overfueling?
- Thread starter turbodaily
- Start date
turbodaily
New Member
az, never had this prob with my first r and that wasnt running a bov. only seems to do it now and then, im more concerned with the power dropping at 6800rpm, the car just hits a brick wall when it gets to 6.8k. i think its just overfueling as i do get abit of soot when on boost, but at least ive got the scope for more power as im getting a bigger turbo next.
turbodaily
New Member
yeah they were very helpful, il will no doubt go back =)
must just be overfueling i guess... still goes though, had it to 145mph sat night and had more to go (private road!)
must just be overfueling i guess... still goes though, had it to 145mph sat night and had more to go (private road!)
Not sure why it should be overfuelling still ?! Those injectors are fine, they just won't be running as hard as your standard ones would be. The Evo's and GT Fours have 540 cc injectors as standard I believe. If it's mapped correctly, and there's no reason to think it hasn't been, you just have further scope with them, for future mods !
Does the Unichip control the boost as well or, do you have a standalone boost controller ?
Does the Unichip control the boost as well or, do you have a standalone boost controller ?
turbodaily
New Member
boost controlled by the apexi avcr. to be fair though he did run the car up a dozen or so times trying to find out why it was missing at 6k. i think he could have got abit more out of her but i was there for 3 hours and he probably didnt want it to blow up lol
turbodaily
New Member
how do you think it would run if it put the standard injectors back in, with it being mapped on the 550's? and are the evo 3 510 injecters a direct fit? as i have a set of them too.
How many more times can someone say the same thing. The injectors have nothing to do with it. Just because they're rated as bigger, higher flow injectors, doesn't mean they inject/flow more fuel. It just means they can inject/flow more fuel. Forget the injector size, just look at it this way, in the simplest terms. Your current injectors can flow more fuel than the stock injectors, before they max out. That's it, nothing more, nothing less.turbodaily said:
If the car has been mapped with them in, as long as the map is good, the ecu won't be over fuelling the engine.
Putting the old injectors in will just screw up your map, as the ecu's injector duty cycles will be different due to the differences in flow rates of the two sets of injectors.
If the car is still not behaving correctly, take it back to the mapper and explain your issues !
turbodaily
New Member
funny that mate, i had a word with paul at engine advantages and he too suggested it might be a good idea to put the standards back in, which i did this morning and it goes much better, no hesitants between gearchange, and no flat spot at high revs. think il give it a quick run up on the dyno again to check and adjust mapping if it needs it.youngsyp said:
Well, that is odd, and goes against everything I understand about the subject, admittedly that is pretty little though !turbodaily said:
Of course, it could mean that one or more of the 550 injectors wasn't operating correctly ?!
Anyway, glad it's fixed. There's nothing worse than a problem like that, that you just can't put your finger on !
turbodaily
New Member
im not sure myself but im guessing bigger cc injectors will flow more fuel than 444cc injectors at any given revs.
Fusion Ed
Active Member
for a given injector duty yes.
440cc @ for example 100% injector flow would be about 86.3% on 510cc.
If any car was mapped for 510cc's and you put in 440s it would run lean, and as much as the ecu could it would add fuel to the injector base trim (whilst in closed loop anyway), which may make it run ok, however that would only work if the lambda sensor is working correctly. If not it would just run lean all the time.
440cc @ for example 100% injector flow would be about 86.3% on 510cc.
If any car was mapped for 510cc's and you put in 440s it would run lean, and as much as the ecu could it would add fuel to the injector base trim (whilst in closed loop anyway), which may make it run ok, however that would only work if the lambda sensor is working correctly. If not it would just run lean all the time.
turbodaily
New Member
im taking it back to the dyno next week for a quick run,to check fueling.
turbodaily
New Member
just thought i dlet you boys know i took it back to engine advantages with the stock injectors put back in,she nade 339bhp 304ftlb torque on 1.1bar boost, thats more like it!!
turbodaily
New Member
should be considering the engine has only done 4k lol
S
shinny
Guest
i had this problem when i used shit fuel super unleaded try
optimax
optimax
T
turbophillie
Guest
i have same problim wit my car sluggish at about 4rpm then just clears its self out . i chanded plugs ,plug leads , distibitor cap, got better but still not happy let us no how u get on