Can you relocate the stock MAF? And tunning update

[phoenix64]

Just curious what would happen if the stock MAF were to find its way into the 3in pipe right before the turbo? I know I would get a lower signal for the same amount of air, so I could avoid buying an LS6 MAF.

The reading should change in a linear manner, so I should be able to just calculate the difference in the pipe areas, then multiply the stock MAF table by that number right?

I have two reasons for doing this. Since I set PE to Boost threshold at each RPM the tunning has gone pretty well. My blind tune had an A/F ratio of 10:1 and richer (stock O2's are worthless). Now the A/F ratio jumps around a lot, due to the design of the pipe right before the TB/MAF. I'm already working on a new mandrel bent pipe, but looking at every factory turbo kit I can find, they all put the MAF before the turbo. Plus if I eliminate the MAF from the TB, I could smooth out the TB and get more flow there. I think with the increase in flow, and the more accurate tunning I could get some signifigant gains.

As always opinions appreciated.

[FastFieros]

I will tell you that you can move the MAF around in the intake tract with no problems.

I am using the SLP recal 85mm MAF that was done for the LS1/LS6 applications.

The throttle bodies I have used this on are the

3800SC 99+ MAF removed and plugged to use the external
LS1 TB attached to a M90
3800SC 04 MAF is external anyway and replaced with the 85mm

All with excellent results. Custom tuning of the MAF table is a must.

I dont know much about turbos, so I cannt help there.

Here is my 04 engine in a Fiero with the 85mm MAF downstream...





Loyde

[WhiteHawk]

Ihave heard about the LS1/LS6 amf series that they like to have a few inches of straight pipe before and after to be consistent.

Remember, a MAF measures mass flow, and it is temperature compensated. So it should read the same whether it is pre or post boost. just keep it away from the bends!

-Geoff