Im running a little rich up top 6k on Will leaning it out about .5 yield anymore hp. Im currently around 350whp

 

it depends, there is a wide field where going up or down does very little,- IF you are in the middle. if you are fatfatfat leaning out will help. I would guess 11.3, a half point either way won't show up on the graph.
Timing on the other hand is a different story.

 

What are your mods BoostWhore?

 

10.5 hotside
tubular 02 housing
3in buschur tb w/ magnaflow
buschur intake pipe and filter
GSC 264 cams
MBC 22psi
Custom dynoflash - superafc2 for fine tuning
fuelpump
peakboost fmic
2.5 lower ic pipe
aps bov

by the way im seeing 10.8- 10.6 6k on im wondering if its worth leaning out some. I need to get a datalogger to make sure i am getting full timing. I hav ea obd2 scanner the best timing i can see on it is around 18 but there delayed and its hard to watch it b/ it wont log it for me

 

wow...that rich at redline? I would say leaning it a whole point. Should be safe to run 11's in the AFR. Mine always were 11.8-12.0. There was a significant increase from a mid 10 AFR to 11 something....

Kris

 

on the street personally I would go no higher than 11.5 afr.. Every day is not the same and I would rather be safe than sorry. The gain is so minimal compared to what you will lose if motor blows. So just keep that in mind when going 12.0 afr unless maybe you on race gas

 

I would suggest going to 11.1 - 11.3 and see if the car is holding steady timing at that ratio

It should be worth at least 10 whp to lean it out that much in that area of the map

I would not go leaner than 11.3 on a street car on pump gas