LPG question

VXL V6 · 08 May 2010, 23:04:15

Purely out of interest, how is the system earthed to stop a static discharge happening?

Is there some earth bonding point on the tank otherwise if the tank is painted / powder coated surely the tank straps/frame/bolts to chassis aren't doing a lot?

Lazydocker · 08 May 2010, 23:11:36

Interesting thought... The frame is bolted through the floor but I've never fitted an earth strap and it's not a requirement in COP 11... Mind you, there's no earth strap on petrol tanks either

Kevin Wood · 08 May 2010, 23:16:25

IIRC, someone told me an earth connection to the tank is a good idea.

The main issue will be between the filler and the nozzle, and that makes electrical contact before any gas can be delivered.

Kevin

VXL V6 · 08 May 2010, 23:16:34

Omega petrol tank has one, but then being plastic I guess it's more suceptable to static.

Just strikes me that there could be a Potential Difference between the tank and the car. :-/

tidla · 08 May 2010, 23:21:16

slightly off topic, these tanks take up a lot of room in the boot. is there any new designs to fit in the almost redundant fuel tank space?

VXL V6 · 08 May 2010, 23:28:24

Quoteslightly off topic, these tanks take up a lot of room in the boot. is there any new designs to fit in the almost redundant fuel tank space?

Only seen torodial tanks that sit in the spare wheel recess as an option to the normal design. I guess (plenty of people will know on here for sure!) that they need to be constructed as a cylinder for the inherent strength in case of an accident.

Lazydocker · 08 May 2010, 23:32:28

Quoteslightly off topic, these tanks take up a lot of room in the boot. is there any new designs to fit in the almost redundant fuel tank space?

If you had a custom made petrol tank then it's perfectly acceptable to mount a tank in that space

tidla · 08 May 2010, 23:32:43

working on trucks i know that the air tanks come in all shapes and sizes, slightly different i know with sender units etc to accomodate. if a tank was designed to fit within the average fuel tank space...

Lazydocker · 08 May 2010, 23:35:47

Quoteworking on trucks i know that the air tanks come in all shapes and sizes, slightly different i know with sender units etc to accomodate. if a tank was designed to fit within the average fuel tank space...

LPG tanks have to be ellipsoidal in shape, ie no sharp edges, much the same as air tanks. There are tanks designed to fit in the space (sort of) vacated by a petrol tank if it were removed... However, the LPG COP 11 states that there must be a minimum 150mm (IIRCC) ground clearance

VXL V6 · 08 May 2010, 23:37:06

Mad Max style!

tidla · 08 May 2010, 23:41:30

how much space/ volume on average would you need for petrol start up/ reserve?

Lazydocker · 08 May 2010, 23:44:29

Quotehow much space/ volume on average would you need for petrol start up/ reserve?

To give you an Idea, I tend to use 3 full tanks of petrol/year

Last filled up on 28th February and got between 1/3 and 1/2 a tank still

tidla · 08 May 2010, 23:56:51

one thing that always put me off was the reduced space and that, at the time the omega was "not a good candidate for lpg due to the plenium chamber design".ps (kit costs)

Lazydocker · 09 May 2010, 00:01:23

Quoteone thing that always put me off was the reduced space and that, at the time the omega was "not a good candidate for lpg due to the plenium chamber design".ps (kit costs)

Must be going back to when it was all single-point/mixer style, which isn't suitable really although I have heard of them running OK (until they go bang!)

Multi-point Sequential Injection systems are fine and work well

The Stag kit a lot of us run comes in at under £700 with a 4-hole cylinder tank in the boot, a little more with toroidal (spare wheel) tank

tidla · 09 May 2010, 00:05:49

thanks for the info

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LPG question