MAF MOD CONCERNS

[conrank]

Hey guys. Just decided to order everything I need for the MAF MOD, but am now a little concerned about it causing long term problems... for example carbon build up issues, or extra stress on the engine. Am I over worrying?? Is it a fairly fail safe mod if done properly?

Also will it mean that I will have to use strictly only high octane unleaded?

[shnazzle]

The higher octane was only really meant for the US market. The fuel on this side (as long as you stick to good fuel like Shell, BP, Tesco99, stuff like that) is fine.

Running something like vpower or BP ultimate has a lot of cleansing agents, which would cover your knock issues and your carbon buildup.

Haven't read any evidence suggesting carbon buildup.

People have had rough starting due to the overfueling. Which makes sense as the MAF plays no role in that, so all you're left with (from the car's point of view) is a fair bit more fuel coming in. Especially on a cold morning when it's already adding extra fuel during cranking.

Other than that, it's easily kept an eye on by monitoring your spark plugs at normal service intervals and if yoy want additional comfort, buy a 15 quid USB bore scope off ebay to check the cylinders and piston crowns.

Follow the strict rules of the MAF mod application and you'll be fine. So, stock airbox, vanes removed, maf raised, 2zz injectors, good fuel

[conrank]

Thanks Mate, I've had some drill holes made in my air box to slightly increase airflow, would I have to change that??

The higher octane was only really meant for the US market. The fuel on this side (as long as you stick to good fuel like Shell, BP, Tesco99, stuff like that) is fine.

Running something like vpower or BP ultimate has a lot of cleansing agents, which would cover your knock issues and your carbon buildup.

Haven't read any evidence suggesting carbon buildup.

People have had rough starting due to the overfueling. Which makes sense as the MAF plays no role in that, so all you're left with (from the car's point of view) is a fair bit more fuel coming in. Especially on a cold morning when it's already adding extra fuel during cranking.

Other than that, it's easily kept an eye on by monitoring your spark plugs at normal service intervals and if yoy want additional comfort, buy a 15 quid USB bore scope off ebay to check the cylinders and piston crowns.

Follow the strict rules of the MAF mod application and you'll be fine. So, stock airbox, vanes removed, maf raised, 2zz injectors, good fuel

[shnazzle]

Probably not, although all that will do is add some noise. The pipes are more than sufficient for the flow required by an mr2. A panel filter like the TRD or green will do better.
Put it this way the TTE turbo uses the stock airbox with a better panel filter.

[jvanzyl]

One thing it will do is show you how old your O2 sensors are.
The older they get the longer it takes for them to react. This is key with the starting- old sensors will result in prolonged cranking.

Sent from my Moto G (5) using Tapatalk

[Beachbum957]

I was one of the earliest adopters / testers of the MAF mod (2013) and have almost zero issues.  I am running a stock airbox, and stock exhaust.  The only oddity is a noticeable fuel cut when off throttle at about 3,000 RPM after the car coasts for a bit (like going downhill).  Give it slight throttle and there is a very slight hesitation. It doesn't happen all the time, and not everyone has experienced the issue.  Otherwise it is a very nice modification.

I did see an improvement in fuel economy.  Not everyone has reported that, but some have noticed it.

A friend dynoed his Spyder before and after the mod, and while the change is mostly to improve midrange, he did see a couple HP improvement.  He then installed Crower Stage 1 cams and found they did not play well with the mod.  After removing the MAF mod, the HP with the cams was almost identical to the stock cams with MAF mod

Not everyone will see the same results as often homemade spacers vary a bit in thickness, but the conclusion by most is it a cheap modification that works

[shnazzle]

It's a very simple concept
The MAF mod was designed around a specific volumetric efficiency of the stock 1zz configuration.
Hence the raising of the MAF is down to the millimetre.

Any changes to the volumetric efficiency (cams, intake, free flowing exhaust, bore, forced induction) and the maf mod is no longer calibrated to this and you'll see issues.

Hence I said, stick to the recipe and you're fine. Change the ingredients and you're pushing the limits of what the stock ECU can compensate for.