ynottony

I bought an Injen 535i DCI for my 535i. I was at another shop yesterday and we checked the ambient air temperature (right around the cone area) and it came out to 135 degrees. This was after the hood had been opened for about 15 minutes. We checked another stock car (with the original airbox on) and it came out to 78 degrees.....this can't be good for performance?

How does this intake compensate for the higher ambient air temps?

Is it true that the dynos (and the 10-13 added hp claim) for this intake were performed/gotten using race gas?
(above 93 octane)


Am starting to think buyer's remorse here based on what several unrelated people have been telling me....


thanks

dbae1978

Tony,

I'm glad you posted your results here on e60.net. I have had similar issues with dual cone air intakes and with the advice of some great forum members, I ended up selling the DCIs and going back to the stock box configuration.
Unfortunately there aren't any enforced regulations in the aftermarket industry to hold manufacturer's to their claims.

Based on RPi's dyno results on the injen intakes, the heat soaked intake does in fact result in a loss of power. Sorry to hear about the buyer's remorse but like i said in the pm, you can probably sell the intake on n54tech.com or e90post.com and get yourself into a RPI ram air set up.

ynottony

Thanks David.

It was the combination of talking to more than a few people,
both online and in real life that got me asking questions.

And just to be totally fair and completely honest, 2 of these
people owned their own performance shops. So take what
they say with a grain of salt if you want.

but

The fact that a digital thermometer was produced and stuck
right next to my air cone and I saw the 135 degree rating
on it.....you can't argue with that. You also can't argue
with just how hot it was under the hood, and this was a 70
degree day here in Southern California.

I can only imagine what it's going to be like when summer approaches.
I can also only imagine the under hood temperatures BEFORE I popped
the hood and left it open (in the cool, shaded shop) for 15 minutes
prior to the temp. being taken.


I realize there have been threads posted on this time and
time before, but it would be nice to finally get a general
consensus on this once and for all.

Or is this not the forum to discuss manufacturers claims
due to the fact that Injen does or does not advertise/have
representatives on board which would make for a biased
post?


Is e60.net an unbiased forum to discuss manufacturers claims?

It would be nice if the folks at Injen would come onto this
forum to set the record straight once and for all.


And I totally agree with you David. There needs to be regulations
set up in the industry to back up claims.


(I am also not affiliated with RPI in any way, shape nor form btw.
Yes they installed my Dinan exhaust yesterday, yes I think Eloy is
a cool dude and he knows his shit, but that's the first time I went to
that shop.)

dbae1978

When I had the DCIs in last summer, my 535i would go into limp mode about twice a week. Once I switched back, I rarely had that problem unless I was racing/pushing the car, but that was due to my JB3.

e60 is an unbiased forum and is open to anybody and any vendor. there aren't any limitations or restrictions as to any subjects as long as it's appropriate. it would be great to see vendors such as injen on e60.net to provide some more details regarding their products. It's unfortunate that we don't have more vendors on this forum to hear their side of the story.

ObD

Doing my own online research I have come to the conclusion that the intake is as good as it gets in stock form. Save your money.

ynottony

Too late.


I remember seeing on other BMW forums guys who lined up by the dozens
to purchase an Injen intake for their 335i.

It would be nice if one or more of those guys would register for this forum
to post their experience.


Again, I'm not trying to "out" Injen. I have nothing against them personally.
It's just a matter of corporate responsibility and truthful (and accurate) reporting
of performance based claims.

If I were to completely gut my 535i (weight reduction), put in 2 gallons of 93
octane and then go out and make a video of me racing a brand new M5,
of course, I would win the street race. Which is all fine and dandy, but unless
I completely and truthfully disclose the conditions/mods done to my car it is
a flat out lie.

That's my main beef.....companies should disclose actual conditions/mods done
to the car that was based on the hp gains.

info@trinityautosport

check out this thread: http://forums.e60.net/index.php?show...73817&hl=injen

pigapumbu

+ 1.

I dont know why people never get that and still insist to try and mod the intake like this. Heat is a no-no for air intake. extra heat = less power as I understand it to be.

cheers

ObD

Because other cars with turbos have been exploited, the temptation to find hidden power is strong. I personally thought going turbo would be the downfall of BMW. I expected a huge brouhaha over a bunch of blown engines when people could not resist toying with these motors. With all the wacky ideas people try to mod with and with the abuse thrown at this motor via pushing the envelope, it survives. BMW built a heck of an engine.

bigbadbull

Hey at least it was not a AFE... 25+ hp 30+ ft/lbs..... Yeah right ,only took about 6 months to get a refund on that...