cai vs heat shield?

[MMAFIGHTER121]

ok - so i've seen a few threads popping up lately with a lot of homemade intakes and most of them are routed underneath the stock airbox into the fenderwall and such... now i gotta ask which do you think is better?

the KKM w heatsheild (homemade cuz its the only option ) would have straighter shorter line of airflow whereas those fenderwall options would probably have a larger, more open and cooler air source, albeit with more bends in the intake and a longer route to travel.... which one do you think is the better choice?

 

[NYC LS8]

Put it outside the engine bay. Take it from someone who can monitor intake air temperatures in his car with a K&N with no heat shield. I saw intake temps of 176 last night (83 degress outside temp) while sitting in dead stopped traffic. Obviously at speed, the temperature declines to whatever it is outside.

Unless you get a perfect seal to the hood, you're still going to let hot air into the intake.

That's my $0.02.

 

[MMAFIGHTER121]

since i live in snow capital, usa i think i should stick with an in engine bay setup and use one of the tips to route the air in through tubing and create a tight shield like some of the other ones i've seen on the site...

 

[NYC LS8]

Like I said, putting tubing that routes air from the bottom of the car is pointless. The intake air temperature drops to ambient as you drive. It actually cools down pretty quickly. That's why you want a heat shield/actual cold air set-up - for the stop and go driving since that's when the air entering the intake under the hood is hottest. You're not going to get any cooler intake temps than ambient with a tube routing from the bumper.

 

[G-RELL]

Like I said, putting tubing that routes air from the bottom of the car is pointless. The intake air temperature drops to ambient as you drive. It actually cools down pretty quickly. That's why you want a heat shield/actual cold air set-up - for the stop and go driving since that's when the air entering the intake under the hood is hottest. You're not going to get any cooler intake temps than ambient with a tube routing from the bumper.

NYC LS8-so then what do you think is best setup, placing the KKM filter under the hood in a heat sheilded area with hosed in air, or having the fitler running out of the engine bay. i've seen a lot of different setups and was wondering about opinions on the best.

 

[NYC LS8]

I'd have to say that unless you get a tight seal up against the hood liner that outside the engine bay would work better. It gets extremely hot under there where you're looking at an exposed filter getting intake air temps close to water/cylinder head temperature (224 degrees is what's shown on my ScanGaugeII for both). I saw 190 degrees for the intake air temp yesterday in stop and go traffic while it was over 90 degrees outside.

 

[lincoln00]

and what intake do you have......kkm?

 

[NYC LS8]

K&N without the heat shield. Had the KKM, but someone on here was selling this for cheaper than it would be for me to buy some piping from the TB to MAF sensor housing. I bought it with the intention of running it into the fender with the stuff I already have, but haven't had the time.