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After 3 year of fighting lifter issues.I finally got around to rehooking my nitrous back up.
here my setup .I had it tuned 3 year ago on a 150 shot by BlueCat
anyway I was having trouble with tps wire and had to move it to the ascending (NW103 ) it was hooked up on descending side with the factory 90 throttle body.
here my setup
max 5 setup on AFR
stand alone with VP C 16 lnc 2000 for timing
ballenger 500 v2 wide band with NTK sensor range for 9.1 to 16.1 AFR
my ? is I’m going to post some pictures and ask if I’m close to having the lambda set right .just trying to do it myself.i did learn how to upload the firmware during this time.here we go
After doing some research Real Street video on a wideband 12.5 afr for NA @ wide open throttle which is .85 lambda (gas)
but for blower and turbos and on nitrous.75 thru.80 lambda @WOT
Turn off closed loop until the nitrous is dialed in. Once you have everything tight and have figured out where the motor wants to be AFR wise via plug reading/mph at the track/HP on a dyno, then use closed loop. We have found that it is best to use the closed loop as a safety instead of a tuning tool. This will help save you from chasing your tail and having your AFRs chasing themselves around.
Thanks Dave for the information about the close loop on tuning.
I know that all motors are not the same on AFR with nitrous?
but were do most of them hit on AFR on a good tune on the dyno?
we’re talking 150 shot with VP C25 117 octane (stand alone)and 8 degrees of timing pulled
the last time I had it tune,it was on conservative tune as far as the spark plugs
@ that time I was running a 364 cid now it a 450 cid
a dyno graph of the 364
Thanks Dave for the information about the close loop on tuning.
I know that all motors are not the same on AFR with nitrous?
but were do most of them hit on AFR on a good tune on the dyno?
we’re talking 150 shot with VP C25 117 octane (stand alone)and 8 degrees of timing pulled
the last time I had it tune,it was on conservative tune as far as the spark plugs
@ that time I was running a 364 cid now it a 450 cid
a dyno graph of the 364
That is definitely very very conservative. Usually for a 100-150 shot, people aim rich and end up between 11.5 and 12.0:1 (0.78-0.82 Lambda) on the gasoline scale. I can almost guarantee if you put some timing back in a degree at a time and lean it out a little bit at a time you will pick up power.
01-28-2023, 03:25 PM
What to shoot for on lambda 
