what fuel pressure td04 0.8 bar

[mikey4410]

i have looked for around 30 mins but cant find an answer and its really pissing me of i cant find it as im sure its been covered alot

i have a

sard rrfpr

walbro 255

air fuel gauge to tune ratio

and i cant for the life of me find out what people are running roughly for the above setup

can people please gimme a quick post and say what fuel pressure to run please.

i think its needing to be at 2.5 bar .is that right ??

[Mk3 silver gt]

Stock 2.3, I went with 2.4-2.5bar when I was running a sard fpr and all was well

[5e colin]

just set it to 3 bar first then up your boost to the desired level and keep an eye on the afr readings then start lowering til u find a sweet spot no 2 setups are the same

condition of pump filter injecters al play a role in it

[mikey4410]

colin thats bang on what I thought of doin

I did set it to 3 bar then did few runs etc

long story short its 2.2 bar now and I am getting 11.0 in second and in third I know it will go down even more prob about 10.0 so still needs leaning of a bit but its uber safe.

totally agree about the varients like fuel pump , injectors, fpr etc and mine are all very new and or in good condition.

thanks for rapid replys guys really do appreciate it.

[5e colin]

thats lower then stock fp !!! are u doing this with vac on or off ????

[mikey4410]

yes it is mate

with vacuum feed on.

like I say I am hitting 11 a/f in second gear full throttle

third goes to 10.5 / 10.2.

needs leaning of still a few points

ideally I want 11.5 in second then rest is fine

[triple j]

u could be leaner on spool if u want 11.5 from full boost on is what am at, i think an apexi safc would suit u to lean off things where u want.

Edited March 21, 2014 by triple j

[mikey4410]

or......just adjust my sard rrfpr a knats cock as I have been till its bang on.lol

cheers anyway triple and appreciate ure a/f comment

:-D

[5e colin]

mikey jay is right he aint bashing u mate you could go leaner i am at 11.8 at stages !!!!! but i like pushing things ha ha , 11.5 is a good spot if u where able to go like that al the way tru the rev rave u will have a rocket trust me i put me name on it and i dont do that often !!! ha ha

but thats where it comes really hard to do with just a fcd and rrfpr ita either good off boost or good on boost cant have it both ways with a crude setup

10.5 in 3rd is loosing u lots of power mike !!!! its that gear u want to get spot on thats where most engines are in there sweet spots !!!

anyways mike report back how u get on

[mikey4410]

haha I get ya colin.

I dont wana run a fcd.there awful and I dont agree with them.

I am out tommorow night and will lean it of some more.

cheets again for all inputs . superb shizzle

and yeah will let u know what I get a/fs.

thanks

[EPnick22]

im running 2.6 bar on 315 injectors and hit 11.3 in 2nd and usually 11.6 flat in 3rd and it pulls well, 4th usually runs 11.7-8

[Dean_mc88]

Think this needs to be a sticky or something because its helped me out a lot !! Most solid info I got from this is invest in a wideband

[mikey4410]

a widebabd is an absolute must on a starlet in my opinion.

wouldnt run without one no matter who tuned my car.

fact is I tune my own car.lol

[EPnick22]

i wouldnt have one hadnt mikey stressed to me the importance of it, you cant fine tune if you dont know what its already doing!

[Dean_mc88]

Exactly im running jam ecu, forged engine with hybrid ct9 all supporting mods etc and ill be receiving an rrfpr with my zisco rail. everyone says the ecu should sort the fuelling out but il fine tune that bastard to run better so looks like il be buying a wideband asap !!!

[triple j]

Plug and play ecus don't like fuel pressure other than stock, if u want a proper tune get an e manage or megasquirt

[Dean_mc88]

I know that but with a zisco fuel rail you need an rrfpr , il be setting it at stock pressure at first but I know full well its over fuelling on idle at the minute

[triple j]

Why bother with the zisco rail the look nice but no bhp gains to be got from one, I would paint the stock one

quicker

[Dean_mc88]

im getting the rail lines and rrfpr be going bigger bhp next year hopefully so its just all mods leading to that

[5e colin]

Plug and play ecus don't like fuel pressure other than stock, if u want a proper tune get an e manage or megasquirt

only when u connect a safc or a blue onto a p&p advantage of being able to fit bigger injecters then and make use of the 8k limiter

[triple j]

I think that may define the laws of a plug and play, I wouldn't like to intercept the map signal of a plug and play if the don't even like fuel pressure change also no point piggybacking a emanage off one when u can get a better tune from an e manage and injector control.

[5e colin]

the blue uses its own map senser i dont see a problem with this j same like the pfc fcon doos

you have the base map off the p&p and just alter it with the blue

be just the same as fitting the blue to a stock ecu ???????? just needs a few alterations here and there in the map

[triple j]

Am not sure Colin but the emb must use the cars stock map sensor, it's own map sensor is a 3 bar one that can read in psi and above our stock 2 bar one, it's only used for easier tuning and for boosting above a bar which our stock map sensor only reads a little over a bar and the voltage must be converted to psi/bar, it just tees in beside our stock sensor.

[richardc9052]

The emb uses it's own as Colin said and has an option to clamp the voltage to the ecu of the standard map sensor. I think a p+p and an emb would be interesting

[Dean_mc88]

I think that's what im going to try out that way you keep all the features like 8k rev, speed cut and fuel cut just a more fine tune