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Cold air intake build?

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dpuns88

New member
I have a Pontiac grand Prix gtp and I am just curious about suggestions on ho to build a after market cold air intake system?
But first of what are the advantages truly I know that sounds crazy but I am not a really knowledgeable mechanic lol. I also am curious is a cold air intake system that can be ran throughout all seasons? I live in Michigan hence winter... Thanks very much...
 


stick cone on end of maf/throttle body and put the sensor w/e you want. strap the pcm down with zip ties. Gives the sc a nice whine if you have one and allows more air to come in\
can run year round
 
no point in trying to run a true cold air intake system best you can do is a short ram air intake its what every one does same results as cai and you can run it year round
 
The purpose of the intake modification is to make it as easy as possible for the engine to suck up air. The stock airbox is restrictive, much the way a Capri Sun straw is more restrictive than a milkshake straw. The more and faster air can get into the engine, the more fuel and spark it can use to make more explosions, which translate into power - and more efficient power.
 


SlowNA06 said:
The purpose of the intake modification is to make it as easy as possible for the engine to suck up air. The stock airbox is restrictive, much the way a Capri Sun straw is more restrictive than a milkshake straw. The more and faster air can get into the engine, the more fuel and spark it can use to make more explosions, which translate into power - and more efficient power.
Click to expand...
i DRINK MILKSHAKE FOR MO POWAAAA
 
Ginseng said:
i DRINK MILKSHAKE FOR MO POWAAAA
Click to expand...

and there like it's better then yours?

as said above OP there's lots of ways to go but read that simple intake thread should give you alot of options that won't cost 360.00 for a k&n sticker
 
Idk why it's so popular to just put a filter directly on the TB, I wouldnt recommend it. IATs have a drastic effect on timing advance and KR. With my K&N fipk which has a full heat shield and everything on, at the track with the headlight out. My IATs would climb to 150-160* while in the staging area and staging the car. When I launched the car my timing would be at 14*, by the time I hit 60 mph the headlight trick would start to work, IATs would drop to 110-100* timing would climb to 16-17*. Then by 100mph iats would get to ambient around 65-70* and timing would climb to 20*.

With a filter on the TB it would have only got 14* all the way down the track, the k&n wasn't much better other than when I had the headlight out. I'm building my own fenderwell intake with a giant K&N filter on 4" piping and I've only got about $120 into it. Check my build thread to see pics. http://www.grandprixforums.net/99-gtp-ugh-more-broken-stuff-more-work-6-60217.html
 


i'm learning the more technical aspects of engine performance on the fly so help me understand what you are saying anthony, please.

timing is increased as the engine gains more load (moves faster). so the spark has to detonate sooner to compensate for the fact that combustion is constant while the speed of the piston is not, otherwise the spark will occur after optimal pressure. no?

so what does the air temperature coming into the intake have to do with this as far as timing is concerned? isnt the timing controlled by how fast the crank is moving? it seems like intake temp is a reactionary effect rather than a cause effect, if that makes sense. meaning the cars computer works with whatever temp it gets coming in and adjusts accordingly.

i think i just thought of the answer......colder air is more dense and therefore there is more oxygen to ignite, making a "bigger" flame, thus increasing engine speed which requires advanced timing.

am i on the right track here guys?
 
It's a lot simpler than that. The PCM has a table that reduces timing by certain percentages based on high IATs. If the IATs are high the timing dips low, if the IATs are low the PCM doesn't add timing but it doesn't reduce it. You could go in and push the temp where the timing starts to be affected up but it is reduced for a reason because the car will be more prone to knock with hotter intake air.
 
so it adjusts timing based on preset parameters of air temp entering the car? (a kind of safety net if the temp is too high)

it seems like there are so many more variables to include, though. are these part of the tables?

i kind of thought the computer was analyzing and thinking but maybe it is more just taking info and doing an "if this, then that" type of thing?
 
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Simple as this based on the tables set in pcm the engine usually advance timing in colder weather but after or around 32 degrees its neutral till about 100 degrees then it starts retarding timing
 
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