Originally Posted by gbennetto (Post 50655731)

What year Supra was the new MAF out of? I dont wanna get raped by the dealer for that part when i can get it from a supra in the junk yard.

Originally Posted by Weasy2k (Post 50655807)

Yes but please do a quick search about supra maf conversion (unless its stated in this thread) as earlier years were wired up the same as the supras but aparently in the newer years (i think it was 00+) there is 1 wire that needs to be swapped around.

Originally Posted by mokai (Post 50656186)

The MAF on my 03 Taco looks nothing like the 96 runner or the Supra..Mine is just a small sensor that sticks through the intake tube, post filter..

I dont see how it would work in this application.. Any thoughts..

Originally Posted by midiwall (Post 889080)

Okay, first off... If you're supercharged, you HAVE to do this mod. The difference is _incredible_.

Second off... The mod is PAINFULLY easy on a '96. It'll take you longer to get your tools out than it will to do the work.


Now... what IS this about?

Well, a lot as been written about replacing the stock MAF with one from a Supra, and I won't go into a lot of detail here, but the bottom line is that after you've done the deckplate mod, the ISR and maybe bored out your throttle body, then a new airflow bottleneck emerges - and that's the MAF (Mass Air Flow sensor).

The stock MAF is "too small" when it comes to looking at the air flow that a supercharged setup can _require_ in order to provide all the boost that it can. If you starve the intake, then the S/C will be limited in the amount of boost that it can kick.

The old saying goes "a picture is worth a thousand words", so... The stock MAF is on the left, the Supra MAF is on the right (click for larger pics):
http://www.midiwall.com/4Runner/pics...upraMAF_02.jpg http://www.midiwall.com/4Runner/pics...upraMAF_04.jpg http://www.midiwall.com/4Runner/pics...upraMAF_06.jpg

Quite a difference... and the difference it makes in terms of what your right foot gives you is just as dramatic.


Like I said up top, the install is painfully easy on a '96. The hardest task you'll have is to find the right sized plumbing adapters to fit this to your intake tube (the MAF itself will fit into a '96 airbox _without_ modification). And as for the electrical...

...are ya' sitting down?

...really? You sure???


.... it's a direct plug in. :D There are _no_ wiring changes involved on a '96. :D :D

We're talking pull the connector off of the old MAF, pull the old MAF out of the intake path, pull the Supra MAF out of the box, fit the Supra MAF into the intake path, plug the original connector into the Supra MAF, reset the ECU and... fire it up.

Write-ups for other model years talk about havinig to juggle the middle 3 wires, and truth-be-told, I did that before trying to fire the engine. But in the end, troubleshooting why the engine would try to start, but not run, cost me a good 20-30 minutes.

I finally wondered (out loud to myself!) "what if...". So I hooked up the wires in the stock configuration and... WHAM! She started right up.


Driving it... WOW.

Okay, I've always had a "lump" in acceleration. Something that I'd attributed to things needing to be tuned a bit closer, or my needing to keep things like the air filter (or MAF!) cleaner - and doing those things _did_ help. But, even in just backing out of the driveway with the new MAF, I knew things were different. Finding a nice straight path got a grin going; finding a place to play at highway speeds got a _SMILE_ going!

The acceleration is _glass smooth_ from stomping on it to redline. Cruising at 60mph and then kicking it brings up redline a _LOT_ quicker than it used to. There's more power up top, and the power is "cleaner". It's hard to describe... If you're S/C'd now, then you know that things can sound a bit "strained" up top - not any more. It's like if you remove a piece of gauze from in front of your face, you can see a lot better. Well, now you can tell the S/C can breath a lot better.


Honestly, I didn't expect this much of a difference. It's VERY cool.

Bottom line... if you're S/C'd then you need to do this mod. BUT!!! Remember that since you'll be sucking more air, you'll need to be able to burn more fuel. The stock ECU will _NOT_ be able to handle this (and you shouldn't be running the stock ECU setup anyway!!!!). I don't know if the 7th injector system will be able to either. In my opinion, you will HAVE to be running something like an SMT or FTC module in order to make this happen. To make up for the added air, I had to crank up my SMT quite a bit in terms of global fuel delivery.


Whew... YAY!


The MAF is Toyota part #22250-46030, NipponDenso #197400-0010.

Other references:

https://www.yotatech.com/forums/f2/supra-maf-works-newer-trucks-33185/

http://www.tacomaterritory.com/forum...1&page=2&pp=30