stand alone engine managment for N/A engine?

Reply Subscribe

Thread Tools

Search this Thread

09-23-2003, 07:06 PM

IllNastyImpreza

Guest

Posts: n/a

stand alone engine managment for N/A engine?

I drive a 98 RS, and NO ONE makes an intake for my car. So I am forced to fabricate my own. Therefore I will need some type of MAF/computer upgrade. I have thought about getting a apexi SAFC. but I Figure if im gona spend the money on a piggyback computer to monitor my custom intake (ram air straight under the hoodscoop) that I might as well get something that I can fiddle with other engine specs(RPM , redline, etc)

anyone know if getting a SAEM would be worth it for a 98 RS, being naturaly aspired? and if ANYONE makes one? and maybee even an intake ? =)

09-23-2003, 08:02 PM

Jgrahn555

Sarcastic Jackass

Join Date: Dec 2002

Location: Western Washington

Posts: 622

Car Info: i drive a beater

how long have you owned your impreza?

09-24-2003, 01:19 AM

Kevin M

Registered User

iTrader: (12)

Join Date: Nov 2002

Location: Reno, NV

Posts: 18,369

Car Info: 1993/2000/2001 GF4 mostly red

The SAFC is enough to manage the intake. The ECU will try to advance timing on its own.

09-25-2003, 04:46 PM

IllNastyImpreza

Guest

Posts: n/a

owned

I Bought it little more then 2 years ago with 28,000 mi. Now i got 42,000.

so with the adition of a cold air intake, the computer will try to advance timing?why? does the MAF sensor incorectly measure the airflow coming into the engine due to the change in incoming air temperaturre? I know that the MAF sensor is a wire that is heated to a certain temperature. And it measures the incoming air flow by how much it is cooled off. So colder air would cool it off more correct? and the apexi SAFC fixes this how? =)

Last edited by IllNastyImpreza; 09-25-2003 at 04:48 PM.

09-25-2003, 05:31 PM

Kevin M

Registered User

iTrader: (12)

Join Date: Nov 2002

Location: Reno, NV

Posts: 18,369

Car Info: 1993/2000/2001 GF4 mostly red

The ECU is always trying to advance timing. It backs off when it detects knock or poor AF ratio.

09-25-2003, 06:31 PM

IllNastyImpreza

Guest

Posts: n/a

so with more air coming into the engine , the engine NEEDS to advance timing?

09-29-2003, 08:06 PM

ilmaestro

Registered User

iTrader: (1)

Join Date: Nov 2002

Location: Folsom, CA

Posts: 639

Car Info: 98RS - Pretty Blue

Re: stand alone engine managment for N/A engine?

Quote:

Originally posted by IllNastyImpreza
I drive a 98 RS, and NO ONE makes an intake for my car. So I am forced to fabricate my own. Therefore I will need some type of MAF/computer upgrade. I have thought about getting a apexi SAFC. but I Figure if im gona spend the money on a piggyback computer to monitor my custom intake (ram air straight under the hoodscoop) that I might as well get something that I can fiddle with other engine specs(RPM , redline, etc)

anyone know if getting a SAEM would be worth it for a 98 RS, being naturaly aspired? and if ANYONE makes one? and maybee even an intake ? =)

Just an FYI, Injen makes a Cold Air Intake for our cars (98-99) that I have read is VERY similar in performance to the Cobb intakes for 00-01 cars. After waiting on Cobb for over a year and a half, I decided to buy the Injen intake (last week) only to get a killer deal on a turbo setup a few days ago, so I no longer needed the intake before it even arrived at my house (it's still brand new). If you are interested, you can check it out in the FS forum.

good luck,
jonathan