Bogging at 4000 rpm

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Bogging at 4000 rpm

Post by scimjim » Sat Jan 19, 2019 6:27 pm

Dear god - what a bodge!!!!

Rip the lot out and do it properly :D


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Bogging at 4000 rpm

Post by DARK STAR » Sat Jan 19, 2019 6:34 pm

I'd love to, but what should it look like?


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Bogging at 4000 rpm

Post by scimjim » Sat Jan 19, 2019 6:43 pm

It’s not standard, so it can be whatever you want it to look like - but 6 jubilee clips and random bits of rubber pipe and metal tubes is just asking for trouble :D


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Bogging at 4000 rpm

Post by DARK STAR » Sat Jan 19, 2019 6:54 pm

The tank is standard ...

I suppose I'll just have to take the blue connector off and see if I can get one that fits with a 12 mm (or better still 8 mm) outlet.
Serious perusal of Demon Tweeks catalogue to follow.


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Bogging at 4000 rpm

Post by scimjim » Sat Jan 19, 2019 6:57 pm

If the blue connector has a barbed end under that hose, just fit new 12mm pipe (or whatever size it is), then a single step-down to 8mm which is presumably what the filter is?


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Bogging at 4000 rpm

Post by DARK STAR » Sat Jan 19, 2019 7:09 pm

The first length of pipe is 16 mm, that's the problem (well, one of them).
Yes the filter is 8 mm (Sytech), the original was 12 mm (Ford), the origin of the 16 mm I don't know :roll:
So, is there such a thing as 16 mm petrol pipe ?


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Petrol problems

Post by Motolab » Sat Jan 19, 2019 7:12 pm

DARK STAR wrote:
Sat Jan 19, 2019 5:10 pm
I


Now I am nudged, it seems also that the blue fitting is a hydraulic connection.
Why it was installed in this manner is a mystery.

The upper nut on the hydraulic fitting is 26 mm across flats, the lower one is 24 mm, these are probably not metric
Well, i can think of one reason.....

If it is an unf/unc size thread they might have gone to a Harley Davidson shop, for some parts when they needed some..
I believe they sell these parts for connecting the oil tank to the engine (dry sump engines)


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Bogging at 4000 rpm

Post by scimjim » Sat Jan 19, 2019 7:42 pm

16mm (5/8”) is pretty common in fuel systems. I think the late small sports fuel tank outlet is that size for instance (going to an 8mm fuel pump inlet).


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Bogging at 4000 rpm

Post by efi_sprintgte » Sat Jan 19, 2019 8:28 pm

My XR4x4i had 16mm fuel tank to fuel pump, then 8mm outlet from the fuel pump to the rest of the system.


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Bogging at 4000 rpm

Post by DARK STAR » Sat Jan 19, 2019 9:05 pm

So a 16 mm / 8 mm reducer is a standard item ?
I'll get my Demon Tweeks bible out tomorrow.


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Bogging at 4000 rpm

Post by philhoward » Sat Jan 19, 2019 9:35 pm

M16 thread maybe - but 5/8”/16mm is huge for a fuel outlet? Normally 12mm from a tank to pump?

Just had a google and 16mm is used :shock: - just haven’t come across anything that big myself.


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Bogging at 4000 rpm

Post by scimjim » Sat Jan 19, 2019 10:55 pm

DARK STAR wrote:
Sat Jan 19, 2019 9:05 pm
So a 16 mm / 8 mm reducer is a standard item ?
I'll get my Demon Tweeks bible out tomorrow.
They’re a couple of quid delivered - and nylon, so not affected by ethanol.


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Petrol problems

Post by GavinR » Sun Jan 20, 2019 12:00 am

It's not a hydraulic fitting - its a Goodridge alloy fuel fitting for a push on hose
https://www.advantage-motorsport.co.uk/ ... se+Fitting

Dash 10 JIC would be for a 5/8" hose and the thread is equivalent to 7/8” - 14 UNF


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Petrol problems

Post by DARK STAR » Sun Jan 20, 2019 6:28 am

Thanks Gavin, that gives me something positive to look for.


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Bogging at 4000 rpm

Post by DARK STAR » Mon Jan 21, 2019 6:42 am

Exactly as Gavin said, the blue bit is a dash 10 JIC (why 10 I wonder).
Now, having spent an hour and a half removing the damn thing and another hour perusing the Goodridge catalogue, it appears that connectors of 7/8 inch are only available with 16 mm (5/8 inch) outlet :roll:
At the outlet end of the connector the other 'nut' is smaller but is impossible to unscrew, I have nearly pulled my vice off the bench trying.
So I need to find some 16 mm hose and a 16 / 8 mm adapteur or do it as before with two reducers.
Or perhaps I can screw something else on the fuel tank exit ... I'll see if I can unscrew the remaining 'nut'.

Can I repeat my first appeal, what is the nature of this tank exit, and where can I get 16 mm fuel hose :?:
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