Something definately changed between p3 and p3.5 with regards to the lambda cut.

There are also differences with the p3/.5 and p3/.5+ kits, cant remember what they were though.

quote:

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Originally posted by jamesw
i belive only extra protection with phase 3.5 is the extra lamba monitoring which will cut the boost if it detects the engine running too rich / lean.

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i belive only extra protection with phase 3.5 is the extra lamba monitoring which will cut the boost if it detects the engine running too rich / lean. Best place for any other questions like this is migweb :thumbs:

[Edited on 09-11-2005 by jamesw]

quote:

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Originally posted by miles
The quoted overboost is 1.5 bar, be interesting if it is quoted elsewhere at 1.6 bar as thats what mine overboosts to most the time.

As said, it depends on the rest of the spec as to what its safe to run. I hope you at least have the 4.5 bar fuel pressure reg and cleaned injectors?

P3.5 has an added lambda boost cut feature over p3, but if your running the apexi it may well prevent the ecu from cutting the boost. I certainly wouldn't want to test or rely on this in any way!

Do you have the 5 (or 12) position switch? Have you fitted the bits to this engine or bought it yourself?

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The quoted overboost is 1.5 bar, be interesting if it is quoted elsewhere at 1.6 bar as thats what mine overboosts to most the time.

As said, it depends on the rest of the spec as to what its safe to run. I hope you at least have the 4.5 bar fuel pressure reg and cleaned injectors?

P3.5 has an added lambda boost cut feature over p3, but if your running the apexi it may well prevent the ecu from cutting the boost. I certainly wouldn't want to test or rely on this in any way!

Do you have the 5 (or 12) position switch? Have you fitted the bits to this engine or bought it yourself?

it should hit 1.6 bar on overboost then hold at 1.25bar

quote:

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Originally posted by deanmcreynolds26
you will prob find he could run it at 1.8bar overboost, not that its going to be good for the stabndarad turbo though.. if it has one.. which im not sure! :rolleyes:

i have phase 2 and seen it run 20psi overboost holding about 17psi ;)

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sorry bad question yeah was asking what is safe ammount of boost to be running i was kind of under the impression that with eds 3.5 there are added safety features in comparison to the phase 3 chips which over ride you if you try running to much boost but as im not 100% with this wondered if anyone could clear it up, miles ive only just got a turbo car so take it easy mate im still learning hence why i havent turned the apexi to run over 1 bar yet, before i find out exactly what is safe to run.

[Edited on 07-11-2005 by Davido]

my phase 3 has hit 1.7 bar before

I've stored 1.78 bar (26psi) on my spa digital boost gauge before, it often overboosts to around 1.6 bar, which I dont see as a problem as its only there for a moment.

you will prob find he could run it at 1.8bar overboost, not that its going to be good for the stabndarad turbo though.. if it has one.. which im not sure! :rolleyes:

i have phase 2 and seen it run 20psi overboost holding about 17psi ;)

The apexi will go to whatever you tell it to, I assume that if he has settings like 1.8 bar someone has put presets into it?

P3.5 boost settings are 1.5 bar overboost, and 1.25 bar held. What you can get away with will depend massively on the rest of the spec.

If you have to ask questions like this (which haven't actually been asked, we're guessing) then I wouldn't recommend trying to set an apexi yourself!

dave was saying that the apexi goes to 1.8 bar :boggle: lol i dunno probs best to wait for him to post

miles, yeah the apexi is a digital amel valve basically, so you tell it how much boost to run. so it will only run too much boost if you turn it past the amount it should be running. so p3.5 should hit 1.6 bar boost

yeh he has phase 3.5 and an apexi boost controller, i think but am not sure, but i tihnk he's worried about running too much boost e.g blowing the engine / turbo into a few million pieces, it's kev corsa's old C LET

i think what dave is asking is if he switches the apexi boost controller on to full boost will it blow the engine?



[Edited on 07-11-2005 by MarkW]

So this guy has p3.5 and an apexi?

He wants to know if he can increase the boost with the apexi?

Surely you'll only run as much boost as you tell it to, so cant run too much boost, unless you tell it to?

Without knowing too much about the Apexi's, I presume they are like electronic mbc's, or programmable amal valves depending on which way you look at it.

the ecu wont turn the boost off anymore as the eds stuff over rides the original boost cut

What are the question marks for then? :boggle:

[Edited on 07-11-2005 by miles]

quote:

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Originally posted by miles
I dont understand the question.

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I dont understand the question.

You can't, the ECU will turn the boost off if it spikes too high, may even set the engine to safe mode.

just wondering as im little scared of messing with the apexi controller incase i try running it on too much boost?