how much boost can you run on yellow injectors, only just bought my 2wd and ive been told 18psi is too much

my cars got uprated actuator and a chip, seems to run fine without pinking.

am i about to go bang?? wot do you all suggest?

(whats the most anyone has run on yellows, boost/bhp??)

cheers people

 

18psi is fine on yellow, with clever mapping you car run 20+psi but your safe with your 18psi for now

 

cheers

so is an intercooler the next step? or shal i wait til i get injectors and map sensor?

what does everyone predict my power would be...

standard turbo/ engine/ intercooler
actuator
filter/ exhaust
chip
18psi

260 sound ok?

should find out next week when it goes on rollers


cheers

 

about 260 ish, intercooler would be the next sensible step

 

HI,

If i was you i would turn it down to 15psi, as the duty cycle (pulse width)opening time of the injector is probably not safe at 18psi, past it s limit of fuelling at top revs flat out, check with the company who supplied the chip, also check most well known tuners such as MAD,stage one using yellows 15psi, to expensive to take a chance;
Dave,

 

yah I agree with davidreader5, although Im not an expert, I personally would turn it down, maybe get some greens and a chip (speak to karl norris) he tuned my RS500 to a proven 371 BHP, on standard compression, 25psi, greys, BD10's, verniers,chip, and I had MOT yesterday and CO reading on greys was 2% ! now thats fookin good!


cheers to Hulland Ward Garage, Derbyshire, ( saph cossie owner) for the extra care taken!


cossyman

 

Should have said dependant on chip obviously , i have just done a stage 3 conversion on a saph and it was happily running 18psi on yellows when it was stage 1 and the fuelling and injector duration were fine

 

stage 3 at 18 psi, thought that was about stage 1, I had stage 3 escort cossie and that was about 360 bhp!
methinks


cossyman

 

Sorry mate, i worded it badly so have edited it

 

HI carl,

I8PSI, can't be right on stage one regardless of chip as only
actuator change and chip, for 15psi, as std map sensor 2bar,
what map sensor are you using , why not go to stage 3, 803 green injectors,
3,bar map, chip, and should also change fuel pump, but some tuners dont,
use decent, pref hybrid turbo 25psi,peak.grpa, headgasket and build from there,unless engine in poor condition,

Dave.

 

you certainly dont need to change the fuel pump for a stg 3 mate.

 

HI.

AS I SAID some tuners dont, but escort cosworth 100% needed,and
personally some stage 3, is 290/300,bhp mine is310/320+,as some class as stage
4,and recommend uprated pump,

Dave,

 

Hi

had small turbo Escort cossie converted to large turbo and that needed uprated pump, but then bought RS500 with stage 3 (greens,3 bar, etc) and the fuel pump had not been changed, now greys,BD10's, etc, and fuel pump defo changed

 

SO WHAT HORSPOWER SHOULD I GET OUT OF A RS 500 WITH A STAGE 1 COLLINS CHIP AND WHAT MPG SHOULD I BE GETTIN I PUT 18 QUID IN AND GOT 80 MILES BUT I HAVE CLEANED THE VALVE THAT CONTROLS TIKOVER NOW IT RUNS BETTER

 

I agree that a pump change is required on the escos but no way on anything else, the standard pump can supply fuel for nearly 400bhp, to me stage 3 is 310-330

 

hi


well mine at 25psi boost on grey injectors and is a proven 371BHP on STD compression and I reckon im getting 12 -16 MPG roughly


cossyman

 

You can expect 250-270 hp depending on chip & upgrades on yellows at 15-18psi, however, Karl Norris has a chip that goes to 22+psi on yellows using a special map that does appx 300hp. He calls it the Stg 1 Plus. Check his website for more info. He has a good reputation on here!

 

just had my rwd drive saph rolling roaded on sat! was boosting 17 psi fine on the the rollers which produced 285 bhp@ the flywheel and 237@ the wheels! on the road its peaking 20 and holding 19psi due to better air flow as it only had little fans on the rollers! the mixture has been checked twice and theres is no pinking,i'm very impressed by the difference a set up can make! as all the previouse owner had done was thro in a chip a whack the boost up!

 

That's dangerous unless you know you're not going lean over 16 psi. What chip pray tell?

 

My car is a stage 1 by Karl Norris

It spikes 26-27psi and drops to 23-24psi held up to 7000rpm,it then drops to 15psi.

This has been done by Karl and was proven to be safe during many top speed runs of 150+mph at bruntingthorpe proving ground for a Performance Ford shoot.
The fueling is perfect through the whole range.

It is all in the mapping of the chip,but this is not a run of the mill Chip by anymeans

Car is running the following
Standard Yellow Injectors
Standard 2Bar MAP sensor
Standard T3 Turbo
-31 actuator
Forge RS500 Intercooler
Karl Norris Custom "Gunship" Stage 1 Chip

 

Tiff, how do you set the actuator then? As you know i'm in America, so i'll have to order the chip, rather than have it by his shop, like

 

I leave all that to Karl mate

You will have to e-mail him and get him to run it through with you

 

Fair dues Tiff my son!