Milo500 Posted May 17, 2016 Share Posted May 17, 2016 Hi guys, Have just installed an aem afr wideband sensor anf gauge....one of the many needed upgrades for a single turbo conversion. The car is already single converted (from previous owner) and I am installing a Ecu ect. Soon....however, on the stock ecu, the gauge is saying that it is running rich when under a bit of boost, and never leans our apart from letting off the throttle.. Is the gauge working correctly as surely it should be leaning out like he'll with a single turbo and a stock ecu? Cheers, Tom Quote Link to comment Share on other sites More sharing options...
berg Posted May 17, 2016 Share Posted May 17, 2016 How much boost are you running? What are the reading on the gauge? Quote Link to comment Share on other sites More sharing options...
Milo500 Posted May 18, 2016 Author Share Posted May 18, 2016 How much boost are you running? What are the reading on the gauge? 18psi shown on a greddy professional boost controller. Is going right down to around 10/11 under boost. It also jumps around a he'll of a lot when driving normally aswell :/ - - - Updated - - - Profec* Quote Link to comment Share on other sites More sharing options...
trebor69 Posted May 18, 2016 Share Posted May 18, 2016 10/11 under boost is fine, mine flickers around too and can be anywhere between 14.5 and 15.5 driving normally Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 18, 2016 Share Posted May 18, 2016 What turbo is it? sounds like its putting out similar airflow to the std twins to be run by the std ECU, I am guessing its a small turbo as the injectors will be on the small side to say the least. The transitional RPM/load will see the reading flitting about a lot, should be a lot better once you fit a decent ECU, as I doubt the ignition timing is ideal for a single. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted May 18, 2016 Share Posted May 18, 2016 I found this a useful video Quote Link to comment Share on other sites More sharing options...
berg Posted May 18, 2016 Share Posted May 18, 2016 Does seem a high amount of boost to run on a single and get those fuel readings on stock system What turbo is it? I know on precisions most people in the u.s run around 14psi max before it runs lean on stock fuel and ecu and they are mainly on 550cc injectors as appose to 440s Quote Link to comment Share on other sites More sharing options...
Milo500 Posted May 18, 2016 Author Share Posted May 18, 2016 It's a cheap and nasty Chinese 70ish mm turbo.... I have a new 82mm duel bb turbonetics turbo coming next week, am just using the crappy one (from previous owner) as a basis to see what it's running at... I have a 400lph fuel pump and 650cc injectors with an aem fic 8 piggyback going in very soon, but am at a loss at why it's reading that rich at 18 psi on a 70mm turbo... My best friend has a 92mm on his auto (originally twin) and is having the exact same thing with the same aem wideband....and that thing must be wacking out a huge amount of flow at 1.4bar. (I'm not boosting the car ever apart from getting that reading, so I obviously don't detonate the motor...before anyone says why have you not changed the ecu haha) The only thing I can think of is the (external) waste gate isn't working right with the greddy bc, as it feels only around 300bhp. Who knows, any help would be extremely appreciated haha. Cheers Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 18, 2016 Share Posted May 18, 2016 Trouble is nobody is going to know for sure just why its running as it is, its all just an educated guess, as you say its could be down to a bad WG or boost controller and its not running anything like that boost, or even because the turbine design is just not making that much air flow, but in any case if your not driving it on boost, its really just a moot point as its all going to be changed very soon, you just need to hope the previous owner didn't rag it big time and you have already got det damage to rings/ring lands. Quote Link to comment Share on other sites More sharing options...
Milo500 Posted May 21, 2016 Author Share Posted May 21, 2016 Trouble is nobody is going to know for sure just why its running as it is, its all just an educated guess, as you say its could be down to a bad WG or boost controller and its not running anything like that boost, or even because the turbine design is just not making that much air flow, but in any case if your not driving it on boost, its really just a moot point as its all going to be changed very soon, you just need to hope the previous owner didn't rag it big time and you have already got det damage to rings/ring lands. Pretty certain there isn't det damage as the engine runs beautifully...so will see how it runs when i'very changed the turbo next week, and will reply about it again then... Cheers guys Quote Link to comment Share on other sites More sharing options...
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