JapCarForum Car Manufacturers Lexus/Toyota IS200 / IS300 / SPORTCROSS / Altezza Supercharging & Turbo Modifications couple of AFR and AFR Gauge related questions

couple of AFR and AFR Gauge related questions

couple of AFR and AFR Gauge related questions

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S
Banned
1,153
29-06-2019, 02:19 PM
#1
Hello all,

I've recently fitted an AEM AFR gauge and boost gauge.

I took it out for its first drive since and I was wondering if an AFR of 13-14's at WOT is ok? Or is that too lean?

Should I be worried? (bearing in mind I've been running the car like this for months and I've only just fitted an AFR gauge)

When cruising with very little throttle its showing 11-12's is this OK? And at middle-ish throttle the AFRs seem to go all over the place but I'm guessing that's because there is no real "map" to speak of.

Last question is the boost gauge seems to show a lot of vacuum at idle? Like 20 mhg (or whatever the measurement is!)

Any help is greatly appreciated!

Stix!
S
29-06-2019, 02:19 PM #1

Hello all,

I've recently fitted an AEM AFR gauge and boost gauge.

I took it out for its first drive since and I was wondering if an AFR of 13-14's at WOT is ok? Or is that too lean?

Should I be worried? (bearing in mind I've been running the car like this for months and I've only just fitted an AFR gauge)

When cruising with very little throttle its showing 11-12's is this OK? And at middle-ish throttle the AFRs seem to go all over the place but I'm guessing that's because there is no real "map" to speak of.

Last question is the boost gauge seems to show a lot of vacuum at idle? Like 20 mhg (or whatever the measurement is!)

Any help is greatly appreciated!

Stix!

Sparkystav
Administrator
14,683
30-06-2019, 12:33 AM
#2
11-12 when cruising on light throttle is too rich, should be about 14-15 at that point.

13-14 isnt terrible at full throttle, should be a little richer but will be fine.


as for the boost gauge do you mean 20 cmhg? if so its fine, should go lower when lifting off throttle.

OutlawJapClub Admin Team
Sparkystav
30-06-2019, 12:33 AM #2

11-12 when cruising on light throttle is too rich, should be about 14-15 at that point.

13-14 isnt terrible at full throttle, should be a little richer but will be fine.


as for the boost gauge do you mean 20 cmhg? if so its fine, should go lower when lifting off throttle.


OutlawJapClub Admin Team

S
Banned
1,153
30-06-2019, 01:07 AM
#3
That's a weight off my mind Smile

I knew it was running rich somewhere in the rev range because you can smell it!

I'm going to have to buy an AFR option gauge for the Greddy so I can setup the auto tune! Lol
S
30-06-2019, 01:07 AM #3

That's a weight off my mind Smile

I knew it was running rich somewhere in the rev range because you can smell it!

I'm going to have to buy an AFR option gauge for the Greddy so I can setup the auto tune! Lol

Sparkystav
Administrator
14,683
30-06-2019, 02:08 AM
#4
Buy a what?

Afaik the greddy has an input plug for map sensor etc doesn't it? Think it's the 2 outside wires. One needs earth one the 0-5v output from the aem.

OutlawJapClub Admin Team
Sparkystav
30-06-2019, 02:08 AM #4

Buy a what?

Afaik the greddy has an input plug for map sensor etc doesn't it? Think it's the 2 outside wires. One needs earth one the 0-5v output from the aem.


OutlawJapClub Admin Team

S
Banned
1,153
30-06-2019, 02:31 AM
#5
There is an option cable so you can wire the AFR gauge to the Emanage so you can set the Emanage to auto tune to a specific AFR figure.

That's the one Stav - only problem is no one in the UK stocks it.
S
30-06-2019, 02:31 AM #5

There is an option cable so you can wire the AFR gauge to the Emanage so you can set the Emanage to auto tune to a specific AFR figure.

That's the one Stav - only problem is no one in the UK stocks it.

Sparkystav
Administrator
14,683
30-06-2019, 04:03 AM
#6
Just open the ecu and solder wires to the pins the plug connects to. Much cheaper option.

OutlawJapClub Admin Team
Sparkystav
30-06-2019, 04:03 AM #6

Just open the ecu and solder wires to the pins the plug connects to. Much cheaper option.


OutlawJapClub Admin Team

S
Banned
1,153
30-06-2019, 05:08 AM
#7
That's a tempting option but for the £30 for the cable I think I'd rather pay that and not mess it up because knowing my luck I'd end up making a right mess of it!
S
30-06-2019, 05:08 AM #7

That's a tempting option but for the £30 for the cable I think I'd rather pay that and not mess it up because knowing my luck I'd end up making a right mess of it!

Sparkystav
Administrator
14,683
30-06-2019, 06:34 AM
#8
£30 for a plug and 2 wires though. each to their own i suppose lol

OutlawJapClub Admin Team
Sparkystav
30-06-2019, 06:34 AM #8

£30 for a plug and 2 wires though. each to their own i suppose lol


OutlawJapClub Admin Team

S
Banned
1,153
30-06-2019, 06:53 AM
#9
Haha I know mate!

I just know that if I soldered it I'd probably knacker the entire unit!

I'm going to see if I can find a plug anywhere else first so I can make my own!
S
30-06-2019, 06:53 AM #9

Haha I know mate!

I just know that if I soldered it I'd probably knacker the entire unit!

I'm going to see if I can find a plug anywhere else first so I can make my own!

S
Banned
1,153
30-06-2019, 09:20 AM
#10
I ****** love google!

I've found you can use a cable that connects a PC's cd drive to its sound card! Yes!
S
30-06-2019, 09:20 AM #10

I ****** love google!

I've found you can use a cable that connects a PC's cd drive to its sound card! Yes!

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