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air fuel ratios 

 

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 Post subject: air fuel ratios
Posted: Sun Jun 01, 2008 3:48 am 
Getting Side Ways
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hi guys had my car on the dyno few days back knew she was feeling a little flat last run was 143 rwk this run was 140 rwk ino 3 kw so what but uno when uno your cars a little crook, anyway have the afr dyno sheet shes runnign pretty rick take a look

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Sun Jun 01, 2008 12:11 pm 
Fordmods Junkie
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lay off the crack!

3kw aint f**k all for different days

something is def wrong with the afrs

 

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Posted: Sun Jun 01, 2008 4:38 pm 
Getting Side Ways
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yeh ino that mate just more concerned about the afr then then power obviously from last run its lost some power guessing it coz of the ratio

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Tue Jun 03, 2008 10:34 pm 
Getting Side Ways
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Definately way out!


You'll end up glazing the bores if its too rich.

Should be around 12.8-13 continous for an NA set up . You might get a slight fluctuation with the BBM kicking in, but nothing like that.

 

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Because of Beer, Thirst is a Beautiful Thing!

'95 EF XR8 auto, Advance headers, 3" exhaust, Cobra manifold, BBK 75mm throttle body , 80MM Marauder MAF, Vortech V2 T Trim , 307 rwhp, 405 ft/lb 13.2 @ 105 MPH

Now N/A (permanent Lag) - AFR 165's, Comp XE270 cam, 1.6 RR - 269 rwhp 14.1 @ 102mph.

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Posted: Tue Jun 03, 2008 10:42 pm 
Getting Side Ways
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so what do we do is the question to get it back to were it shoudl be

suggestions

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Tue Jun 03, 2008 10:42 pm 
Getting Side Ways
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so what do we do is the question to get it back to were it shoudl be

suggestions

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Tue Jun 03, 2008 11:10 pm 
Getting Side Ways
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schnoods wrote:
Definately way out!


You'll end up glazing the bores if its too rich.



that is ridicules

at worst youve got 10.6 a/f

you could pick up a bit of power in the mid range...but your 12ish a/f for the rest of the range is about right....at best youll get another 5% which i doubt youll even notice and it help max power much, if at all

 

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Posted: Tue Jun 03, 2008 11:14 pm 
Getting Side Ways
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yeh just need to get it right dont want to be wasting fuel for no reason and yeh feels a little fat in the middle

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Tue Jun 03, 2008 11:52 pm 
Getting Side Ways
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it shows as well.

I'd be checking oxy sensors first though, power wise it wont pick up too much, but it'd be nice to see the torque curve, I assume it would be pretty flat in the mid range.

 

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Because of Beer, Thirst is a Beautiful Thing!

'95 EF XR8 auto, Advance headers, 3" exhaust, Cobra manifold, BBK 75mm throttle body , 80MM Marauder MAF, Vortech V2 T Trim , 307 rwhp, 405 ft/lb 13.2 @ 105 MPH

Now N/A (permanent Lag) - AFR 165's, Comp XE270 cam, 1.6 RR - 269 rwhp 14.1 @ 102mph.

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Posted: Wed Jun 04, 2008 12:00 am 
Getting Side Ways
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Power: 229 rwkw

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gogetta wrote:
schnoods wrote:
Definately way out!


You'll end up glazing the bores if its too rich.



that is ridicules

at worst youve got 10.6 a/f

you could pick up a bit of power in the mid range...but your 12ish a/f for the rest of the range is about right....at best youll get another 5% which i doubt youll even notice and it help max power much, if at all



At worst 10.6? Im sure there arent many people here that run 10.6 AFR ratio's here, not even the turbo boys.

Stoich is around 14 :1 , high comp clevo boys run theres 13-13.5, turbo boys at full boost see there drop to 12-11.7 : 1.

10.6 especially in the midrange is a waste of fuel and surely would be noticable.

 

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Because of Beer, Thirst is a Beautiful Thing!

'95 EF XR8 auto, Advance headers, 3" exhaust, Cobra manifold, BBK 75mm throttle body , 80MM Marauder MAF, Vortech V2 T Trim , 307 rwhp, 405 ft/lb 13.2 @ 105 MPH

Now N/A (permanent Lag) - AFR 165's, Comp XE270 cam, 1.6 RR - 269 rwhp 14.1 @ 102mph.

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 Post subject: this is the torque curve
Posted: Wed Jun 04, 2008 12:08 am 
Getting Side Ways
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finally got it to download but yeh see if this helps

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Wed Jun 04, 2008 12:10 am 
Getting Side Ways
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just replaced o2 sensor gonna maybe jump on the dyno again on sat see if anythings changed

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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Posted: Tue Aug 05, 2008 10:16 am 
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my advice, get rid of the chiptorque give yourself some timing at the dizzy and let your standard ecu relearn itself for a couple of days, then throw it back on the dyno, i bet your afrs improve and you gain power, you have nothing to loose...

i had the same experience with a chiptorque, im running a cms stage 3 cam, bigger profile than yours. still on standard ecu and my AFRs are also rich, but not as rich as yours, mid-low 11s when the BBM switches is the richest, i have a flat curve of 400nm till redline nearly, and make 145 -160 rwkw depending on the dyno...

 

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Posted: Tue Aug 05, 2008 11:35 am 
Getting Side Ways
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^^ again with the Chiptorque bashing? :?

I had a custom tune done at Chiptorque a couple weeks ago to tune the car after fitting a new cam and left their happy.

In an untuned state, i had black smoke bellowing out the exhaust, nice pile of soot in the driveway. Car wouldnt barely idle and had a dreaded rev hang issue which plauged me since i converted to manual, which manual ecu nor proper wiring could fix

Now AFR's are good and idle is perfect. And best of all NO MORE REV HANG woohoo... I would like the afr's closer to 12.7 but im happy with their work. Graph below your looking at the blue lines was my last tune. Red line is an older tune i did with another cam they put for comparision

Basically why knock their work or their product when they clearly have benefits ?

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Posted: Tue Aug 05, 2008 11:43 am 
Oompa Loompa
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as i said before, i put one of them on my car so i am talking from experience! and the car went backwards, it was not a custom dyno tune though, it was a tune designed to run with the cam specs and dyno graphs that i supplied to their head office...

 

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CMS stage 3 cam, CMS stage 2 head, intake, extractors, exhaust...
standard bottom end, standard ECU
14.3 @ 96mph

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