Speed Density vs Mass Air Flow

[motrctyman]

I'm a noob about to get a camaro. I'm considering LT1s for budget reasons and debating what yrs are best. I read the following posted from speeddensity.com:

"In 1993, the computer was run via Speed Density, which measured engine speed (RPM) and load (MAP in kPa) to compute airflow requirements and then use that against the VE table to get the proper fueling for conditions. An IAT (Intake Air Temperature sensor) was also used as air density changes with temperature. In 1994 however, the computer logic was changed over to a Mass Air Flow system."

Question: Is this a good enough reason to get a 94+ LT1 (or not a 93)? TIA

[MattODoom]

Ahh thats such a loaded question! Heres the deal: the 93 LT1 is a MAP system, which is easier to tune (coming from a TPI guy). There is literally no guides or anything for MAF TPIs but there is buttloads for MAP. ALSO 1993 was the only lt1 that is an OBDI system, the kind you burn chips for. 94+ are OBDII pain-in-the-ass type PCMs (not ECM's). It is also interesting to note that while the 94+ LT1s are MAF type, they also carry a MAP sensor and can fall back to the MAP readings in event of MAF failure.

Also, the 1993 LT1 uses a 700R4 trans which as you know is controlled by a TV cable. 1994 saw the oncoming of the 4L60E which is of course electronicly shifted. If you are willing to learn the OBDII programming then it might be worth it as you can program shift points, etc. Also the PCM has flash memory in it I believe, so you dont have to physicaly burn chips and take them in and out.

Personally im an OBDI guy, but thats because there was no OBDII TPI's.

[93formulalt1]

My 94 V6 is a OBDI car, I know that virtually nothing changed between 93 & 94 for the V6 cars, but the V8 cars went through several changes. I prefer OBDI also, it's a lot simpler to tune. OBDII was mostly more convenient for diagnosing problems, but you just about had to have a degree in computer programming to tune anything on it. lol

[99SSRhodes]

94+ thats all I'm going to say


lol