JamieP Posted September 7, 2009 Share Posted September 7, 2009 (edited) Just a thought, i love my race fuel map and wonder if i fitted another tank (dont need to be huge, maybe 2 gallon) in the boot full of race fuel with its own in line 044 pump how could i set it up so at a flick of a switch i could swap what tank im using? The mapping side of things is easy, i already has a switch to change between road fuel and race fuel. I know it could be done if i fitted another fuel rail as ive seen it done but i dont want to go the the expense or agro of doing that. Would a Y piece into my road fuel line work or would the race fuel just go back into my road tank? maybe a one way valve of some sort? I just wanna be ready for if i come across that Veyron again:d Cheers Jamie:) Edited September 11, 2009 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
TLicense Posted September 7, 2009 Share Posted September 7, 2009 (edited) If you had a Y piece before the fuel rail with some kind of valve, you would also need another y piece and valve after it otherwise you be returning the unused fuel from tank B back into tank A. Out of the two options I would probably go for a completely seperate system, otherwise you would also need to wait after switching for the fuel already in the line to be purged out by the race spec fuel. It would be a lot of hassle, but do-able. Edited September 7, 2009 by TLicense (see edit history) Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 7, 2009 Author Share Posted September 7, 2009 Forgot about the return line, yeah another rail seems it might be the only option, its gonna be tight getting another rail in, would it still work ok with the fuel firing in further up the runners? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 7, 2009 Share Posted September 7, 2009 I think NOT having this may be beneficial to the life of your driving licence, personally Quote Link to comment Share on other sites More sharing options...
bignum Posted September 7, 2009 Share Posted September 7, 2009 All sounds too complicated to me, just run race fuel all the time:d ,easy but expensive. Quote Link to comment Share on other sites More sharing options...
adnanshah247 Posted September 7, 2009 Share Posted September 7, 2009 wouldnt weight be an issue? lugging around extra fuel all the time and the way you drive you'll need way more than 2 gallons Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 7, 2009 Author Share Posted September 7, 2009 wouldnt weight be an issue? lugging around extra fuel all the time and the way you drive you'll need way more than 2 gallons 2 gallon would make no difference. Quote Link to comment Share on other sites More sharing options...
adnanshah247 Posted September 7, 2009 Share Posted September 7, 2009 2 gallon would make no difference. hmmmmmmm, i like the smell of race fuel Quote Link to comment Share on other sites More sharing options...
paul mac Posted September 7, 2009 Share Posted September 7, 2009 it would be do-able, on the feed side you would just need a non return valve after each pump but as Tony points out the plumbing headache would be the returns where you would need a solenoid valve in each line that would be activated with the relevant pump, none of the hard plumbing and wiring would be rocket science but the variables again as Tony points out would be how do you know when your running on race fuel and as flow rises in the fuel system what would happen if a slug of normal fuel found its way out of a static leg when your at high boost , i think the only realistic way of doing this would be a seperate system Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 7, 2009 Author Share Posted September 7, 2009 Paul do you think it would matter that the second rail would be putting the fuel in further up the runners? Quote Link to comment Share on other sites More sharing options...
JustGav Posted September 7, 2009 Share Posted September 7, 2009 Have a look at the set up people have used on a twin injector system I'm sure I've seen intake setups with staged injection. The same installation could be used, and it saves re-inventing the wheel. Check to see if the ECU you are using can trigger different pumps depending on map. Quote Link to comment Share on other sites More sharing options...
michel lane Posted September 8, 2009 Share Posted September 8, 2009 your a dad now ...behave !!! Quote Link to comment Share on other sites More sharing options...
csa Posted September 8, 2009 Share Posted September 8, 2009 why go throut the hassle of all this when you can get a big fat NOS system for half the price (of what this is developing into)? Quote Link to comment Share on other sites More sharing options...
paul mac Posted September 8, 2009 Share Posted September 8, 2009 Paul do you think it would matter that the second rail would be putting the fuel in further up the runners? for all out performance mounting them a bit further back really wouldn't be a problem, the reason OEM's mount them so close to the head is usually for emmissions to prevent fuel dropout and the fuel is vapourised hitting the back of the red hot valve, for peak power mounting them further back would help cool the intake tract creating a denser charge, however the distances we are talking about here i think this would be negligible Quote Link to comment Share on other sites More sharing options...
garethr Posted September 8, 2009 Share Posted September 8, 2009 IIRC Jaguars had twin tanks in the early 80s, with a changeover switch on the dash. Perhaps you could use their design as a pattern. Quote Link to comment Share on other sites More sharing options...
dude Posted September 8, 2009 Share Posted September 8, 2009 What happened with the Veyron?????? Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 8, 2009 Author Share Posted September 8, 2009 What happened with the Veyron?????? I lost, there is a thread somewhere but i only left the youtube video up for a little while as it was on public roads. Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 8, 2009 Author Share Posted September 8, 2009 for all out performance mounting them a bit further back really wouldn't be a problem, the reason OEM's mount them so close to the head is usually for emmissions to prevent fuel dropout and the fuel is vapourised hitting the back of the red hot valve, for peak power mounting them further back would help cool the intake tract creating a denser charge, however the distances we are talking about here i think this would be negligible Thanks, im gonna look into doing it over the winter. Quote Link to comment Share on other sites More sharing options...
Fitz Posted September 8, 2009 Share Posted September 8, 2009 ...I'm still waiting for an e-mail of that video Pleeeease Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 8, 2009 Author Share Posted September 8, 2009 You will be waiting a long time. Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted September 8, 2009 Share Posted September 8, 2009 are the uk supras 80liter tank bigger then the jap model Quote Link to comment Share on other sites More sharing options...
Terminator Posted September 9, 2009 Share Posted September 9, 2009 are the uk supras 80liter tank bigger then the jap model Yep JDM around 70 litres. Quote Link to comment Share on other sites More sharing options...
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