mapping a gtr arggggggh

Oh yeh shes quick as she is now but like you explained to me at Spa there should be a lot more torque there!

Just an idea, but have you had a good read threw recipts you got with the car? Just to see if the car has had anything else done to it that you don't know about, that could be causing an issue if something has been fettled with before you bought the car maybe?
Or if that rattle isn't anything to do with the bell housing then maybe something else is loose & giving a false knock reading?

funnily enough I was kind of wondering the same thing, I know its got a separate aftermarket oil cooler fitted with pump and im wondering if somewhere the braided lines are rattling against the block itself and giving out false knock values

will have a check through all the paperwork tomorrow I thinks

Yep wont do any harm & may find your problem hopefully

Please go into more detail about how this car works. As when i read about it i start to think that my R is so simple to work on lol and so easy to fault find. Good luck with sorting it out though joking aside

haha in one everything is electronic including the complex gearbox

strip the electrics away and an engines just an engine but yes in comparison a gtir is simple.
to change the turbos on a gtr you need to drop the entire engine but like most things they are less complex than they initially look once you pull all the wiring and get all the rubbish out the way.
in some ways its a good thing in other ways not so good when you have electrical troubles such as im having at the moment

GTI-R US wrote:after chatting to him what was happening with car picking up false knock and retarding ignition he worked out that it was pulling back around 4 degrees of ignition with the knock values I had been showing.

Hi Bob,

Sorry to hear the bell housing wasn't the issue. At least our diagnosis from the logs is consistent with Iain's thoughts that the car is switching to a more conservative map (or at least just advancing the ignition a little more for safety). The GTR has 2 knock sensors? Would it be worth checking their condition, and making sure they are connected properly? A quick Google search seemed to show a few GTR owners complaining of failed/failing knock sensors…….

Hope you can get it sorted soon!
Dave

cheers dave
yes your correct they run 2 knock sensors one on each bank.

I spoke to iain about them possibly being faulty yesterday and he said hes not seen one cause problems as of yet but theres always a first I guess.
theres no error codes being thrown up but as we know with the pulsars that does not necessarily been there isn't a problem.

il try do another run with fresh fuel first though to see if knock values are still high and send a copy of datalog to you to mull over as well as the mapping guy.

if still high ive got another engine here so il remove knock sensors from that and swap them over to rule them out. like the pulsar though they are a real bitch to get at looks like the whole inlets got to come off just to get to the damned things, but if that's potentially the prob then that's what il have to do

Hi Bob,

Here are the links to the websites which I found this morning. This was literally a 5-second Google search so may not be exactly the same scenario as yours, but perhaps worth a read anyway:

GTROC

GTRlife

Hopefully it won't be the sensor, although it would at-least give some conclusion if it was.
Keep us posted!
Cheers,
Dave

cheers dave
yep im already on gtroc

im off for the weekend shortly but will look into it with more detail next week for sure, thanks  

just been looking at litchfields revised software package for gtr and think il go for there stage 4 new ecutek and ditch the cobb software I already have
amazing stuff really if you can see the link below, very interesting

http://www.gtr.co.uk/forum/218585-litchfield-version-4-maps-powered-ecutek.html

Will this get to the bottom of your false knock issue Bob?

no I may need to sort that myself prior but not so easy whilst you've got my car

can I have it back now please you've had it for ages   

I suppose so if your going to sort that false knock out.. Its doing my head in, I got smoked by a 1.2 corsa yesterday & got laughed at... Damn knock kicking in.

Ill let you sort it & have a month of fun in it. then im taking it back off you as iv booked a few track days in it this year

The Litchfield V4 maps seem very nice indeed. I particularly like the in-built monitoring of fuel pressure; something often overlooked especially if you're cornering hard and prone to fuel starvation. Definitely seems like a nice upgrade.

Will be nice to seem some logs once you've got your false knock sorted
Dave

yep thanks dave

il upload you another full log once ive had a chance to rectify the gremlin lol
then il probably go with the Litchfield ecutek and ditch the cobb as it does appear to have some very usefull features as you've rightly pointed out
I see it as a bargain at £600 including fitting and setup and il be able to flog the cobb on for a good price too so just makes sense to go that route really with the latest software

Well as some of you know my false knock issue is now resolved   
It did turn out to be a very poor map after all and now car has the ecutec stage 4 by Lichfield all is good and car deffo has much more torque although less Bho but it is much nicer to drive.

Also had the litchfield bilstein suspension fitted which has definitely firmed the car up at speed on fast cornering, I also had the ride height dropped half inch from standard which seems to have helped with bump steer
Well happy with car now but the real teller will be at spa in around 3weeks time

So is this as far as you can go without uprating tubbys etc ???

watoga wrote:The Litchfield V4 maps seem very nice indeed. I particularly like the in-built monitoring of fuel pressure; something often overlooked especially if you're cornering hard and prone to fuel starvation. Definitely seems like a nice upgrade.

Will be nice to seem some logs once you've got your false knock sorted
Dave

Il try get another datalog  sometime in near future Dave and email it across to you so you can take a look and compare, il need to buy a cable though as unlike the Cobb I have no data cable and software to upload it at the moment

nomad wrote:So is this as far as you can go without uprating tubbys etc ???

Can take it a little further Leighton but that's as far as I'm prepared to go on stock engine as I do drive her quite hard and it's used on track.
I'm gonna strip the new engine in my workshop and fully forge it including steel rods. then next year il be buying bigger turbos and may take her to around 1200bhp

Need to finish the Rasheen first though

Probably a good decision on not pushing it so far on the edge ... is there room to bore it out more for larger pistons ... i mean it puts a fair bit of power without modification to begin with ...

GTI-R US wrote:

nomad wrote:So is this as far as you can go without uprating tubbys etc ???

Can take it a little further Leighton but that's as far as I'm prepared to go on stock engine as  I do drive her quite hard and it's used on track.
I'm gonna strip the new engine in my workshop and fully forge it including steel rods. then next year il be buying bigger turbos and may take her to around 1200bhp

Need to finish the Rasheen first though

Bob you have far too much money, think you should share some of it with us mere peasants   

Seriously though, how long do you think those tyres are gonna last with that kind of hp?

^^^
Trust me Pete I'm not as rich as you think I am lol
My addiction to cars and bikes has cost me dearly over the years that's why I work all the hours god sends to pay for my extravagant toys   

I think most of us have learnt the hard way with the expense of cars power chasing modifying i know i have .... maybe not on as large of a scale as you .... to be fair i dont really have that option nowadays its all the mundane things come first and the pulsar comes last ..... long gone of the days of living at home and spending every penny on cars lol