ST170 Dan Posted June 28, 2007 Share Posted June 28, 2007 sum1 tell me somethin about efi injection. wot does efi stand for and how does it compare to the injection on 1.8 zetec engines? Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 EFI = Electronic Fuel Injection. All zetecs are EFI. Link to comment Share on other sites More sharing options...
ST170 Dan Posted June 28, 2007 Author Share Posted June 28, 2007 ok, u know on sum engines u have the big efi unit? mine dont have that. wots goin on there then? if all zetecs are efi. Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 It's not an "EFI Unit". There's no such thing. They just chose to stamp the letters "EFI" on the aluminium manifold. Link to comment Share on other sites More sharing options...
ST170 Dan Posted June 28, 2007 Author Share Posted June 28, 2007 oh ok. i did wonder. cheers. Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted June 28, 2007 Share Posted June 28, 2007 thats just the inlet fannymould, on later scorts they are different. according to the owners manual for my old scort zetecs are actually sefi (sequential electronic fuel injection) as opposed to the cvh being just efi...... but anyway..... later zetecs have a plastic inlet manifold with the throttle body vertical at the back of the engine as opposed to the earlier ones with the horizontal throttle body on top of the cam cover Link to comment Share on other sites More sharing options...
Tez162003 Posted June 28, 2007 Share Posted June 28, 2007 (edited) whats the difference with the inlet manifold that goes over the top of the engine, the one with efi on it, and the one that is behind the engine and doesnt go over the rocker cover? sorry for the poor explaining! okay you sort just answered my question but is there any performance difference between the 2? Edited June 28, 2007 by Tez162003 Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 CVH's are batch-fire, not sequential... But he was asking about Zetecs. All Zetec engines are fully sequential EFI.whats the difference with the inlet manifold that goes over the top of the engine, the one with efi on it, and the one that is behind the engine and doesnt go over the rocker cover? sorry for the poor explaining! The later plastic one is a better design and cheaper to make. Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted June 28, 2007 Share Posted June 28, 2007 and easier to get a 2 litre throttle body to fit!! Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 Not that a 2 litre throttle body gives you any more power. Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted June 28, 2007 Share Posted June 28, 2007 it allows more potential for power in theory as it is the same size as the rs1800 although it is still restricted by the standard inlet and obviously air/fuel ratio amonst other things like the induction, cylinder head and exhaust etc Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 roger, the reason the 130 and 136 PS engines had larger throttle bodies is not because the 90-115 PS ones are a restriction... It's to do with throttle response and what the marketing team wanted. Link to comment Share on other sites More sharing options...
Kapthowdy Posted June 28, 2007 Share Posted June 28, 2007 Usually you only bump you throttle body and MAF when you have other supporting mods to warrent the increase in size. You can actually hurt performance by decreasing velocity in favor of volume. One of my cars has a 60mm tb from the factory and was increased to 75mm only with bigger injectors, heads, intake manifold, and forced induction. The 60mm supports up to about 350-380hp. Im in the 600hp range now to give you an idea of what TB bore size can do for you, but only with supporting mods. Yalls cars are the same on a smaller scale. Lots of kids get a big TB with stock heads, cams, and induction here, and are only wasting their money. Anybody running power-adders on their Escorts? Seems like turboswould be popular. Are there any emmissions or inspections in the UK? If so what is the interval between inspection? Link to comment Share on other sites More sharing options...
Stu Posted June 28, 2007 Share Posted June 28, 2007 Kapthowdy- We have annual tests called MOT tests (Ministry of Transport). Cars (well, engines) from 1992 require cats, prior does not. The annual test includes an emissions test. Don't worry, our 'boy racers' are exactly the same as your 'ricers' Link to comment Share on other sites More sharing options...
ryan_gwa Posted June 28, 2007 Share Posted June 28, 2007 Apparantly, the aluminium manifold and plastic version have slightly different looms? Obviously the ones that got toward your throttle body, IAT etc etc. I havent fitted an aluminium manifold yet, so im not sure on the difference. Link to comment Share on other sites More sharing options...
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