Please advise on my AFR.
#1
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Please advise on my AFR.
Got my car on a rolling road last weekend. Made reasonable power- 169.5bhp on a dyno dynamic roller (which i gather read a touch low)
Was hoping for a touch more. Got a print out of the AFR and it looks a little, er, lumpy to me!
Spec is
120,000 mile b16a2 block
Fujitsubo B18 manifold (4-2-1)
Sports cat
Tanabe 60mm Hyper Medallion exhaust
Mugen airbox
Ignition timing at 18 deg BTDC
Cam timing advanced 2 deg at inlet and retarded 2 deg on exhaust using skunk2 cam gears (might be other way around-!?)
Stock 99 si ecu
Can anyone advise on whether this would benefit from some mapping?
Can anyone talk me through what the graph is telling me?
AFR
HP and Torque
Was hoping for a touch more. Got a print out of the AFR and it looks a little, er, lumpy to me!
Spec is
120,000 mile b16a2 block
Fujitsubo B18 manifold (4-2-1)
Sports cat
Tanabe 60mm Hyper Medallion exhaust
Mugen airbox
Ignition timing at 18 deg BTDC
Cam timing advanced 2 deg at inlet and retarded 2 deg on exhaust using skunk2 cam gears (might be other way around-!?)
Stock 99 si ecu
Can anyone advise on whether this would benefit from some mapping?
Can anyone talk me through what the graph is telling me?
AFR
HP and Torque
#2
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Re: Please advise on my AFR.
nice. looks like the range is 12.4-12.8. which isnt that bad. pretty conservative. you could lean it out quite a bit more to make up for lost power. **** my b16 on 12 lbs im seeing close to 12.4 afr's on a cold night. ive even seen 12.6-12.7.
#3
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Re: Please advise on my AFR.
Last edited by q16racer; 03-13-2011 at 04:14 PM.
#4
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Re: Please advise on my AFR.
The plugs are all fine but the afr varies across the load/rev range. Surely its about making the AFR right at as many load sites as possible..? No?
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