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Old 03-16-2007, 01:41 AM   #1
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Default AFR Targets

Can people post their AFR target tables please and comment on mine (I'm just about to start tuning)

1990 1.6 MX5 T25 Turbo @ 5(ish)psi, standard injectors.
Thanks
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Old 03-16-2007, 01:48 AM   #2
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wouldnt you want it to be a bit leaner at idle? Just a thought.
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Old 03-16-2007, 03:33 AM   #3
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Originally Posted by akaryrye View Post
wouldnt you want it to be a bit leaner at idle? Just a thought.
i think that 14.6 or 14.7 is fine, thast what my goal is too.

you should make your 1000-4200 rpm at 15 kpa richer for cool poping noises lol.

i maybe suggest that dont hit 12 right at 120, you can slowly go into it maybe. you probably want 12 for higher boost

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Old 03-17-2007, 12:41 AM   #4
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To get a strong idle, I recommend a 13:1 AFR from 500 to 1500rpm. When you'll release the throttle, the idle won't drop low as 500, instead it will stuck at your idle setting target.

Here's one of my AFR target, it's running a bptGTR



As for the poping noise...enable the fuel over run setting, it will shut off the fuel while decelearing. You want the fuel off above 2000 rpm, and set your TPS raw adc, 2 number higher than a closed throtlle and below 20 of MAP
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Old 03-17-2007, 09:16 AM   #5
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Quote:
Originally Posted by mazdasly75 View Post
To get a strong idle, I recommend a 13:1 AFR from 500 to 1500rpm. When you'll release the throttle, the idle won't drop low as 500, instead it will stuck at your idle setting target.

Here's one of my AFR target, it's running a bptGTR



As for the poping noise...enable the fuel over run setting, it will shut off the fuel while decelearing. You want the fuel off above 2000 rpm, and set your TPS raw adc, 2 number higher than a closed throtlle and below 20 of MAP

the only problem with setting the idle to 13 in the UK is when MOT time comes you'll fail the test
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Old 03-17-2007, 06:02 PM   #6
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your right, at 13:1 you fail the emission test, but it takes 2 min to fix. So prepare your fuel map just before the test. Also for a better emission, retard your timing by 5 to 10 in the range of the test, it will raise the chance to pass.
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Old 03-18-2007, 11:29 AM   #7
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Quote:
Originally Posted by mazdasly75 View Post
your right, at 13:1 you fail the emission test, but it takes 2 min to fix. So prepare your fuel map just before the test. Also for a better emission, retard your timing by 5 to 10 in the range of the test, it will raise the chance to pass.
I'll give it a go
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