Ok first off I would like to say the tech I just spoke to at JWT is a complete *******!!! All he wanted to do was sell an ecu not give me any usefull info! now back to my question and issue.


Acouple of weeks ago Mardigras posted that for his 740 cc injectors, Someone at JWT told him that they could do a program with the f150 maf and it would probably work in our cars. My question is do you guys think our cars will be able to read the f150 maf without going with a jwt program. Basically would we be able to run it and then fine tune our a/f with the emanage.

 

Yes, the eManage allows different Nissan MAFs. I'm guessing that it would work for going from a smaller to a larger MAF of the same hot-wire type.

You lose a bit of resolution when going to a larger MAF and it will lower your duty cycle, but the eManage SHOULD be able to compensate.

I'd say it's worth a shot.

 

true but is the f150 maf the same type as ours?

 

I'm guessing its the same as those Granatellis that Jegs carrys for the mustangs so its probably an "in-line" type. I think stock ones are pretty cheap, like $150 or so, the guys on hybridz scoop them up all the time to mimic the JWT setups.



as far as electronics....good luck getting Emanage to run it properly. dunno how that will work out. I expect the wiring to be the same as their 450/550 setups though on the Mustang MAFs.

the problem with Wolf and Clark and all them is that you REALLY have to have a clue or a direct question when you call them. They come off as *******s 99.9% of th time cause they think everyone has been tuning cars since out of the womb. so any "hey does this work out?" type of questions gets to them. when I was calling them to get Jahlils car together I made sure I knew WTF I wanted, cause I wasn't about to get carried over the phone by those focks

 

Yes, it's a hot-wire 0-5V output. It will work since JWT is using it, it must be the same type and compatible with the ECU driver circuits.

Here is the wiring info for the Ford MAF:
http://jimwolftechnology.com/wolfpdf/FORDMAFINST.PDF

 

http://www.sr20forum.com/showthread....ight=cobra+maf

http://www.sr20forum.com/showthread....ight=cobra+maf

hmmmm...doesn't look too promising Corey

 

but then again...this guy WAS running the Cobra MAF with Emanage...

http://www.sr20forum.com/showthread....ight=cobra+maf

 

have you guys looked into the Q45 maf's at all? they are huge compared to the stock maf's and should be able to handle quite a bit of air. i can get some pictures of mine if any would like me to.

 

yeah, I saw the comparison pic on SR forums...its way bigger and I'm assuming the wiring setup will be equal to the Z32.

Corey, as for right now, I think the safest way to go is get the Z32 MAF cause your pretty much garunteed it'll work with your setup. as far as the lightning MAF, I dunno...from reading on the SR forums there is more "internal" ECU tinkering(like JWT does) necessary that has to be done in order to properly run it.

 

It will work with eManage as long as the min on/off time of the injectors is not reached due to the MAF voltage.

 

You need the correct VQ map to make it work. You could fudge it but it will always have issues somewhere, drivability, or maybe up top...... been there done that.

 

What about fudging it with this:
http://www.splitsec.com/products/psc1/PSC1003.htm

 

how much larger is the q45 maf?

is it 33% larger?

Icey-do you know what im getting at?

 

I've seen a 90mm Nissan MAF on eBay, Pathfinder I think, and A32/Z32 are supposedly 72-73mm.

 

Looks like the Q45 is 90mm also:

http://cgi.ebay.com/ebaymotors/ws/eB...sPageName=WDVW

http://cgi.ebay.com/ebaymotors/ws/eB...sPageName=WDVW

 

yeah but the kid who used the cobra maf used the z32 setting which seems a little null and void to me

 

Neat product. Neat products by those guys in general. I would hit up the guys on Tweecer forums and see if someone can send over the flow map. You could get a custom maf from Pro-M with the flowchart. Question is why? The maxima ecu is easily programmed. Is the car output beyond the z32 maf flow capabilities?

A JWT tech was the motivation for me learning how to program Nissan ecu's. And yes they have a maxima ecu running a Lightning maf on a Skyline of all things.
edit: I thought Redmax had a 1990 model not a '99. My bad.

 

I have both a 99 and 90 the 99 is turbo

 

Why?

The Z32 setting just means the eManage is using/expecting the Z32 MAFs airflow vs. voltage curve. They're not linear, so it's probably not perfect, but probably close enough for fuel maps to take care off.

You still get a higher flow before the 5V or whatever limit.

 

Only a lucky few have the JWT option, ie 95s and some 96s. 97s can swap a 96 ECU, but they get a CEL.

The single Z32 MAF is good to ~350whp. People are exceeding that.

When you say "flow map", you mean the airflow vs. voltage map, correct? If so, I'd bet the SplitSecond guys could easily use that to make a larger MAF work.

I applaud people like you that have thumbed their nose at JWT and wish I had the patience, knowledge, and most of all time to do that. Luckily for my car, I have the TechnoSquare option, which shouldn't limit my 300-350whp goals.

 

Why not just drop the voltage output from the maf to the ecu and then tune the maps around that? If you've got 1.2vdc at idle, drop it to .72vdc and you've increased the highend resolution of the maf by around 40 percent. You can use 40 percent larger injectors but you're timing would be waaay too advanced. (See mustang forums for proof) If emanage can fix the timing up you should be good to go. The vq curve would be the same just shifted. There's a Nissan tuner that calls this the .5v step. You pay an extra 50 bux for that. It's the same thing the z32 guys do with the dual maf setup, except they double the load scalar (k value). You could also bypass air to achieve the same thing. When I first started dabbling with my 280zxt and larger injectors I installed a pipe with a filter sized to reflect the increase of my new injectors over the old ones. I also retarded my timing to keep everything safe. Worked fine.

 

Sounds perfect, but how? Inline resistor on output signal line?

 

Not sure what the technical name for it is (I have no formal training at all in electronics) Divider network is what it's called I think. A potentiometer with on end to the maf output, middle to ecu and other end to ground. Adjust pot until you're happy with idle. Start tuning. If you're happy with the tune measure the pot's resistance from outside leg to middle and solder two resistors in series with the ecu maf input to the middle. Or glue the pot.

 

Okay....gotcha.