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CAI - so many questions, so little time!

 
Old 05-02-2018, 12:02 AM
  #1  
murtro
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Default CAI - so many questions, so little time!

Hi! I'm a complete newb when it comes to any performance bolt ons so please bear with me.

However the new GM "jake" very expensive cold air intake has peaked my interest. Doesn't affect warranty = good! Except I have a base stingray LT1... so it states 0 HP gain. If I'm gonna do this, it has to be for some reason other than $600 bling.

Questions:
- How can it have 30% better airflow but no HP gain? Has anyone done a before and after dyno test? Would a tune help?

- Instead of the new box, should I just get a green air filter and get the same result?

- Aftermarket - AFE or Vararam... any pros/cons between the two? They appear to say 17 - 20 hp gain however there seems some debate? Again is a tune required? If so - will a GM dealer perform it? Does an aftermarket CAI affect the warranty? I assume so as they seemed to make a big deal out of the GM OEM one not affecting warranty.


Much thanks for any guidance!
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Old 05-02-2018, 07:00 AM
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RyanC7
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Unless you are going to tune it with other mods don't waste your money. Do a drop in reusable filter if it is dirty.
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Old 05-02-2018, 10:14 AM
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davepl
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Long story short:

The factory filter flows enough for the LT1 but not the LT4. Replacing the filter therefore provides a power bump for the LT4 but not much at all in the LT1. Changing the tube hasn't shown any benefit that I've ever been convinced of, any benefit seems to come from the filter.

But not for the LT1, it's already pretty optimized.
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Old 05-02-2018, 01:04 PM
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If you want to gain from gm #84152141 go with a ported throttle body and a Corsa double helix cat less mid pipe . I like the stock parts . Its spendy . If you shop you can get it for 500 bucks .
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Old 05-02-2018, 05:33 PM
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Get anything but the new GM intake, which is snake oil at worst and spendy for barely any gain at best. You can do way better with Verraram, Halltech or AFE.
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Old 05-02-2018, 11:53 PM
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We've had plenty of happy customers with the AFE and Halltech. Next time we have a stock Stingray in the shop we should do a before and after dyno test on one of these intakes.
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Old 05-03-2018, 08:07 AM
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Originally Posted by spinkick View Post
Get anything but the new GM intake, which is snake oil at worst and spendy for barely any gain at best. You can do way better with Verraram, Halltech or AFE.
I really like the Vararam. The lowest cost of all of the intakes with a long history of a solid product. I was sticking with the stock box and green filter until GM released an intake this winter and announced it would require a tune on install from GM. That is no longer the case (tune) but it shows all the talk about nothing more to gain on the intake is not the case. For the LT4 GM puts in writing 11hp. What does the other intakes gain? There are alot of dyno runs showing gains. My LT1 is tuned so I know the Vararam is only helping not hindering. CAI is a touchy subject with the owners that afraid to do any modifications to their car except spend thousands on plastic engine dressing parts
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Old 05-03-2018, 08:28 PM
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https://www.corvetteforum.com/forums...with-pics.html
I installed the GM performance cold air intake, link with a few pics
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Old 05-03-2018, 11:19 PM
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Originally Posted by JUICED1 View Post
We've had plenty of happy customers with the AFE and Halltech. Next time we have a stock Stingray in the shop we should do a before and after dyno test on one of these intakes.
Yes it would be good to see the comparison.
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Old 05-04-2018, 11:23 AM
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What GMs filter says is, your not making more power by more flow. The LT1 is getting more than enough air for its power production. If your aftermarket filter is adding power, it’s probaly doing it by leaning out your A/F.
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Old 05-05-2018, 11:10 AM
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Originally Posted by rb185afm View Post
What GMs filter says is, your not making more power by more flow. The LT1 is getting more than enough air for its power production. If your aftermarket filter is adding power, itís probaly doing it by leaning out your A/F.
Sorry but I don't understand. All the air box can do is provide more or less air flow. The fuel source / injection and mixture is a separate system. How can any air box "lean out" the air flow other than just providing more air??

As I said, I'm a newb - so I may just be missing something simple here.

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Old 05-05-2018, 11:24 AM
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Check out the BMS drop-in filter.It's for the LT1 & LT4.Do a search.

Very high quality and it's a dry media.

I was one of the beta testers.I run it on my '17.

White=BMS,Yellow=OEM,Red=K&N

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Old 05-05-2018, 02:21 PM
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Baker, whatís your results? Is this on an LT1?
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Old 05-06-2018, 12:57 AM
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You will never tell the difference no matter what you do with the air-filter on an otherwise stock Stingray. Maybe more "sucking" noise will tell your purely subjective seat-o-the-pants it's more powerful and that might please ya.
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Old 05-06-2018, 08:19 AM
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With the BMS(LT1),I could tell that the delivery of power was smoother and acceleration off throttle was crisper.It's a subtle diff.

Some folks will say you can't tell the diff and maybe they can't,but inside any car,I base my eval on feel.

I've been a test & setup driver for many yrs.

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Old 05-06-2018, 08:33 AM
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IMO all CAIs are pretty much snake oil, especially for stock vehicles. Every dyno pull will give a slightly different result due to temps, humidity, "noise", whatever and I believe some of these sellers just cherry pick a favorable pull and advertise around that. And even if some are thoroughly and scientifically tested to eliminate variables you are talking a couple HP at best. Not worth the $$ they ask for these parts.

Last edited by raylo; 05-06-2018 at 08:35 AM.
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Old 06-06-2018, 12:45 AM
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Originally Posted by raylo View Post
IMO all CAIs are pretty much snake oil, especially for stock vehicles. Every dyno pull will give a slightly different result due to temps, humidity, "noise", whatever and I believe some of these sellers just cherry pick a favorable pull and advertise around that. And even if some are thoroughly and scientifically tested to eliminate variables you are talking a couple HP at best. Not worth the $$ they ask for these parts.
ever run a Haltech ?
20115 Z06 = 46Hp
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Old 06-06-2018, 09:03 AM
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Originally Posted by Avanti
You will never tell the difference no matter what you do with the air-filter on an otherwise stock Stingray. Maybe more "sucking" noise will tell your purely subjective seat-o-the-pants it's more powerful and that might please ya.
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Old 06-06-2018, 09:05 AM
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Originally Posted by dbaker
With the BMS(LT1),I could tell that the delivery of power was smoother and acceleration off throttle was crisper.It's a subtle diff.

Some folks will say you can't tell the diff and maybe they can't,but inside any car,I base my eval on feel.

I've been a test & setup driver for many yrs.

\db2
I'm sorry but that's all in your head.
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Old 06-06-2018, 09:17 AM
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The only reason I've considered a CAI is to eliminate the goofy looking stock tube with all of the odd chambers protruding off of it. For me, the Vararam would be the choice to clean up the looks of the engine bay, but I haven't pulled the trigger on one yet.
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