way high egt's

[dodge89shelby]

i've got a 2.2 hybrid w/ a gt30r turbo, fwd's 16v cal, and 3" ex. my problem is that my wideband shows 11.x under wot (full boost) but my egt's will pegg my gauge 1600deg. to me thats way too hot! anayone have and suggestions on how to get it down?

thanks
-James

[speeduphoria]

more timming
just watch for detonation

or alky/water injection

also you should have a 2000deg gauge because they are known to not be as accurate at the end of the scale

[cky]

egts in your case with good a/f will rise due to ignition timing, too retarted or advanced. egts go down when detonating as well so keep that in mind.

[dodge89shelby]

i know that i am not the only person who has a hybrid and im sure that they all dont have to run water injection to cool ther egt's. so which dorection do i need to go w/ my cams?

thanks
-james

[anonymous_user]

The posts above are talking about ignition timing, not cam timing.

How much boost are you running? What is your base timing?

[speeduphoria]

Quote:

Originally Posted by anonymous_user The posts above are talking about ignition timing, not cam timing. How much boost are you running? What is your base timing?

exactly

and whats your cr and fuel octane, that will help tell if its safe(not sure if teh 16v cals have knock sense?)

[dodge89shelby]

-20* timing i think... il have to check to be for sure....
-18psi un intercooled at the moment
-93 octane bp is all i run... i can get cam 2 but it'll kill my o2 sensors
-and cr 7.9:1

[jim34]

You shouldn't be runnining that kind of boost with no intercooler, and are you saying your running 20 degrees base timing ? if so thats way too much your gonna wind up with a bunch of expensive ashtrays

[Dusty_Duster]

Quote:

Originally Posted by jim34 You shouldn't be runnining that kind of boost with no intercooler, and are you saying your running 20 degrees base timing ? if so thats way too much your gonna wind up with a bunch of expensive ashtrays

+1

18psi is waaaaaaaaay too much boost without an intercooler!

[dodge89shelby]

y does it matter if i have an intercooler? the purpose of it is to make the air denser by cooling the air and thus making more power. i dont understand why its gona make me have "expensive ashtrays".

[speeduphoria]

hot air(along w/ hotter plugs, and other things) cause detonation

[jim34]

your fwd cal was ment to be run with an intercooler your probobly seeing intake air temps 100 degrees higher than what your supposed to and your timing is getting full retard from the detonation
Im just trying to help you keep your engine in one piece

[Ondonti]

Quote:

Originally Posted by dodge89shelby y does it matter if i have an intercooler? the purpose of it is to make the air denser by cooling the air and thus making more power. i dont understand why its gona make me have "expensive ashtrays".

If this is the way you are thinking right now you are in big trouble. I wouldnt even drive that car with how you have it setup.

[dodge89shelby]

no im not disputing... i was asking to learn! thanks!

but i did go check some things...
-my base ig. timing is @ 0* and has been sence the engine was built. like i said first i had to check that i wasnt forsure.

but Ondonit, y you say that? im looking for relitive information, not someone who want to just put their $.02 in w/out giveing any info to help. as for what i said. if you look up "intercooler" on Reference.com you see that without the long words i said the exact same thing! here ill cut and paste.

"An intercooler, or charge air cooler, is a device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing the amount of charge in the engine and lowering charge air temperature, thereby increasing power and reliability. It is also known as a charge air cooler"

now to the next part which i actually asked why this was b/c i want to know.. aka learn!

"It is also known as a charge air cooler, especially on larger engines that may otherwise easily self-destruct with high intake-air temperatures. "

so if someone would please be kind enough to give me some information w/out being a smart a**, i would GREATLY appreciate it.

sorry to the ones that are helping! its just aggaivating when someone is looking for help and gets a pointless post as that.

so please again. why will not running an ic at this boost level harm my enigne? cause knock due to the high air charge temp?

-James

[puppet]

Quote:

Originally Posted by dodge89shelby so please again. why will not running an ic at this boost level harm my enigne? cause knock due to the high air charge temp? -James

As you know ... the turbo heats the air as it compresses it. At the boost level your at the air charge temperature can be pretty high. 250-350*F
When air and fuel are injected into the cylinder they get compressed by the piston. Guess what happens to the temperature of the air and fuel? Yes, the temperature goes up as the piston approaches TDC. Now, if we're injecting hot air and fuel ... the mixture may/will ignite before the piston reaches TDC (because the compression stroke is heating the mixture even further ... remember?) This is pre-ignition and/or detonation.

So .. how would you try to stop this? Yep ... lower the air charge temperature before it is mixed with the fuel and enters the cylinder. Every degree you can lower the air temperature leaves a degree of temperature rise made available on the compression stroke helping to avoid lighting the mixture off too soon.

The closer you can get the air charge to ambient temperature, the better. Then it'll run just like an N/A with the benefit of a denser charge allowing you to burn more fuel ... making more power.

Heat is bad. Say it, ... heat is bad. What goes in hot, comes out hot

*Unless your trying something like Smokey did ... Put something resembling an IC on that thing or lower your boost.