Ian C Posted December 7, 2004 Share Posted December 7, 2004 The 12v fuel pump mod has a use It really helps the auto shift at WOT with a single turbo. Makes it smoother and minimises the chance of detonation immediately after the gearshift. Gonna hafta rewrite my scathing commentary on it in the FAQ section now -Ian Link to comment Share on other sites More sharing options...
Terminator Posted December 7, 2004 Share Posted December 7, 2004 Ian I hope this is not a dumb question. Would this apply to a Hybrid Turbo car too , as with the 12v mod there is no chance of the pump dropping to a lower pressure momentarily and leaving you lean. Link to comment Share on other sites More sharing options...
paul mac Posted December 7, 2004 Share Posted December 7, 2004 Originally posted by Ian C The 12v fuel pump mod has a use It really helps the auto shift at WOT with a single turbo. Makes it smoother and minimises the chance of detonation immediately after the gearshift. Gonna hafta rewrite my scathing commentary on it in the FAQ section now -Ian most interesting, have you any explanation or theorys as to why, do'es anyone else have any input ? Link to comment Share on other sites More sharing options...
Alex Posted December 7, 2004 Share Posted December 7, 2004 Maintains better pressurisation of the fuel line in that split second when the boost drops off between gears? Link to comment Share on other sites More sharing options...
Matt Harwood Posted December 7, 2004 Share Posted December 7, 2004 Wahoo! My memory worked for once Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2004 Author Share Posted December 7, 2004 Originally posted by Alex Maintains better pressurisation of the fuel line in that split second when the boost drops off between gears? What he said -Ian Link to comment Share on other sites More sharing options...
Dragonball Posted December 7, 2004 Share Posted December 7, 2004 You see I knew it (well not strictly true!) however I did actually invest in several relays to allow anyone to run this mod and switch off the ignition feed to keep it safe! Email me if you need one m8! Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2004 Author Share Posted December 7, 2004 I don't need one, I've got a manual and two bladdy great fuel pumps - pressure is not an issue -Ian Link to comment Share on other sites More sharing options...
dude Posted December 7, 2004 Share Posted December 7, 2004 Have you recovered from the *75 lepton power runs yet Chis !!!!! Dude:flame Dev Link to comment Share on other sites More sharing options...
Guest Usmann A Posted December 7, 2004 Share Posted December 7, 2004 Nice:D Single cars run twin pumps mostly, they should be relayed seperately, use stock trigger wire, that way its all good and safe. Cmon now Mr C, thats not upto your usual tuning theory standards .. Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2004 Author Share Posted December 7, 2004 Twin walbro's off the stock power feed works, although as this thread demonstrates I'm always ready to change my opinions based on evidence:) In fact after what I've seen, two pumps is overkill Wish I hadn't bothered with two, the fuel system was a major pain in the ass to do But we live and learn Dude - yeah, I've recovered, but my stomach is still on the A47 in a layby somewhere heh Anyone who doesn't think an E-Manage can run a single turbo needs to try a properly mapped one, eh Dude? -Ian Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted December 7, 2004 Share Posted December 7, 2004 I'm expecting my emanage to run a single, if not it was a waste of money!! Link to comment Share on other sites More sharing options...
Guest Usmann A Posted December 7, 2004 Share Posted December 7, 2004 Ian, the stock power feed wire, cannot support twin pumps 100%,or when flowing for some serious HP as the wire gauge isnt thick enough, gets too hot, and in some cases can melt the bugger. Yes twin pumps use less current, but pull more Volts. But like you say twin pumps overkill for road car, but Id only advise to run each pump off its own relay, and seperate power supplies. Im not having a dig at your method, alot of people use this, I was too, but all depends on what the goal is. Link to comment Share on other sites More sharing options...
Digsy Posted December 7, 2004 Share Posted December 7, 2004 Originally posted by Usmann A Yes twin pumps use less current, but pull more Volts. Assuming the twin pumps are wired in parallel, they will both draw 12V or whatever the supply voltage is across them. However, assuming they require as much power each as a single pump, they will draw more current down the wire up to the point where the wire splits in two. What is the power rating of the stock pump and the Walboro? Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2004 Author Share Posted December 7, 2004 Two Walbros takes about as much current as one UK spec so I think it's gonna be OK but it's something I'm going to keep an eye on anyway At the first sign of a problem it'll be off to Matt's for the dual wiring -Ian Link to comment Share on other sites More sharing options...
Digsy Posted December 7, 2004 Share Posted December 7, 2004 Originally posted by Ian C Two Walbros takes about as much current as one UK spec so I think it's gonna be OK but it's something I'm going to keep an eye on anyway At the first sign of a problem it'll be off to Matt's for the dual wiring -Ian Bloody hell Ian, that was fast If that is true, then electrically you should be fine. I'll check out the Walboro specs tomorrow when I pop over if you like. Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2004 Author Share Posted December 7, 2004 Actually I wrote it before your post, and was as suprised as you that I'd answered your question before I saw it. Further proof I'm actually :alien: -Ian Link to comment Share on other sites More sharing options...
Guest Usmann A Posted December 7, 2004 Share Posted December 7, 2004 I was just saying, as I thought you had a BL fuel system, which Terry has told me comes with all the relays, and bits and bobs. Ian, I didnt mean it to sound cocky. Link to comment Share on other sites More sharing options...
Miguel Posted December 8, 2004 Share Posted December 8, 2004 Ian are you running a BL fuel system? 1st i knew about it Link to comment Share on other sites More sharing options...
Guest Usmann A Posted December 8, 2004 Share Posted December 8, 2004 Mig, it was my misunderstanding mate, I thought he was. You should know Link to comment Share on other sites More sharing options...
Ian C Posted December 8, 2004 Author Share Posted December 8, 2004 I'm running some fiendish prototype Vortex Power system that Terry and I specced and built from the ground up No worries A, it was a legit technical concern you had and I'm always willing to be brought up on those -Ian Link to comment Share on other sites More sharing options...
Paul Laing Posted December 8, 2004 Share Posted December 8, 2004 Anyone know if this mod would be worthwhile on a UK spec? My car was running just slightly lean around midrange at Thor and they recommended a SAFC or Emanage to sort this out, but would i benefit from this 12v mod instead? Paul Link to comment Share on other sites More sharing options...
eyefi Posted December 8, 2004 Share Posted December 8, 2004 surely the fuel computer should b able to handle this? i wouldn't have thought it would drop to 9v for a few milliseconds just on the gear change. even on the twins, it would be a bit of an oversight by toyota if it did. maybe the fuel computer on that car is not working correctly? Link to comment Share on other sites More sharing options...
eyefi Posted December 8, 2004 Share Posted December 8, 2004 Originally posted by Digsy What is the power rating of the stock pump and the Walboro? the circuit has a 30amp fuse. gss342 @14v - 73psi - 10amps supra uk pump @14v - 73psi - 21amps HTH Link to comment Share on other sites More sharing options...
Alex Posted December 8, 2004 Share Posted December 8, 2004 Originally posted by Paul Laing Anyone know if this mod would be worthwhile on a UK spec? My car was running just slightly lean around midrange at Thor and they recommended a SAFC or Emanage to sort this out, but would i benefit from this 12v mod instead? Paul Yes - of course that's it indeed...you haven't missed the point at all... Link to comment Share on other sites More sharing options...
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