pump)lines to suit...

and 2nd question

where do you guys run fuel lines
inside tunnel(like original)
or
between chassis rail somewhere.....

Another overboard response.

I'm running 3/8" to feed the engine, and 5/16" return.

I'm not sure the final purpose for your car - but I'm running fuel lines inside the cabin (it's a race car only) - saves a lot of bends in the piping.

For the Most conversions 5/16 is a good size to use, a bit bigger if you are wanting to be pulling serious KW's.

where do u draw the line on the definition of serious kw?

Good question mikgan - I know that "Andrew's Coupe" uses 3/8 and that makes pretty good CA18DET power - it think 200+rwkw.

I was planning to use 3/8 - just so I'd never have to upgrade....but I worried when I get to the engine end.

I think the pipes coming out of the fuel rail are 5/16 or even smaller diameter - so I'm not sure yet if I need some sort of reducer pipe or not....

Quote:

damn, just another job to do

Mildman your on fire !! My new fuel line is 3/8 also and runs very similar to the factory lines,(easy to do and bend) im not running massive kw like discussed here (yet) but i thought do it once and the return line will take care of any extra fuel.(better more than not enough) with mine the fuel line runs into a fuel pressure regulator and then out any size i want. So that fixes any reducer probs i might have.
hope that helps mikgan.

So you have a fuel pressure regulator before the fuel rail....is that a CA?

Na Mildman, i must have confused you with my wording. Its nothing that hasnt been done 100 times before, but i though i would help out milkgan. after the lifter, surge tank, efi pump in the back i have the upgraded fuel line all the way to the fuel pressure regulator in the engine bay. Then if required i can reduce the fuel hose/line from the regulator an not have to muck around with extra fittings. its a reducer a pressure regulator in 1.

Just gave me a good idea BigD!

I plan to install the EFI fuel filter in the engine bay, rather than in my metal box...

I might make sure I can reduce it there to whatever the engine fuel rail sizes is.

Thanks for the inspiration!