1G MAF vs 2G MAF...should I convert?
 

Hey all,

I was curious to know if the 2G MAF put on a 1G setup would be better dollar for dollar? I see many either converting to 3bar MAP or running a 3" GM MAFT and converter box...but I do not have deep pockets this month and would like to make the car breath better as the Supra TT intercooler is keeping this much cooler on charge temps.

Thanks
-Kenny

Re: 1G MAF vs 2G MAF...should I convert?
 

If you want one I just bought a MAFT and will be selling my 2G Maf with either and aftermarket intake or just the stock stuff. Let me know if you want it.
Mike

Re: 1G MAF vs 2G MAF...should I convert?
 

Yeah, the 2g MAF is a good way to go. How big of injectors do you have? It makes the car run leaner. You will also need fuel control if you don't have something yet.

Re: 1G MAF vs 2G MAF...should I convert?
 

Jet-

Stock injectors and fueling system. I have full intensions of putting in a Walbro 255L/hr pump (or maybe what you guys suggest??)...fuel relay and wiring upgrade...and FPR.

What sized injectors should I be looking for?

-Kenny

Re: 1G MAF vs 2G MAF...should I convert?
 

550s, if you dont have a bigger turbo than say a 16G. I have a set of ND 550s for sale if you want those sometime, Im in no rush...

A 255 should will be fine but you will need a FPR. If you dont plan on upgrading turbos to anything past a 16G then you might want a 190 pump and you wont need a FPR.

Re: 1G MAF vs 2G MAF...should I convert?
 

It has a Big 16G with an EVO III Exhaust manifold, Supra TT SMIC, 2.5" Full exhaust, and a few other minor things not important to performance really.

Next month will actually bring me a large payday from my company. I am sure my wife would like to put a cap on what I spend...but not her money!! ;)

Ok to get things straight with a 2G MAF upgrade I need:

1). 2G MAF and intake pipe from blageo23 if he agrees on price.
2). Fuel Pump (I would prefer a larger pump for future upgrades).
3). FPR...any suggestions of manufacturer's?
4). Injectors (minimum 550cc) again any suggestion on size or manufacturer

Did I forget anything? I am a bang for your buck kind of person...but I know it to be very true when it is said, "you get what you pay for!" So any suggestions from the veterans on manufacturers or needed components would be greatly appreciated!!

-Kenny

Re: 1G MAF vs 2G MAF...should I convert?
 

Well if you go any bigger than 550s you will need some way to control the fuel... so you will either need something like a AFC or DSMlink to control the flow. You should have something anyway if you are upgrading your fuel system or going above stock boost settings.

Pretty much any injector brand will work. RC are lower grade and ND are higher grade- just an example.

If you are not upgrading for a while just get 550s, if you plan on going 50 trim or higher get atleast 660s.

FPR- SX is good... pretty much all of them out there for DSM's are pretty good, just make sure its adjustable and get a guage.

Re: 1G MAF vs 2G MAF...should I convert?
 

I would just rewire your stock pump, get some 650-720cc injectors, and an AFC. The 2g MAF basically cancels out 550's, so it won't help with fuel cut much. That is why you want to go bigger. I wouldn't bother with a FPR, get the 190 pump if you want to upgrade, or you can put a 3/s pump (used=cheap) in for just a 16g.

Re: 1G MAF vs 2G MAF...should I convert?
 

I personally prefer the Blaha-style 1G MAS over a 2G MAS since 1) its cheaper 2) it flows slightly more than a 2G MAS, and 3) you can retain all your current hardware. If you don't know how to make one, PM me for some info...I've made many.

Re: 1G MAF vs 2G MAF...should I convert?
 

Get injectors as close to what you actually need, unless your are going to mod the ECU internally. Otherwise you could run into knock problems from the ECU seeing to low of airflow and wanting to run way too much timing. This usually isn't a problem at high boost levels, but at 15-20psi people often have problems.

Re: 1G MAF vs 2G MAF...should I convert?
 

I suggest 550cc fuel injectors, a Walbro 190 fuel pump, and just your stock FPR.

Re: 1G MAF vs 2G MAF...should I convert?
 

I had 550cc, AFC, rewired 255 (non-HP), FMIC, 2g MAF, 14b/7cm, and stock FPR. Ran 11.98 at 113.2. 12.5 at 109 on pump gas. Al Blaha ran 10.5 at 132 with his modified MAF and stock FPR with a rewired 255.

Fuel cut is defined as follows:

"Fuel cut is caused by the ECU seeing a large airflow value from the MAF which works out to roughly 100% duty cycle on the stock injectors. If you install 550cc injectors which are 18% bigger than the stock injectors, then adjust the AFC to compensate for the larger injectors, you won't hit fuel cut until you
make up that 18% airflow buffer. Ideally you should get the injectors, AFC and the Technomotive ECU mods. This gives you safe, consistent fuel and allows you to run ridiculous boost levels without running too low on fuel or hitting fuel cut." (RRE)

And a good comparision of the two is at www.VFAQ.com which reads:

"The 1G MAF has a lot of drawbacks to it, the biggest being that it is too small for enough airflow for high horsepower applications without major mods. The 2G MAF is much larger, with more than 50% higher cross-sectional area to flow through. If you are having problems with MAF overrun (see the Talon Digest Archives for details), you can either hack your 1G MAF up and hope you can tune the car properly with an AFC or similar fuel control, or you can run the Al Blaha MAF (which is hacked, just more expertly, with electronics changes), or you can install a 2G MAF with an AFC. I personally think that the 2G MAF is the best overall choice for a street driven car. If you install 550s at the same time as the 2G MAF, very little tuning should be necessary on the AFC to have the car running as strong as ever, without the MAF overrun problems."

Wiz