Fuel tank hose mod

Fuel tank hose mod

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Discussion

Griffer

Original Poster:

267 posts

281 months

Thursday 26th June 2014
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I've had the fuel tank out from my early precat to fit the fuel rail bridge as fitted to later Griffs. This is the brass up and over pipe to help with clearance of the lower wishbone, fitted between tank and pump.
The original 22 year old piece of hose looked like machine hydraulic hose, with a steel braid between the cores, the outer core had split down to the braid in the area between boot exit and wishbone but had not leaked. All replacement pipe I could find was of normal 2 core construction so due to the close proximity of the wishbone thought I'd try the bridge piece. In situ the bridge does not straddle the wishbone centrally, it is off centre to the front of the car but still gives about 12mm clearance with the suspension loaded, I dont know if the later cars exhibit this or if the tank stub is shorter or in a slightly different position but at least there is now some clearance so will see how it goes, only downside is that there are now 4 clip points instead of 2 on this short pipe run and you have to watch the handbrake cable position, I think they are dressed slightly differently on later cars.
Steve

Edited by Griffer on Thursday 26th June 12:16

Barreti

6,680 posts

236 months

Thursday 26th June 2014
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I know that piece of crappy pipe very well and replaced mine about 18 months ago. Scary looking bit of rusty crap when it gets to the state yours was eh Steve.

I knew about the bridge piece on later cars - I had a photo of one pinned to the garage wall for months to remind me - but couldn't find a way of reproducing it. In the end I went for the armoured approach and put the hose through a piece of 22mm copper pipe I bent to form an arch. I used a longer bit of hose and cable tied it up out of the way so I have plenty of gap above the wishbone and chamfered both ends of the copper pipe so it couldnt damage the fuel hose.

So far so good, though I haven't had a good look at it recently to see if there are any witness marks where contact has been made.

I was a bit fixated on what later cars had as a solution to getting the fuel hose over the wishbone safely but only found cars with the bridge and a crappy bit of rubber stuck to the wishbone with great gobs of silicone so if they did touch if would be rubber to rubber rather than steel wishbone to rubber hose.


Edited by Barreti on Thursday 26th June 14:41

SILICONEKID345HP

14,997 posts

230 months

Friday 27th June 2014
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Did you weld a new nipple on the petrol tank ? I can`t believe TVR did that ,its not even ribbed .

Barreti

6,680 posts

236 months

Friday 27th June 2014
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Steve, I was under the Griff today while it was having the tracking done so took the opportunity to get a photo of my mod with my phone.
If you want the pic drop me an email.

IanB

Hoover.

5,988 posts

241 months

Friday 27th June 2014
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Just had my hoses sorted to my fuel tank, as it was imploding...... new pipes and a "roll over" (what ever that is

Griffer

Original Poster:

267 posts

281 months

Friday 27th June 2014
quotequote all
Daz, no did'nt change the nipple, I worried about unscrewing the big nut and then getting a leak from there, that unribbed stub is poor though, if I ever take it out again I may do something about it, if it was a tad shorter I may have got the bridge piece to line up a bit better relative to the wishbone. I would have made a bridge pipe up myself if I had access to the flare tool, the bridge was only £6.95 but postage was the same again plus VAT for a bent piece of pipe.

Hoover, the roll over must be the valve unit behind the tank which sits in the vent pipe between filler neck and wheel arch, you should be able to suck/blow through it with the car the right way up! Closes to prevent fuel spill if you invert I suppose.

SILICONEKID345HP

14,997 posts

230 months

Friday 27th June 2014
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Even with the jubilee clip tight the hose still could be moved ,that hose connection on the tank is pants .

V8Andys mod .




gavgavgav

1,551 posts

228 months

Saturday 28th June 2014
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Hoover. said:
Just had my hoses sorted to my fuel tank, as it was imploding...... new pipes and a "roll over" (what ever that is
The roll over is a valve that stops fuel from going down the tank venting when the car is upside down. It's a simple valve that is hidden behind the tank.

Hoover.

5,988 posts

241 months

Saturday 28th June 2014
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gavgavgav said:
Hoover. said:
Just had my hoses sorted to my fuel tank, as it was imploding...... new pipes and a "roll over" (what ever that is
The roll over is a valve that stops fuel from going down the tank venting when the car is upside down. It's a simple valve that is hidden behind the tank.
apparently my car wasn't fitted with one, so garage put one in for me......

hansdaal

266 posts

266 months

Sunday 29th June 2014
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Hallo,

Are there any more pics of Andy fuel tank mods.
If so would be interested. Can send to hamada@planet.nl

Thanks Hans.

PeteGriff

1,262 posts

156 months

Friday 29th August 2014
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SILICONEKID345HP said:
Even with the jubilee clip tight the hose still could be moved ,that hose connection on the tank is pants .

V8Andys mod .



Hi SK, did you cut the nice access hole in the bottom of the boot? If so how do you refit the 'plug' as such?

Many thanks, Pete