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Single turbo AFR's


dangerous brain

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I doubt that Mike it goes off the gauge rich @ 11:0 ;)

 

still getting to grips with it - lol - how you guys use GT40's and bigger on the road...

 

my view of the afr is fleeting at best.. I find it impossible to will my eyeballs off the raod when under power..:rolleyes:

 

strong stomached co-pilot needed...

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OK I am re-visiting this thread after seeing this

http://www.mkivsupra.net/vbb/showpost.php?p=1260499&postcount=23

I am really concerned about this now. How rich is too rich? I don't want to fudge my engine using the car at donington if thats what will happen running an AFR of 10 to 10.5

 

I'm pulling the plugs and oils before I take it to donington. I assume I will be able to see from the plugs if I am in dodgy territory?

 

I may still have access to lab oil testing if my old buddies still work there. Is it worth calling in a favour to get the oil I remove tested?

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I'm currently attempting to map my T61 on a manual, and I have a constant 14.7 at sub 0 PSi, I do have some areas that it trys to dive into the 10's but only when changing to high gear at low revs.

 

TBH I think that it is OK as it is, for the moment, but I will be trying to get rid of the 10's as soon as possible.

 

As for what everyone else has said, they are all good points. I am currently only hitting 0.5bar with my new turbo, but when it has been run in for a few more miles, I will be aiming for 11.4/11.5 for anything over 0.7bar, and a correlative AFR rate upto that point from 14.7.

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MMM tonight I took her out for a burn. It sits happily at normal AFR'S circa 12-14 off boost throttle amount dependent. As soon as I put my foot down and boost surges in I get a flat 10.0 AFR on my AEM gauge. Now I've been told that the AEM bottoms out at 10.0 AFR. Does it also go with the 3 straight lines across it if it goes silly rich like it does at the other end if it goes silly lean?

 

Another question here does anyone know where to get a connection cable for a pc for a HKS fcon?

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dangerous i think you are skerting the issue here mate you will struggle to deduce anything from the magic art of looking at your plugs and also getting the oil analysed for blowby products sounds great on paper but this is no substitute for having the car set up, i know you have ecu issues but i really would not risk ragging the car on the road never mind spanking it on a track till you get it soughted, you may find this thread ends with "help i've blown my motor" pretty soon

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Another question here does anyone know where to get a connection cable for a pc for a HKS fcon?

 

 

You cannot access the ecu without a special key dongle from HKS which only HKS authorised installers/tuners have. So even if you did find the cable it would do you no good as you do not have the software/key. ;)

 

 

Assuming of course you are taking about the Fcon S / V or Vpro.

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dangerous i think you are skerting the issue here mate you will struggle to deduce anything from the magic art of looking at your plugs and also getting the oil analysed for blowby products sounds great on paper but this is no substitute for having the car set up, i know you have ecu issues but i really would not risk ragging the car on the road never mind spanking it on a track till you get it soughted, you may find this thread ends with "help i've blown my motor" pretty soon

 

You cannot access the ecu without a special key dongle from HKS which only HKS authorised installers/tuners have. So even if you did find the cable it would do you no good as you do not have the software/key. ;)

 

 

Assuming of course you are taking about the Fcon S / V or Vpro.

 

Ah well that answers that then. Paul I have no intention of taking the car anywhere under any boost, in fact the car show its booked for on friday I am tempted to take it to on a trailor. What I wanted to know is if there was anyway of seeing if the Fcon was locked before I took it for mapping. If it is locked then I will take the hit and fit an AEM and have that tuned. If not I'll get the Fcon tuned. Going on what gamer has said then I won't be able to find that out. I just thought that if people non-hks trained and franchised can tune an Fcon if its unlocked then there must be a way of seeing if its unlocked or not, obviously that way would entail linking it to a pC

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Ah yes donington is now my trigger point. Hence why I am trying to find out if my Fcon is locked or not. If its locked then I am having no choice but to take my range rover round the track and wait until my AEM is available and a suitable tuner to tune it. If the Fcon is tuneable I'd rather go down that route and leave the gearbox to the stocker, and also make it to my birthday race event.

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All fcons are 'locked' , as I said you need the software and the key dongle to access the ECU. I believe the tuner also password protects the map as well so no changes can be made, hence the need for a remap if using a different tuner then the original who initially mapped it.

