INJEN Cold Air Intake! Installation and Results! - Genesis Forum: GenCoupe Hyundai Genesis Coupe Forums

Predat0r · 11-11-2009, 04:25 AM

Well, time for next mod with Predator!

Now its INJEN CAI turn.

2 days ago we received an INJEN CAI Polished, we inmediatly proceeded to the dyno to do a base run, the results were 249whp. We already did a few passes a few days before of 255whp, but because we dont have any Piggyback for tunning, the OEM ECU its always retuning and changing AFR, etc.. Because the weather was pretty bad and raining, we said "Ok thats our base run for today" and started the installation right on the dyno.

The fitment was great and all the mounting hardware included. Then we proceeded to do the dyno runs, the first run was 254whp, not bad, thats better than the base run, because the car keeps retuning itself we did a few more passes, the next one was 258whp and 229wtq! WOW! Thats better than any other run without the intake! After another run the result was 263whp and 230wtq! Ouchhh thats 14whp extra than using the K&N(and we already gained 8whp from the K&N)! Thats awesome!

263whp in our Mustang Dyno its almost 290whp in a Dynojet and near 345hp at the engine! Its +33whp from stock form! Not bad with just boltons and no tuning! Now we need to find a stock 370Z!

Here is the dyno chart:

You can see that the second run was 30 minutes after(thats how long it took us to remove bumper, install CAI and reinstall everything)

This is a comparison of the best run without CAI and the one we did after the CAI:

Awesome gains, who knows, maybe we will gain a few more whp after a few days of driving around like it happened with the headers.

INJEN definetely did a good product this time with some nice gains...

coexrjguy · 11-11-2009, 04:33 AM

Nice write up!! You guys are doing a real nice service to the board, for that I thank you!!!!

Did you guys ever figure out the steering shaft issue? I figured mine out..... When you load the car up in a turn the motor moves a ton. This is shifting to the right on a left hand turn causing the steering shaft to touch the header. I need motor mounts in a bad way!!!! The V6 is a mush ball in those stock mounts.

Predat0r · 11-11-2009, 04:35 AM

Now we are thinking about the next mod!

Still looking for a center pipe or a true dual exhaust from any manufacturer(and fix that fitment problem with the headers).

We also need some kind of tuning tool, thinking about the AEM FIC, we need to call AEM to see which one is the right one.

And probably a Ligthweight Crank Pulley, we always get good results with those on other Naturally Aspirated cars, not neccesarily horsepower gains(1 or 2whp maybe) but you always get to accelerate faster, and we can prove it, we can do 0-60mph and passing acceleration tests in our dyno. You will be surprised of the difference.

Any other ideas?

Predat0r · 11-11-2009, 04:37 AM

Quote:

Originally Posted by coexrjguy

Nice write up!! You guys are doing a real nice service to the board, for that I thank you!!!!

Did you guys ever figure out the steering shaft issue? I figured mine out..... When you load the car up in a turn the motor moves a ton. This is shifting to the right on a left hand turn causing the steering shaft to touch the header. I need motor mounts in a bad way!!!! The V6 is a mush ball in those stock mounts.

Yeah, I can even see the chassis move left and right when moving the car around in the shop. But no one is doing motor mounts right now!

I need to make some phone calls to see if we can reinforce the stock ones or get new ones that are stiffer.

matt@qc · 11-11-2009, 06:39 AM

290 whp.
Headers
CAI

That's it?
No dual exhaust?
No tune?
No test pipes?

I guess that's going to shut a few people up. We're looking at WAY past 300whp with the above. Amazing!

tgpfarm · 11-11-2009, 07:04 AM

Thank you very much for the info, we need more detailed post like this around here.

Badcompany235 · 11-11-2009, 07:37 AM

since yall know way more about tuning than i do maybe you can help me figure something out. what is the small pipe inside the intake tubing there for? the one on the upper elbow that goes beneath the MAF...

**Jay@SFR** · 11-11-2009, 07:44 AM

NICE POSTING! PREDATOR!

We just tested out our customer's car in Korea @ SFR KOREA and had similar gains.
We will be posting pictures and dyno graphs as well.

