dangerous brain Posted January 15, 2007 Share Posted January 15, 2007 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? Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 15, 2007 Share Posted January 15, 2007 Yea that will be ok.. a little rich but it wont do any harm. Toquicktostop has a auto single supe going AEM by turbofit now.... give him a pm in a week or 2 to get his views on the auto and AEM;) Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted January 15, 2007 Author Share Posted January 15, 2007 ItS not the rich I am worried about its the lean when off boost when the EGT's are 40 degrees higher than when on boost. Having not had an AFR meter before I have nothing to compare my current readings to. Quote Link to comment Share on other sites More sharing options...
SimonB Posted January 15, 2007 Share Posted January 15, 2007 13 or 14 isn't lean. 14.7 is the ideal for economy, efficiency etc. You just need richer than that to avoid det when in boost and high rpms. The standard ECU will try and maintain 14.7 when under 4000rpm IIRC. So that sounds fine. 10.5 is pretty rich though, I'd avoid running it too much where it's that rich. Too rich for too long can cause bore wash where the oil stops working properly and causes cylinder bore glazing. Not that likely at 10.5 but I wouldn't want to risk it too much. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted January 15, 2007 Author Share Posted January 15, 2007 Cheers dude. I don't actually boost it that much at the mo as the car really needs mapping. Running lean is almost an obsession for me having done a bit of internet reading about lean issues. It's the rise in EGTs coupled with the lean burn that had me worried. To be fair my BPU++++ supe ran about 100 degrees higher on the same boost. Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 15, 2007 Share Posted January 15, 2007 760 is low EGT's:) Quote Link to comment Share on other sites More sharing options...
Pig Posted January 15, 2007 Share Posted January 15, 2007 MY AFR ratio gauge is all over the place untill boost is on, often in the max red. (doesnt mean its rights though (prob why im rebuilding the engine) Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted January 15, 2007 Author Share Posted January 15, 2007 760 is low EGT's:) So Maybe I can push the jap map a bit further than 1.2 bar ??? Quote Link to comment Share on other sites More sharing options...
Jake Posted January 15, 2007 Share Posted January 15, 2007 760 is low EGT's:)...depending where the EGT probe is positioned of course. Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 15, 2007 Share Posted January 15, 2007 ...depending where the EGT probe is positioned of course. Yea true... worst ways it only works to 900ish which is still acceptable. I would get it mapped before raising the boost though:) Quote Link to comment Share on other sites More sharing options...
Mike B Posted February 7, 2007 Share Posted February 7, 2007 Another similar question - GT35 running up to 1.6 bar - at full wot, say 5k+ what should the ideal afr be? vurious, as the times I've forced my eys off the road, I'm sure it's 10-10.5 on mine. Quote Link to comment Share on other sites More sharing options...
Gamer Posted February 7, 2007 Share Posted February 7, 2007 You are running rich, 11.4 is a good figure to shoot for. Quote Link to comment Share on other sites More sharing options...
Mike B Posted February 7, 2007 Share Posted February 7, 2007 Thanks Gamer, I'll have a good look when I'm out next. Keeping your foot down and looking at the guage at the same time is not easy - I may have to enlist the services of a co-pilot. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted February 8, 2007 Author Share Posted February 8, 2007 I need to plug my system into data logging or get it onto a rolling road real soon. I'll run it at castle donington soon and if Chris wilson is bored I might tempt him to take a looksee at the readouts as it goes round see what he reccomends Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted February 8, 2007 Share Posted February 8, 2007 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? I have had the AEM fitted and mapped with the Auto box and the gear change is superb no issues at all, the gear changes do seem to happen more often than with a standard ECU, the problem I did have was that the standard Auto box started slipping at 400BHP and we had to back off, I am now going Manual with Turbofit fitting a 6 speed box Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted February 8, 2007 Author Share Posted February 8, 2007 Who mapped your AEM? My box is possibly "built" by HKS. It certainly doesn't slip putting 1.2 bars worth of power through it. Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted February 8, 2007 Share Posted February 8, 2007 Who mapped your AEM? My box is possibly "built" by HKS. It certainly doesn't slip putting 1.2 bars worth of power through it. Dan mapped the car at Turbofit, we got to 1.2 bar before the slip started, shame really as we were really happy with the gear change, I was looking at going Boost Logic or TH400 but Gamer has issues with the boostlogic box letting him down so I am going manual Quote Link to comment Share on other sites More sharing options...
Alex Posted February 8, 2007 Share Posted February 8, 2007 Thanks Gamer, I'll have a good look when I'm out next. Keeping your foot down and looking at the guage at the same time is not easy - I may have to enlist the services of a co-pilot. 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. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted February 8, 2007 Author Share Posted February 8, 2007 Right this is the third time I have heard that dan is the man that can with the AEM so I guess its plunge time. When the weather gets better I'll book it in. Does it take longer than a day to map a car right? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted February 8, 2007 Share Posted February 8, 2007 Another similar question - GT35 running up to 1.6 bar - at full wot, say 5k+ what should the ideal afr be? vurious, as the times I've forced my eys off the road, I'm sure it's 10-10.5 on mine. Thanks Gamer, I'll have a good look when I'm out next. Keeping your foot down and looking at the guage at the same time is not easy - I may have to enlist the services of a co-pilot. I doubt that Mike it goes off the gauge rich @ 11:0 Quote Link to comment Share on other sites More sharing options...
Alex Posted February 8, 2007 Share Posted February 8, 2007 Right this is the third time I have heard that dan is the man that can with the AEM so I guess its plunge time. When the weather gets better I'll book it in. Does it take longer than a day to map a car right? Miami GT use Dimitri Arnout is a bit handy too.... These guys have a long history with the AEM...so there are other options. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted February 8, 2007 Author Share Posted February 8, 2007 Yeah from what I hear dimitri is hard to pin down and recently my confidence in arnout has been knocked a bit. I was gonna get in on the day that dimitri was due over for miami GT but the date just didnt happen. To be honest I can't see why just using the HKS Fcon thats fitted isn't an OK option. It was good enough for do-luck that had it fitted. My only worry is the fact that all the tuners lock the map and the only people that can tune it are HKS authorised agents. I remember how outraged I felt with the f*ck about that Jake had with his. Quote Link to comment Share on other sites More sharing options...
Gamer Posted February 8, 2007 Share Posted February 8, 2007 Yeah from what I hear dimitri is hard to pin down and recently my confidence in arnout has been knocked a bit. I was gonna get in on the day that dimitri was due over for miami GT but the date just didnt happen. To be honest I can't see why just using the HKS Fcon thats fitted isn't an OK option. It was good enough for do-luck that had it fitted. My only worry is the fact that all the tuners lock the map and the only people that can tune it are HKS authorised agents. I remember how outraged I felt with the f*ck about that Jake had with his. Even if it was unlocked the HKS software is not available to the public. IIRC, Dan at Turbofit can access and map the Fcon. Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted February 8, 2007 Author Share Posted February 8, 2007 Ah so maybe I don't need to worry about an AEM and its impact on my gearbox. Quote Link to comment Share on other sites More sharing options...
Jake Posted February 8, 2007 Share Posted February 8, 2007 recently my confidence in arnout has been knocked a bit. Oh really? Do tell. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.