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

http://i24.photobucket.com/albums/c4...s/P1020306.jpg




HP and Torque
http://i24.photobucket.com/albums/c4...s/P1020307.jpg

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. shit my b16 on 12 lbs im seeing close to 12.4 afr's on a cold night. ive even seen 12.6-12.7.

Re: Please advise on my AFR.
 

read the plugs and they will tell you what to do.
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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?

Re: Please advise on my AFR.
 

mapping will def show improvments. u can lean the a/f a bit and it will gain u some HP