hi guys not sure where to post this for help. so i messed around with my torque app i know not very accurate, but i did i think i boost log. now not sure if this is correct seems it peaks at 19ish but falls to 10psi at 6000rpm,  the car so say is mapped stage one i have no proof though,  seems to pull ok not stutters or anything, 

 

just replaced the stock dv with 008 forge, but never check a log with stock dv,  also just done catch can again not logged without it,   

 

so can anyone tell me is his ok or do i have a issue!!

 

many thanks

 

 

How is it compared with specified? You need the 2 line graph really to show how it's following what is requested. Looks like it could be tailing off though. If you've not got a boost leak it could be a weak actuator. The stock dv is fine by the way, nowt wrong with them at all. Is the 008 set up right? Can they be spring or shim tuned? Would be worth comparing to stock dv too.

how do i do specified?  

 

yeah im gunna try the stock one, see how it goes, i opened the forge one it had yellow spring so should be fine for it

Don't know if you can with torque app, sorry I forgot it wasn't vcds. There may be a way I don't know. With vcds once the data is highlighted in excel just click insert, graph, 2 line. It won't convert it all properly but at least it shows you the 2 lines. Is yellow spring the lowest? You may find with a map you need the middle one or at least a shim or 2. Is it brand new?

No yellow is the middle one. Maybe I need a shim I bought it second hand I need to speak to forge as the screw heads are a bit warn so I will get a service kit for it aswell.

Middle one should be spot on. Might be worth a service if it's used though.

this could be slightly embarrassing. , so on way back from dentist i popped in to forge lucky me there on me doorstep. picked up service kit £15 and some new screws. so just went out to swap the forge with the old dv so on way home i could log that one., and the forge was slopping around in the tip hose i didn't tighten the fecker up properly what a ****er! so this could be my issue infact i would be 100% it was!!  see on the way home after i service the forge and re fit tightly!!!

That might explain it. I'd call you a numpty but I'm sure many of us have done something similar, I know I have, usually spotted before test run though.

thanks matey!  youll be glad to know i have my new badge fitted now!

How long did that take?

a while! kept meaning to order it and never did!

no change on the graph still dropping off  with the forge serviced and tip tightened, ill have to run the stock tomorrow. wish id tested all this before the catch can and forge dv intsall.   of course it could be the map set to tail off?

 

 

Edited 1 February, 201610 yr by dan281082

The map wouldn't be set to tail off, after the spike yes but quickly and to specified which it should follow. The ko3s is known for running out of puff at the top end mind, but that does look like more than that. A map will exacerbate any weaknesses, particularly those parts that have to hold tight under higher boost pressures. If you have an actuator with a weaker spring or perishing diaphragm for example, you could run it stock and barely notice, but higher pressures would show it right up. A weakening actuator won't be able to stand up the increasing pressures top end and hold on all the way.

so how do i check the actuator? just replace which i can imagine is a right bitch of a job?

The map wouldn't be set to tail off, after spike it drops but quickly and to specified. The ko3s is known to run out of puff but that looks like more. What a map will do is show up any issues with perishables whose job it is to hold on to boost. For example if the actuator (if it is this) has a weakening spring or perishing diaphragm it won't be able to hold on to the increased pressures all the way to the top. A remap will show this problem right up, could be other things mind. How's your pipework around the intercooler?

There's bound to be someone near you who has vcds can help you log?

so how do i check the actuator? just replace which i can imagine is a right bitch of a job?

I didn't think that reply above got posted my battery ran out!

It is a pig of a job really. It can be checked some, log boost with n75 unplugged, it should hold a steady 5psi on a dead straight line, if it's lower there may well be an issue, which may be rectified by adding a touch of preload or a ppikey mod with external tension springs. Means you may not need to remove it to improve it, although it would need replacing ideally if that is the problem.

what do i need to log the actual against the specified?

can i just unplug the plug to the n75 valve and log from there?

unplugged n75 got these results

 

So that's logging boost as normal, just with it unplugged yes? Hmm it should be a flat line even if it is low. It looks as though there could well be an issue with the actuator. Your turbo must be working pretty hard to keep boost going the way it is.

You can try a few things (probably all of them), you could:

1. Try a a turn at a time of preload onto the bolt at the actuator arm - not an ideal solution but will help decide if it's a spring or diaphragm issue I guess, if there is little or no change its probably internal diaphragm. This shouldn't be viewed as a longterm solution because it can put the turbo under too much pressure.

2. Try external helper tension springs, not easy to find the right springs. They don't have to be very strong but should improve it. Search pikey mod and you may find a post by me, also should be stuff from other forums through Google, search actuator spring mod 1.8t.

3. Do logging with vcds to help pinpoint the problem

4. See Bill at Badger 5 (local to you?)

5. Get a reconditioned standard actuator (CR turbos) or an uprated beach buggy one and get Bill to fit it.

P.s my diagnosis thus far is based on personal experience and the available data, I feel more investigation is required before you spend bucks based on my advice. I'd hate for you to spend out and it turns out to be something else. Preload adjustment is free and vcds logging should be fairly cheap, could save you money in the long run.

Thanks for advice fella. Gunna give badger bill a call in morning see if he can advise or diagnose for me hopefully won't cost a fortune to diagnose

Yeah give him all the info, he'll charge for a diagnostics but it will be a proper session and he'll more than likely get to the bottom of it. Expect he will give some useful advice over the phone too. He's a busy badger mind, hope he can get you in soon.

Just plugged in and I have fault code p1548 boost pressure for n75 valve maybe cus I unplugged it?

just spoke to badger 5 he seems to thing its loss of pressure. thats what the k03s does. small turbo issue. anyway he will smoke test and dyno it for me today ,. £ 60 if anyones interested personally i think thats a good price, very interested to see what comes back from that

That is a good price especially as it comes with Bill's knowledge. I can get just a smoke test done pretty cheap but that's going nowhere near a dyno. Good stuff, good luck