Couple Vortech Tune questions!

[KungFuHamster]

me personally, id run 42# injectors with a LMAF and have a chip burned for it.

oh and id put a bigger fuel pump in it. a 255lph at least.

[Andy@PrimeTuning]

Stock the fuel pressure is referenced, but unfortunately the stock regulator doesn't work with boost, only vacuum.

The Stock Regulator works well with boost. So there will be no need to run 60psi of Base Pressure - The 39lb/hr injectors that he has will work just fine.


Brooks - The MAX MAF Voltage can be bumped to 5.0 volts in the tune. Very simple first step when setting up a car.
From the factory they typically are set to 4.5 max maf volts

Jeremy - The Lightning MAF is not calibrated for 42s - It is designed to work a vehicle with 42s but that is all done within the PCM from the Factory

[turbostang]

Brooks - The MAX MAF Voltage can be bumped to 5.0 volts in the tune. Very simple first step when setting up a car.
From the factory they typically are set to 4.5 max maf volts

I knew it was something like that, been years since I've had any dealings with stock type systems. Agreed, it should be one of the first steps in tuning a stock setup.

[Diabolic]

My NA car maxes out the 90mm LMAF at 4.05 volts. It's true that no factory meter is calibrated for any specific injector size. Each MAF meter has it's own specific MAF transfer table. A set of values that matches the amount of air flowing through the meter to a voltage. This voltage tells the engine how much fuel to apply. I realize that many on here already know this. I'm just clearing it up. I personally believe that the proper way to tune a car is by adjusting the MAF transfer and not the injector slopes, offsets, or pw. Those values are known and given by ford and should not be altered. Different intake tracts effect the way the air flows through the meter and the result is that there is no perfect MAF transfer table. All tables must be adjusted based on different engine combos. I know many people will adjust the Hi and Lo slope to make fueling changes, but this is incorrect IMHO.

Get a 90mm LMAF meter, 255 in tank pump, 42# injectors, a tune, and be done with it. You could also install a 255 inline with a hobbs switch that activates the pump at 2psi of boost. This would be plenty fuel.

[turbostang]

My NA car maxes out the 90mm LMAF at 4.05 volts. It's true that no factory meter is calibrated for any specific injector size. Each MAF meter has it's own specific MAF transfer table. A set of values that matches the amount of air flowing through the meter to a voltage. This voltage tells the engine how much fuel to apply. I realize that many on here already know this. I'm just clearing it up. I personally believe that the proper way to tune a car is by adjusting the MAF transfer and not the injector slopes, offsets, or pw. Those values are known and given by ford and should not be altered. Different intake tracts effect the way the air flows through the meter and the result is that there is no perfect MAF transfer table. All tables must be adjusted based on different engine combos. I know many people will adjust the Hi and Lo slope to make fueling changes, but this is incorrect IMHO.

Get a 90mm LMAF meter, 255 in tank pump, 42# injectors, a tune, and be done with it. You could also install a 255 inline with a hobbs switch that activates the pump at 2psi of boost. This would be plenty fuel.

I agree 100%.

[STRONGNUFF]

me personally, id run 42# injectors with a LMAF and have a chip burned for it.

oh and id put a bigger fuel pump in it. a 255lph at least.

He's been told countless times the right way to do it, but seems to just want to ignore it. I have posted to just get 60lb injectors (better to have enough fuel then trying to make a smaller injector do more work than it was intended), Dump that FMU ,get a minimum 255 intank and an inline ( I ran a T-rex) and get a GOOD dyno tune with a chip.

[Cobraman]

He's been told countless times the right way to do it, but seems to just want to ignore it. I have posted to just get 60lb injectors (better to have enough fuel then trying to make a smaller injector do more work than it was intended), Dump that FMU ,get a minimum 255 intank and an inline ( I ran a T-rex) and get a GOOD dyno tune with a chip.

Can any of you guys read?? dammmnnnnn!


I have a cobra 90mm maf, 39# injectors, A Walbro 255lph in tank, and a t-rex and I will be getting it tuned! I've said that COUNTLESS times.

[Cobraman]

I know that the cobra maf is calibrated for 39#'rs and im running a T-rex inline as well as a 255lph pump, so I figure that would be all right.

hmmm. I wonder.

[STRONGNUFF]

Can any of you guys read?? dammmnnnnn!


I have a cobra 90mm maf, 39# injectors, A Walbro 255lph in tank, and a t-rex and I will be getting it tuned! I've said that COUNTLESS times.

Dammmnnn....Can you read? what does ^^^ this answer ^^^ have to do with your original post? For the past few months you keep asking how to do this Vortech, how to do that with a Vortech, whats the best way to do this with a Vortech.

Guess what, its all been answered a thousand times for you. Now you want to run it without a tune? Please do that so I can read your next post about how you blew it up..

[SVT Lurch]

Dammmnnn....Can you read? what does ^^^ this answer ^^^ have to do with your original post? For the past few months you keep asking how to do this Vortech, how to do that with a Vortech, whats the best way to do this with a Vortech.

Guess what, its all been answered a thousand times for you. Now you want to run it without a tune? Please do that so I can read your next post about how you blew it up..

Do that and then buy mine to daily drive.

[Diabolic]

So basically all you need is a tune for that MAF meter. INkjectors may be too small for use without a FMU, but you might get by. You will kost likely need a boost refrenced FPR to get the injectors to work without the FMU. I would hook up a 2 psi hobbs switch to the inline so it only comes on under boost and shuts off the rest of the time.

[thedriver33]

hmm, good read be doing the same build next summer....gotta get the motor back in the car first.

[majorownage]

You are trying to get this dude to blow his shit up, eh?

If there's no such thing as a calibrated MAF, then why will a car not run "right" when you switch an aftermarket MAF onto a car that has a different size injector other than what it's spec'd for?

Because the EEC still thinks it has the stock maf. Fucking read my goddamn posts you stupid fuck. To make an aftermarket maf work, you must change the maf transfer table around.

YOU CAN RUN ANY SIZE MAF WITH ANY SIZE OF INJECTORS

[majorownage]

The Stock Regulator works well with boost. So there will be no need to run 60psi of Base Pressure - The 39lb/hr injectors that he has will work just fine.


Brooks - The MAX MAF Voltage can be bumped to 5.0 volts in the tune. Very simple first step when setting up a car.
From the factory they typically are set to 4.5 max maf volts

Jeremy - The Lightning MAF is not calibrated for 42s - It is designed to work a vehicle with 42s but that is all done within the PCM from the Factory

^^^^ This

I didn't know he had 39ers. He was asking if he could run stock with an FMU.

[majorownage]

My NA car maxes out the 90mm LMAF at 4.05 volts. It's true that no factory meter is calibrated for any specific injector size. Each MAF meter has it's own specific MAF transfer table. A set of values that matches the amount of air flowing through the meter to a voltage. This voltage tells the engine how much fuel to apply. I realize that many on here already know this. I'm just clearing it up. I personally believe that the proper way to tune a car is by adjusting the MAF transfer and not the injector slopes, offsets, or pw. Those values are known and given by ford and should not be altered. Different intake tracts effect the way the air flows through the meter and the result is that there is no perfect MAF transfer table. All tables must be adjusted based on different engine combos. I know many people will adjust the Hi and Lo slope to make fueling changes, but this is incorrect IMHO.

Get a 90mm LMAF meter, 255 in tank pump, 42# injectors, a tune, and be done with it. You could also install a 255 inline with a hobbs switch that activates the pump at 2psi of boost. This would be plenty fuel.

Well, larger injectors have different slopes.