In the tuning SW I have seen, there is only a single MAF table (total voltage=total amount of airflow). The service manual is not very clear about what the ECU actually does. In the diagrams, it looks like it is eventually treated as a single value. It looks more like the "bank 1" and "bank 2" reference is more for identification of each throttle body.

I thought the same thing based on the VQ35DE, but I was surprised at the way the runners were setup on the VQ37VHR manifold. I am sure the airflow is equalized at some point, and the fact your AFR's were that close indicates that is the case.

Most people use the HPX MAF sensors (this is what UpRev recommends/sells).

Anyway, good luck. I am sure you will get it sorted out. You obviously have some good people supporting you, and these are pretty minor bumps in the road for a custom setup.

Thank you. The HPX MAFs are the only aftermarket ones I've heard of, so I can only assume those are the ones on order.

I think you were right the first time, it's not a huge plenum where you can see straight through to the other side, but I've seen myself, shining a flashlight in one throttle body, and peeking in the other, the light is visible(indirectly) from the other side.

Also, I didn't see in your pics, but where are the bank 1 and 2 wideband O2 sensors? If you have them sharing the same pipe after the two banks merge, the ECU will not like that either. It will try to trim one bank slightly, see no difference between the O2s, trim it more, see no difference, etc. until the banks are off by up to 25% or so.

Are you tuning with UpRev? I know with that you can log the fuel trim levels for each bank to check if something like this is happening.

I always felt you should upgrade the radiator and fans when FI. There's just so much heat generated from are cars in a tight cramp area especially when FI.

There is definitely some shared space in the manifold to equalize the airflow, but there is also a distinct plenum on each side that feeds 3 runners. On the VQ35DE, it was pretty much open space above the runners and a single large plenum (which makes sense with only 1 throttle body).

A/F sensors are in each exhaust manifold/header, and O2 sensors are in the cats. The O2 sensors are not used for engine control, only the A/F sensors. I am pretty sure the O2 sensors are only for emissions purposes and are used to monitor the emissions (cats) performance. You can disable these in the Cobb/UpRev tuning software if you are running test pipes or HFC. I am using the Cobb AccessPort and tuning software. Pretty sure the OP is using UpRev (I will be soon).

bank1 MAF is also how the ECU gets its IAT using the built in sensor in the maf, bank2 is ignored.

AWESOME BUILD! Just thinking outside the square, have you considered changing top manifold to a Stillen type, (custom manifold) with dual throttle bodies on one side of the motor?

next project... Twin charged... go go go!

I was just gonna ask the same thing?Would that be beneficial for you??

Ryan is on his way to NC!

Got the car back in this morning, luckly found two Flex-a-lite fans local and went to town today! Replaced the OEM fans with a 16" 2300cfm and a 10" 1800cfm. The smaller fan I centered over the turbo, wiring it to be on at all times when the ignition is on. This should help the start of the problem, the heat from the turbo radiating forward and heat soaking the radiator. The 16" fan fits to the left, the hotside of the radiator, and is wired so the ECU/thermostat will trigger the fan to low with the A/C on, or high if the coolant temps start to rise. I also wired the larger fan to a switch inside the car so Ryan can turn it on himself, to the higher speed, if he feels necessary. I put the car through some good tests this afternoon with the new setup and while it was most definitely hot, it never went outside of "driveable" conditions (coolant temp 2 dots to the right of center, oil temp 230*). These temps were reached with the car parked against a wall, zero airflow through the front of the car, fans running per the car (not manually switched on), after 40min of the car being to temp. I think that's acceptable to tell Ryan, get this bitch on the road to NC for the weekend! I wish all you guys going to Zdays a safe trip and look forward to some comments from those that get to check out the car this weekend! Ryan's build has definitely been a learning experience for me and I think we finally have a handle on the heat of a top mount single!!

The new fan setup

http://i19.photobucket.com/albums/b1.../IMG_6407R.jpg

http://i19.photobucket.com/albums/b1.../IMG_6409R.jpg

Enjoy!

