Yea, I don't know why they list it at 3", its 80/78mm. It has been a bit since I did the measuring, but I could have sworn it was 72/70. I highly, highly doubt that the g/z have differing maf's.

 

BTW, which air intake filter are you using? I just measured my popcharger and it comes in at 3", so If i do get this housing looks like I either have to change or bore it out to ~3.25".

 

I am using the pop right now, but I have an extra velocity stack from one that I am going to grind out to 80 mm to match the housing inlet. There is enough metal there to easily take out 4mm and leave structural integrity. The challenge is making the grind uniform. Haven't quite figured out how I am going to do it yet.

 

I was doing some research and thinking on this larger MAF housing and came up with the bottom items below.

HKS makes a kit with a filter that has an 80mm opening, the kit, for other cars, usually comes with a MAF housing, but for the VQ35 they opted to stay with the stock housing (not sure why), but they do provide a tube that is 80mm from the housing to the throttle body.

Fujita on the other hand makes a tube that is 3" all the way from the throttle body to the intake filter. You will need to remove the stock MAF sensor and stick it in this new tube. This would appear to be as good or better then the Z1 auto housing.

Injen on the other hand makes something that is very very similar to the Fujita, but right at the location where the MAF sensor plugs into, they purposely tapered it and made it smaller to be almost the same size as the stock housing then right after expanding it back to 3".

It looks like there is perhaps one benefit to the smaller housing to create a higher pressure and perhaps draw more air in, similarly to how venturi or becket injectors works for fluid and air mixture. Since I'm no expert in this subject, i'm just speculating.

Not trying to pick a fight but just wanted to know your thoughts and the research you have came up with when you bought this housing.

 

First off, I am no engineer, I don't know the technical reasons (i.e pressure, fluid dynamics, and resonance) as to why or why not one works as opposed to the other. I can only summize that the larger volume of air moving through the intake (maf too) creates all necessary pressure/resonance needed at the tb opening. Again, perhaps an engineer can step in, but that is my guess.

As far as other products, I am completely against any long tube style cai's. In terms of the MAF all I can point to is my personal results and that of others. The price is so nominal that I had to give it a shot.

 

Yeah, looks like I might just try it and see. It's cheap enough to try. Maybe i'll buy the HKS kit and the 3" MAFH and try that combo as well as Popcharger with the 3" MAFH.

The Injen and Fujita intakes that I was looking at are actually short ram intake and quite cheap, roughly around 100.

 

I would assume that the results would be close b/w the hks and jwt, but I worry about the filtration of the hks filters. I have heard less than stellar things over the years about them.

 

The problem is finding a filter that has an 80mm opening, have you found any? The injen and fujita ones are but doesn't look like the sell just the filter.

 

No, but truely I didn't look real hard. I am looking for an effective way to bore or port the jwt velocity stack out, but haven't really been home much the past few weeks. When I get back I will look into it.

 

This is what I plan on using: http://jhpusa.com/store/pc/viewPrd.a...idproduct=4300
They have been proven to add a bit of power over a standard 3” filter and it’s fairly cheap too at $55.

Edit: When are you guys planning on trying the 3” MAF out on your car?

 

That's a nice find, thanks for the link. Does that bolt on to the regular housing that has four screws? Looks like you may need an additional pipe.

Look at this thread, it's actually very informative.

http://my350z.com/forum/intake-exhau...f-they-do.html

 

Can anyone confirm this beyond the shadow? Also I'd like to hear more about piggyback ECU on the early 03.

 

Yeah, you’ll need to pick up an adapter for the MAF housing to the velocity stack and filter.

Here is a dyno for the same style velocity stack:
http://355nation.net/forum/engine-dr...dyno-info.html
http://forums.clubrsx.com/showthread.php?t=511839

 

From Uprev (a couple of threads down),
"The only G35 we don't support is the early 03 G35 Sedan, because they shipped them all with the older style Nissan ECU which doesn't have the ability to be tuned in the same way. 2003-2008 350Z (all models), 2003-2008 G35 Coupes, 2003.5-2008 Sedans are already tunable by all our Pro Tuners."

Alas, clarification.

 

It's funny they claim they can't do it, yet Technosquare cracked the early 03 sedan ECU within 6 months of the car being in the US. The TS ECU flash is an option for us early 03 sedans and it does work as advertized (~8-10whp/wtq). The problem is you have to send in the ECU which is a quick turn thing (2 to 4 days TAT unless you're in Socal). The only real advantage to the early sedan ECU is that it can adjust to mods a bit better (ie without much or any tuning). The later model ECUs can really lean out dangerously with certain mods.