Lotus Elan

Should I change to ECU & TB, who has done it ?

PostPost by: gav » Thu Dec 08, 2016 10:20 am

Steve

The only difference that I can tell is that the engine runs smoothly up and down the rev range rather than popping coming down the box when driven hard (probably timing)

Mine still sounds great

Cheers
Gavin
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PostPost by: el-saturn » Thu Dec 08, 2016 10:45 am

greg, you can call loads of racing shops, where a swirlpot within a gastank is very common and easy to fabricate! sandy 36/4982 ps: regular foam filled ally tank and a facet pump!
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PostPost by: elanman999 » Thu Dec 08, 2016 1:41 pm

Greg,
Andy Wiltshire does an FI tank. http://axminsterspecialistpanels.com/

I have a swirl pot on the LH corner of the boot. Here's a pic.
I am running 65 section tyres and can just get a spare in.
Cheers
John
img_0953rs.jpg and
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PostPost by: gav » Thu Dec 08, 2016 9:36 pm

John

I think your installation is more efficient than mine.

My high pressure pump is rubber mounted but still manages to make a huge din when it runs.
I havent yet got around to finishing the boot - and am hoping that when done, it will take out some of the noise.

Is yours noisy?

Thanks
Gavin
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PostPost by: elanman999 » Fri Dec 09, 2016 2:15 pm

Gavin,
Yes it is quite noisy. Although over 2K rpm the exhaust wins :lol: . That's why the lift pump is just sat in some foam and the HP pump has some extra foam.
I'm rebuilding the car at the mo and I shall try to isolate the pumps with even more foam. I'm also making a different shaped swirl pot to make more room for the spare wheel.
I do like your fuel tank, does it hold more than standard?

Fuel tack capacity, or lack of it is one reason why I used an external swirl pot and not one in the tank.
Cheers
John
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PostPost by: gav » Fri Dec 09, 2016 9:30 pm

John
I'm running 14" rims and had the tank made to suit the shape - it holds around 81/2 gallons and is foam filled.
The tray that my pump, swirl pot and filter sit on is rubber mounted.I think the problem with my installation is that I used hardline pipe work in the cabin and I suspect it amplifies the pump noise. I plan to replace the hardline with cabin approved goodridge hosing.
On my race car I am going to have an internal swirl pot primarily to save space. Your idea of separating it to increase capacity is a good one but he set up does take space.

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PostPost by: peg_pilot » Sun Dec 25, 2016 11:54 am

Peter,

Regarding your question about returnless fuel systems, this is something I am currently doing. I talked about this a little in my post elsewhere in this section. I have a pressure transducer for the fuel pump outlet and I wrote some software for my ECU to execute a simple proportional-integral control law. This works very well.

Dan
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PostPost by: Quart Meg Miles » Mon Dec 26, 2016 10:39 pm

Back in the 60s Bruce McLaren modified the oil pump system (of his big V8s) to return the relieved oil to the input of the pump rather than dumping it into the sump or tank. Perhaps you can do the same with your petrol pumps and eliminate the swirl pots.
Meg

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PostPost by: Andy8421 » Tue Dec 27, 2016 8:02 am

With reference to the above two posts, it is quite common for diesel engines to return the 'spill back' from the injectors to the suck side of the low pressure pump to avoid having to run two lines to the tank.

Having said that, one of the advantages of having a return flow from the pressure control valve to the fuel tank in a petrol injected system is that it keeps a supply of cool fuel to the under bonnet components avoiding fuel vaporisation and vapour lock.
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PostPost by: pauljones » Tue Mar 14, 2017 5:34 pm

As a further response to the initial question. I have just picked mine up today having had a wide band sender fitted and rolling roaded in Amesbury. Recap is Emerald and Jenvey TBs, short k&n filters. Ignition is a ford gen 2 and Halfords leads controlled by ecu. A front pulley arrangement provides the pickup. It also had an ER40 battery fitted along with positive AND Negative cables fitted.

She nows runs like a dream and started first time on the button. No issues with having to let it warm up, it pulls like a train too. I also now know what the power at the rear wheels is too.

Its a mod I'd highly reccomend,
Kick the tyres and light them fires...!!!!!!!
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PostPost by: dougal9887 » Tue Mar 14, 2017 6:34 pm

20170311_154856.jpg and
Megasquirted GSXR TB's

:)
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PostPost by: pauljones » Sat Mar 18, 2017 11:34 am

20170315_161340.jpg and
Heres mine too.
Kick the tyres and light them fires...!!!!!!!
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PostPost by: john.p.clegg » Sat Mar 18, 2017 12:18 pm

,,and mine

2005_0325efiplenum0001.jpg and


John :wink:
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