what is ideal for nitrous a/f ratio?

 

11 to 11.7 ish.

 

Perfect timing. I was just about to search for the same question !!

Thanks,
Brad

 

i heard if it is running too rich it will burn ring lands. 11 is safe not to burn these. A friend of mine runs a 150 shot on 10.8 A/F ratio.

 

Theres alot of factors but for 100-200 shot on stock ported heads and good gas 12.2-12.4 is safe. stay out of the 10's

 

az doesnt have good gas

psr wanted my af around 10.5 i swapped jets and moved it to 11.5. 11.5 is ideal

 

Your friend should be fine at that a/f - he could actually go to the mid 11's as Todd noted. 150 shot you want to worry more about going lean. I have never seen a car lift ring lands with a 150 shot but I have seen melted tips on plugs. Yes if you are running a 300 or 400 shot then all bets are off but most people are not running that size shot.

Dean

 

I shoot for a 11.8 on aversage size shots. When I get to the larger shots such as 250 pluss I shoot for 11.5

Dave

 

are these AFR number for DIRECT PORT WET SYSTEM ?
i mean people who use Plat system should do that ,, but when you use direct PORT
fogars for each Piston ( fuel + Nitrous )
do u have to do the same ?

 

My 150 tune takes me from 12.5 on motor to 11.5 all the way down the track with the hose flowing...plugs look good, runs like a champ, pretty good gains on the track also.