spiking boost? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissannick · 11-14-2012, 10:56 PM

so i need help, idk if its because of the cold weather , but my car is spiking boost a lot i believe. i have a 91 240sx with an sr20det , walbro 255 fuel pump, 60mm turbo on 13 lbs(at the moment), 550cc injectors. the car has a blow off valve on it at the moment but its not tuned for it , i believe its tuned for the recirc valve but i dont have one so my car runs rich and i have to ride the gear down to idle before i can put the clutch in, i doubt thats the problem considering when it was summer that wasnt a problem. now its getting colder out so my car is getting that extra 1 or 2 lbs of boost so i turned down the boost to 13 because it was at 15, idk whats going on lol. it just doesnt pull as hard because its spiking and if anyone could help me with some suggestions itd be much appreciated thanks

11-14-2012, 10:56 PM	#1
nissannick Join Date: Nov 2012 Location: NJ Age: 30 Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	spiking boost? so i need help, idk if its because of the cold weather , but my car is spiking boost a lot i believe. i have a 91 240sx with an sr20det , walbro 255 fuel pump, 60mm turbo on 13 lbs(at the moment), 550cc injectors. the car has a blow off valve on it at the moment but its not tuned for it , i believe its tuned for the recirc valve but i dont have one so my car runs rich and i have to ride the gear down to idle before i can put the clutch in, i doubt thats the problem considering when it was summer that wasnt a problem. now its getting colder out so my car is getting that extra 1 or 2 lbs of boost so i turned down the boost to 13 because it was at 15, idk whats going on lol. it just doesnt pull as hard because its spiking and if anyone could help me with some suggestions itd be much appreciated thanks