I can get a hold of a wiring harness and computer(MAF) from my sisters smashed formula bird. Will this cause me trouble blowing through the MAF with 2 T3 Turbos? I did a quick search and read something about it maxing out the MAF. What does this mean? Will I run into driveability problems? Also someone posted that it will blow the MAF into peices but I have Maxium Boost(pg 195) and it shows a supercharger blowing through a MAF on TPI motor?

If someone can help me or point me in the right direction it would be much apreciated.

 

NM I found my answer on the prom board.

 

I know you said you found your answers, but I figured I'd let you know some first hand experience. I'm running a supercharger on my 89 Formula. It does blow through the MAF sensor. I max out the MAF by 3200 rpms. What I had to do was manually add fuel via burning a new chip. The downfall to this is when the temperature changes, the computer doesn't have the ability to compensate for it. So on cool nights at the track, I have to add a little more fuel to keep the car from leaning out.

 

Do you run a FMU?

 

I have the FMU hooked up, but I have it set to its lowest setting. I use the computer to add the extra fuel. When it gets cooler out, I turn the FMU up just a touch.

 

I was told when you have prom made by say tpis. when you floor the car it no longer uses the mas it goes from a set reading burned into the prom is this correct?

 

Thats not correct. The computer no longer uses the oxygen sensor readings to adjust the fuel mixture, but it most certainly does use the MAF sensor. The computer uses predetermined values as far as what air to fuel ratio it wants, but it still needs to know how much incoming air there is. With a turbo or blower you reach the maximum value that the MAF can report. Once at that point, the computer can no longer accurately add fuel since it really doesn't know how much air is being taken in. To make up for this, you can either run a FMU or a custom PROM. I didn't like the FMU because it puts a lot of strain on the entire fuel system. At max boost, I was getting around 90 psi fuel pressure. I ruptured a fuel line at the track, and have damaged the diaphram on two regulators due to excessive fuel pressure.

 

Did you burn the chip using scan data or did you do it on a dyno?
How much boost are you running?
What is your FMU ratio?

Good thing you responded because I was going to go with SD.

 

Well, don't be discouraged about going to speed density. That is the better way to go. From what I've read, the best way to go with a forced induction setup is to convert to the 749 ECM. Thats what the Syclone and Typhoon use. The 749 ECM is SD, plus it uses the boost readings from the MAP sensor to add fuel while under boost. But running a turbo or super with a MAF car is possible. I'm running 10 psi boost peak. The FMU is the one that came with the ATI ProCharger system. I believe it is variable from 1psi fuel for each pound of boost up to 5 psi fuel for each pound of boost. I use a laptop and Diacom to do data logging. Every pass I run at the track I record so I can make sure nothing gets out of whack.