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Post by casesensitive on Jun 23, 2017 13:08:31 GMT
80 miles between fill ups and about £20 spent each time. Gauge reads 76% when full and stays there for 20 miles before falling all too quickly to 30% where it can happily fluctuate between 5 & 30% depending on how I'm driving. My bottle goes when it starts showing 15% as I have no idea how much is really there ! First thing is to make sure your float goes all the way to the bottom, and all the way to the top of the tank (30cm in a Rocket). I used a coat hanger and some copper wire, shrinkwrapped.  I bought the Spyda fuel gauge wizard at Stoneleigh; start from empty, you can calibrate the tank at discreet markers by putting in a known amount of fuel. So, get 20L of fuel, split it into 4/5 L jerrycans, and calibrate at 0, .25, .5, .75 and full. Works for weird-shaped tanks. |
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Post by carlyd on Jun 23, 2017 15:25:28 GMT
Doesn't the focus pump sit on the bottom of the tank then? if it does the float should reach the bottom as standard. I don't know about the focus pump as I used the Honda one which is the perfect size for the rocket tank. It mounts to the top but is spring loaded so you can adjust the height. Mine sits on the bottom of the tank so no need to extend the float. I believe it has more throughput than the focus pump too so better for more power :-)
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Post by martinw on Jun 23, 2017 15:53:14 GMT
Mine sits on the bottom of the tank so no need to extend the float. Yes, it sits on the bottom, but the arm only moves through a limited angle. The extra height of the MEV tank means that the arm will be fully up (so showing a full tank) when the fuel level is only half way up the tank. You'll only see any reduction on the fuel level once the arm starts moving down - once fuel level drops below half. If you can live with that, then fine. Ideally, when you extend the arm, you allow the float to register movement right from a full tank down to empty.  Martin |
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Post by casesensitive on Jun 23, 2017 16:27:13 GMT
Yes, it sits on the bottom, but the arm only moves through a limited angle. The extra height of the MEV tank means that the arm will be fully up (so showing a full tank) when the fuel level is only half way up the tank. You'll only see any reduction on the fuel level once the arm starts moving down - once fuel level drops below half. If you can live with that, then fine. Ideally, when you extend the arm, you allow the float to register movement right from a full tank down to empty. Martin Yep, it goes to the bottom both in the Focus and on the Rocket, but the Focus tank is maybe 12-14cm tall, the Rocket one is twice that. So, in use, you'd be showing 100% full from 20L all the way to, say 10L left, then it'd drop quickly. The get the float to go from the bottom of the Rocket tank to very top, you have to bend and extend it. If you want to take account for the not-rectangular-cuboid shape of the Rocket tank (it tapers from bottom to top), you need the Spyda gizmo, essentially, you calibrate your fuel gauge from 0 - 10 points on one side of the device, and on the other, you calibrate what resistance the input side needs to submit to correspond to this. So if your resistance on the sender goes from low to high, but your gauge is designed for high to low, it'll sort you. Or if it's not a straight-line relationship etc. |
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Post by robin on Jun 23, 2017 16:31:47 GMT
many , many thanks for all the answers , indicators doe and look superb, horn next and then fuel sender
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Post by nigel on Jun 23, 2017 17:51:43 GMT
many , many thanks for all the answers , indicators doe and look superb, horn next and then fuel sender just a thought, have you read the following thread in the Tech Section? ( link) If you have, just ignore my question.  nigel |
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Post by robin on Jun 23, 2017 22:36:31 GMT
many , many thanks for all the answers , indicators doe and look superb, horn next and then fuel sender just a thought, have you read the following thread in the Tech Section? ( link) If you have, just ignore my question. nigel just had a flick through it and lots of views, once tank cover off i can see what scott has done on this as cant find it on his build thread , am thinking quite simple fix once apart , but i could be wrong  ? thank you |
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Post by nigel on Jun 24, 2017 4:51:23 GMT
Scott was/is a very competent builder, and therefore I’m sure that all will be as it should be. Personally, I had the opportunity due to a pump failure, to revisit my own fuel pump tank assembly installation after initial build and I’m happy to help in any way I can should you have any questions or concerns. Below is a picture of my completed assembly prior to tank installation. (click on picture for enlargement)  nigel
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Post by robin on Jun 24, 2017 17:58:28 GMT
Scott was/is a very competent builder, and therefore I’m sure that all will be as it should be. Personally, I had the opportunity due to a pump failure, to revisit my own fuel pump tank assembly installation after initial build and I’m happy to help in any way I can should you have any questions or concerns. Below is a picture of my completed assembly prior to tank installation. (click on picture for enlargement) nigel many thanks for this , is assembly in tank ? |
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Post by mawdo81 on Jun 24, 2017 20:14:09 GMT
Yes
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Post by robin on Jun 24, 2017 22:42:56 GMT
i guess i have lots to learn didnt have this with marinas or mk 1 escorts , lol |
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Post by martinw on Jun 24, 2017 23:01:37 GMT
i guess i have lots to learn didnt have this with marinas or mk 1 escorts , lol Don't worry - we never (hopefully!) stop learning . We've just been there before you, and you missed our (earlier...!) learning phase  . Martin |
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Post by mawdo81 on Jun 25, 2017 7:43:42 GMT
Injection engines need higher pressure fuel lines. Ford decided to package the pump in the tank, presumably, for space/packaging reasons and the fuel helps keep the pump cool. Also I'd have thought there to be less risk of cavitation/air getting in the lines. Stiggy normally tries to re use as much donor as practical in his designs without compromising the philosophy of the project, hence re using FORD's approach rather than an aftermarket external pump (which would also be much more expensive). |
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Post by daronbeacroft on Sept 10, 2020 18:31:58 GMT
1st disaster , dont trust fuel gauge , can any one tell me how big is a standard mev rocket fuel tank spluttered home on fumes and then put about 15 litres in to fill it Can anybody please confirm to me if the standard square - fuel tank purchased with the Rocket is Dual - Lined or not please? My IVA Examiner has asked the question? Many Thanks |
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Post by kiwicanfly on Sept 11, 2020 10:34:23 GMT
The standard tank is a simple aluminium box, I have a picture of one cut open if it's of use.
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