N75 backing off the boost

[gti_shaun]

have you seen this happen before? yeah think i am going to have to drop down pipe.

 i know for a fact i have a small leak mani to turbo which im going to sort, i cant hear the blow but when i fire up from cold and put my finger there and blip the revs i can feel a small blow but i would not of thought it would be enough not to spool the turbo enough.

[Grand Master Patch]

Im running a R-Tech map on a AGU engine fitted with a K03s Turbo

Boost peaks at 22psi but the drops off to 18psi and holds. This is how it should be.

Can i ask how long it holds for,are you still at 18psi in the high revs?

[RTechUK]

have you seen this happen before? yeah think i am going to have to drop down pipe.

 i know for a fact i have a small leak mani to turbo which im going to sort, i cant hear the blow but when i fire up from cold and put my finger there and blip the revs i can feel a small blow but i would not of thought it would be enough not to spool the turbo enough.

A small blow will cause issues, The ko3/ko3s are prone to crack I rare to find one without any.

The best way to see whats going on is log the actual and requested load vs the N75DC%,  If the load reading is too high the ecu will back the N75 off. Load reading can be too high due to a maf over reading or of a sensor reading wrong and causing an offset in load.

Nick

[gti_shaun]

does agu have requested load?

ive done so many tests and stuff its unreal, and when i clamp off the pipe to n75 the one from boost pipe( so it doesnt see boost so thefore it does not move the actator) and it still drops boost as the revs go up to the point if 7psi at 6000 rpm, drops faster when n75 pipe is clamped so to me this says there it turbo prob, but ive had the intake off and there isnt and unwanted play in the turbo, its really confusing me now, ive put 21psi in the system and the only leak is the normal blow by when you pull dipstick out.

what about oxygen sensor as when i drive it like i stole it for a while it gets faster like the sensor is lazy when its not red hot or something.

i had it mapped by yourself in feb and it was only right for 2 week then had lack of power ever since what chance of booking in for a rolling road to see if you can find the fault nick? when i came up last time you put that maf on and all seemed good for a few hours, its like it learns the maf values than goes slow again.

[Rhyso]

does agu have requested load?

VAGCOM and log block 25 in the engine module 

Works a treat; watched Nick log an AGU on Wednesday and what vagcom showed was reproduced on the rolling road!

[gti_shaun]

Thanks i will have a look at the load, it is like it does not know its for load on it, as it drops like a b!tch in second gear but not as much it 3rd etc.what was up with the car you watched nick do on wednesday?

pm'd you nick

[Rhyso]

Thanks i will have a look at the load, it is like it does not know its for load on it, as it drops like a b!tch in second gear but not as much it 3rd etc.what was up with the car you watched nick do on wednesday?

pm'd you nick

The car had a KO3s fitted but half the intercooler pipework was leaking, as was a couple of the vac pipes and the TIP was practically hanging off!!

You could see the car request load but then never reach it due to boost leaks

[Grand Master Patch]

Im running a R-Tech map on a AGU engine fitted with a K03s Turbo

Boost peaks at 22psi but the drops off to 18psi and holds. This is how it should be.

Can i ask how long it holds for,are you still at 18psi in the high revs?

Bump

[gti_shaun]

i will do a log and post it then, 2000rpm to 6000rpm 2nd gear be okay then maybe do another in 3rd gear same.

[gti_shaun]

Right done some logs, is there a easier way to put the logs up rather than copy paste and mess about spacing everthing out so its readable?

anyway this is third gear flooring it from below rpm and going to forth for a short while, i did a few diffrent logs but to many slow ass sunday drivers on the country roads grrr, i thing the spec load compared to actual is pretty good and i dont see a problem, what do you lot think? please feel free if you have a agu ko3s to do some logs to compare, that would be a great help.



06A 906 018 CG       1.8L R4/5VT MOTR HS D02                             
                                   
             
              Spec. load   Load correc.   Actual load   Valve cycle      Engine speed        Ign. timing     
   TIME       3-8 m/s    0-8 m/s           0.5-8 m/s     0-99%           0-6800 rpm           
       
   0.36      11.05         10.1               10.1               79.3             3440                    15     
   0.87      10.95         11.05             10.35              82.8             3640                    16.5     
   1.37      10.9          10.95             10.45               84               3880                    18.8     
   1.87      10.85         10.85             10.45              86.3             4040                    20.3     
   2.37      10.75         10.8               10.4                86.3            4280                     21     
   2.87      10.7           10.7              10.5                 87.9           4480                     21.8     
   3.37      10.5           10.55            10.35               89.5            4680                     22.5     
   3.87      10.3           10.35            10.2                 91.4           4880                      21     
   4.37      10.05         10.1              10                    93.4           5040                      24     
   4.87      9.8            9.85              9.95                  92.6           5240                      23.3     
   5.37      9.55           9.6               9.7                   91.8            5440                      22.5     
   5.87      9.35           9.4               9.5                   91              5080                      31.5     
   6.37      8.15           6.15             4.55                  61.7            4400                     21     
   6.87      10.7          10.3             10.5                  87.5             4400                     17.3     
   7.37      10.65        10.6              10.5                  89.1            4520                      33     
   7.87      5.05          10.6              2.2                     0               4280                     33     
   8.37      5.1           10.6               1.3                     0              4240                        33     
   8.87      5.15          10.6              1.2                     0              4160                        33     
   9.36      5.15          10.6               1.2                    0              4120                        33     
   9.87      5.2            10.6              0.8                     0             4040                        33