fitment of p2 and boost settings

dearing5 · 30-09-2008, 15:13

hi chaps, done a search but couldn't find enough info on phase 2...

1. easy enough to fit? whats involved..

2. what boost can i run?

3. fuel pressure?

thank you

**Orange Peel** · 30-09-2008, 15:20

1. I think there's a guide on here somewhere.

2. Depends on what other components you have. FMIC, Injectors etc.

3. What injectors do you have?

dearing5 · 30-09-2008, 15:27

your always the first one to reply for me... ha thanks mate!

i got a fairly big front mount (2.5" pipework), standard injectors, walbro pump, cossie 2wd FPR, cossie -31 actuator.

**Orange Peel** · 30-09-2008, 15:51

Right standard injectors need a fair amount of pressure. Do you have a gauge and also do you have a wideband kit? Without knowing the a/f ratio I wouldnt want to push P2 spec's on standard injectors.

I'm not 100% sure but I think you want 4.5Bar on standard injectors. Please confirm this before you tweak the boost

Its only really your injectors that let you done. Everything else is fine for P2

buzball · 30-09-2008, 16:13

Im pritty sure standard injectors on phase 2 is 3.5 bar

vxlgsi · 30-09-2008, 16:22

i was also told 3.5 bar on yellows but to be honest every engine is different and getting it set up on the road with a wideband or on a rolling road would be best.

Gareth Colley · 30-09-2008, 16:44

3.5bar for phase 2. I have some saab reds for £40 delivered if you want them? Really good for phase 2 especially if you have adjustable reg. Standard injectors will be getting close to maximum flow on phase 2.

buzball · 30-09-2008, 16:55

What do saab reds run on evo 5

vxlgsi · 30-09-2008, 17:45

£40 is cheap buy em.

buzball · 30-09-2008, 17:51

Yeh i no thats cheap lol ive already got some.

Whats the bar they run at then?

dearing5 · 30-09-2008, 18:02

no money money till next week

whats the max boost i should run then? i have a gauge to check fuel

vxlgsi · 30-09-2008, 18:02

i thought it was 2.8, but im gonna work it out for myself when i do mine. id go for 3 to be safe

zx7r · 30-09-2008, 18:30

Quote:

Originally Posted by dearing5

no money money till next week

whats the max boost i should run then? i have a gauge to check fuel

ph2 chips run 13psi and 19psi overboost and set your FPR to 3.5bar with the vac pipe disconected

buzball · 30-09-2008, 18:33

This confuses me when people say disconnect the vacum what is this and is it crucial

dearing5 · 30-09-2008, 18:36

they mean take vacuum off when checking pressure as it gives the true reading because when the vacuum's on it drops.

13psi held? i have an mbc as well.

whats the limit before boost cut?

zx7r · 30-09-2008, 18:43

Quote:

Originally Posted by dearing5

they mean take vacuum off when checking pressure as it gives the true reading because when the vacuum's on it drops.

13psi held? i have an mbc as well.

whats the limit before boost cut?

not to sure about the boost cut but ive read people running 16-17 psi with no problems.

buzball · 30-09-2008, 18:57

I use to run 15-16psi on phase 2

dearing5 · 30-09-2008, 19:13

ok cool, im only getting chips to see if its boost cut im getting, which im sure it is. but least once i got them i got them

more fun either way lol.

well i'll set boost at 15psi or so and go from there and just see whats what.

will it still boost cut? if too high? im only looking for 1bar anyway will be quick enough.

**Orange Peel** · 30-09-2008, 19:18

You wont get boost cut with the adjustable boost controller unless you plumb it in with the amal valve.

Better to set it to say 14PSI, get the fueling right on the wideband and forget what pressure it should be. The wideband will be far more accurate.

Don't personally like Saab reds on P2/Evo5 as they never ran right on mine. Astra VXR injectors overfuel a little but the ride is far better.

zx7r · 30-09-2008, 19:20

if your only looking for 1bar dont bother with the MBC as your only 1psi away with the amal valve plumed in. have you got another turbo now as i thourt i read your penny valve was cracked

**Orange Peel** · 30-09-2008, 19:25

Quote:

Originally Posted by zx7r

if your only looking for 1bar dont bother with the MBC as your only 1psi away with the amal valve plumed in. have you got another turbo now as i thourt i read your penny valve was cracked

MBC is still worth having. Just depends on what kind of power delivery you're looking for.

With the MBC set to 14PSI it will climb slightly quicker as the waste gate wont open until 14PSI is met. With the amal valve a small amount of boost is lost throughout the rev range as the valve pulses to regulate boost pressure.

You also get overboost with the Amal valve but some people just like to hit a figure and hold it.

dearing5 · 30-09-2008, 19:50

Quote:

Originally Posted by Orange Peel

You wont get boost cut with the adjustable boost controller unless you plumb it in with the amal valve.

Better to set it to say 14PSI, get the fueling right on the wideband and forget what pressure it should be. The wideband will be far more accurate.

Don't personally like Saab reds on P2/Evo5 as they never ran right on mine. Astra VXR injectors overfuel a little but the ride is far better.

really? atm mine wont boost over .5bar it just cuts out and kangeroo's... i thought it was boost cut!?!?!

1psi away from 1bar, on standard chips? mine hates anything near that figure. how much of a boost leak can cause problems?

**Orange Peel** · 30-09-2008, 20:36

You've not fitted the chips yet have you? Standard boost cut is just under a bar (11PSI IIRC) so you may have another problem. Boost cut doesn't make the car kangeroo either so it could be a missfire due to the plug gap being wrong, not enough fuel, bad leads etc.

Mine used to kangeroo at 10PSI. Turned out to be dodgy HT leads. Changed them and it works fine upto 22PSI which is the Evo5 overboost limit.

Its not boost leak as such its how the wastegate works with the amal valve. Completely normal.

dearing5 · 01-10-2008, 07:14

it is taking a long time to spool up though, when should i be on full boost? going to look at waste gate.

**Orange Peel** · 01-10-2008, 07:48

Mines quite late too. It starts to make pressure around 3K then comes on full boost very quickly at 4.5K