Had the car dyno tuned for the happy gas last year, it ran really well at the track and I ended up putting two 10 lb bottles through it with no issues.. Plugs look great so I am not going to mess much with it.. I never really questioned my dyno numbers but curious what you guys think.

First pull was with the converter unlocked (performabuilt 4k), second run was with the 75 pills unlocked, and third run was with the 125 pills unlocked.. I ended up throwing the 175 pills in over the winter when the car was just sitting but do you think I should re-tune for that before spraying?? He said my tune was really safe for the nitrous so I was thinking I can get away with the larger shot and still be ok since he left me some "cushion"..

Car is an 02 with 74k miles, stock 4L60E with shift kit and stall, 3:42 rear, lid, headers, ory, exhuast.. Just normal bolt ons..

 

How are you pulling timing?

If your using a controller you shouldn't have to get a "re-tune" as you can read the plugs and adjust timing and the fuel jet accordingly

If your tuner just left the N20 tune in the car than yes you'll have to have him take a few degrees of timing out of it for the additional 50hp.

 

He ran a wire to the pcm which is on a relay, when I flip my arming switch it pulls 6* of timing. Then I turn the arming switch off and go back to normal bolt on tune timing

 

6* is good for 150hp & some get away with 1.5* per 50hp

 

OP was this done on a mustang dyno? also is it a dry or wet system?

 

No it was a DynoJet dyno and its a wet shot.