Nah, i was just wondering thats all, from discussions with various people there seems to be no point of a bigger throttle body unless the engine and head have been worked. I am alittle embarrassed askin the question actually. A bit of a silly questionIIV8II said:Has a rice racer told you a bigger throttle is bolt-on power?!
Mate no question is silly if you don't know the answer to it. That's why this section was created. I wouldn't know shyte from clay when it comes to mechanical stuff which is why I read more than post in this area. All questions are good questions in here.. just trust me on that!!EF_Falcon_GuY said:I am alittle embarrassed askin the question actually. A bit of a silly question
yeah i got the air scoop of the GT fitted, i must admit i did notice an increase in mid-range pickup nothin else though. I'll have a sticky beek at the latest Street Machine to see that setup. IMO the two runner setup on the EF is better than the EL, as when you measure the pipe from the airbox the EF has a 7cm bigger daimeter piping. Plus for the "ricer appeal" the Twin setup looks better, if it looks better it will go better.IIV8II said:Sneak a peek at KB's workshop in Street Machine this month - there's a pic of a mandrel-bent pipe between the aircleaner an TB which is worth a few kW. Looks like a stock EL piece (not an EF two-runner pipe, if U know wot I mean..) A bigger snorkel (I think an EL GT one goes on - there's been a bit of dicussion here in recent weeks) will stop the airbox sides sucking in at wide-open throttle. The outlet of the aircleaner (top half of the box) I think is a bit smaller than ideal, too - smaller than the TB diameter. There's a few hints anyway.
Thats the EGO sensor, and its used in closed loop mode. when the EEC enters closed loop, it does as you say and the computer aims for the optimum air/fuel mix of 14.63:1 for fuel economy and emissions. the EEC does have a few other modes though.Wulos said:With the EEC4 it has a O2 sensor in the exhaust manifold (used for pollution - or so I believe) If it senses too much O2 in the exhaust it will "richen" the mix a little,too little O2, will lean it off a tad(ie it will improve for the optimum fuel/air mix.)
From what I understand, yes the EEC4 is MAP controlled, but it can be "adapted" to accomodate more performance (a little bit anyway)from bigger TB, Cams etc.
Just to add to that, they run 8 throttle bodies which makes it much harder to run MAF.Mr GTHO said:Yeah, the V8Supercars use MAP for a number of reasons. There is a lot more programming in MAF and that is of all the variables. To run MAF the entire air intake has to be directed through an Mass air sensor and that lessens air flow and those V8's need all the air they can get. You can make more power from MAP than MAF because you are programming for one tune only. The downfalls of MAP is that if you change anything on the engine, ie, ram tubes, cam , injector size, you need to reprogramme. MAF lets you do all these things without the same hassle.
Sometimes when the V8's run in good 'air' they cannot always take advantage of it due that they cannot put the engine on a dyno to tune it to the 'air' at the track.