AFR Tuning - HELP
#18
Evolved Member
iTrader: (9)
Get that 12* at 6000RPM down to 11*, if your over 11.3 or more and get respective knock, then pull a little timing. For racefuel lean it out and add in boost.
Keep in mind most my exp is with methanol injection and not 93 only, so try it out to see if it works for you first. But your car looks like it's pulling hard on spool from the log, esp for only 19.5psi
#22
Evolved Member
iTrader: (9)
If you changed the intake then the MAF airflow signal is off putting you in lower load cells than stock and the resultant higher timing. But hten it looks like your airbox is stock, but good to know anways.
If you don't pull out the time the ecu will
If you don't pull out the time the ecu will
Last edited by C6C6CH3vo; Jul 26, 2007 at 07:40 PM.
#23
Evolved Member
iTrader: (30)
Yes. Alot of how your map looks depends on what mods you have (of course, right?) as much as what boost and AFR's you are running. Keeping the cells to within a couple of degrees of each other where the ECU doesnt have to do rapid interpolation and try to implement the changes in the same or less amount of time keeps the knock away.
JB
JB
#28
Evolving Member
iTrader: (1)
I would take out 1 degree from 3200 to 4500 and add a little fuel, maybe 0.3 units target richer. I would also take out enough fuel to get to stay between 11.5 and 11.2 up top. Finally I'd add timing in increments of 1 degree up top.
The consistent 1-2 KS @ 3200 -3700 is on the edge . On a hot day and repeated runs this will decay to 3-5 KS rapidly. Even quicker on poor gas. i'd make it a little safer.
Other points: double check for boost leaks, as load seems a little low. You might look at the one way PCV valve at the far end of the manifold. I've seen them cruddy enough so, under boost, they dont hold pressure properly. One symptom is a lazy boost onset.
I would also start my WOT runs at 2500 rpm...i'm guessing the knocksums will go down if you do. But id still take out the timing and richen it up
Milburn
The consistent 1-2 KS @ 3200 -3700 is on the edge . On a hot day and repeated runs this will decay to 3-5 KS rapidly. Even quicker on poor gas. i'd make it a little safer.
Other points: double check for boost leaks, as load seems a little low. You might look at the one way PCV valve at the far end of the manifold. I've seen them cruddy enough so, under boost, they dont hold pressure properly. One symptom is a lazy boost onset.
I would also start my WOT runs at 2500 rpm...i'm guessing the knocksums will go down if you do. But id still take out the timing and richen it up
Milburn
#29
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i hate to be off topic but i just got a reflash on my ecu from buschur..... i'll be installing an A/F autometer to make sure i'm safe. where can i learn about these ratio's and graphs? any good threads? also should i worry much about the mail in tune seems like they just guess what your car is going to be at.... i'm running upper ic, TBE, intake, walbro, mini battery, on stock boost.
thanks and sorry to be off topic maybe these guys can pm me instead of goin off topic. hey its a free bump :P
thanks and sorry to be off topic maybe these guys can pm me instead of goin off topic. hey its a free bump :P