D-sta

iTrader: (6)

I have a Stillen High Flow Intake in my 1992 Maxima SE 5-speed and I feel at low rpm's i'm running too lean and wanted to know if a fuel pressure regulator would fix this? If anyone knows what are the effects of a fuel pressure regulator?

Thanks,
D-sta

Nismo87SE

Nope it wouldn't fix it at all. How do you know your running lean without a wide band o2 sensor? The thing to do is find a local dynojet center http://www.dynojet.com/lauto.shtml and have the car dynoed with the wide band o2 sensor. In the meantime try bumping the base timing to 19*BTDC http://www.geocities.com/craigbraceg...g/timing.html.

Bman

I think what you mean is you feel some low RPM power loss which is "normal" for a popcharger type intake. Unless you know something other than what you mentioned and this only started happening after you installed the intake, I wouldn't do anything about it..... also you should beware of giving advice on speculation BEFORE you know the answer (the Ram Air thread).

D-sta

iTrader: (6)

Hey Bman I said I think you might need a fuel pressure regulator. I didn't tell him that he did (the Ram Air thread).

nismo1989

low rpm power loss?? I had low rpm power GAIN on ever car I've ever put a pop charger on. I had both on an Accord DX (pop and CAI) and the CAI took power from the low rpms. Why would you have a power loss from an intake that is less restrictive and has no cumbersome bending tubing, just straight flow to the MAF?? Please let me know, becuase this defys all I have concluded about the things...

Jon91SE

Please refer to my post in the "CAI or Ram Air" thread......

nismo1989

... doesn't make sense to me.

poorcollegeboy

pop chargers take air from the engine bay which could be 30+ degrees hotter than air in the fender wall. it's been said that for every 10 degrees cooler the intake air is, you gain a 1% increase in HP. do a search for "denser air, colder air,...." and you will find the answers to your questions.

the long tubing also does have some effect to the performance. you can do a search on that too (cai tube/tubing) to find your answers. i recently posted a thread in the general maxima discussion focusing on just the tubing and how it affects performance a day or two ago.

nismo1989

I don't need to do a SEARCH on the gains from using various intakes. I can just do it as I have always done with cars for years. Engine types are a variable you are neglecting to take into consideration. I believe that is the reason for my misunderstanding, not being an idiot...

poorcollegeboy

hey man. i never called you an idiot. i'm just letting you know that it is a FACT that colder air is denser air and denser is more air.. yadda yadda. didn't mean to get you worked up. just trying to help your misunderstanding.