Mat & Maf

[gofstbuick]

What is the relationship between the MAF and MAT? I just built a cold air kit and am wondering if I should relocate the MAT near the cone air filter (now sits between the headlights and core support) or leave it near the MAF.
TIA

 

[GN ERGY]

There are a lot of opinions on this, but where you have it will work just fine.
Just my 2 cents, But hey what do I know???
Bruce has his mounted in his Plenum, Hey Bruce, how about an experts 2 cents.
Tarey D.

 

[750H.P.V6]

gofst,

In the stock chip tables there are 2 which are based on MAT inputs. One table is a spark correction table vs inlet temp which GM opted not to use in our application and the 2nd table is a MAF correction table vs inlet temp.

If you're still running an OEM MAF then the MAT sensor input is valid. If you are running a LT1 or LS1 MAF then it probably isn't. If you have the MAT sensor in the inlet tract I wouldn't think location will make a difference. If you move it to the plenum it's a different story.

If any of this is out of context I'm sure Bruce will correct me.

Good Luck

Neal

 

[gofstbuick]

Originally posted by 750H.P.V6
gofst,

In the stock chip tables there are 2 which are based on MAT inputs. One table is a spark correction table vs inlet temp which GM opted not to use in our application and the 2nd table is a MAF correction table vs inlet temp.

If you're still running an OEM MAF then the MAT sensor input is valid. If you are running a LT1 or LS1 MAF then it probably isn't. If you have the MAT sensor in the inlet tract I wouldn't think location will make a difference. If you move it to the plenum it's a different story.

If any of this is out of context I'm sure Bruce will correct me.

Good Luck

Neal

Neal,
Thanks. I am using the stock MAF (cross my fingers, still running strong for the last 5 years). The new cold air kit is made from a 45* 4 inch aluminized steel tube, coupled to a 90* 4 inch steel tube. I was also wondering if the MAT mounted on the steel tube would be more or less accurate than mounted in the rubber collar of the k&n cone filter. Another option is to locate the MAT in the rubber hose that couples the tubes together.

 

[gofstbuick]

By the way, my hat goes off to BuickGNBoosted, because after piecing togther all the parts for my cold air kit, his is very reasonably priced and he's done all the research. I probably duplicated his research in creating my homemade unit. Additionally, it was very tight turning the 4 inch 90* steel elbow betwen the core support and headlight bucket. So again, kudos to BuickGNBoosted.

 

[bruce]

To be accurate, the stock sensor on the Turbo Buicks is a IAT sensor. Intake Air Temperature, it is the air temp being sensed at the Intake tract.

The MAF is a devise that calculates the air flow into the engine, ie the MASS of air being injected. In order to make that calculation, it needs to know the Intake Air Temp.. As long as the sensor is seeing about the same air as the air filter, your fine.

If at some point you start doing your own chips, and want to get more exacting in your tuning, then you'd relocate the IAT into the plenum, and then use it as a true MANIFOLD AIR TEMP
sensor. BUt, it requires using a Translator, and late MAF, and some tuning to take full advantage of it.
Bruce


==================
----- Original Message -----
From: "GN/T-Type Discussion Board" <gnttype-board@gnttype.org>
> By Joseph Cheung (Jcheung) on Tuesday, March 04, 2003 -
> 09:03 am:
> What is the relationship between the MAF and MAT? I just
> built a cold air kit and am wondering if I should relocate
> the MAT in the collar of the cone air filter (which sits
> between the headlights and core support) or position it near
> the MAF.
==================

 

[gofstbuick]

Bruce,
Thanks for the quick and accurate response.