Until yesterday I have had a stock Z and would consistently run 14.2s or low 14.3s with my best being a 14.1. Yesterday I installed an Injen CAI and took it to the track today and ran my worst time ever a 14.94, trap speed was 97.8, and 60ft was a 2.54, terrible because I couldn't hook up. I don't know why I ran such a terrible time maybe I screwed something up in the install even though it was strait forward and I did disconnect the battery. Even though my 60ft was terrible even if I take .5 of of my time it brings me to a 14.44, which is still not good. Someone please tell me theres something I have to do to get this thing to work because I've been pissed all day thinking I spent $250.00 to slow my car down.

 

May be your previous runs were on good weather conditions (lower temp, less humidity etc) + bad 60ft this time = 14.9

 

I wouldn't put an Injen intake on my Z. Cheap, and it may actually hurt your performance.

Other factors may be weather and track conditions.

 

What was your previous 60 ft times on your better runs? The Injen will "not increase" your 1/4 mile time.

 

My previous 60ft times i think were very low twos less then 2.1 but I couldnt find my slips last night I looked everywhere. I think I might have left them at my apt at college. And the weather up there was much better, its at see level and about 40 degrees yesterday it was 90. And VeeTec I was just wondering why you say it might hurt my performance?

 

Its your 60ft, not your intake. If you drop .4 in your 60ft you will drop .7-.8 off of your 1/4 time, so if you could hook a 2.0 or a 2.1 like you said you have run, then you would be right back down to where you were...it's not your intake it's you/track conditions or both.

 

I didn't know that you drop .4 in your 60ft you could drop .7-.8 in the 1/4 I figured if you dropped .4 in your 60 then you would drop .4 in your 1/4. If your right I feel much better.

 

He is right, it makes a huge difference.

 

If the intake flow is inconsistent, due to poor design, it could cause a problem with the A/F ratio, and hurt your power.

 

What design do you think is better or what about it don't you like?

 

I don't like it because it appears they didn't really R&D their product much before putting it on the market.

I would go with a JWT pop charger first, as they at least get dyno results from their intake.

The Injen looks cheap, and in the past versus other intakes, over various types of cars, it hasn't done as well during dyno tests.

Its just my opinion.

 

The reason I got the Injen was because they did dyno it. The dyno results are on the box, on their website, and on the website that I bought it from. They claim 10.6 to the wheels but I'm guessing its probably more like 5.

 

People really need to do some research before making off the wall comments... Injen is one of the best companies in terms of R&D. The even had an in house 350z dyno day to show the intakes/exhaust gains vs other brands. The cold air is pretty much known to make about 8whp. It has been shown many times. The JWT pop charger is known as the best bang for the buck. Being that it makes about 5-6whp and is only $100. But in terms of the best intake out, Injen is it.

 

Sorry, but from looking at its design, I am going to have to disagree.

I would be curious as to what actual owners are seeing on the dyno.

I know someone who put down 257.9 rwhp with only a JWT pop charger. Her car does have 40K though, so that may have helped the h.p. a little, as they get better with miles.

 

I agree that you need to do a little more reading and research before posting crap like this for others to possibly listen to. The Injen has already proven itself to be one of the very best CAIs for the 350Z and is currently what the SCCA racing 350Zs are using because of its performance. Dyno numbers do not represent real world on the street/track driving, but even on the Dyno the Injen is performing great!

UF350:

Are you comparing times from two different tracks in two different locations at different sea levels and so on? If that is the case then you have just thrown in way to many variables to determine anything. You need to test the change at the same track with the same conditions.

 

Yea there both at sea level but I used to race my car up at college at a different track and it was colder. This was also the first time I have ever raced at this track so I guess between the difference in temperature it being a different track and having my worst 60ft it could make the difference. Thanks

 

Having owned many cars, most of which ended up being modified, I am very familiar with a lot of different intake manufacturers, and it is my opinion that Injen is a cheap lower end example.

That is my opinion, and you are certainly entitled to yours.

Since someone is making 257.9 rwhp with only a JWT pop charger, I would certainly choose that over the Injen.

Anyway, if you prefer the Injen, thats your right, as me stating my opinion is my right.

To get back on topic, is it possible to turn your car off for a while, and push it in line, until you get close burn out box?

That may help with some of the heat soaking that occurs in the heat of summer. I usually raise my hood until I am about to pull up the the box as well.

I also let my car cool down between runs, as hot lapping will not usually improve your times, unless you get a lot better 60'.

Speaking of the 60', keep working on the launch, as thats a big part of your e.t.

Your trap speed still seems a little low, so I am curious as to why, even given the conditions. It could also be because of KR. You might try to reset the ecu before your next trip.

Just a few ideas.