Come on dude that’s 600 bhp I run 680 whp on a single 255 Walbro…
Do any of you guys know how long you can hold your foot down with 680 hp ?
Seconds before you run out of road that’s how long and if you are coming from zero experience with a 600 hp Lotus it will be milliseconds before shit happens…and with no airflow around those pumps expect things to happen in the summer…
Oi Oi Pesky … I reckon the bid for the epicentre should be based on quality of curryhouses and availability of decent fuel !!
uk car, no summer socal style 
wowww…nice pumps
Those pumps still need fresh air, tucked under the tank and sealed off from air is not a good thing…Fuel pumps don’t like heat even UK heat…oh well at least mine is getting lots of cool air… :whistle:
We’ve run a similar set up with the pumps for over 4 years without problem. The fuel does make a pretty good cooling medium. And yes, I know it then makes the fuel hotter, but all our temp readings show a tiny amount. 60 litres takes a looooong time to heat up. It then disapates through the entire tank skin back to the air.
Totally agree on the 2 pumps being slightly over kill. However it soon spoils your day when the efficiancy drops off. And as for Walbro pumps, there are so many fakes doing the rounds, you can’t be sure if you’re getting a real one. Even Walbro have a page on their website saying that they can’t tell the difference!! We went through 3 on Sean’s Scooby, one lasted 50 miles, all from reputable suppliers, before using an Aeromotive in tank one. Which has been perfect for the last year
Frank - I’m sure you speak from good experience but do you have any quantitative info about this?
Got to agree with frank entirely.
If you are really concerned fit a warlboro to a swirl port, then run one, possibly two Bosch after that.
You’re neve going need two 044s the roads simply aren’t long enough.
I ran two warlboros as the only pumps in a 600bhp Subaru and that takes much longer to run out of road.
My 700bhp GTR is comparable with two proxy little standard pumps.
It’s a waste of energy to put into the fuel and it’s also damn loud.
Warlboro intank for me!
Agree the roads aren’t long, but Spa/Silverstone/Snett have some pretty long straights - +160mph. Before we did a similar one of another of our customers, we spoke to a number of people, including Bosch about what the best course of action was. In our case Audi engine, +8500 rpm, 1000cc injectors, ability to run 2.2 bar of boost pressure - so 5.2 bar of fuel pressure on a rising rate regulator - 550bhp target, and their opinion was 1 044 was marginal after a couple of hundred hours.
The most frustrating thing about Elise platform cars is lack of space. You very quickly run out of room for all the other bits and pieces you need, so having 2 pumps and plumbing for them out of the way is a massive help.
The other way to look at it is, why run 1 pump absolutly flat out, when splitting the demand between 2 gives everything an easy life and removes alot of the heat generated by running one.
It’s too late so enjoy the money spent… but have a look at my last few videos and take note of the boost guage and see for yourself how long the car is kept at full boost making it’s full 680whp… Show me the guy that will take a street car to it’s limits … Unless you have brass balls that won’t fit in the Exige you won’t be on the loud peddle very long…
Totally agree, for a street driven car, not needed. But is anything more than 300 hp in a Lotus really needed???
But I think you’ve hit the nail on the head - from what Greg has said he wants, and what our customer wants its not meant for the street primarily. From memory the straight at Spa is 1km long, all uphill, with an entry speed of 80 odd mph.
Out of interest, do you know what your fuel pressure is at full boost and revs? Always open to better solutions that are out there.
[quote=frank]It’s too late so enjoy the money spent… but have a look at my last few videos and take note of the boost guage and see for yourself how long the car is kept at full boost making it’s full 680whp… Show me the guy that will take a street car to it’s limits … Unless you have brass balls that won’t fit in the Exige you won’t be on the loud peddle very long…
[/quote]
Really , really, agree 
I run a static fuel pressure of 51 psi. with a rising rate regulator into 1,000cc Denso injectors on 100 octane alone… With the added staged alcohol injection on 91 octane there is less demand since the alcohol injection system has it’s own 255 Walbro pump and regulator flowing a static 47 psi rising rate regulator into 850cc Denso injectors…
Now the cool thing would be to have 1/4 of that tank volume for alcohol but being alloy it’s no good…but you would then have the ability to make some serious real power without theneed for race gas…
You do know that you will never drive this car in the rain without wreckin, so it’s just one of those things you need to remember…
You are putting together a pure purpose built car… This ain’t a Lotus no mo…
Frank - have you checked the flight availability from Bumfuck to the UK, in early April? 
So, max revs, boost and fuel pressure is? On normal fuel that is, can see why you have done the alcohol system, but its not really needed over here as pretty much every petrol station sells 97/98 fuel.
To be honest, whether its wet or dry its not my thing, I can’t keep up with the inputs required, but then again, the car isn’t for me. So far it was totally tractable if you pootled around off boost, but then I guess, whats the point?? Will be interesting to see how well the traction control keeps up when all configured properly.
And forget about wrecking it in the rain, think how much of a mess that it will make just from the water and crap getting everywhere!!! 
Rob the wife is working on things since she wants to vist an old friend in London, so we’ll have to work on it… It’s not gonna rain the whole time we’re there right ?
Max revs 9,200 rpm, boost 36 psi., fuel 87 psi. max… that car with turbo only will be a death trap in the wet, damp, or cold if it makes anything near 600 whp when it hits boost…
Hell we had some early morning fog today and I’m waiting for the roads to dry off and warm up a before I head out…
Great to speak again cuzzin Frank 
Its nearly at 600 hp! Its all about moderation though.
You do know that the throttle goes from 0-100% past every number? Its not either 0 or 100% only?
Will be happy to be the first to buy you a beer at Anglesey! Can do that while everyone else slides about in the torrential, horizontal rain on track!
yeah it never stops raining in the north