Grimmspeed intake on track

[Pat]

Real track drivers don't care about an extra 5-10 hp? I know plenty that would disagree with that statement.

[7thgear]

Originally Posted by Pat

Real track drivers don't care about an extra 5-10 hp? I know plenty that would disagree with that statement.

if I did a blind test with someone by having a remote switch that would give a 5hp boost in a ~2800lb car, I would bet money that people would not even notice me flipping it during the course of a 20 minute session.

[vroom4]

Originally Posted by CSG Mike

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 amount of data Bob at Drift-office has is incredible, you would never believe how closely some of these heavily modded BPU cars line up with the 100% stock cars with a header+tune.

[qoncept]

Originally Posted by Pat

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?

The point is that there is no sense in a scientific measurement. First, if someone did, it would be pretty broke-ass science because no one has nearly the time or money a proper "scientific" test would take. And, more importantly, because aftermarket intakes do pretty much nothing.

[Sleepless]

You could install CMS Lap Timer on a iOS or Android phone and use it to measure before and after HP to get your scientific test.

[renfield90]

Originally Posted by Sleepless

You could install CMS Lap Timer on a iOS or Android phone and use it to measure before and after HP to get your scientific test.

Even pros have a little variance in their times, and your results would only speak to that day, with that weather, and with X number of oil spills on the track...there are too many variables to control for to try and measure such a paltry HP change.

This is a case of needing to shoot the people with calculators so we can build the damn bridge already.

[wparsons]

The lap time difference 5whp would make would be very minimal, and smaller than the average variance between laps for any driver. You'd have to run A LOT of laps before and after under the exact same conditions (air temp/humidty, track temp, wind, etc) to get any statistical difference out of the data.

[Sleepless]

The lap timer app measures HP. You can overlay the HP graphs to compare.

[TylerLieberman]

What is the big deal?


It's an intake...


5whp isn't some crazy significant gain. I have a GS intake and when I installed it I noticed a VERY VERY SLIGHT difference above 5k but that's it. After one or two pulls, it felt the same as it did before.


Take it to the track. Datalog. Is the MAF Scaling f*cked up? Is it pulling timing? Are IATs climbing significantly? Any knock? Does the car sound/feel like sh*t?


Is your answer "no" to the following questions? Good, it's working.


/thread

[wparsons]

Originally Posted by Sleepless

The lap timer app measures HP. You can overlay the HP graphs to compare.

That's based of g readings from the accelerometer in your phone, which isn't nearly accurate enough to give consistent readings back to back to back.

[Sleepless]

Originally Posted by wparsons

That's based of g readings from the accelerometer in your phone, which isn't nearly accurate enough to give consistent readings back to back to back.

No, it is calculated using GPS. Accurate enough and quite consistent.

[wparsons]

Phone GPS doesn't sample fast enough for very accurate readings either. Plus, that relies on you being on the exact same line lap after lap or the reading will be skewed.

At the end of the day, it doesn't matter how the data is collected, you're going to have to run a lot of laps before and after, under identical conditions, to do any meaningful analysis on the data. It won't matter though, because 5whp isn't going to give any significant change in lap time at all.