Our test car aleady had catback exhaust and ITG stock replacement filter and it was dynoed @ 270rwhp then installed INJEN and pushed about 285rwhp...
The most interesting thing is we added M&S foglight surrounds and it pushed 292rwhp or something and gained over 7rwhp with simple replacement.. I guess after all our assumption was right

Once again we will be posting the results as well.
Note Korea is 13hours ahead from us and guys over there are in deep sleep now

Ronin · 11-11-2009, 07:53 AM

Quote:

Originally Posted by matt@qc

I guess that's going to shut a few people up. We're looking at WAY past 300whp with the above. Amazing!

It's 269whp up from 249whp, a 20hp diff, for the money.

You have to look at the relative values. Not the number that fits your mood best or else I'll go in my sig and translate my hp numbers in "dynojet" numbers and just add 15-20% to them...

matt@qc · 11-11-2009, 09:56 AM

True stock baseline:
230whp

Baseline:
249whp
Mods:
ARK headers
KN filter
HKS axle-back (not sure?)

Results:
263whp
Mods:
ARK headers
Injen CAI

That's on a MUSTANG dyno where a stock 3.8 will read in the 230 ish whp. That's a whooping 30 + whp on a MUSTANG dyno.

If you can into consideration a stock 3.8 will dyno 255 - 260whp on a dyno jet, this is definately something to cheer for.

Remember, the OEM ecu map is not optimized for any of these mods as the RRM timing mod has shown. I.E. very little gains with cat back and SRI, yet huge gains ( + 22whp) when the TC is added.

This spring I will do 3 dynos:
1. Stock
2. Full bolt-ons
3. Full bolt-ons + tune

From Predator's number, I am expecting very close to 300whp with full bolt-ons and 310 ish or even 320 ish with a proper tune (A/F, timing, rev limiter increased).

**ARKperformance** · 11-11-2009, 12:32 PM

Props to Predator. Only good things going on there.

McFly · 11-11-2009, 01:21 PM

Awesome work guys! Truly appreciate all the work you are doing.

Quote:

Originally Posted by Badcompany235

since yall know way more about tuning than i do maybe you can help me figure something out. what is the small pipe inside the intake tubing there for? the one on the upper elbow that goes beneath the MAF...

The small pipe inside the intake tubing (and other tubing tricks on various cars) is to get the MAF sensor to read correctly. You see MAFs measure Flow, and assume pipe diameter, to figure out the amount of air your engine is ingesting. It's like when you lick your finger and put your finger in the wind to figure out the winds direction, and wind speed. Well, if you knew the amount of air that is moving at one point in time and the speed at which it is moving, then you'd know the total volume of air that is moving. The MAF does just that, it measures speed of the air, and assumes the amount of air that is moving at one point in time. So, if you simply give the MAF a larger pipe, the MAF will not know it, and problems will occur, or if you change the speed and change the piping amount, the MAF may just do something a bit differently. I haven't seen a GenCoupe 3.8 MAF in close detail, and I know that the MAF on the GenCoupe has it's own piping section, so my guess is Injen put the pipe in to manipulate the Air Fuel Ratio to make more power, and to do it in a safe manner.

Whatever it's for, it's there for a purpose and it works. I'd leave it alone.

alika86 · 11-11-2009, 01:53 PM

You guys seriously just sold the CAI to me lol.

McFly · 11-11-2009, 02:00 PM

Correct me if I'm wrong Predator, but here's the info, in summary form:

Predator dyno'ed 230whp completely stock (best run)
Predator added K&N Filter and HKS axle back, and dyno'ed 243.5whp (best run)
Predator added headers, and dyno'ed 255.8whp (best run)
Finally Predator removed K&N Filter and added CAI, and dyno'ed 263whp (best run so far, they'll dyno more as it relearns)

This was done on 1) a Mustang Dyno; 2) In Puerto Rico; and 3) On his car.

Predator states that the K&N gave him 8whp. Which means that the axle back must be accounting for the other 5.5whp.

Here's the gains he saw:
K&N Filter, 8whp
HKS Axleback 5.5whp (assumed)
ARK Headers, 12.3whp
Injen CAI, additional 7.2whp on top of the 8whp that only a filter gave, roughly a total of 15.2whp (assumed) from the Injen CAI

Edit: Don't forget that weather (temperature, humidity, barometric pressure) plays a factor in all this, but that's the cold hard numbers. Also, the day they tested the CAI, the best run without the CAI produced 249whp (instead of 255.8 on a prior day/weather).

