Larger Head gasket=lower compression= Safer boost?

[Polygon]

Originally Posted by tibby01

oh, so the extra fuel acts as a cooling agent?

In a way, yes.

[thepolishmafia1337]

i apoligize for not elaborating my statement. what i ment was my friend put a jet for a 25 shot on the enrichmant side of the nos sys. and a 75 shot of nitrous. and when i said that lean=power i ment to an extent. i dont know if you guys ever played with the nitro rc cars or not but when your tuning the motors you "Lean" them out. not to the extent that you creat a nuclear holocost but enough to make it clean. the same when ever i tune my holley. i would much rather have a slightly lean mixture over a slightly rich mixture any day. when it is rich it boggs and shutters when the secondary's kick in. it makes much more power and runs smoother with a slighly lean conditon. just as an example.

[DeleriousZ]

wow ben... you the man... i need to get to know you better!

[ghost94]

Originally Posted by thepolishmafia1337

i dont know if you guys ever played with the nitro rc cars or not but when your tuning the motors you "Lean" them out. not to the extent that you creat a nuclear holocost but enough to make it clean.

IF u want your $300 nitro engine to last about 3 tanks of gas.
If you want it to last, However like 3 gallons or more, you run rich LOTS of smoke and oil in the exhaust about 270 degrees any hotter the sleave warps and looses compression. Hense, ruined block, and motor with no compression that wont idle. and they dont idle clean like that
they pop and spit now I Know who not to listen to

[duplox]

"slightly rich" is not to the point where it bogs, based on that "slightly lean" would be 1500*EGTs and spark plugs that last a few hundred miles. Most of you guys have the luxury of running EFI, which have oxygen sensors to make sure you never go lean. I run carbureators, if you go lean there is nothing to stop it! If I dont notice something wrong(high engine temps or pinging) my motor is fried. Maybe that is why I am so much more agaisnt a lean condition. Whenever tuning my carb I start WAY too rich and work my way back until i think its right. It takes a lot of time and being very careful. I haven't lost a motor yet, so I must be doing something right.

Yes, fuel acts as a cooling agent, but that isnt the main reason. consider adding NOS without adding extra fuel - you arent changing the ammount of fuel added, so the cooling should be the same(in fact much cooler since NOS cools the air when it is atomized), yet if you run without fuel enrichment you'll burn your engine for sure. It has more to do with the chemistry aspect of combustion. I don't know exactly why it burns hotter with a higher oxygen to gas ratio, but believe me and everyone else it does. As for temperature drops w/ fuel - Through a carbureator air temperature drops 40*F. Atomization of a liquid into a gas causes a large drop in temperature. Many people running draw through turbocharged carbureated engines inject a water/alcohol mixture into either the turbo's inlet or somewhere after the turbo, the atomization of the water/alcohol mixture causes a huge drop in temperature(you can't intercool a draw through setup, so this is the alternative...). The atomized water also helps cool some hot spots, and as a side bonus it cleans carbon deposits off the insides of the engine. I'm planning on using water injection on my turbo'd 351c, even though its not draw through, but every bit of cooling helps!

[thepolishmafia1337]

Originally Posted by ghost94

IF u want your $300 nitro engine to last about 3 tanks of gas.
If you want it to last, However like 3 gallons or more, you run rich LOTS of smoke and oil in the exhaust about 270 degrees any hotter the sleave warps and looses compression. Hense, ruined block, and motor with no compression that wont idle. and they dont idle clean like that
they pop and spit now I Know who not to listen to

you don't have to listen to me. but ive run like 10 gallons through this motor and haven't had a single problem. not even an over heating problem. i go with what works for me. I am not insisting that anyone do what i do, but i just offer past experiences. you deduct what you want to.

[ghost94]

Originally Posted by thepolishmafia1337

you don't have to listen to me. but ive run like 10 gallons through this motor and haven't had a single problem. not even an over heating problem. i go with what works for me. I am not insisting that anyone do what i do, but i just offer past experiences. you deduct what you want to.

In 19 years your experiences can probably be counted on one hand

[thepolishmafia1337]

Originally Posted by ghost94

In 19 years your experiences can probably be counted on one hand

In your 29 years you still can't do math. i don't know how many ASE test that you have taken but i am 2 away from being a master tech. and i already have eight or nine years exp working for my uncle on his prostock car. this may not make me qualified to share with you guys what has worked for me, but i couldn't care less about what some parts changer in flordia thinks about me.