ALVETTE00

Anyone out there install one of these baby's?

Why do you have to cut the plastic radiator cover?

Thanks!
al

hotwheels57

You don't have to cut the shroud unless you want cold exterior fresh air to enter the hot engine compartment. Even with Z06 type screens or altered fog light surrounds, the intake can only draw so much cooler air from the outside. The cut shroud maximizes the effect, especially with forward movement.
If you install with the filter sitting on top of the uncut shroud, you have essentially a cooler air intake (just like a BLACKWING, HALLTECH or many other similar products).

NOS500

Actually I had to cut the shroud. otherwise I didnt have any clearance between the airbridge and the hood. Otherwise I probably wouldnt have cut the shroud.

klwray

Talk about timing. I just installed one on my 99 C5 this morning. I was very hesitant to cut the shroud, but as stated above, if you don't, it won't fit under the hood. I followed the directions to the letter, and everything went OK. Took about two hours. Cutting the shroud was the most time consuming. I used a 12-inch ruler, looking at the shroud from the opening in the hood from the front to make the 1/2 inch measurements on the top and side. One thing they do not make clear is do not cut the top vertical line on the shroud. You will make a total of three cuts: two sides and one along the bottom. The flap you cut will then fit the angle brackets provided in the kit. I drove the car afterward, and although there is debate on the forum that there is minimal HP increase, the car felt faster - maybe psychological! The shrouds are available as aftermarket, as the one I took off was a replacement piece. I only learned after I bought the car last month that it was involved in a front collision some time back, so the shroud was replaced. Hope this helps.

hotwheels57

Wow, I didn't realize the K&N FIPK was that much taller than the oem air bridge. I had a complete BLACKWING system, cut shroud with after market air bridge and "ice box" cover on my Z16 for a while. I know the after market air bridge was a tight fit under the hood insulator. I went back to the oem Z16 intake assembly with a drop in K&N and enlarged the opening to the top cover. Works as good as the BLACKWING and no darn intermittent codes.

Todd157k

I didn't cut mine either. The only problem was the angle of their bridge was off which meant the intake hoses they provided didn't quite work. I ended up using the stock air bridge, some intake hose from intakehoses.com and a couple of nitrous nozzles for that 'FRESH COLD AIR INTAKE" system.

klwray

Is there any truth to the K&N claim of HP increase?

NOS500

most likely not, as most manufacturers claims are false.

but I did feel a slight difference in throttle response, It makes an awesome "sucking" noise, and it looks really cool under the hood.

Was worth the money and installation time IMO.

ALVETTE00

Hey Guys...

I must admit, looking at the instructions it's not quite clear to this NooB what the heck they are cutting! I'm really thankful to NOS500 for the 3 cut only tip! Just to calrify...when you make the 3 cuts, I can envision the plastic flap opening downward and held in place by the brackets they provide? And I guess that's just about a 1 inch gap/opening to let cool air in?

This forum really is the best!

-al

timmmmay

Glad this was here - doing this same install this weekend - and had same questions.

danasmith2816

Given the better air flow of the k & n, the smooth connection of the air bridge to the throttle body instead of the stock accordian hose and the larger volume of the air bridge, the k & n would have to be an airflow improvement over stock even without cutting the radiator shroud. Just my humble opinion and my install. Lol

mrr23

Dyno sheet from their website

Stroker87

not sure what site that was on but I looked it up and got this one 11.35hp / 12.93tq witch i personally think is more believable 18+ hp from a intake is a lot for me to be leave (with out tuning)

http://b.cdnbrm.com/images/info/k_n/dyno_63-1050.pdf

danasmith2816

the 57-3020 dyno is from a 1999 non Z06 5.7L vette which may see that much increase.
the 63-1050 dyno is a Z06 specific dyno which you'll see less of a gain because the breathing and other things are already inhanced on the Z06.
basically the same CAI but on 2 different engines

mrr23

I downloaded and copied directly from k/n website scroll down to additional information

http://www.knfilters.com/mobile/mPro...?&prod=57-3020

The one you posted is just above the one I posted 2000 corvette

Looking at that page the 97-2000 all show 18.29 hp and 00-04 show 11.35 hp

mrr23

Having two different part numbers means somethings different. I wonder what it is?

Gordy M

When looking at comparisons with Dyno results you always have to look at what type of dyno was used. What is impressive is in 1999 there was VERY little tuning available and most of the ones available were not that well developed. Today you should see those types of gains and more with the advances in tools and learning curve of those doing the tuning. Turning the vette into a bottom breather will show better results when the car is moving and encapsulating the filter on the shroud will help even more. Still you will probably not see more than 20-25 hp gains. The hp gain is getting cooler air into the cylinder head and Denser and can contain more fuel in the engine chamber. Going to a smoother coupler couple doesn't help to any degree since the firmware in the PCM was established to compensate for it. When you add head, cam, headers, etc, then you will see greater gains.

mike venth

On my 01 coupe I have install an Aluminum Duel Air Intake with the Power Coupler.
With only the Duel Air Intake fuel mileage was the same. When I added the Power
Coupler I lost apmx. 3 to 4.5 miles to the gal. high way and Black-er EX. tips.. Read on the forum that because of all the smooth air entering the TB the PCM ?? thinks the Engine is running leaner??.. I spoke with a C5Z - CF member from Conn. who suggested a Comp tune from one of the mail it too folks. BUT,, thought I would wait for the new tune, until I get my Ported & Polished TB. Back.
Has any one else noticed or needed a tune just with the smooth Coupler installed ???

jackthelad

Don't know if they still do, but their web site used to show dyno pull results. That's how I found that the very early cars respond better to a free flowing intake than the later ones. Have to say, I probably believe those guys much more than many of the "added power" claimants, especially the exhaust guys. Aftermarket exhausts may sound and look better, but that's about it.

BTW, you cut the shroud to give clearance to the filter so airflow is not obstructed at the bottom.

Cuz13

Could it be the 97-00 and 01-04 use different size MAF'S?