Any1 know, I think Vader was doing something but I haven't heard anything??

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89 RS

STILL Looking For:
87 IROC-Z28 350 TPI

 

The MAF's are capable of reading more than 255 gm/s. In fact at 4.71 VDC, they read 254 gm/s. They can send an output signal of over 5 VDC. You do the math.

The problem lies with the ECM, which can only accept a max. value of 255. Short of teaching an old ECM how to page or teaching a newer one to do MAF, both of which would require reprogramming the microcode, this limitation remains.

The practical solution would seem to be to fool the ECM into 'seeing' less airflow than actual. Which would also require lying about the injector flow rate and some other related factors.

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"The reasonable man adapts himself to the world.
The unreasonable one persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man"
--George Bernard Shaw.

 

There is a tool called translator from modern musclecars or ramchargers the device uses a lt1 maf and somehow fools the computer to read more air.BTW this is for a 3.8 turbo I feel sure that a device exists to do what you are looking for.

 

Not right now there isnt.

 

Dude, thats what I meant. I know the MAF can flow more than the ECM can read. I want to know how Vader's ECM fix is going.

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89 RS

STILL Looking For:
87 IROC-Z28 350 TPI

[This message has been edited by IROCZTWENTYGR8 (edited July 17, 2001).]

 

The one available for the TTA is allowing you to use a LS1 MAF because its larger. I still have to good old limitation, but its higher because the Turbo will suck a lot more air than a TPI will, or atleast that GM ever planned for one to.
WE don't fool the computer into thinking that its flowing more air, same amount, the translator just makes it so the TTA computer can read an LS1 signal. The larger less restrictive intak you have the less work the turbo has to do to spool up. This means more power sooner and a lot better times.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

Vader??

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89 RS

STILL Looking For:
An 87 IROC-Z28 350 TPI

 

how hard is it to convert to speed density?

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

If the MAF is capable of a 10volt or higher signal, what about putting a voltage divider between the MAF and ECM, so the ECM only sees half the actual MAF voltage, then programming the ECM to supply more fuel appropriate to the fact that it's only seeing half the voltage? I'm thinking something similar to what's done with the Speed Density ECMs when using a 2bar MAP for boosted applications. You lose some resolution, but the end result is still better for heavily modified applications.

 

I run the MAF Translaotr on my 89 TTA with a 3 inch LT1 MAF .....this is for s stock setup, if i would get the MAF extender chip for my car it would read over 255 in the vicinity of 512-520 or so....
But as was stated earlier, u will lose resolution when u do this, they ahve to break it down to fit in the format that the formerly 255 max code was......twice as much in one space and the resolution does go down, but not using this myself i cannot say
Others using this system swear by it and i may get one to find out for myself by the way the MAf Translator will work on TPI cars os u can ditch the crappy original mafs
later
jeremy


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LOOKING FOR FELLOW F-BODY ENTHUSIASTS TO START THIRDGEN CLUB IN NW IN AND FAR SOUTH CHICAGO SUBURBS , DROP ME A LINE IF INTERESTED OR POST ON THE MIDWEST BOARD

1989 Turbo Trans AM
100k and counting it breaks as fast as i wrench:-)
1991 Formula 350
daily beater with 45k
SLP catback
flowbooster
runners on order
MSD6
cold air kit
soon to be vortec headed,vortec intake, headers and cam etc
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