Grimmspeed intake on track
 

Grimmspeed seems to have developed an intake that allows the engine to produce significantly more power than the OEM intake. Their posts are detailed, thorough and well-written. They have documented gains with multiple dynos, as have other people using it. And the air:fuel looks good, too. It's tempting to buy it.
That said, I wonder how it performs when the car is really pushed, lap after lap. Has anyone here used this intake on track? If so, what are your thoughts? I'm really interested to know how the car behaves with the Grimmspeed intake in a racing application, not just on the street or a dyno. I'd love to see someone test it on a track with the same detail Grimmspeed tested it on a dyno.

your question has hidden assumptions in them that you've not voiced.


if the intake has proven to supply the engine with more air, this will not change when you drive the car "hard"


if you're worried about heatsoak, with the beefy shielding I don't think it would be an issue.


what is it that you're worried about?

I'm curious to know if the same types of gains seen on the dyno can also be realized reliably on the track when the car is really being pushed hard for 20 minutes. Consider it fear of the unknown. I don't know what I don't know. It is a completely open inquiry. "There is no difference" is an acceptable answer.

The intake is just a tube that makes it easier for more air to get in the motor. That improvement applies regardless of how long or hard you run the motor, unless you do something ridiculous like place the inlet filter so close to the header that they're touching. If there's heat shielding, this isn't a concern.

What does make a difference is the tune you're running. Somewhere here there is a great thread about what constitutes a "good" tune for the track, that may be worth your while.

"there is no difference" :)


your main points of concern for hard driving is engine cooling and lubrication. If an engine is being properly lubricated at high rpm and is maintained a proper operating temperature then it can run hard for a long time. The intake has no impact on the stress of the engine and will provide the same gains as it would on the dyno... (pending ambient temperatures and elevation, of course).

If anything, you'll probably see better gains on a track than on a dyno. You'll have a better supply of fresh air at higher speeds on a track than you'll get on a dyno.

Look for dyno pulls done back to back for signs of heat soaking, bonus points if IAT is logged. I'd bet if you're happy with the dyno charts, you'll be happy with how it performs on track.

The only issue I see with it on the track is people have noted that it rubs against oil cooler lines under driving conditions.

As does the stock air box...

hehe, you guys said "box".

Hey guys, I appreciate you replying to this thread. There is a lot of common knowledge and internet wisdom here, but I'm looking for a more scientific approach. I agree with everything you all have written, but has anyone actually measured and confirmed these statements on-track?

How are you going to measure power output when not connected to a device that measures power output?

My God man, it is a tube and 5hp. If you want it, then go put it on your car.

I wouldn't bother.

I can make any part look like it makes more power on a dyno by manipulating the car, without making ANY actual alterations to the car itself, or the dyno calibration.

6whp is within the error range of a roller dyno.

The only thing you would be able to measure on a track would be IAT, and you would basically have to have two cars on track at the same both logging IAT to see the difference at the same point in the track.

LMFAO!!!!!!! No one will test it cuz real track drivers dont give a eff of air intake - 5-10 whp not gonna cut lap time even 0.5 sec. Fastest FRS/BRZ drivers usually has bone stock engine - @WoOosOn