Badcompany235 · 11-11-2009, 02:03 PM

Quote:

Originally Posted by McFly

The small pipe inside the intake tubing (and other tubing tricks on various cars) is to get the MAF sensor to read correctly. You see MAFs measure Flow, and assume pipe diameter, to figure out the amount of air your engine is ingesting. It's like when you lick your finger and put your finger in the wind to figure out the winds direction, and wind speed. Well, if you knew the amount of air that is moving at one point in time and the speed at which it is moving, then you'd know the total volume of air that is moving. The MAF does just that, it measures speed of the air, and assumes the amount of air that is moving at one point in time. So, if you simply give the MAF a larger pipe, the MAF will not know it, and problems will occur, or if you change the speed and change the piping amount, the MAF may just do something a bit differently. I haven't seen a GenCoupe 3.8 MAF in close detail, and I know that the MAF on the GenCoupe has it's own piping section, so my guess is Injen put the pipe in to manipulate the Air Fuel Ratio to make more power, and to do it in a safe manner.

Whatever it's for, it's there for a purpose and it works. I'd leave it alone.

?????

let me explain this a little better for anyone that hasn't seen the intake. inside the pipe that connects the MAF to the TB, on the MAF side there is a ~8 inch pipe on the MAF side. when you install the MAF this pipe fits 4-5 inches inside the MAF on the opposite side of the sensors and touches the front screen. i don't understand how that helps the MAF read anything.

SUB-GEN · 11-11-2009, 02:08 PM

So this sucker with a full catback/injen cai/ark headers/hi flow cats/rrm pulley/tc/fc would be well over 50 + whp/30 + wtq? Sounds like thats all the mods you need for that 1 second delete in acceleration.

Badcompany235 · 11-11-2009, 02:16 PM

Quote:

Originally Posted by SUB-GEN

So this sucker with a full catback/injen cai/ark headers/hi flow cats/rrm pulley/tc/fc would be well over 50 + whp/30 + wtq? Sounds like thats all the mods you need for that 1 second delete in acceleration.

right now it looks like intake/TC/FC or intake/exhaust or intake/headers would get you there. the others are just icing on the cake. who was it that said i/h/e wouldn't put you past 300rwhp?

coexrjguy · 11-11-2009, 02:38 PM

Quote:

Originally Posted by Badcompany235

?????

let me explain this a little better for anyone that hasn't seen the intake. inside the pipe that connects the MAF to the TB, on the MAF side there is a ~8 inch pipe on the MAF side. when you install the MAF this pipe fits 4-5 inches inside the MAF on the opposite side of the sensors and touches the front screen. i don't understand how that helps the MAF read anything.

I think it's creating a small venturi effect or the Bernoulli principle if you will. The pressure drop induced by the increase in velocity of a fluid passing through a narrow orifice can be used to create a low pressure area downstream of the narrowing. Thus dropping pressure below atmosphere pressure effectively pulling air through the entire tube. Air moves from high pressure to low, this is how airplanes fly.....So if you can drop the pressure in the intake you can create an artificial vacuum. Looks like Injen done did some thinkin'.

No I've had nothing to drink......

matt@qc · 11-11-2009, 02:47 PM

Quote:

Originally Posted by McFly

Correct me if I'm wrong Predator, but here's the info, in summary form:

Predator dyno'ed 230whp completely stock (best run)
Predator added K&N Filter and HKS axle back, and dyno'ed 243.5whp (best run)
Predator added headers, and dyno'ed 255.8whp (best run)
Finally Predator removed K&N Filter and added CAI, and dyno'ed 263whp (best run so far, they'll dyno more as it relearns)

This was done on 1) a Mustang Dyno; 2) In Puerto Rico; and 3) On his car.

Predator states that the K&N gave him 8whp. Which means that the axle back must be accounting for the other 5.5whp.

Here's the gains he saw:
K&N Filter, 8whp
HKS Axleback 5.5whp (assumed)
ARK Headers, 12.3whp
Injen CAI, additional 7.2whp on top of the 8whp that only a filter gave, roughly a total of 15.2whp (assumed) from the Injen CAI

ARK Headers
KN filter
HKS axleback
255whp best dyno

249whp was their baseline they recorded on the day they installed and re-dynoed with the CAI.

We need to take into account the different temperatures that vary per day and time of the year.

**ARKperformance** · 11-11-2009, 04:34 PM

For dynos, there are too many variables to consider. On a given day, you can get different results with the same mods and same car.

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