Replace 460LPH Walbro with?

[No Crust Racing]

Drilling out what? 

[Dose Pipe Sutututu]

Credit: http://forums.nicoclub.com/rb25-haltech-and-fuel-system-upgrades-t557106.html

A bit extreme, but you get the idea

 

[No Crust Racing]

Thanks,

 

Yeah bit extreme. People making more power than me wit this pump without doing that. 

 

 

[Dose Pipe Sutututu]

22 minutes ago, ActionDan said:

Thanks,

 

Yeah bit extreme. People making more power than me wit this pump without doing that. 

 

Yeah, see if a R33/S14 fuel tank hat/lid is the same size. Use that - easier.

[reaper]

The fuel hat off an s14 fits in there but the plugs are different. Not a problem if you swap to s14 plugs and rewire to suit.

You can modify the stock 34 hat in the same way which is what I have done.

[No Crust Racing]

At what point did it become a restriction? 

Seen plenty of cars with 400-450rwkw that haven't mentioned needing this. 

[reaper]

If you cut one open you'll see its actually quite restrictive at the part where it bends, well less than a -6 fitting.

I have been running a modified hat from 400awkw onwards. It's pretty easy to drill out the standard fittings and use -6 bulk heads which should be plenty enough for you. -8 shouldn't really be needed in this case.

[burn4005]

any issue sealing the bulkhead fittings? the top looks nice and flat but underneath appears to have webbing etc.

I hate the smell of fuel in the car!

[reaper]

Cut the webbing out of the way and smooth it out.A dremel is good for this. Just need to get it to the point that the nylon washer is able to seal properly and you won't have any issues.

Some people have gone to the extent of getting a replacement hat made up out of alloy which is the best way of doing it as you can lay it out exactly as you want

[No Crust Racing]

Are the RB26 fuel lines 5/16" standard? 

I popped that fuel filter in last night and the hoses seemed to go on easy compared to the standard filter Tightened up OK and no leaks while idling, but just surprising.

 

. 

[reaper]

I can't remember off the top of my head but they are a bit smaller than -6 standard

[No Crust Racing]

Everything I read tells me 5/16th for the rubber hoses and a touch smaller for the hard lines. 

[burn4005]

im interested in milling off the supply hose and fitting a sharp 90 degree bulkhead fitting to minimise losses around that bend, and also be able to upgrade to -6 ot -8 in the future.

I'm using a pwm fuel pump controller so i'm not worried about the return line or jet pump line sizes.

would a -8 90 degree bulkhead fit under the pump cover or would I need to go a -6?

one of these:

or these: (worried about clearance due to radius)

Edited June 13, 2017 by burn4005