 3SFTE A/F Ratio advice |
 Jul 22, 2013 - 3:26 AM
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Enthusiast  Joined Aug 2, '11 From southampton Currently Offline Reputation: 0 (0%)  |
Hi, can I ask those who have had experience in this what kind of ratios they expect to see runnning their 5sfte or 3sftes?
I have a wideband, which fluctuates around 14.2 to 15.3 at idle, and 13.5 - 15.1/2 ish off boost runs. The AEM wideband gauge does continually fluctuate though, going through various ranges constantly. I did do boost run to see, and was measuring 12-13s on WOT. Only 2 runs as not sorted det cans yet so not monitoring detonation. No more boost runs till I work on that. This is using 295cc injectors, stock pressure. I do have 460cc injectors available too, as well as an afpr, and have emanage blue fitted. What is the expected values and also, should my wideband be CONSTANTLY fluctuating ? As I will have issues with street tuning as it is never on one value for long ? Or do you guys look for a range? Any experience would be gratefully received and listened to. This post has been edited by digs: Jul 22, 2013 - 3:27 AM |
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Jul 22, 2013 - 3:13 PM
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Enthusiast Joined Aug 2, '11 From southampton Currently Offline Reputation: 0 (0%) |
Thats guys. Running on 99 octane (UK RON)...not sure what your pump gas is normally, uk is 95 standard, so am only using our high octane equivalent. US use anti-knock rating I think, which is a bit lower value for the same effectiveness I think....maybe 94, when US pump gas is normally 87?? ?
UK fuel prices means this costs a bomb to fill up! - we pay over twice US price... Maybe worth fitting the adjustable fuel pressure regulator then, and up it a bit before going whole hog and trying the 460s? Really useful advice though, cheers guys! This post has been edited by digs: Jul 22, 2013 - 3:26 PM |
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Jul 22, 2013 - 9:30 PM
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 Enthusiast Joined Jan 4, '12 From US Currently Offline Reputation: 6 (100%) |
QUOTE (digs @ Jul 22, 2013 - 4:13 PM)  Thats guys. Running on 99 octane (UK RON)...not sure what your pump gas is normally, uk is 95 standard, so am only using our high octane equivalent. US use anti-knock rating I think, which is a bit lower value for the same effectiveness I think....maybe 94, when US pump gas is normally 87?? ? UK fuel prices means this costs a bomb to fill up! - we pay over twice US price... Maybe worth fitting the adjustable fuel pressure regulator then, and up it a bit before going whole hog and trying the 460s? Really useful advice though, cheers guys! You wont get much more fuel from the fpr, and it isnt recommended to do if you have the stock fuel pump. I'd install the 460cc injectors. BTW what are you tuning with? -------------------- 1993 Celica GT Coupe - sold
1994 Celica GT Liftback |
Posts in this topic
digs 3SFTE A/F Ratio advice Jul 22, 2013 - 3:26 AM
Smaay 12 is good, high 11s are better. 13s are lean for ... Jul 22, 2013 - 12:02 PM Syaoran Ideally you want anywhere from 11:1 to 11.5:1 AFR.... Jul 22, 2013 - 2:35 PM digs Have fitted a 255 lb fuel pump so have that side c... Jul 22, 2013 - 11:29 PM Syaoran Oh I see... that emanage will be your weak link.
... Jul 23, 2013 - 3:09 AM delusionz I think you should be using the adjustable fuel re... Jul 23, 2013 - 7:05 AM
Syaoran OP: Stop. I gotta say this again but your e-manage... Jul 23, 2013 - 1:54 PM digs QUOTE (Syaoran @ Jul 23, 2013 - 2:54... Jul 23, 2013 - 3:08 PM delusionz all you can really do is set the air/fuel ratios a... Jul 23, 2013 - 7:09 AM digs Thanks again for all the replies guy, really do ap... Jul 23, 2013 - 8:18 AM Syaoran I don't wanna sound condescending but it's... Jul 23, 2013 - 5:05 PM digs QUOTE (Syaoran @ Jul 23, 2013 - 6:05... Jul 24, 2013 - 4:37 AM delusionz ^-- not to mention standalone can monitor the fact... Jul 23, 2013 - 5:06 PM Smaay some piggy backs work just fine. Im not sure why e... Jul 24, 2013 - 9:09 AM Hafkai QUOTE (Smaay @ Jul 24, 2013 - 4:09 P... Jul 24, 2013 - 11:57 AM Syaoran QUOTE (Hafkai @ Jul 24, 2013 - 12:57... Jul 24, 2013 - 3:53 PM Hafkai Well, my e-Manage was able to retard and advance t... Jul 24, 2013 - 4:14 PM Syaoran QUOTE (Hafkai @ Jul 24, 2013 - 5:14 ... Jul 24, 2013 - 5:34 PM digs Hi, interesting debate
Could you clarify this ?
... Jul 25, 2013 - 12:52 AM Syaoran Intercepting the crank sensor is much more accurat... Jul 25, 2013 - 1:37 AM lagos Piggy backs will never give you a good tune becaus... Jul 25, 2013 - 9:28 PM digs Thanks guys
anyone know if these would fit out o... Aug 1, 2013 - 3:25 PM Syaoran They should with the correct seals. Aug 2, 2013 - 6:31 PM digs Ok, so I am understanding the issues now (I can li... Aug 13, 2013 - 2:53 PM Syaoran Bah, you already have a 3S-FE... all you really ne... Aug 16, 2013 - 10:19 AM digs QUOTE (Syaoran @ Aug 16, 2013 - 11:1... Aug 16, 2013 - 11:19 AM Syaoran That's the meat and potatoes of the deal... yo... Aug 16, 2013 - 3:50 PM |
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