123tom123tom Posted October 15, 2008 Share Posted October 15, 2008 I am waiting for my 650 injectors which have been coming from japan for ages. The car is running at the minute almost perfect idle A/F's jumps between 14.7 and 15.0 when warm. My question is can i still drive the car on no boost/low boost as long as the A/Fs are ok when doing so. I took it up the street to day to get things moving on the car as they have been stood and the A/Fs on just driving normal where mid 14's to 15 which is ok right. p.s dont slate me I am just ask =ing on the basis of what i have told you regarding the A/F ratio's Quote Link to comment Share on other sites More sharing options...
Homer Posted October 15, 2008 Share Posted October 15, 2008 If you are careful to only use low boost (talking I drove mine around the town quite a few times with the 440's in and it was fine on the afr's. Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 15, 2008 Author Share Posted October 15, 2008 If you are careful to only use low boost (talking I drove mine around the town quite a few times with the 440's in and it was fine on the afr's. cheers oricle of knowledge cant wait now just to drive it other than 50yard up the street. Am a bit giddy now lol:) Quote Link to comment Share on other sites More sharing options...
Homer Posted October 15, 2008 Share Posted October 15, 2008 A vid of it running on 440's: http://uk.youtube.com/watch?v=unao_oyQWEA It was fine, low boost, short shifting and still a bit rich Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 15, 2008 Share Posted October 15, 2008 14s to 15s on the afr , i thaught i was a bit lean on 13-13.5, i get told so many different things. what would you recomment as a good mix at idle off boost easy driving through to full throttle ? Quote Link to comment Share on other sites More sharing options...
Jazzy Posted October 15, 2008 Share Posted October 15, 2008 idle / cruise should be 14.7 dropping to mid 11's at WOT Quote Link to comment Share on other sites More sharing options...
Homer Posted October 15, 2008 Share Posted October 15, 2008 14s to 15s on the afr , i thaught i was a bit lean on 13-13.5, i get told so many different things. what would you recomment as a good mix at idle off boost easy driving through to full throttle ? At idle and off boost 14-15 is normal. With boost it's vastly more complex. At a WOT throttle with run 11.7 is generally considered a 'safe' level, though more is possible if you want to push things. It's very complex and not something I understand anywhere near well enough to explain. You'd be best off talking to a mapper to get a general idea. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 15, 2008 Share Posted October 15, 2008 so staying in the 11s on WOT shouldnt cause my to melt any internals Quote Link to comment Share on other sites More sharing options...
little num Posted October 15, 2008 Share Posted October 15, 2008 so staying in the 11s on WOT shouldnt cause my to melt any internals thats right 10s - 11's are good on full chat more fuel more cooling, but to much fuel can be bad as well i have a uk spec and they are prone to over fueling because they have 550cc injectors installed from toyota, i will normally see around the late 10s and early 11's and im running 1.3 most days, i also have a EGT gauge and the more fuel i see the less the EGT's are, on a good blast in 6th i will see EGT's no higher then 850 this i am told is safe as i have my probe in the exhaust manifold right on cyclinder 1. Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 16, 2008 Author Share Posted October 16, 2008 A vid of it running on 440's: http://uk.youtube.com/watch?v=unao_oyQWEA It was fine, low boost, short shifting and still a bit rich sounds nice there and looks to perform quite well even with the 440's, what boost was you running then, it sounded like a lot more than the 0.6 bar you recommend, or is that just the noise a single turbo makes at that kind of boost. quick question, proper dumb one at that, but you know the waste gate size ie 30mm 40mm etc where does that size come from. Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 16, 2008 Author Share Posted October 16, 2008 question bump:) Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted October 16, 2008 Share Posted October 16, 2008 wouldn't drive it on boost at all if it were me. Not until the bigger injectors were fitted Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 16, 2008 Author Share Posted October 16, 2008 wouldn't drive it on boost at all if it were me. Not until the bigger injectors were fitted have you watched the vid that homer posted, sounds fine and the info he gave made sense, ideally i know it shouldnt be drove, but what is the harm if the afr's are ok. That is the main thing at the end of the day, in regards to detination etc. Or am i way off;) Quote Link to comment Share on other sites More sharing options...
Homer Posted October 16, 2008 Share Posted October 16, 2008 It was low boost (less than 0.5 bar in the first two gears), it sounds like much more because the wastegate is fully open so early on. It gets much quieter once boost is raised as the wastegate doesn't open until MUCH later in the rev range. It's externally vented and I had the windows open so it sounds and looks far quicker/agresive than it actually was. Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 16, 2008 Author Share Posted October 16, 2008 It was low boost (less than 0.5 bar in the first two gears), it sounds like much more because the wastegate is fully open so early on. It gets much quieter once boost is raised as the wastegate doesn't open until MUCH later in the rev range. It's externally vented and I had the windows open so it sounds and looks far quicker/agresive than it actually was. thats why it sound agressive then, well thats that then, any help in regards to the size thing i was on about:) Quote Link to comment Share on other sites More sharing options...
Homer Posted October 16, 2008 Share Posted October 16, 2008 thats why it sound agressive then, well thats that then, any help in regards to the size thing i was on about:) It's the diameter of the entry hole into the wastgate (sorry, can't think of a better way to explain it ) Quote Link to comment Share on other sites More sharing options...
123tom123tom Posted October 16, 2008 Author Share Posted October 16, 2008 It's the diameter of the entry hole into the wastgate (sorry, can't think of a better way to explain it ) cheers thats fine mate. Quote Link to comment Share on other sites More sharing options...
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