Alpine951

I am a bit behind the times. I have the stock afm. I sometimes see used MAF systems for sale but I am not sure what is necessary to make it work on my car or what issues I may have. I have searched here for "maf" but I get mostly threads that has maf in everyones signature. If someone can point me directly to some threads on here that they know of I would appreciate it.

fast951

When you add a MAF few things must take place:
- The MAF must be calibrated to support the HP target
- You need software (chip) to understand and to interpret the MAF signal for the DME to operate properly. Some use external signal massagers which is less than optimal approach and has many limitations.
- You must figure out a way how to attach the MAF (wiring & mounting).

UK952

John with the MAF kits on your website do they come with a chip or is that an extra?
Tony

fast951

Each MAF kit comes with the latest chip/board as part of the kit.

testarossa_td

Of course don't forget what MAF really stands for...Must Add Fuel

hosrom_951

Ever thought of another method of freeing up the intake?

Alpine951

Like what Hos, MAP?

hosrom_951

At the moment, i would not support any MAP upgrade that still use the DME/KLR units (stand alones are better in this case), so far i know Link AFM does that and some have issues some don't.

You cannot go wrong with Vitesse's eletronics at all, especially with the correct MAF and the chip, 100% on the money there.

UK952

What was your original point then Hos? (I agree MAP seems to require standalone at this time)
Tony

hosrom_951

You said it Tony, currently there is no reliable MAP intake system that uses DME/KLR intake.....

It is a hit or miss with the Link AFM, some like it and some don't. That was my point really.

Alpine951

Back to my maf question.

If someone has a maf sensor and maf chips for sale that was running on a stock turbo and boost configuration, and I now have a k27/6 at 18 psi with 65# injectors does the maf have to be recalibrated, and do i need the maf chips to be reburned,or will a fuel controller(massager) let me tailor the chips to my setup?

awilson40

Thats a big change, it would take a lot of signal massaging. IF the chips support the 65# injectors
so that all you are adjusting was the diff in turbos. Then perhaps, but I would only attempt it IF you
have a wideband O2 guage to datalog while you adjust.
Personally, I dont think I would do it.

jimbo1111

A maf chip is a chip that was tuned for a specific maf/injector combo. If you use it with larger injectors it might work but you will have to tweek it with a piggyback. It might be closer than a afm chip. Maf meters have the ability to learn what injectors you run and adjust the load the dme see's. The afm doesn't have this ability. 55,52,48 would run much better than 65's. I think mafs drop injector duty cycles to low with anything larger. This also depends on witch maf you are using. A 19lb will have a better idle than a 30 lb using 65's because the 30lb maf will spread the load further than a 19 lb maf.(I don't know if you understand) I always believed that if we were able to get a maf that was sized exactly like the stock afm. Tuning for larger injectors would become a breeze using afm chips. The load would drop symmetrically with each injector change and the timing would follow. (maybe someone can look into finding or having one speced out by a manufacture.)
I wanted to run 72lb injectors so I went with the Vitesse maf and 72lb chip map. There chip allows you to run larger injectors because it fires the injectors sequentially at idle. My previous sfr maf ran fine with the 52lb injectors and afm chips. You have to work a little on your part throttle maps with the afm chips and standard maf.This takes a little time. If you know someone who runs identical hardware/software. Maybe they can give you their PT maps. This would make it easier. Wot is easy because it's just one map. If you don't understand let me know and I will add a little more to this confuzion.

Alpine951

jimbo1111,


Please..... confuse me. What you said about mafs dropping injector duty cycles sounds interesting. Can you or others please elaborate on this. From what you are saying is it possible to run stock injectors with a maf& maf chips if I am running 18 psi with a k27/6?

awilson40

I'm sorry, I really take issue with the above statement.
A MAF will not compensate for a change in injector size.
(unless you have a type with a replaceable pick up tube that you can swap out)
Its calibration is based on airflow and airflow only.
If you increased the size of injectors, you would have to skew the MAF
voltage down by the same (aprox) amount.
That would then alter the look up points for timing.
The MAF needs to be calibrated for the injectors used to reduce the amount of signal massaging to a min so the car is running off the base look up points on the chips or as close as possible.
At least thats the way I see it and thats what I shoot for.