I have a few question that I was wondering if some people could answer real quick regarding FI.

1) Can the stock MAF see boost (I know the answer is yes but please confirm)?

2) Regarding the MAF: Does the MAF tube have to be a certain length or just a certain diameter?

3) regarding question 2: What happens if you use a bigger tube for the MAF sensor (like Injen CAI) and use an EMU such as UTEC to compensate for more air flow? Does this present any problems?

4) How close can a BOV be located to the MAF or does it not matter?

5) Lets say you were aiming for no more than 5psi of boost. Could you ultimately run no intercooler and just use 93 octane and water/methonal injection to keep things safe assuming a good tune?

6) If using a smaller turbo, the outlet for the compressor side is only so big. Is there any benifits or negative affects to stepping up to a larger diamter pipe?

7) Would there be problems with using a small turbo on our cars. For example, would the hot side cause to much backpressure due to the small size? If so would a turbo company be able to put a larger hot side on?

8) How close can the MAF be located to the throttle body assuming it clears the plate when open?

Thanks in advance

 

Ultimately I am actually looking into going turbo again. but I am looking for no more than 350 to the wheels (prolly on race gas). I would perfer external wastegate but I don't know if they offer turbos that small with external setups.

 

never, ever, EVER EVER EVER run without an intercooler on a car with 10:1+ compression. That's just stupid and careless IMO.

Using a smaller turbo creates more heat in the compression and the smaller turbine housing creates backpressure in the piping and stock headers, and even into the combustion chamber=bad. You really need a large sized t3/t4 at the smallest, for a single turbo setup.

to answer a few of your questions, you really need to research the kits already out there and look at pics of them

 

(1) Yes
(2)nope the stock housing is fine
(3)you change the MAF resolution and the tune will be changed
(4)Preferrably a few inches away or more
(5)you could but not intercooling a turbo system that is in such a tight space and is subjected to heat is asking for poor performance
(6)If you only want to run 5 PSI small is not the size turbo I would be looking at but yes the turbine housing comes in different A/Rs which can be swapped out to accomodate whatever craziness you are trying to do
(7)see 6
(8)should be a few inches away at the very least to prevent reversion.

 

Damn near ANY turbo on earth can be used with an external wastegate. If it has an internal built in then you just need to weld the internal gate closed.

 

or just get an external gate housing

 

Does changing the MAF resoltuion make tuning harder?

What do you mean by reversion regarding MAF location to TB?

 

Well it changes a given parameter setting. For instance we already have a general idea of what timing the car is going to run where under what conditions. Changing the MAF pad alters this. Of course if ou are using a piggyback it doesnt really matter that much as long as you have a good tuner.

By reversion I mean air going the wrong way across the MAF. Its a possibility its going to happen more severley if the MAF is right in front of the throttle body. I would not want that.... it could make tuning interesting.

 

I remember someone once stating that for a dual inlet manifold you would not need two MAFs. I believe this was for controlling the twin TB setup that crawford tried out. Is this true? This would be assuming that both side took in the exact same amount of air if I am not mistaken. Then you could tune accordingly.

 

Based on the info that I am getting I will prolly just sticj NA for know until I get the money to buy a TT I guess. thanks for the help!

 

No thats a bit different and would require some unique tuning. Its just like running a turbo system with a draw through MAF. The ECU technically has no idea whats going on since things are not happening according to original design behind its eye into the airflow (the MAF)

 

Thanks MIA!

 

MIA:

Assuming that the car is NA would there be the likely hood of air reversion or would it not be as possible as on FI?