Newby that needs help deciding.

Reply Subscribe

Thread Tools

Search this Thread

10-28-2010, 02:15 PM

#101

kugzgt

5th Gear Member

Join Date: Jul 2009

Location: Lehigh Valley, PA

Posts: 2,472

ive been waiting for this....
http://www.youtube.com/watch?v=4W1Qp...eature=related

10-28-2010, 02:28 PM

#102

Blood

2nd Gear Member

Thread Starter

Join Date: Oct 2010

Location: Tx

Posts: 216

Ok you're just antagonizing it, which means you're acting on the same level as these guys by pushing the conversation on. Please quit.

10-28-2010, 02:33 PM

#103

WannaBeGearHead

Go Texas!!!

Join Date: Jul 2009

Location: Lincoln, NE

Posts: 4,613

Degreeing your cams means installing them at the advertised intake centerline. Just dropping them in can mean a lose of midrange torque because they are retarded or your intake valves making love with your pistons because they are to far advanced.

10-28-2010, 02:43 PM

#104

a_penquin

4th Gear Member

Join Date: Jul 2009

Location: GA

Posts: 1,022

Alright I cant find proof of the SN 4v GTs, I could have sworn my dad had one in his auto 98GT when he bought it back in 99-2000. My memory either fuzzed, or it was a swap by the prior owner. I love how everyone kept nagging this on though, feel free to do the hours of research I did sometime.

Thanks for explaining degreeing GearHead

10-28-2010, 03:51 PM

#105

amoosenamedhank

5th Gear Member

Join Date: Nov 2005

Location: MN

Posts: 4,412

Quote:

Originally Posted by a_penquin

The "ratings" ie 85mm, 90mm ex are the size of the tube, the MAF itself is basically a thin wire inside the tube. Bigger the tube, more airflow. Throttle bodies and plenums are measured in the same way.

The MAF takes a sampling of the air passing through the area (g/s is typical unit of mesasure) and from that reading determines a voltage, the maximum voltage being 5vs. The relation is set in a MAF table in the ECU which tells the ECU what the g/s range is per MAF voltage.

When you have reached the "flow" limit of the sensor, you increase the physical diameter of the tube to increase the amount of g/s per voltage the sensor can process. Then you would want to rescale your MAF tables to get your long term fuel trims (LTFT) back in line. That why the computer isn't constantly adding or subtracting large percentages of fuel.