You could easily test it with an AccessPort by monitoring AIT's with the stock tubes, and the Cobb silicon pieces.... Not sure how they did it, but the easiest way is to monitor air intake temps.

 

or you can wrap a temp sensor around the outside of both intake tubes. I don't know if measuring the AIT would be a good indicator though.

 

still no one has?

 

All those words and no numbers from a company that could easily provide
the numbers they got during development speaks volumes doesn't it?

 

Some people on here are asking for numbers.......

I think it would be pretty easy to get air temperature numbers, and IMO, that would be the biggest benefit of this. I think the more important numbers would be the AIT numbers rather than wrapping a temperature element around the outside of the hose. The temperature element on the outside of the hose doesnt tell you how conductive to temperature the material is and how it resists heat transfer across the material. The outside of the hose might end up being hotter than the stock flexi-tubes, but that doesnt necessarily mean the air INSIDE the tube is warmer. Its the inside air temperatures that are important.

Monitoring the AIT's to show a decrease in air intake temperature would be a good benefit.

I'd like to see a driving in traffic scenario to see if these are a benefit. Where you completely stock car is driven for 20 minutes to warm up, and then sitting at a red light, and then do it with a car with these on it. I'd be curious to know what real driving condition AIT temperature differences would be.

As for hp numbers, the problem with mods like these are that they produce very little hp gain. HP numbers in such small gains can vary greatly from pull to pull and from dyno to dyno and car to car. Heck, look at an entire intake setup. Some guys on here have even dyno tested their intakes to show gains over 10hp/10tq, whereas others think they even lost tq after installing the intake. If an entire free flowing intake shows such variance in gains, only changing a part of the stock intake probably is going to produce similar results.

The biggest benefit of these should be slightly lower air intake temperature, slightly improved airflow, and asthetically, it looks nicer. I doubt you would see more than a few hp increase. Realistically, if companies are only able to get 5-15 hp increase from CAIs replacing the entire intake system and making it as less restrictive as possible, then just changing a part in the stock intake system is going to produce even lower gains.

Now I dont work for Cobb, nor have I owned any Cobb product ever, but if there wasnt a benefit to these, then they probably wouldnt have been made and a company like Samco wouldnt be selling them. Samco makes airbox hoses for a lot of vehicles to replace the flexi-tube that comes stock in almost all vehicles.

 

I agree with your completely reasonable and rationale thoughts
and remarks, with one exception. No smart marketer would
omit emprical HP gains data unless there isn't any.

I would argue that replacing a "intake tube" from the middle of
the system without modifying the intake box/filter would
never "create " HP over a given replicable verifiable range...never
because there are too many variables...ambiant air temperature
RPMs, barometric pressure, turbulance at speed vs on a dyno,
engine temperature, and filter effeciency....just to name a few.
The benefit of buying this is profit to the seller and perhaps a cosmetic and a placebo effect for the purchaser....if you just
gotta have blue tubes to make your seem car faster and modified
go for it. Do they have connections for a grounding kit? haha
OK, you can flame me now.

 

^ No flaming from me. And I agree with you on the gains, which is why I said:

Considering that full replacement intakes (both SRI and CAI) produce negative hp and tq, to gaining up to 15 hp and tq, you are probably going to see a minimal benefit from these. Maybe 2-3 hp. Tops. And there very well could be absolutely no gains. But my point was even if there are minimal gains, they will likely be so small that they are impossible to prove on a dyno. Very small gains, like under 5 hp, are impossible to prove, which is why I think they omitted dyno sheets.

If they came on here with a dyno sheet and said they were dyno proven to produce 5 hp, everyone on here would be trashing the dyno's because anyone thats dyno'd their car knows their car can easily vary 5 hp and 5 tq from pull to pull.

Heck, I can dyno my car, put on a sticker, and dyno it again and it might dyno 5 hp higher. Did that sticker really add 5 hp, or are there so many variables going on that a 5 hp variance from pull to pull is just common.

Check out the member dynos on here:

https://www.myg37.com/forums/engine-...no-sheets.html

A 5 hp/tq variance is extremely common from pull to pull. Heck, I think even halfway down the page there was someone who had almost a 20 tq variance from pull to pull!

Therefore, its almost impossible to prove a 2-3 hp gain on a dyno.... because according to the last time I got my car dyno'd, I added a sticker and it added 5 hp and 5 tq.

However, if the hoses do improve airflow and if they do decrease the air intake temperature a little, there would be a benefit. I view these similar to gounding cables. There is a benefit to them, but you arent going to see it on a dyno.... but for 120 bucks, is anyone really expecting a significant hp gain considering $300+ complete intakes sometimes LOSE power on the G37?

 

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^ Quote and caps lock FAIL!

 

 

if these were $100 or less, i would probably buy them.