Trevor,
Thanks for that. I am not sure whether the fuel bowl is running out beacuse the pump
can't keep up or there is a restriction in the fuel line. The car sat on a farm in
Warragul for 3 years. I am guessing that all the crud in the tank has settled. I
will put some new fuel line of a wider diameter. I car currently runs a Bluebird
electric fuel pump. I have another so I am going to try and run them in series (ie
near fuel tank and in engine bay) in the short term and see if that makes a
difference. The car is OK after a few seconds on none WOT operation.
See you at Sandown.
Cheers
--- "Pooley, Trevor" <[EMAIL PROTECTED]>
> wrote:
>Michael,
>
>I have been going through this all year. Big summary of what I have found.
>1600 fuel lines and mechanical pump are not up to performance L series
>applications. Particularly in constant WOT situations of a long duration.
>Big broad ballsy statement I know.
>
>I have found in worsening order su's, single 45mm webber and twin 45mm
>webber in the above mention application to all have fuel supply problems,
>particularly in 3rd, 4th and 5th gears. What tends to happen is you run the
>fuel bowl dry faster than the pump can fill it.
>
>Summay for carb type.
>su: would run out in 4th an fifth on the straight at sandown with std fuel
>lines mech pump, STD L18 and extracters.
>single 45 webber would run out of fuel at around 4500-5000rpm in 3,4,5th
>gear at Phillip island . Again std fuel lines, mech pump, STD L18,
>extracters. Note this did not show up in testing on the street, only on the
>track.
>single 45 webber would run out of fuel at around 5000-5500rpm in 3,4,5th
>gear at Sandown. Again std fuel lines, facet electric fuel pump, STD L20B,
>extracters.
>Twin 45 webbers at calder, 3/8 fuel line from the tank (run underneath the
>car), new electric fuel pump, STD L20B, extracters. Problem fixed.
>Now at winton short track Twin 45 webbers, 3/8 fuel line from the tank, new
>electric fuel pump, STD L20B, 76 deg Cam, extracters. No fuel probs but
>didn't get to use 4,5th gear to really test the car.
>
>Other suggestions make sure fuel tank has a vent system hooked up so tank
>isn't under vaccum as you pump out the fuel.
>Test fuel system using a 1 litre container and disconnect fuel line at carb,
>turn pump on and dispense fuel into container. If you can pump around 1
>litre a min you should be ok. You can also do this before and after filters
>etc to find restrictions in the system. If problem persists check needle and
>seat in carb.
>
>Guide to fuel useage at winton 50 laps was equivalent to full tank + 5
>litres say 35Litres. Assuming average lap time 82sec then 50 x 82 =4100sec
>then for minutes 68.3minutes of fuel. So for litres per min at winton 0.51
>litres/min. I am expecting higher at other tracks where I will be on cam
>(read higher revs) more.
>
>If you want a look at what I've done then come down to sandown on the 29/30
>of July.
>
>Regards
>Trev
>
>
>
>Date: Tue, 11 Jul 2000 10:26:10 +1000
>From: "Errol Smith" <[EMAIL PROTECTED]>
>----------------------------------------
>Michael,
>Ask Trevor Pooley about the difference fuel line sizes can make to
>performance.
>Cheers
>Feral Errol
>
>----------
>From: Michael Foreshew <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Fuel Line and Tank
>Date: Tuesday, July 11, 2000 9:00
>
>Just put the SU's on the rally car and took it for a spin. Good
>improvement. Then put ram tubes and better air filters on and
>#$%$#$#%^#@%. Great improvment.
>
>The one problem I have is that it is running out of fuel. I was going to
>replace the fuel line and locate inside the transmission tunnel so that it
>doesn't get ripped off by rocks and stuff. The question is does anybody
>have recommendations of where I could get get this pipe made up?
>
>The other questions is there is probably some crap in the tank preventing
>full fuel flow Any advice on th4e best way/place to get these cleaned out?
>
>Cheers
>
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