Cadillac Owners Forum banner

1 - 3 of 3 Posts

·
Registered
2011 CTS-V Coupe...
Joined
·
194 Posts
Discussion Starter #1
I'm definitely green on some of these talking points.....can use some help. full mods with heads/cam and all related pulleys, porting, headers...etc. What should be the air/flow mix to get the safest hp and not necessarily run lean to prop them up?? Hope I'm asking the question correctly...thanks
 

·
Registered
CTS-V
Joined
·
36 Posts
There is no simple answer to the safe Air/Fuel Ratio for a V question. Normally aspirated engines can be run safely around 12.7 AFR on gasoline (no alcohol added). Typically, boosted engines are tuned to a lower AFR number as the boost pressure increases.

Factory tunes are usually considered a little rich. A LS3 NA motor is set to ~1.21 Equivelancy Ratio during power enrichment. The LSA is set to
~1.32 ER. So you could conclude that the factory considers ~10% increase in PE fuel to be sufficient.
 

·
Registered
2011 CTS-V A6, 752 RWHP Stock airbox & stock exst
Joined
·
1,110 Posts
I'm running 11.8 AFR at WOT (winter blend gas) PE ratio is 1.24
 
1 - 3 of 3 Posts
Top