[iansw]

this is for a 1998 jetta tdi
how much benefit for this

 

[Guest]

Your car already has a cold air intake. It takes in air from the fender and goes into the box. There may not be much improvement by removing the airbox because it would take in warm engine air.

I've seen CAI kits on ebay for tdi's but they cost about 250. for that price, I would just leave your car alone.

 

[chittychittybangbang]

2nd, for the price, I would suggest getting a chip for your car if it already doesn't have one . The chip for VW TDIs is the one no -brainer modification because it increases power easily, cheaply, and you need to fix the hose inside the ecu anyways.

Most of the site is organized into the FAQ, 1000 answered questions
http://www.myturbodiesel.com/1000q.htm

the ecu hose you need to check out is here.
http://www.myturbodiesel.com/1000q_how_to/a3%20b4/ecuhosechip.htm

 

[iansw]

cool thanks

 

[gino5]

All cars could get more power by adding a cold air intake. The colder the air, the denser it is , and the more power it can make.

 

[chittychittybangbang]

These cars already have a "cold air intake"

Look under your hood, all mk3-mk4-mk5 vw diesels have intake boxes that draw air from behind the headlight or fender area. Removing the intake air box will do little to improve your power, in terms of bang for the buck, it is very little as well. There's so much like, chips, or tires, that would improve the sportiness of your car over an aftermarket cold air intake.

 

[Guest]

2nd that, there's a writeup somewhere on this site which has pictures of airboxes. You'll see that there's something called a snowscreen which can get clogged and let in warm engine bay air in case the cold air intake tube gets blocked. check the FAQ section called 1000q.

 

[Stephenlhead]

Very big improvement with cold air intake

I knocked out the standard air box and bought a cold air intake online. It was an easy change over for the most part. Next up grade is the injectors

 

[Audi5000TDI]

I knocked out the standard air box and bought a cold air intake online. It was an easy change over for the most part. Next up grade is the injectors

Stupidest idea yet, because the moment you run boost, and compress air, you run into Boyle's law, whereas when pressure goes up, so does temperature. This is the whole reason why most cars with turbo's have huge intercoolers installed. If you want a cool charge at the valve intakes at the head (where it really matters) get a larger front mounted intercooler instead of a cold air intake, because the turbo charger is just going to heat it up anyways.

Kid's are all about stupid pipes, fart cans, noisy pop off valves, tubing, and hanging junk from their motors that looks cool, but does nothing. Complete waste of money, a cold air intake, on a TDI.

 

[sprstu]

There have been many threadds dedicated to this topic on mulitple forums, all have shown with dyno proof that the stock airbox on the TDI can not be improved upon. People have even gone as far as just putting a filter right on the turbo itself, no gain. The turbo draws such a huge amount of air and heats it up so much that the better upgrade would be a more effcient intercooler and even that is a rough call unless youre upgrading your turbo as well.

 

[dezel]

This little engine is only going to move so much air. Start with a (chip) then injectors.
Get out your wallet !! Upgrade turbo, stage 2 injectors and clutch, more $$. Dont forget the exhaust side. I call a cold air intake a dirt air intake, these filters offer very little protection in comparison to a quality filter.

 

[Alldieselused2bearicer.]

Stupidest idea yet, because the moment you run boost, and compress air, you run into Boyle's law, whereas when pressure goes up, so does temperature. This is the whole reason why most cars with turbo's have huge intercoolers installed. If you want a cool charge at the valve intakes at the head (where it really matters) get a larger front mounted intercooler instead of a cold air intake, because the turbo charger is just going to heat it up anyways.

Kid's are all about stupid pipes, fart cans, noisy pop off valves, tubing, and hanging junk from their motors that looks cool, but does nothing. Complete waste of money, a cold air intake, on a TDI.

Partly right. Cai isn't just to be a ricer. In a Honda yes. Not in a modded diesel. Although cai for tdi isn't truly cold air because is sucks air from hot engine bay it does provide more air flow. Up to a certain point stock air filter system is best but if your building power more than 2x stock cai is needed so you get enough air flow. So if your running stock people need need to upgrade. But if your doing injectors,cams, turbos and tunes I would get a cai. Intercooler are not a substitute for cai. Intercooler cool the air doesn't suck it in. I know these post are years old but I wanted to update the info. Also pop off valve I assume you mean a blow off valve. Which does have a purpose. When boosting and letting off the accelerator pedal the excessive air has nowhere to go but back causing turbo bark which harms your turbo. Adding a bov will keep your turbo running longer especially if your modded.