2G MAF Will I Be safe?

[SleepingTsi94]

If I run a 2g maS with a afpr and a walbro 255. Will I be able to just adjust my fuel pressure and stop the car from leaning out with this and buy a chip at a later time?

 

[jking29]

In short..No. You need some way of adjusting fuel such as a chip, afc, dsmlink, etc.. The 2g mas will flow about 30% more, and there is no way you could adjust fuel pressure enough to make up the difference. If you had 550 injectors you might be able to. I put my 2g mas in the same time as my 550's and ran it for a short while with no way of adjusting fuel and it ran well. I would not suggest this for everyone as every car is different and your mileage may vary. A logger is definitely required before trying it.

 

[SleepingTsi94]

Well I already have a logger. And I have a set of 680cc sitting waiting waiting to get put in.

 

[fallenauthority]

Yea the only way to do that without a chip or some kind of fuel control is to use 550s in there at the same time, they cancel out the effect of the 2g MAF.

 

[SleepingTsi94]

So there for I could throw my 680s in and should make up the difference and some. Or would I be over running the car and make it worse.

 

[jking29]

With the 680's you need some way of adjusting fuel beyond the afpr. The car will run pig rich with the 680's and be a complete dog without any way of correcting for the injectors. Again, you HAVE to have some way of tuning the fuel, whether it be an afc, chip, maf-t or dsmlink. If you try and run the 680's with no way to tune, plug changes will be a daily ritual and you are likely to do damage to the ring seal by washing down the cylinders with so much extra fuel. If driven like that very long you will most likely wash the bearings as well from all the extra fuel that will find its way into the oil.

 

[oldman]

No.

Please refer to the tuning guide before you make your plans, there are reasons why they're in the order that they are.