Hey everyone,

I've had my G for about 3 months now and after installing clear corners, the mod bug bit me pretty bad. I've installed a few mods already and more are planned but my question is about the Plenum Spacer with an Intake.

I installed a MD 5/16" spacer a few weeks back and noticed an immediate improvement using the old trusty butt dyno. A couple of days ago I finally got around to installing the Fujita Intake I bought and it now seems like I've lost hp.

I checked the plenum bolts and they needed re-torquing but there isn't any noticeable improvement. The engine is loud above 3-4k but it doesn't seem to have the hp that the spacer and stock intake had. Has anyone else noticed this or did I just get use to the additional hp the spacer gave me?

Thanks,
Jaffy

BTW, I did an ECU reset after installing the intake.

 

Aftermarket CAI (Long-Ram) intakes for the VQ are known to have a loss of low-end power/torque.

I am not familiar with the Fujita Intake; is it long ram?

The stock intake already seems to be pretty effiecient; therefore, improving on something good isn't so easy.

If the intake itself somehow leaned out your AFR, there could be something to gain from a retune; but I doubt that's the case.

My personal suggestion would be to go ahead and switch it out for a Stillen intake; its by far the "best" intake out there... but that doesn't mean you'll gain anything significant.

I think people are better off with a drop in filter on the OEM airbox than most long ram CAI in the market for the VQ35

In my opinion, Stillen > OEM with drop in filter > Stock > Long-Ram CAI. But the gap in "performance" between all of these are minimal.

As far as sound, well, they all sound good.

.

 

the pics of the fujita dont seem to show any type of heat shield. i realize it points downwards but its got to be taking in alot of heat from the motor. that would be where the stock intake and the stillen would be an improvement. i have a jwt with a heat shield but it still adversely affected from heat from the motor so i run it in cooler months. during the warmer months, i use the stock intake with a higher flowing filter. maybe throw the stock back in and try the fujita when it cools off. also, from the pics ive seen, i would describe it a short ram. it has an extra bend where most short rams end but its hardly that much longer.

 

Thanks for the feedback. The Fujita is considered a SRI. It does have a bend at the end but that is only to point the filter downwards.

The reason I went with a Short Ram instead of a true CAI is because of the spacer I installed. I read some posts (including Tony's) that said a long CAI with a spacer can reduce hp/torque.

I agree Skaterbasist that the stock intake does a pretty good job but after removing mine, I could see were the Z-Tube and a Stillen would be less restrictive. However, the Stillen CAI just looks like a modified stock box to allow for a cone filter. Does anyone know if this is correct? Note: I haven't seen one in person so I'm only going by pictures.

If this is the case, I'm thinking about modifying the stock box around the Fujita Intake to act more like the Stillen one. I unfortunately can't return the Fujita since my darling wife through out the box it came in and since I spent around $250 for it, I don't want it sitting in my garage. Also, I REALLY like the look of the Fujita. I just wish it didn't have that annoying whistle when you slightly press the accelerator!

 

I haven't heard of anyone actually loosing HP from installing an air intake of any type. I have heard of people loosing HP after installing different plenums, but that is a different story. The only thing i can think of is since you are allowing the car to take in a lot more air that you are going to be running lean. Since the car is running lean and you don't have a piggyback, mapped ecu, or anything else the stock ecu is going to compensate and probably not let the throttle body open up as much. Even though your foot is planted we have electronic throttle bodies and the ecu can get screwy when it reads something that isn't correct.

First thing i would do is an ECU reset. disconnect the battery for 24 hrs and the ecu will then reset. After the reset drive the car around for about 50 miles or so and let the ecu adjust itself and see what happens. If you still notice a "loss" in power then you need to be looking at a reflashed ecu or some kind of management.

-Sean

 

I know of 2-3 people losing power after using the AEM intake. One of those was me. My car was very lethargic when accelerating hard.

I switched to the pop charger and the car came back to life.

I am totally against cold air intakes on our cars.

 

Thanks Nismo G. I did the ECU reset from inside the car but I guess it didn't take. I forgot about the battery way and I did that last night. It might be my imagination, but I think it worked. I noticed an improvement today with the car.

 

AEM = crap...thats just my opinion though and might be why

-Sean