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Old 09-06-2010, 08:32 AM   #17 (permalink)
pgmomni
Camry MPG Modder
 
Join Date: Feb 2010
Location: York, Maine
Posts: 56

Camry CE - '00 Toyota Camry CE
90 day: 36.18 mpg (US)
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Ditto on the intake...

Quote:
Originally Posted by brucey View Post
Zerohour: I've simply removed my intake tract that is sucking air from the grill so now it sucks from the back of the engine bay. This saves a lot of engine clutter and does help it get up to temperature faster. There is no real need for the intake tract other than as a silencer on heavy throttle, but hell I like the noise. The extra availability of that side and the engine bay are a bonus on top of just the increased warm up times.
Cold air vs warm air and gasoline combustion.
Cold air is denser, more O2, more HP
BUT too cold air/intake on a cold engine and gas fails to vaporize well. Much bigger issue in the days of carb'ed engines. As another poster stated the cold air pre-warming was used for emmissions and I add cold start drivablity. Ditto for the coolant lines thru carb's and throttle bodies do keep them from icing as well as aid in maintaining a constant temp in them.

The best case is to pull in cold, dense air and then heat it up in the intake manifold. Many FE 4 banger Toyota engines do this by locating the exhaust manifold in the front and intake in back by firewall. By design exhaust manifold heat travels back across the head and further to the entire TB/intake manifold. While the air intake starts in the left fender pulling cooler air.
The Camry's intake manifold gets quite hot and being made of cast aluminum it believe it heats the air intake charge.

On my Camry removing the entire stock airbox/intake opens up space under hood. Car "growls" when you punch it like carb'ed engines from my youth.

I have a 4" chromed pipe the leads over to where stock intake entered engine compartment thru the left front fender. Has a 4" cone filter on it.

Its getting colder here too. 52 this AM with a high of 75 today.

Time to reinstalled the upper grille block.
I also in winter use a modified thermostat.
Take OEM stat, starts to open at 180, fully opens at 195.
By adding a ring of 12 gauge cooper wire under the spring in the base it raises the stat to start to open later and fully open at higher temp.
Takes some trial and error testing in a pot of boiling water to get right.
Too high a full open temp and the cooling fans will run too often negating grille block and need to load alternator more.


Overall the goal is to increase the entire under the hood temp to make it permanent "summer" time under the hood. Using Grille blocking, under body plates to limit cold airflow in/around engine while air intake remains free and open to pull cold dense air from left fender.

Pete
__________________
2000 Camry CE 5 speed 128+K. Best 37.0, Goal is to break thru 36 consistently(Attained). New Goal 38.
ScanGauge II, Unibrow(1 wiper) Air Intake, Mud flap delete, 3.5+" Front Spoiler, Full Moon Hubcaps(Lost). Upper Grille block. (New and improved Fall edition)
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