blower is on now I have tuning questions

Project 77

Founding Member

Jun 30, 2002

370

2

16

Bernville PA

Aug 2, 2006

#1

• Aug 2, 2006

• #1

OK I got my VOrtech A trim on, I put in 30 pound injectors, matching mass air meter, 70MM TB, and spacer, along with a 255 fuel pump, and FMU. I had it put on the dyno and right off of idle it's lean, and any kind of boost it starts to ping. The guys adjusted the timing but it still is lean, they told me to replace the sample tube in my Mass air meter with one that is made for #24 pound injectors. They told me it would cost me $600 for a custom chip and tune, do I screw around replacing sample tubes or just bite it and spend the coin for a full out tune. Also, I dorve it home and everytime i left off the throttle this thing whistled like someone letting air out of a ballon...wtf is that?? Any help is appriciated

 

foxbody88stang

New Member

Jun 4, 2006

21

0

0

COLUMBUS,OH

Aug 2, 2006

#2

• Aug 2, 2006

• #2

Did you try bumping your initial fuel pressure up when it went lean?Or do you have a 1to1 regulater for the boost?

 

Project 77

Founding Member

Jun 30, 2002

370

2

16

Bernville PA

Aug 2, 2006

#3

• Aug 2, 2006

• #3

I didn't do any adjustments on it while it was on the Dyno, they made all the adjustments, They know I don;t know anything about this fuel injection and stuff so I'm begining to feel like i'm being screwed with.

 

foxbody88stang

New Member

Jun 4, 2006

21

0

0

COLUMBUS,OH

Aug 2, 2006

#4

• Aug 2, 2006

• #4

Your best bet would be to put the aeromotive 1:1 boost referencing regulater on it jegs PN 027-13103.it adds 1 lb of fuel per lb of boost.Dont put 24 lb meter on your car with 30 lbers. Mabey a fuel pressure gauge with an ajustable fuel regulater.

 

bob331T76

New Member

Aug 28, 2005

76

0

0

so cal

Aug 3, 2006

#5

• Aug 3, 2006

• #5

The whistle is from your TB, professional products are known for that

 

S

speedytang

Founding Member

Jul 28, 1999

765

1

17

Marengo,Ohio,US

Aug 3, 2006

#6

• Aug 3, 2006

• #6

The stock FPR is a 1-1 ratio under boost so save your money unless you want something adjustable. You need a new meter unless you let them remap the meter using software(ship).

 

Metalcop

Active Member

Jun 6, 2004

148

1

28

New Hampshire

Aug 3, 2006

#7

• Aug 3, 2006

• #7

Something is not right. I am also running the A trim, with stock injectors, stock MAF, stock fuel pump, 65mm TB and the included FMU. I had absolutely no pinging problems, and I was running quite rich, with the stock tune. I did have mine dynotuned to the tune of $1K, and now she runs great, and not too rich. With all of the supporting parts you mentioned, you should be able to do away with the FMU (stock longblock assumed) altogether. You are going to need the professional tune, to get you Air-Fuel Ratios where they need to be.

 

Metalcop

Active Member

Jun 6, 2004

148

1

28

New Hampshire

Aug 3, 2006

#8

• Aug 3, 2006

• #8

Add on:

With that set up you should be running super rich, not lean at all?!

 

STANGateURlilSS

Founding Member

May 2, 2002

716

0

16

USA & SANDBOX

Aug 3, 2006

#9

• Aug 3, 2006

• #9

Project 77 said:

OK I got my VOrtech A trim on, I put in 30 pound injectors, matching mass air meter, 70MM TB, and spacer, along with a 255 fuel pump, and FMU. I had it put on the dyno and right off of idle it's lean, and any kind of boost it starts to ping. The guys adjusted the timing but it still is lean, they told me to replace the sample tube in my Mass air meter with one that is made for #24 pound injectors. They told me it would cost me $600 for a custom chip and tune, do I screw around replacing sample tubes or just bite it and spend the coin for a full out tune. Also, I dorve it home and everytime i left off the throttle this thing whistled like someone letting air out of a ballon...wtf is that?? Any help is appriciated

Click to expand...

i dunno what all is done to your car.. but if the motor is stock.. the a-trim will work perfect with the stock 19lb injectors and fmu.. so something is weird..