I don't know how you would pretest a maf except with an ohmmeter to look for completely open curcuits across the heater element and the thermistor.

I had trouble with the maf positioned in front of the blower, which is the recommended location. I had it about 9 inches from the blower inlet, but that was still close enough for the maf to sense backflow from the blower whenever I let off the throttle. Since it sensed backflow, it would cause the injectors to pulse even though the throttle was closed, resulting in momentary richness. My spark plugs were completely soot covered after less than a thousand miles.

Removing the recirc hose so that the bov released to atmosphere helped while driving, but resulted in extreme richness at idle. I fooled around with the SAFC's idle air measuring adjustment feature (can't remember what it's called) which overrides the maf signal and sends a lower signal to the ecu when idling. I got it to where it would idle nicely, but there was a transition at about 5% throttle that was jerky and I never did get it to smooth out.

Eventually I got fed up with it and moved the maf back to the charged side. All problems disappeared at that point. Putting the maf there is against JWT's recommendations (they say it will result in a blown maf), but I've had it there since last November with no problems. We'll see how long it lasts.

 

WOW that is not good news.

I am awaiting my JWT ECU to move forward.

So you were using the "AIR CLEANER TO THROTTLE BODY BOOT" http://cgi.ebay.com/ebaymotors/ws/eB...tem=2435038702 and running your recirc to that point, correct?

Why does this setup (MAF before blower) work on a 5th gen and not on ours?

Is there any other way to get this to work how JWT recommends?

EDIT: who is successfully running the JWT 370 z32 boost program with the maf in the "recommended" location?

 

I think the 5th gen kits position the maf far enough away. My maf was in the fender well, which apparently is too close.

 

I just got off the phone with Ben.

He said that the maf should be at least 18 inches away from the SC as the MAF reads from both directions.

I am sorry if everyone already knew that.

So now my problem is how do you mount this thing 18 inches (or more) away!

Once I get the kit, I am curious to see how this will work.

EDIT: I guess I will mention one other thing he told me.
There is a JWT turbo and a JWT SC program. The turbo program is a little more aggressive "down low" than the SC program.
He also said it does not matter what pulley you run as long as you do not exceed the ~425hp (I forgot the exact amount he said) the z32 maf can read.

 

Aggressive how? In pulling timing?

 

My *GUESS* is that they advance timing on the TC to help spoolup.

 

From what I can tell from my SC program, timing at low end is at the very threshold of detonation (which is where you want it to be for maximum power). My guess is that they retard the timing a bit more in the turbo program for safety's sake since boost pressure is significantly higher with a turbo setup at low-midrange.

 

However, before spoolup ~2-3K, a turbo isn't moving the air/heat a SC is and you can take advantage of more agressive timing.

I agree once the turbo is up to speed though.

 

I am sorry, I do not have any more information.
I am sure you have the info, but Ben at Jwt is 619-442-0680.

Any ideas on mouting the maf 18+ inches from the sc?

I also had another question:
I have a 4 pillar gauge pod. I have EGT,fuel pressure, and boost.
Any advice on the 4th one I should get?
I was thinking oil pressure, but maybe oil temp would be good to know. hmmmm

 

J&S gauge

Otherwise, AFR would be my choice.

 

The AFR guage is useless. None of the boosted guys that I ran into even use that. The EGT will monitor mixture for you by monitoring the temps.

 

Depends on if it's wide band or narrow band. My wide band afr gauge has been extremely useful. Expect to pay about 10X as much, though.

 

stephen, can you aim me some of the info about that uego

slimermax1

 

I have an Innovate Techonology LM-1 wide band controller and data logger. It uses a Bosch LSU4.2 WB O2 sensor. I bought the analog gauge and auxiliary input cable, so I get afr in real time, and I can data log rpm and up to 4 other inputs. Right now I'm logging afr, rpm, throttle position, boost pressure and maf voltage.

Do a google search on Innovate LM-1 and you'll find their website.

 

No I am not talking about that, I am talking about that useles POS gauge that ricers buy for their cars. That stuff you got, thats the real deal. You can dyno tune with that.

 

so if you are running less than 350 crank hp, you can keep our stock maf's and the a/f will still be just fine....so you won't need a FMU?