460 maxing out

[_GAZ_EP85_]

maybe nick has cracked the tuning game and is making 400bho on a td04

i would say low fuel pressure or that your injectors are not pumping out what there pose to be

 

[KrissyB]

would a stock fuel pump cause this sort of Issue, or a faulty uprated one ?

 

[billybob]

would a stock fuel pump cause this sort of Issue, or a faulty uprated one ?

mybe a fpr also has he got one on the car

 

[HYBRID]

That Kon is a very very valid point repped for that dude , didnt think of that ??

AZE had one big Td05 i dont know what his injector duty cycle was however???

well it depends then again, coz of the ecu he is using, for ex, with the emu on my car & keiths car, with the same turbo, same boost but different gbox/ injectors the timing map remained the same but the injector map was out by a mile in certain places.. from one part number to another injectors vary alot even if they are both 460cc's

i dont know but could it be the way each tuner tunes the cars mybe?

this is true mate, however remember most fuel tuning principals remain the same, ie subjects like a/f target.. its only timing that varies ALOT

base fuel pressure could be set too low i suppose, 460s should be good for a td04 up to its limit( probably blowing hot air past 1.7)

that would be the case on a td4 ted.. but on my greddy td05h-18g the flow map peaks at 2.2bar (by peak i mean optimum performace).. so maybe the injectors are maxing out due to the amount of cfm my turbo pushes at higher pressures?

would the hotter climate have anything to do with it .so if ya get your car tuned in winter you my need a remap in the summer

not really, as if tuned in winter its safe for cold temps, in summer it just dies down a little during normal driving on boost the engine remains virtually the same, maybe AIT increases by a few deg but that shouldnt affect much..

would a stock fuel pump cause this sort of Issue, or a faulty uprated one ?

yes, but for running anything over 330cc's an uprated pump would always help with flow, or there is the possibility of fuel starvation at higher revs witha certian amount of boost..

i would say low fuel pressure or that your injectors are not pumping out what there pose to be

could be, it could also be the regulator or pump is playing up, or that the injectors all though they are 460cc's are not flowing exactly that amount, when i had mine cleaned & tested locally, mine did not flow 460cc but 454cc.. sure a marginal difference but i think u get my point buddy

kon

 

[_GAZ_EP85_]

you would of thought it would have a 255 pump and fpr reg on it if it's getting mapped

so has nick to you to find a set off 550's?

 

[KrissyB]

I know someone if you do need 550's , think GAZ knows the fella too??

 

[ashygt]

thanks for all the help im runnin walboru uprated fuel pump with sard frp.uprated fuel rail. il have a look at the presure tomorrow,nick said its strange because he has 460 and hes running 1.7 bar on a td04.

thank stu

 

[billybob]

ould it be anything to do with HIGH LOW IMPEDANCE INJECTORS

 

[Chris@CCM]

somthing a mis here dude i would get then flow tested , and a fp gauge on there to make sure ur pumps not fucked not the first time a 255lph pump has give up

 

[weakboy2]

starlet ones need to be high imp unless using a standalone with low impedance drivers.

stock fpr should work just fine, thats what i use on mine with no probs at 1.4bar on 550's

i'm actually going back down to 460's and running 1.5bar when i get the car tweaked, no need for 550's on my setup tbh.

 

[ashygt]

il have a look at the pump got these injectors off speedvision but one were faulty so nnick sent them off to get rebuilt so they all flow fine.

stu

 

[Texx]

How does the EMU determine injector duration for a given load and RPM?

Does it use a some kind of independent fuel map or does it read in the stock ECU injector signal, to which it applies a configurable add or trim (% or duration) adjustment to create it's own new calculated injector signal?

Basically what I'm trying to ask is do you tell the EMU how long to fire the injector for or do you tell it how much it needs modify the stock injector signal by to produce the desired results?

 

[KrissyB]

il have a look at the pump got these injectors off speedvision but one were faulty so nnick sent them off to get rebuilt so they all flow fine.

stu

Not the first time they have been faulty

 

[HYBRID]

How does the EMU determine injector duration for a given load and RPM?

Does it use a some kind of independent fuel map or does it read in the stock ECU injector signal, to which it applies a configurable add or trim (% or duration) adjustment to create it's own new calculated injector signal?

Basically what I'm trying to ask is do you tell the EMU how long to fire the injector for or do you tell it how much it needs modify the stock injector signal by to produce the desired results?

the emu modifies the oem signal to create new injector values.

kon

 

[sx_turbo]

i would assume it also depends what fpr you have,

if you have a rising rate regulator, the fuel pressure will be higher and therfore giving you more fuel and lowering the duty cycle.

i personally bought a static regulator with a ratio of 1:1 instead of 1:7

 

[ashygt]

well just took fuel pump out and to my suprise the fuel pump is standard so thats my problem.i bought a walboru one for it when i first put my td04 on,so i asked autofixed to do this for me why there putting the kit on anyway.

so basically they just robbed the walboru pump off me and didnt bother changing them over,should of checked straight away realy because ive had my td04 more than 2 years.

will buy one off nick get it fitted and add somemore boost 1.4-1.5.

thanks stu

 

[sx_turbo]

keep us posted on how you get on

 

[ashygt]

will do mate ordered another fuel pump off nick yesterday so will have to go for a remap in 2 weeks.

stu