 

Contact that person that I mentioned to you a short time ago, he might be able to assist you.

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Guest Terry S

On yours Mike it would be the HKS wide band O2 sensor that is linked into the HKS Knock Monitor, and subsequently the HKS V Pro. That is the only O2 sensor on the car that can have any impact on it's running now.

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Contact that person that I mentioned to you a short time ago, he might be able to assist you.

 

Ah did that allready. His standpoint is very valid. HKS aren't worth f*ck*ng with as they prosecute for infractions on their rights etc etc etc. Its not worth his business to go against this. So I have decided to go with the AEM as originally planned. The man that can is going to map it for me

so watch this space for some good things said :D

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On yours Mike it would be the HKS wide band O2 sensor

 

Thanks Terry, I'm out of the country so I can't check (I'm certain everything is fine), but I like to know as much about the car as possible... there is a lot to learn still!

 

so watch this space for some good things said :D

 

I hope that means you should be on time to track the aristo at donington... I look forward to seeing one in the flesh!

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If it's a blip to the 10's it's probably there for a reason...duch as knock...Reg did a fantastic job with it and it's self learning..with knock monitors etc...I wouldn't be too quick to tamper.

 

Been out playing today after an oil change. I'm starting to think I'm a hypochondriac.

It flicks to 10 somethimes on lift off but thankfully it's solid steady at 11.6, rising to 12 on wot at high revs....

 

Any news on the aristo DB?

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Its booked in for the Monday before the trackday (cutting it as close as a gillette G3 huh ??) I just changed the oil and plugs today. Plugs are coked and looking in the cylinders the piston crowns have a distinct tan about them. If I had the confidence in what I was doing I'd turn the Fuel pressure down a tadge as its running at 12 AFR cruising, but knowing my luck I'd turn the bloody thing the wrong way. General servicing I know what I am doing but voodoo stuff I know not what I do so I won't do it.

 

Regardless of the cars ability to track once I've set off to come to Donington I'll be there. If the car isn't trackable then thats just Karma.

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  • 2 weeks later...
Oh really? Do tell.

 

Right. Looks like I jumped the gun a bit with this. There is obviously two sides to every story and going off half cocked after hearing half of one half a story was a bit wrong of me. I have spoken to Arnout about the situation (well to be fair he has spoken to me about it as he rightly isn't happy with what I have said here) I won't go into the ins and outs of what I was told as its not something that needs discussing here. Suffice it to say I should really have spoken to Arnout before opening by big mouth. I apologise to Arnout for besmirching his reputation in any way. Sorry dude.

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Guest Bijal
Well seems as I have been dragged back for the day could some of you kind folks answer me a question?

 

Does the AFR stay constant with a single conversion? What I mean by that is when the car is sub boost ie negative pressure on the boost gauge does the car run lean normally ie around 13-14 on the AFR at about 2k rpm and in the 12's at 3k rpm. As soon as boost comes positive it starts to overfuel a bit to about 10.5 and sits there all the way to max boost that is set to 1.2 bar.

 

I have yet to sort out the tuning of this car. I am waiting on an aem but I'm not sure to use it as there are issues with the auto box on the supe never mind aristo and the auto box with aems. I am loath to keep the HKS Fcon as it gets password locked by anyone that will or can tune it.

 

The EGT's look OK to me peaking at 760 at 3k rpm at 12's AFR. Is it safe to continue running the car as is til I sort out the tuning?

 

unless i havent read this post properly, has your f-con been last mapped in japan?

 

regards

 

bijal

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Guest Bijal
I believe so chap. It wasn't mapped this side of the sea lets put it that way.

 

ok, these temporary dips into 10 a/f ratios, has it always been there or just started recently?

 

bijal

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Guest Bijal
As long as I had the car yes. The wideband was only fitted just before I bought it. I have now fitted an AEM and the AFRs are now spot on. Have to admit I expected the AFRs to be lean as the Japanese fuel is higher octane so you shouldn't need as much right

 

thats good news, i was going to explain as to why you were having them problems but as its sorted out now with the aem theres no point.

 

yes japan run higher octane fuel but the general consession in running higher octane doesnt mean you can lean off the fueling, its just allows you to run higher boost or reduce the chances of det with the present setup unchanged.

 

regards

 

bijal

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