Boost bouncing back - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Sil-EightyNY · 06-02-2005, 10:59 PM

I have the stock turbo and a greddy profec B II and i drive on 7.5 psi everyday but do like to up it to 13 one in a blue moon. The only problem with upping the boost is that it does reach that point and bounces right back to 7.5????

Where is the problem? I want to up the boost at the track and keep it at 13 throughout the whole gear. And also is 8k degrees normal for cruising on the highway or is it too hot? Also, why is the oil pressure really high lige 6 at idle when the car is cold and when it warms up, the oil pressure is at .5 and that scares me. (not like on a honda). Is it my pump or is that normal??? Thanx
Tom

PS Its and SR20 black top S13

Rezlo · 06-03-2005, 01:47 AM

All cars oil pressure will drop once its warmed up because the oil becomes thinner with heat, .5 is a tiny bit low but normal never the less if the oil is at full temprature at idle.

Your dropping boost could be a variety of things, IE: restrictive exhaust, restrictive intake, incorect timing ectr, search for it many posts about it.

kandyflip445 · 06-03-2005, 02:10 AM

You would be dead if your car was running at 8000 degrees....

240SxTYLE · 06-04-2005, 05:44 PM

your boost is falling off cause incorrect tunning on your profec-b. I had the same problem, but after a little tinkering i got it right.... first thing to do is throw the greddy instructions away. there is a good site somewhere with a write up for 10lbs. and a 1-bar setting. I havent tried to up my boost or mess with it so i really cant tell you how to do it.. sorry

06-02-2005, 10:59 PM	#1
Sil-EightyNY Join Date: May 2005 Location: NY Age: 40 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	Boost bouncing back I have the stock turbo and a greddy profec B II and i drive on 7.5 psi everyday but do like to up it to 13 one in a blue moon. The only problem with upping the boost is that it does reach that point and bounces right back to 7.5???? Where is the problem? I want to up the boost at the track and keep it at 13 throughout the whole gear. And also is 8k degrees normal for cruising on the highway or is it too hot? Also, why is the oil pressure really high lige 6 at idle when the car is cold and when it warms up, the oil pressure is at .5 and that scares me. (not like on a honda). Is it my pump or is that normal??? Thanx Tom PS Its and SR20 black top S13

06-03-2005, 02:10 AM	#3
kandyflip445 Post Whore! Join Date: Sep 2002 Location: Arden, NC Age: 40 Posts: 4,460 Trader Rating: (1) Rides Gallery: kandyflip445 Feedback Score: 1 reviews	You would be dead if your car was running at 8000 degrees.... __________________ My 240 vBgarage

06-04-2005, 05:44 PM	#4
240SxTYLE Zilvia Member Join Date: Aug 2002 Location: orlando Posts: 290 Trader Rating: (0) Feedback Score: 0 reviews	your boost is falling off cause incorrect tunning on your profec-b. I had the same problem, but after a little tinkering i got it right.... first thing to do is throw the greddy instructions away. there is a good site somewhere with a write up for 10lbs. and a 1-bar setting. I havent tried to up my boost or mess with it so i really cant tell you how to do it.. sorry __________________ Second love First Love (my girl, not the honda)

06-03-2005, 01:47 AM	#2
Rezlo Zilvia Member Join Date: Jan 2005 Location: Chicago&South Africa Posts: 292 Trader Rating: (0) Feedback Score: 0 reviews	All cars oil pressure will drop once its warmed up because the oil becomes thinner with heat, .5 is a tiny bit low but normal never the less if the oil is at full temprature at idle. Your dropping boost could be a variety of things, IE: restrictive exhaust, restrictive intake, incorect timing ectr, search for it many posts about it.