Lotus Elan and Lotus Elan Plus 2 Forums

In respect of surge tanks/swirl pots in place of doing major surgery on the fuel tank or having Axminster add the functionality, I have decided to go with this:

https://store.034motorsport.com/fully-e ... -pump.html



From a size perspective, it fits below the existing floor of the boot and attaches through the fibreglass.

A fuel pump in a box?

John

If I had my time again, I would have fitted a similar, as John calls it, pump in a box and save the hassle of taking out the tank and especially the problems with the cross brace.

The Bosch 44 pump is right up there with the powerful. I urge you plumb it in with continuous braided teflon and AN fittings! If a push-on fitting were to break loose, it would pretty quickly lower your tank into the wheel well

The question of trumpets is complex. I really do not think the likes of you and I need worry about the effects between 90, 60 or 40mm. Rules of thumb are that longer trumpets are suited to lower speeds and smaller to higher. Then the other rule of thumb - distance from valve ctr to trumpet face is 350mm and with another rule of thumb that valve ctr to butterfly is 200mm (or is it 150mm..?), you can pretty well work out from there what theoretical length trumpet should be used. Emerald recommended 90mm for mine, but it left little space in the airbox for a direct suck so I reduced to 60mm. Another theory is that for optimum trumpet performance, there should be enough air in front of the trumpet to use without forcing air from behind the trumpet faced to be sucked in...

I am no expert but picking these snippets up from my betters - if you want to know all about trumpets, read what Dave Walker has to say - very knowledgeable and very readable:
http://www.emeraldm3d.com/articles/emr- ... th-intake/

A picture showing how neatly the coilpack fits under No1 TB.

I still can't understand why put it in a box..just double wiring and plumbing connections?

as for the coilpack there used to be a dissy on the side of the engine , and now you have a spare space..



John

On the Airbox front.

I went ahead and bought one from EBAY UK from Dave in Goole, it is a consistent 95mm in depth across the length, so for the power that I am running, I think that I am good - other things to worry about!

https://www.ebay.com/itm/Lotus-Elan-2-2 ... 3498603908

Plus I spent 3 years in Hull many years ago, so I am happy to support a Humberside small business. I was going to say Yorkshire but remembered that either Yorkshiremen don't consider Humberside as part of Yorkshire or the other way around - its been a long time! I am sure that someone will set me straight - all I can remember was that sunshine was a rare commodity.

nwbaxter66 wrote:On the Airbox front.



Plus I spent 3 years in Hull many years ago, so I am happy to support a Humberside small business. I was going to say Yorkshire but remembered that either Yorkshiremen don't consider Humberside as part of Yorkshire or the other way around - its been a long time! I am sure that someone will set me straight - all I can remember was that sunshine was a rare commodity.

Yorkshire born Yorkshire bred, strong int arm thik int ed or somat like that
Always was Yorkshire until some twat in London decide to call it umberside
I was born in East Yorkshire and never moved, But my address did twice!! Its now East Yorkshire again

John

Neat coil pack location - Nicely done

Gavin

I received the ebay UK +2 Airbox in the mail today.
Nice looking piece of kit.

The references to the full depth airbox (made by Dave in Goole?) are ebay links that have expired. Can anyone provide a link to the maker himself?

Thanks,
Alan

I will pm you the details tonight
But he is on this forum so will probably contact you directly
N

Thanks!

I haven't heard from the airbox source nor from nwbaxter. I really would like to get one of those. Any reason for his contact information to be private? All I need is an ebay user name.

Thanks,
Alan

Davenmandy0 on eBay.
Dave-m on this site
My message to you with his email got stuck in the Pm outbox, hopefully it will shake itself loose.
I dont think it would be fair for me to post his e-mail on the site.

I ought to get an agents commission on this stuff. But then I would have to respond in a timely fashion!

Correct, thankyou.

Hello Hal

Sorry, but I didn't read thru all those posts and you might have all your questions already answered.
However, below is an older thread describing my conversion. It is a return-less system with fuel pressure regulation, no modifications to the tank, no swirl-pot. There is also a parts-list to give you some ideas...
viewtopic.php?f=31&t=39853

Good Luck, Peter