bucking under boost/nitrous

[Burnett03]

Ya you guys figured i'd come back with nitrous problems.. My pistons are
still intact so don't to excited. My problems is WOT bucking/surging. The
nitrous comes on and hits fine until i get around 15-18lbs of boost then it
bucks and my 02's start to break up. I'm unsure if this is a jetting
problem, plugs, or wires. Car runs fine under boost at 20psi without the
nitrous, no bucking, no knock. When this bucking/surging occurs the 02's
break up and the car starts to knock. Maybe its bucking because of knock?
Im unsure. I'll pull the plugs tomorrow (brp7es at .028.) Maybe its time to
go to another colder step plug?

 

[Burnett03]

re-gapped them to .026 and no surging now

 

[ddavisaf]

Personally, I'd go with some 6's and keep the gap at .028.

 

[dsmtrance]

8's.

 

[92awddsm]

Personally, I'd go with some 6's and keep the gap at .028.

You dont run 6's in anything over 16-17 psi boost with an aftermarket turbo, especially with nitrous. The plug range is too hot and will cause detonation(knock)

As stated before, I would step up to 8's also. Gap aroung .026-.028. If it still bucks at .028, I would check condition of the coils.