for people running 850 primarys

[turbotoaster]

Sorry to ask but im looking to see if theres anything im missing here.

Installed my 850cc in the primarys after milling 3.1mm off the rail.

Started the car up from cold and was idling at 11.8-12 which i expected as its cold and i just reset the power fc.

Before starting the power fc i set the ecu up for the bigger injectors.

FR-PR %63.0 +0.04
FR-SC------- +0.00
RR-PR %63.0 +0.04
RR-SC------- +0.00

PR 850cc
SC 850cc


now the engine warmed up and its sitting at 11.2-11.4 on idle.

Tried to change the INJ map.......didnt make any difference
Tried to change the PIM voltage..didnt make any difference
Tried to change the inj lag to 0.40..didnt make any difference

Is there anything im missing here, i know im not gonna get the same idle as 550cc but was expecting high 12s to low 13s from what people were saying.

the inj duty at idle wont go below 4.9% is that the lowest it will go down to?

I have done some research but wondered if anyone on here could chime in and help

[a.tapos]

maybe 4.9 is the lowest the pfc can acurately control before the injector control becomes unreliable
 
wont lowering the base map help as the inj map is a very small correction,
 
Where did you find your set up figures to run the 850cc`s
 
i know blitzboys pretty good with injectors

[turbotoaster]

actually running minus lag helped in the end, im now running -0.30 which gives me 12.9-13.4 afr idle, been running around for a few days with this setup and seems decent enough.

This is with 3.9-4.1% injector duty at idle

I have since then tuned alot of my map at 1bar of boost, but now having issues with getting the second turbo to work all the time, for some reason it works when it feels like it, for some reason it sounds like when the second turbo opens up the BOV opens and lets the pressure out :S

[a.tapos]

Its a pain how you think youve fixed one thing and end uip with a completely different headache,well done with the initial fix though
 
maybe since youve got a bit more power and boost from it the bov spring isnt holding properly,
 
have you tried running with the bov removed,
 
sounds a bit simple but may just need the bov spring tightened
 
unless of course its fixed,

[turbotoaster]

i know, its an ongoing battle it seems, will be nice when i finally go single turbo as ill have none of these silly issues.

bit more fiddling on the map means 13.2-13.5afr on idle now, i think thats the leanest ill get it unless i discover something else new.

well did some testing the other day, blocked the vaccum pipe going to the bov and as soon as it went to 0.3bar on the first turbo the bov opened and let all the pressure out.

so went back to before, tried blocking off the vac pipe to the other bov(at back of engine) as i know that is used in the transition and got no second turbo at all.

If it just didnt work at all i could assume that i have a broken solenoid or that i have connected something up wrong when putting the rats next back in, with it being intermitant it could either be split pipe or dodgy solenoid i would have thought.

Its raining hard today so ill just have to have a think and stare at the ac diagrams in hope again

[pigeon]

Sorry to ask but im looking to see if theres anything im missing here.
 
Installed my 850cc in the primarys after milling 3.1mm off the rail.
 
Started the car up from cold and was idling at 11.8-12 which i expected as its cold and i just reset the power fc.
 
Before starting the power fc i set the ecu up for the bigger injectors.
 
FR-PR %63.0 +0.04
FR-SC------- +0.00
RR-PR %63.0 +0.04
RR-SC------- +0.00
 
PR 850cc
SC 850cc
 
 
now the engine warmed up and its sitting at 11.2-11.4 on idle.
 
Tried to change the INJ map.......didnt make any difference
Tried to change the PIM voltage..didnt make any difference
Tried to change the inj lag to 0.40..didnt make any difference
 
Is there anything im missing here, i know im not gonna get the same idle as 550cc but was expecting high 12s to low 13s from what people were saying.
 
the inj duty at idle wont go below 4.9% is that the lowest it will go down to?
 
I have done some research but wondered if anyone on here could chime in and help

Hi mate. Got a quick question for you. After you milled 0ff 3.1mm did you find your injectors didnt sit flush. Thus the need to counter sink it?
 
Cheers Adam

[turbotoaster]

i didnt bother counter sinking as the injectors fitted fine after, you may want to if that floats your boat but hasnt made any difference to mine not doing it so personally u wouldnt bother.

[pigeon]

Ok cheers mate. Mine needs counter sinking as the injectors dont sit flush with the rail. Just wondered if yours was the same.
 
Cheers Adam

[SmbFD3S]

I countersunk mine too as found the same thing and didn\'t seat properly... Have removed them from the car and back running 550\'s for the time being as getting them cleaned/flow tested with another set so they\'re balanced as something wasn\'t right....
 
Worth getting them done before you put them in the car mate

[turbotoaster]

looking at other peoples pics of the rail once its been machined it looks like ive taken more off than they did so maybe thats the difference, i just took 3.1mm off with the miller, so maybe other people took less off im not sure

[pigeon]

I countersunk mine too as found the same thing and didn\'t seat properly... Have removed them from the car and back running 550\'s for the time being as getting them cleaned/flow tested with another set so they\'re balanced as something wasn\'t right....
 
Worth getting them done before you put them in the car mate

 
Did yours sit like this pre counter sinking them?
 

[pigeon]

looking at other peoples pics of the rail once its been machined it looks like ive taken more off than they did so maybe thats the difference, i just took 3.1mm off with the miller, so maybe other people took less off im not sure

I did the same as you mate. Took 3.1mm off. I shall just counter sink it so they sit flush.
 
How the a/r going?

[turbotoaster]

yeh strangly enough i could sit them flush and bolt the cover over without there being any gaps, i was unaware there was an issue for some people until i read about it.

by a/r do you mean air ratio, ie fueling?

If so then im running in the low 70% inj duty range, mid 13s idle, low 14s cruise and mid 11s full boost.

When i get a chance to hop on the motorway in the future ill work on my motorway map and get it to around low 15s for fuel economy.

If you on about something else let me know lol

[SmbFD3S]

Can\'t honestly remember mate, but i just copied the original rail and just chamfered the edges until it seated and i was happy with it...
 
To be honest as long as the top and bottom O rings are seated thats all that matters.
 

Did yours sit like this pre counter sinking them?
 

[jon103a]

hi, when i did mine i took of a straight 2mm as instructed by pip at wgt, fitted them and he tuned it all up. never had any issues. jon.