I hope this is the right place for this but i've searched and only found one answer to my question but I need more before i take any action. I sprayed a 50 shot on my LS and after like a week the idle starts to surge from under 1000 to 1300 rpm. The idle does not surge when i start it up only after i drive it awhile. o0o and I want to bump up to a 75shot will it be safe on a stock b18b. Thanks

 

You might want to figure out why the idle is surging before you up the nitrous shot. Also, check the condition of the motor before spraying some more. A compression test and leak down should be a good start. LS motors shouldn't have any problems running a 75 wet shot.

 

I ran a 75shot dry on my ls swap with no problems, The surging is probably
not related to the nitrous but it could be a vacume leak or the fast idle sensor.
To check the fast idle sensor take off your intake and while it is surging take your
finger and plug the bottem hole inside your throtlebody, if your idle goes to normal
it's the fast idle if not check for vacume leak. Good luck

 

alright i try that tonite