1g to 2g maf question

[everhart1121]

can use use a 2g maf on the 1g 4g63t without anything other then the wiring adapter?

 

[95blackGsTurbo]

You SHOULD have an SAFC to adjust with but it's not NEEDED.

 

[everhart1121]

You SHOULD have an SAFC to adjust with but it's not NEEDED.

do i need the translater that you use for the gm maf?? Can i use a bov that is not piped back into the intake w/ the 2g setup

so all i need to start is the 2g maf and wiring adapter and add the asfc or the translator setup? This part of the build I really have no clue on. Any help would be great.

I have search for the last hour through posts and can not find a straight explanation on the intake upgrade

 

[ilco187]

you need bigger injectors along with that mass or you will run like crap, 550cc inj will be the perfect match and a safc to fine tune.

 

[95blackGsTurbo]

You don't need a translator or bigger injectors if you are stock. You can stick with just an SAFC bare minimum I would say.

 

[everhart1121]

do I have to have the safc to install it or can I buy that at a later time, and yes i am mostly stock just starting this project

also is the 2g maf with a safc better then the gm maf and translator??

 

[jeffo]

Yes, a 2G MAS is much better than a GM MAF, as long as your plans are <425whp. But, the 2G MAS puts out a frequency 25% lower for the same airflow as a 1G, so unless you compensate somehow you will be WAY too lean. The right way to do it is with a chip, not an AFC.

 

[95blackGsTurbo]

Yes, a 2G MAS is much better than a GM MAF, as long as your plans are <425whp. But, the 2G MAS puts out a frequency 25% lower for the same airflow as a 1G, so unless you compensate somehow you will be WAY too lean. The right way to do it is with a chip, not an AFC.

Care to back this up? The GM MAF is better all the way around. With the Translator it is much more accurate than a 2g MAF as if reads exact air prior to entering the throttle body instead of pre-turbo. If it were me I would opt for the Translator set-up. Although this would not be my first mod.

 

[ramsack]

the only reason it would matter where you are measuring the airflow is if you want to run a vented BOV. the actual mass of air is exactly the same before and after the turbo. just because of where it measures the air doesn't make the sensor better or more accurate. IMO a maf before the turbo is better and will help you know when a boost leak is present. i think it's weird the gm mafs aren't ever the same from one to another. also why would you really want to tell the computer there is less air with an afc? the ecu would think there is less load and will throw more timing advance at it...bad news IMO. just get an eeprom/dsmlink/some way to tune the actual chip and get whatever airflow measuring device you want. but if you go that route i would just go speed density.

 

[mosul210]

you need bigger injectors along with that mass or you will run like crap, 550cc inj will be the perfect match and a safc to fine tune.

That's exactly the setup I have on my 1G. Very little tunning required on the SAFC, the 2G MAS and 550's compensate each other very well. IMO this is the best street setup (taking into account performance and price).

 

[habitatguy187]

Care to back this up? The GM MAF is better all the way around. With the Translator it is much more accurate than a 2g MAF as if reads exact air prior to entering the throttle body instead of pre-turbo. If it were me I would opt for the Translator set-up. Although this would not be my first mod.

A lot of people claim that the gm mas doesn't read air very accurately. I'm planning on going 3g/evo mas when the time comes, even though I would like to vent.

 

[IgotBoost91]

if you want to vent your bov get a gm maf with a translator.

you would have to do a blow through ic piping set up.

 

[everhart1121]

if you want to vent your bov get a gm maf with a translator.

you would have to do a blow through ic piping set up.

Thanks! what do you mean by "you would have to do a blow through ic piping set up."

Is there a way to install a bov to the air w/o changing the maf? Doing all of stage 0 and a little of stage 2 from the upgrade guide here.

if all goes good i will be starting to pull the head off next weekend and fixing the bent vaulves. if it runs great then i will be geting alot of stuff ordered at once.

Yes, a 2G MAS is much better than a GM MAF, as long as your plans are <425whp. But, the 2G MAS puts out a frequency 25% lower for the same airflow as a 1G, so unless you compensate somehow you will be WAY too lean. The right way to do it is with a chip, not an AFC.

Will take some time before i have the money to do the ecu and chip

Care to back this up? The GM MAF is better all the way around. With the Translator it is much more accurate than a 2g MAF as if reads exact air prior to entering the throttle body instead of pre-turbo. If it were me I would opt for the Translator set-up. Although this would not be my first mod.

This isnt my my first upgrade to the car. I am doing all of the stage 0 and some of the stage 1 from the guide, to give you all some incite to my path.