Last Call

iTrader: (4)

I dont like the way my current intake set up is. The radix intake tube is not large enough to go around the 90 throttle body, so I used a 4" coupler to mate the 2 pieces together. The tube then shrinks down to the 75/78mm MAF which is probably around 3.25-3.5".

I was thinking of buying the 100mm lingenfelter MAF and running 4" intake tubing straight to the 90mm tb. I already have maxed out the MAF and at the point where I am going to need a 2 bar tune or this.. How much power can I look to expect?

Question is...
1. Should I remove the stock MAF altogether, make a 4" intake, and run a 2-bar SD tune?

or...

2. Install a 100mm MAF, run true 4" intake, and clibrate the tune with the new MAF.

trever1t

iTrader: (14)

I like the idea of the larger MAF and intake but I dont see why you cant do that (for less restriction) and run a 2bar, keeping the MAF enabled like I have? Best of both worlds as I see it!

Last Call

iTrader: (4)

Im not sure what the 2 bar map will do if I have a MAF capable of reading all the air flow coming into the engine. I was under the impression that a 2 bar map is mainly used to calibrate air flow based on boost when the MAF is not used.

In your set up, once the MAF is maxed out, does the 2 bar map take over? Are they used together all the time?

trever1t

iTrader: (14)

The way I understand it is that the tune uses the MAF and keeps the A/F at stoich until manifold pressure reaches ~3in. mercury.

04Denali

Jason,
My Radix tube fit just fine on my 90mm TB
Mark

Stoichiometric

iTrader: (10)

I think you can tune to enter PE when your MAF is maxed out, but I am not for sure. Have you heard of anyone who has tried the 100mm yet? As long as there are no tuning issues with it, that would be the way I would go.

Last Call

iTrader: (4)

Hmmm... I thought you enter PE when TPS hits a certain percentage.. I am confused. lol

Stoichiometric

iTrader: (10)

That is correct, but I think there are PE modifiers that can be adjusted also. You may be able to set PE to enable at a MAP setting under any throttle position.

trever1t

iTrader: (14)

I think this is how my tune is functioning.

dewmanshu

iTrader: (4)

LOL

If your MAF can read ALL airflow, your golden. But if you are 1bar and your MAF fails for any reason it will revert to your VE table(SD). Again, being 1bar...it will only see the max of 105kpa, that's the danger of having a maf that fails in 1bar and being boosted. There is your lamen explanation. Ofcourse you can "over inflate" your ve table in those rpm/kpa ranges.

1bar PE is TPS/KPA/RPM/TQ enabled