-Shawn-

excellent work as usual shawn, good to see you were able to solve the problems quickly and get him ready for zdayz.

Damn dude! You are GOOD!!

great work shawn! i bet ryan is happy now!

Man, you work fast! Looks good. That fan is massive. Looking forward to the results....

Just thinking about airflow at the front of the car.... Have you thought about additional holes in the bumper (above the crash beam) to get some airflow above the IC, or a different bumper altogether if the fans don't fully resolve the issue? The IC is massive and blocking valuable air, and I am wondering if there is some way to get more air in (to the radiator/engine bay). These cars run so hot anyway, they need all the air they can get. Hopefully the fans do the the trick, but just thinking about this.....

seems like you have the temps managable at low loads, what about pushing the car hard?

holy fans batman

A little birdie told me there was a single turbo 370Z tearing up the mountain roads up in NC all day today!! :driving:

Tell that little birdie that we want VIDEOS damit!!!! :D

A text from Ryan earlier when I asked him what they were doing

"Out doing the poker run with the GoPro"

I think your wishes will be granted ;)

Just saw the car. Install looks amazing.

I wonder if two smaller fans would be more beneficial?

Yay for wifi! I boosted the car for awhile today :) Coolant temps NEVER moved passed 2 dots to the left. The car did see 240 once while pushing it hard. It was usually around 220, with as low as 190.

So far, ive met Adam, Kirk, Lou, Sam, and Patrick from this forum at ZDayz. Nice to meet you guys! Patrick was nice enough to do a photoshoot for me:) In 12 hours, I'll be attempting to make Tony proud and win the car show for him ;)

And yes...Shawn didn't lie. I got 2 GoPro videos while doing the Poker Run...which my navigator got us lost and made us go 30 mins each way out of the way. So we failed to complete the Poker Run..and he had a pair of kings and I had 2 diamonds.

Hopefully, more GoPro videos will be done tomorrow if I get a chance to ride the dragon :)

I have also checked the car out, the install looks sweet. I'll have to try and swing by again when you're there and say hey.

2 more GoPro vids from the Dragon today. I won 1st place Wild 370Z :) ...but I'm pretty sure I was the only one in the class, haha. Thanks again to Tony! I also won some red Z1 hoses.

Must see videos!

:iagree:

What is this poker run you were talking about?

A poker run is an event where participants use there car to visit five to seven checkpoints, drawing a playing card at each one. The object is to have the best poker hand at the end of the run. The event has a time limit but are not timed—winning is purely a matter of chance.

I am back on single turbo and dam, I have def missed boost,,, cant wait to see soem in car videos and some fly bys.... set up looks amazing

That sounds really fun!

Your car is even more amazing in person! Great seeing you again too!

Anyone in Georgia want to see my car? :ugh2: I'm broken down in McDonough...getting the car towed to a hotel now and then I'll be getting it towed to Z1 or Forged tomorrow, considering I'm still 450 miles away from home.

Car is throwing a bunch of TPS codes. I believe it's the same problem my car experienced on the first pull of tuning on the dyno. Nothing explained it, but the car fixed itself. Not so lucky this time...

Thanks, Mike. Good seeing you again, too.

ouch man. thats the other side of atlanta for me or else i'd say you can just tow it around here and avoid a hotel. Was good to meet you and definitely a nice ride. lets get it running!

I'm sorry to hear the issues man... I hope everything get's worked out.

damn im sorry man

Ouch, sorry to hear that, man.

I'm srry to read that bro....reset ur car bro that might help. Turn it to the on position n count 10sec but don't turn the car on n the push the button again to turn it off. Do that 5 times and see if it works. It worked on mine one time when my car didn't want to start.

sorry man, wrong side of town for me too. I would have come and got you with my trailer had I known earlier though.

Sorry to hear that man, I hope everything works out.

Wish I would of saw this earlier. I'm not but 15 miles away. When are you heading out tomorrow morning?