dangerous brain Posted October 17, 2006 Share Posted October 17, 2006 I just moved into a new house. Well I say a new house but its ages old. I've been marvelling at alot of crap in it. One bit that I took a particular notice in was the central heating thermosatat. I know I know WTF is this guy on about an aging thermostat for Well I've dismantled it in the interest of curiosity. Its a fantastic setup of coiled bimettalic springs and a mercury switch. WOW wee I guess you guys are saying. Thing is it got me thinking a bit. The big assed V8 power houses in the states still use carburettors. Now thats old technology, WHY do they do that??? And heres a thing for the real tuners how would a supra fair with a carb??? Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2006 Share Posted October 17, 2006 Because its cheap and easy. Altho more and more of them BIG v8 power houses are using EFI for more control Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 Because it works..... Link to comment Share on other sites More sharing options...
dangerous brain Posted October 17, 2006 Author Share Posted October 17, 2006 So what in most peoples considered opinions would be the result of using a carburetor on a supra and removing the ECU? Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2006 Share Posted October 17, 2006 Should get you a fair few more Airmiles on your shell card. Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 and the aircon will stop working *grin* Link to comment Share on other sites More sharing options...
SimonB Posted October 17, 2006 Share Posted October 17, 2006 Carbs are inferior in every way to fuel injection. You have all sorts of mechanical bodges with carbs to try and get the fueling and timing right under all conditions and even then it's not very good. Or you just program your ECU to get exactly the right fueling and timing all the time. Plus a turbo car with carbs is complex - you either put the carb before the turbo in which case you can't use an intercooler or a BOV, or after the turbo in which case you have to pressurise the fuel somehow with a special setup. Link to comment Share on other sites More sharing options...
dangerous brain Posted October 17, 2006 Author Share Posted October 17, 2006 and the aircon will stop working *grin* Ah but who needs that when you can use that position to take a buggering great bit supercharger from ??? Is it just fuel consumption would be an issue or are we talking the nasty detonation monster also??? Surely a carb is easier to tweak than a fully fudging fool the ecu piggy back machine?? Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 Carbs also get out of settings over time, which means you are constantly having to reset them. EFI gives absolutely spot on timing as well as feedback to combustion cycle which the ECU uses to tweak fuel injectors. Carbs are set and simply put in what they are set to, which means if they block or you suddenly get a boost spike you will running VERY lean. Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 Hmmm, in the same vein... could you super/turbo charge a throttle body system.. I know there isn't much point because it is positive boost or is there some other reason? Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2006 Share Posted October 17, 2006 Hmmm, in the same vein... could you super/turbo charge a throttle body system.. I know there isn't much point because it is positive boost or is there some other reason? Yes you can. It would be no diferent to the set up on a supra now IE ..you still have an injector for each cylinder only difference would be a TB for each cylinder too. So one big TB for all or one small one for each can be done. Feck setting it up tho. Each TB has to be spot on. Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 Yes you can. Any benefits? Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2006 Share Posted October 17, 2006 Yup, garage gets paid more to fit em Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 Only reason I ask... thinking of sticking baby throttle bodies onto an A-series engine... Link to comment Share on other sites More sharing options...
SimonB Posted October 17, 2006 Share Posted October 17, 2006 Ah but who needs that when you can use that position to take a buggering great bit supercharger from ??? Is it just fuel consumption would be an issue or are we talking the nasty detonation monster also??? Surely a carb is easier to tweak than a fully fudging fool the ecu piggy back machine?? A blow-through carb which you would need for a supercharger or turbo setup would cost you much more than a stand alone ECU I suspect. Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2006 Share Posted October 17, 2006 Depending on what set up you go for they can work very very well . In therory , Take a 2jzgte, six correctly sized TB's would have a greater open orifice than the stock TB and therefore in thoery allow better flow. Now there is also the other side of the coin that says you now have 6 TB plates in the air path. Cost would be a limiting factor hence why toyota use one big TB and it's a hell of a lot easier to set up one TB. Be a good project tho. Track records have shown the work really well on NA aplications. Obviously the Fuel injecting side is still ECU controlled. Edited: K14 sup reminded me. Best of speaking to someone who knows the engine. I'm not familiar with it. Link to comment Share on other sites More sharing options...
Kranz Posted October 17, 2006 Share Posted October 17, 2006 Only reason I ask... thinking of sticking baby throttle bodies onto an A-series engine... If you want to stick multi throttle bodies on an A series talk to KAD. They know it all. They'll also sell you a 16 valve head!! Link to comment Share on other sites More sharing options...
JustGav Posted October 17, 2006 Share Posted October 17, 2006 If you want to stick multi throttle bodies on an A series talk to KAD. They know it all. They'll also sell you a 16 valve head!! I will add this is on a morris minor, and not a mini *grin* But yes, the stuff is interchangable. Link to comment Share on other sites More sharing options...
garethr Posted October 17, 2006 Share Posted October 17, 2006 Apparently the latest mod for the A-series is the 16-valve head off a BMW K-series (bike), and if you want ITBs, get them off a bike as well. Link to comment Share on other sites More sharing options...
imi Posted October 17, 2006 Share Posted October 17, 2006 what on earth is this thread about Link to comment Share on other sites More sharing options...
JustGav Posted October 18, 2006 Share Posted October 18, 2006 Apparently the latest mod for the A-series is the 16-valve head off a BMW K-series (bike), and if you want ITBs, get them off a bike as well. Hmmmm, is this for real?? I'm going to look into this.. could be interesting... Link to comment Share on other sites More sharing options...
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