Now about that ignition cut, I PMed frpe82 ....guess he is too busy.. so will post here
While testing M90 soon noticed that engine tends to cut off in 2nd gear near 5000 rpm.... than started to watch on boost gauge as soon car gets to 0.8-0.9bar of boost for few secs it cuts off....
I run only fuel chip, standart turbine, weather temp - +25 Celsius, running on 98 octane gasoline...
On way back to garage tested car in 3rd gear... to see if big air flow will help to cool down....same situation.... just above 4000rpm...0.9bar of boost for 2-3 seconds and something cuts off...
.....
next day did more testing and here is what I have to say:
Firstly I added new fuel to see if there are no changes... all the same, can't hold the boost.
Then disconected lamda sond .... but the same as I get to 0.9bar for second or two..something cuts off
Then changed fuel filter.... nothing.
Then advanced ignition as far as mechanicaly possible.. puted car under boost... and hurrey gain about 500rpm before cut off... now it was shutting down at the same 0.9bar but now in range of 5500rpm in second gear and bit earlier in third... but now engine could whistand boost for something like 4seconds....
Then I came to conclusion..that temperatures in combuston chamber are to high....
- I decided to add 20% of E85 to petrol.. to see what will happen....
idled car for a while .... drow slowly..constantly giving it harder and harded... then crossed my self and put pedal to metal
.....
and I gain something like 300-400revs... now it was cutting off near 5800 in second.... and 5500 in third... lowered boost till 0.7bar.. and I could get into revlimitter in second and third.....
then raised boost again till 0.8-0.85Bar boosting in second gear from something like 30km/h start it went strongly till revlimitter...and in third it went up and hit boost cut just before revlimiter a bit past 6000rpm.
...................
so.... what can be said in conclusion?
either my T25 is now producing more air than it did..or weather temp has great impact on my brick
maybe one of injectors is defected or working badly?
I quess it can't be some kind of boost leak?
Is it possible to adjust MAF to help it run richer... I know on LH 2.2 on Volvo480 it was possible to do....
I need chipable EZK from sweden or USA or somewhere else..cause I can't find one here in Latvia
I have set of CI injectors 42lb/hour... it is time to switch to E85?
I need bigger intercooler....?
I need wideband sond... to understand whta is going on in engine....
I need Hi-Tuning and T-bricks sticker on my brick to keep all the gremlins off the car.
Any coments welcomed.....
volviz