Air intake info

[Mean Green]

Originally Posted by ChefTank

Your right! All the big turbo guys run a closed system... *stirs coals to stoke the fire*

Obviously they don't as we both know there is no closed system for the big turbo. You also run with an open filter for the increased air you need. You give up a little but you gain so much more with a big turbo.

[Mean Green]

Originally Posted by 85_305

And I thank you for proving my point. I completely agree, and could have TOLD YOU that for every 10* there is a 1horse drop. The discussion wasn't about power, but in fact economy. Which this article backed.



Yep, thats correct.



Not true at all. I mean, maybe in PT-Land.. but I've had several turbo cars.. one of them ran 12's/hi 11's depending on the day/tune. The turbo produces so much underhood heat that putting in a cold air intake is worthless since the second the air touches the hot side of the compressor it's instantly like 500*. Plus, an open filter sounds way better.



Good post.



Well I mean.. I dont know how much more to put it other than I personally gained 4mpg city driving putting an open filter on.. and when I drove it hard and had fun with it (always gotta break in that new toy/part!), it got the same gas mileage as before I put the intake on. Facts are facts buddy.

You are as bad as everyone else who comes on here spouting about how they gained mpg with new sparkplugs, an open intake, exhaust system, chrome bumpers, exterior decals, etc, etc. A 4 mpg gain with an open intake. What a joke. Go here PTCrew.com - Learn it or Burn it. and tell them that and when they tear you a new one try not to pout.

[Mean Green]

Originally Posted by ChefTank

Next time i will post a disclaimer when i am being sarcastic..... Meangreen knows i like to ruffle his feathers

Chef doesn't bother me. At least he knows his stuff unlike others. We're both Crew members so we like to play.

And CREWZIN a closed system is so you get denser air into the intake cause denser air means more power. That's why manufacturers do it. They know their stuff, too. You make a good point about the noise, but that is a small part of it.

[quicksilverdon]

Originally Posted by edsidders

When my old company skunkworks modified cars for the Mobilgas Economy Run We found out that higher engine temperatures slightly increased the MPG but that was from lower friction/viscosity from the lubricants and a slightly warmer combustion chamber. The air was brought in from a outside pick up located in the grill area as to get the coolest,most dense air charge,,a rainy day helped even more..This was in the days before fuel injection and electronic ignition..There were no computer systems to adjust the timing and fuel mixture.The same principles still work today and even better results are expected..The higher engine temperatures also help with the emissions... No I don't want to work anymore,,I'm RETIRED

I think somebody got engine temp and intake temp confused in the earlier thread....

Well, I get about 2 MPG more in summer than in Winter, and I believe it is because the engine computer richens the mixture with a decrease in air temp.
That I do get better MPG in summer is fact.

[85_305]

Originally Posted by Mean Green

You are as bad as everyone else who comes on here spouting about how they gained mpg with new sparkplugs, an open intake, exhaust system, chrome bumpers, exterior decals, etc, etc. A 4 mpg gain with an open intake. What a joke. Go here PTCrew.com - Learn it or Burn it. and tell them that and when they tear you a new one try not to pout.

Ok then I'm lying and I haven't owned near 40 cars and have no idea how to calculate gas mileage.

Originally Posted by quicksilverdon

Well, I get about 2 MPG more in summer than in Winter, and I believe it is because the engine computer richens the mixture with a decrease in air temp.
That I do get better MPG in summer is fact.

True. My mileage is ALWAYS worse in the winter in NY as opposed to summer.
People from the south cant say anything, and no 25* at night doesn't count as cold.

[edsidders]

Originally Posted by quicksilverdon

Well, I get about 2 MPG more in summer than in Winter, and I believe it is because the engine computer richens the mixture with a decrease in air temp.
That I do get better MPG in summer is fact.

The computer should keep the proper fuel/air ratio for the engine temp/intake temp.As it takes longer for a engine to warm up in cold weather it will run for a longer time with a richer mixture.This will be more noticable on short trips..

Most of the difference comes from rolling resistance,cold lube,cold tires,if in snow more rolling resistance than pavement,running the air cond as a defroster,,cold air is thicker than warm air therefore more aerodynamic drag and another thing it depends where the tanks are at your service station,,gasoline increases in volume as temperature increases,warm gas from underground tanks shrinks when pumped into a car tank in cold weather..just a few things out of many..

[edsidders]

Originally Posted by Mean Green

Obviously they don't as we both know there is no closed system for the big turbo. You also run with an open filter for the increased air you need. You give up a little but you gain so much more with a big turbo.

If you need the heat why do intercoolers work so good on a turbo system

[edsidders]

Originally Posted by Mean Green

You are as bad as everyone else who comes on here spouting about how they gained mpg with new sparkplugs, an open intake, exhaust system, chrome bumpers, exterior decals, etc, etc. A 4 mpg gain with an open intake. What a joke. Go here PTCrew.com - Learn it or Burn it. and tell them that and when they tear you a new one try not to pout.

There was a time that during the XXXXXX project we could put a masking tape stripe on the car and the next day everyone of the cars in the pits would have the same stripe and the magazine writers were talking about a new breakthru in vehicle dynamics..

[apexanimal]

wow... you made me come back... lol...


i understand the point about trying to reach a target combustion chamber temp... however, unless you have a way of measuring that, good luck trying to figure out what it is... the mix can't be too hot or too cold, and typically, a 180* tstat is a good way to help this, as is setting a proper plug gap, and a proper "cold" or "hot" plug range...

i think what you're getting at is that warmer air means less fuel is added to the mix - which you're correct about, but the problem is that it doesn't have as much power b/c of this... if you drive incredibly slow, with low load and low rpms, then this might help your mpg... however for the rest of the 99% of us...

since your mix is hotter, you'll need to put more pedal down to do what a proper sealed intake, 180* tstat, plugs and gap can do... just because you get more performance doesn't mean that it doesn't affect mpg... like a good exhaust system will



so basically... you're right in theory, but wrong about everywhere else...

[85_305]

But the thing is... 95% of people looking for better mileage, dont drive like the 99% of the "other people" you talk about. If somebody is after better mileage, they aren't going to buy stuff to enhance their mileage and still drive like a clown.

When I drive, my foot is barely resting on the accelerator pedal.