 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 23, 2013 - 7:09 AM
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 Enthusiast Joined Feb 11, '08 From Auckland, New Zealand Currently Offline Reputation: 0 (0%) |
all you can really do is set the air/fuel ratios and let the stock ecu/knock sensor take care of the rest, with this situation i would aim for an even richer ratio, 11:1 under boost is for tuned fuel&ignition, in your case with excess advance you'll want to run richer to be on the safe side maybe even 10:5:1 under higher loads
-------------------- Mike W
1996 Toyota Celica ST205 GT-FOUR GT2860RS turbine, TiAL mvr44, JE 86.5φ piston, Clutchmasters FX400, APEX P-FC 269awhp / 273ft-lbs |
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 Thats guys. Running on 99 octane (UK RON)...not su... Jul 22, 2013 - 3:13 PM
Syaoran QUOTE (digs @ Jul 22, 2013 - 4:13 PM... Jul 22, 2013 - 9:30 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 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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