5" intake tube installed

[DARKANGELCAMARO]

Originally Posted by SUX2BU

Dyno test!

I like your idea, but its not worth the $100 for 3 pulls to see the miniscule gain. To me it is more about inexpensive efficiency and throttle response. Which, as I said in my original post, though slight, I do notice a difference in "off idle" response. It was something to do, (while I'm waiting for my Procharger to ship for my C6 Z06), and I only have $200 into the mod.

[clg_98ta]

I would get a dyno pull with a/f monitoring if I were you - your maf sensor is calibrated for the OEM pipe diameter and doesn't know the volume of air flowing past it has increased. This has probably leaned out your mixture and you probably need a new tune to "recalibrate the MAF".

[DARKANGELCAMARO]

Originally Posted by 2010 SSRS

Nice, that looks awesome

Thanks.

[DARKANGELCAMARO]

Originally Posted by clg_98ta

I would get a dyno pull with a/f monitoring if I were you - your maf sensor is calibrated for the OEM pipe diameter and doesn't know the volume of air flowing past it has increased. This has probably leaned out your mixture and you probably need a new tune to "recalibrate the MAF".

The dyno 2 weeks prior to this mod showed 12.5 AFRs across the board. I agree with you on the change of airflow, but I don't think its enough to not be compensated by the computer, since the filter still only allows for so many grams/sec.

[DARKANGELCAMARO]

I think I am going to do some data logging to take a look at IAT's and possibly get some MAF data.

[clg_98ta]

Originally Posted by DARKANGELCAMARO

The dyno 2 weeks prior to this mod showed 12.5 AFRs across the board. I agree with you on the change of airflow, but I don't think its enough to not be compensated by the computer, since the filter still only allows for so many grams/sec.

Going from 4" to 5" increases the area of a circle by 55%, and thus the volume of air flowing past by 55%... so that's how far off your maf is now.

[DARKANGELCAMARO]

Originally Posted by clg_98ta

Going from 4" to 5" increases the area of a circle by 55%, and thus the volume of air flowing past by 55%... so that's how far off your maf is now.

Dang! Insightful. I will definitely have to do some data logging and see about getting a wideband on it to get some AFR numbers.

[DARKANGELCAMARO]

Here's the data from a quick log for the highest MAF reading.

OAT- 70 degrees F

(Acceleration test - WOT)
Vehicle speed: 76.4 mph
IAT: 82.4 degrees F
MAF: 264.44 g/s

But logged a low of 78.8 degrees F highway cruising @ 70 mph.


8.8 degrees hotter than the outside air temp, I would say my heat shield works for real world driving conditions.

I will do some more logging later. I would like to see what the max IAT gets up to, sitting idling (for the given OAT).

[Fiftydriver]

It looks good for sure but I have one question. Since your running N/A, isn't the limiting factor of air flow into your engine at the throttle body?

Does the factory intake tube support enough air flow to support all the air the factory throttle body can handle? Just asking because I do not know and do not pretent to know better either way.

Just seems to me that your main limiting factor is the volume of air that can pass though the throttle body??? Again, just asking and not trying to offend in any way. It does look cool and very impressive.

[DARKANGELCAMARO]

Originally Posted by Fiftydriver

It looks good for sure but I have one question. Since your running N/A, isn't the limiting factor of air flow into your engine at the throttle body?

Does the factory intake tube support enough air flow to support all the air the factory throttle body can handle? Just asking because I do not know and do not pretent to know better either way.

Just seems to me that your main limiting factor is the volume of air that can pass though the throttle body??? Again, just asking and not trying to offend in any way. It does look cool and very impressive.

I wouldn't call a 90mm throttle body "limiting", but yes I agree with you. That is the only air "limiting" factor in my setup now, (besides the 4" MAF housing). I'm not saying this is the best thing ever, I'm just saying I think it is a worthwhile mod for $200 and I like the smash-the-throttle response.

The factory intake tube is sufficient to support the throttle body, but there are two things I saw had room for improvement, thus the mod pictured above. The two things are: 1. the chambers and "accordion" style connector cause turbulence in the airflow through the factory tube. Efficiency of movement of a fluid (air) is dependent on its path. 2. A larger volume of air readily available forward of the throttle plate, plus a large less restrictive filter, should yield a better off-idle response.

Again, I'm not making claims to have a better intake than anyone, just showing my project to spark ideas in others.

I do back my theories with 15 years of turbine engine/aviation experience and 17 years of automotive experience...

[Fiftydriver]

No, a 90mm TB is certainly not a limitation, compared to a few years ago, its HUGE!!!

Just figured without some way to push or pull air more aggressively through the TB, the TB will be what limites how much air will go into the intake.

My main question was simply, will the 90mm TB flow more air then the factory tube can supply? If so, I would think you would see some benefit. I just did not know if this was the case or not.

[axis]

Originally Posted by clg_98ta

Going from 4" to 5" increases the area of a circle by 55%, and thus the volume of air flowing past by 55%... so that's how far off your maf is now.

It looks like it uses the MAF section from the OEM tube or has one that is of that size. His car would run like shit if it was a full 5in in the MAF area, unless he was tuned for it.

[DARKANGELCAMARO]

Originally Posted by axis

It looks like it uses the MAF section from the OEM tube or has one that is of that size. His car would run like shit if it was a full 5in in the MAF area, unless he was tuned for it.

You are correct. OEM MAF section.

[litle88]

That's for finally agreeing to axis's post ...............One year later lmao. Sooooo what's been going on with this intake?