thegame

https://www.corvetteforum.com/forums...ir-filter.html


Not expecting any real gains. Just saw the price and figured why not. Any downside?? All I'll have is a diablo 91 tune on my 15 z51 a8. Thanks

Jason 98 TA

Did you checkout the afe cold air kits? We have them in stock & they make a nice 10-12hp gains to the tire. I heard someone gained 6hp from filter only but I'm not sure I buy that. Could be market just to sell the part.....

Jason 98 TA

http://www.texas-speed.com/p-4400-af...-2014-lt1.aspx

thegame

Yea thanks Jason, I decided I don't want to mod this one. I only did the diablo tune to tune out the AFM and I just happen to run across this filter on here.

speedwaylemans

Do you have any dry filter kits for sale? Ready to order, thanks.

Thanks Derek, just ordered a dry one. Duh, I overlooked the drop down menu for the dry.

C2367

Bought a K&N on amazon for about 60 shipped but too soon to tell any improvement. You realy need to try both at the drags the same day with same conditions. The factory OE filter is made in Thailand.

Kracka

K&N, AFE, Airaid, and Green are all quality brands of drop-in air filters and should all perform about the same. I'm personally partial to AFE and K&N as both have served me very well in the past. On my C7 I had the AFE drop-in before upgrading to the complete AFE intake.

thegame

You the man

thegame

Hey Chris where can I get an AFE drop in filter, dry model. Their website says out of stock.

scottsh

Folks, my apologies for necro-ing a thread, but it's the closest to my question.

Philosophically, if just a high-flow air filter would make 5whp why wouldn't GM include one? It can't be purely a cost issue. I can't imagine on a $55k+ car (especially the z51) which prides itself on performance, that this would be a factor.

Is it an emissions issue? Is it a gas mileage issue? Something else?

I've put K&N filters on most of my cars in the past (vans, SUVs, sedans, etc.) but I'm kind of reluctant to swap out the 1-day old filter on my new C7.

marcouvo

Installed an Air-Raid dry filter (2015 C7 A8 with NPP) and noticed improved throttle response. The Air-Raid pleated section is 1/4" longer than the stock filter and the opening is 1/4" longer. The AirRaid appears to be a higher quality, more expensive piece than the stocker.

marcouvo

I believe it's cost. The aftermarket ones are a higher quality, which is easily seen looking at them side-by-side.

Another example, the C7 Z51 has cast iron exhaust manifolds and the C7 Z06 has stainless steel exhaust manifolds. Exactly the same, except for the material.

scottsh

It would be sad if that's true. hp/$ ratio would suggest to me that a high-flow air filter (assuming that GM could get them for half what I pay retail at least) would seem to make more sense than some of the other things they do in the name of performance.

The exhaust manifold thing feels different to me - the switch to stainless doesn't itself increase HP, but - I think? - is needed to handle the heat created by the higher Z06 engine.

meyerweb

I think any filter that flows more air is a trade-off, in that it's also likely to flow more dirt. If you drive in normal conditions, and don't put on a ton of miles, it probably won't really matter. But Chevy needs to consider all use cases, including the guy who drives 40,000 miles a year through Indian reservations in Arizona. You want the filter to be as effective as possible in that situation, even if it costs you a few horsepower.

I also suspect that any real horsepower gains you get are only at large throttle openings and high rpm, so the real world impact of a less restrictive filter isn't going to be something most people notice. In fact, I doubt most people will notice a 5hp gain at ANY throttle opening or rpm.

marcouvo

I read in another thread the stock filter in the C7, C7 Z51, and C7 Z06 is the same one. If so, that means our stock C7 filter can support 650 HP.

C2367

How would you feel any improved throttle response, if any improvement would be shown at the mid to high end.

xp800

I'm a but skeptical that the drop-in filters make any improvement at -stock- power levels.

My personal dyno testing showed basically a ~10HP gain with the full aFe CAI which has a much larger filter than stock. The smaller filter area on an OEM size filter and other intake tube irregularities make it unlikely IMO that the drop in style is comparable. For the aFe setup there was no difference on my car with the aFe oiled vs. dry filters on an otherwise stock setup. Modified cars this may be different.

Details and more here: https://www.corvetteforum.com/forums...eaponx-tb.html

This compares the stock (Run1) vs. aFe CAI on the stock (Run14):

C2367

Any increase or decrease would be seen in the 1/4. Dyno is nice to look at but for a 5-6hp it would be hard to see. On a good day you could run 2-4 tenths better and 1 or 2 mph on a stock C7. Don't except much from the air filter but if you get a 1/2 of a 10th and 1/2 mph then it would be nice fo r a $60 investment.

xp800

Agreed. For the $350-400 the aFe can be had for, the increase in the aural pleasure of the loud pedal, snappier throttle response, and cleaning up of the engine bay make the minor HP gains more of a bonus than an outcome IMHO.

My dyno days and posting of my data was more for personal entertainment and quantifying independently the minor bolt ons for the benefit of CF. In all cases the gains on my car, if any, were half or less than claims.

MrGTC

Thanks for sharing your info for the rest of us. 10rwhp/ 10tq is actually a decent increase for an intake. I used to drive Japanese and Euro cars and aftermarket intakes made even less of a difference.