Ricer CRX or not?

[audioholic 5,000+ posts]

Actually, you can have too little back pressure too. It depends on the head(s) flow characteristics, fuel system, etc.

 

[infamous_e46 5,000+ posts]

rattle can that ho3 flat army green and have an artist draw rivets on that ho3

 

[Johnny Law.Lulz 5,000+ posts]

Actually, you can have too little back pressure too. It depends on the head(s) flow characteristics, fuel system, etc.

Back pressure is stupid. The more it flows, the better off it is. Anyone who says other does not understand that a motor is a scientific pump that makes power by breathing in and out.

Check out sbftech.com if you believe in back pressure. A lot of good reading on there.

 

[whitedragon551 5,000+ posts]

This thread is full of lulz and trolling.

 

[Johnny Law.Lulz 5,000+ posts]

Back pressure is stupid. The more it flows, the better off it is. Anyone who says other does not understand that a motor is a scientific pump that makes power by breathing in and out.
Check out sbftech.com if you believe in back pressure. A lot of good reading on there.

Edit: I guess you must be a member. Nevermind.

 

[snoopdan 5,000+ posts]

much bitching ITT

 

[audioholic 5,000+ posts]

Back pressure is stupid. The more it flows, the better off it is. Anyone who says other does not understand that a motor is a scientific pump that makes power by breathing in and out.

Things are a bit more complicated than that. Back pressure, as it relates to flow velocity, has a benefit to the system. The exhaust gases that are released into the manifold/header move away from the exhaust valve as it closes. This creates a low pressure zone behind the exhaust valve, that upon the completion of another power/exhaust cycle, will help exhaust gases from exiting the combustion chamber once the exhaust valve opens again. Its popular these days to denounce any and all back pressure in an exhaust system, because 'flow is everything', but that's merely an over simplification.

 

[audioholic 5,000+ posts]

dbl post

 

[Johnny Law.Lulz 5,000+ posts]

Things are a bit more complicated than that. Back pressure, as it relates to flow velocity, has a benefit to the system. The exhaust gases that are released into the manifold/header move away from the exhaust valve as it closes. This creates a low pressure zone behind the exhaust valve, that upon the completion of another power/exhaust cycle, will help exhaust gases from exiting the combustion chamber once the exhaust valve opens again. Its popular these days to denounce any and all back pressure in an exhaust system, because 'flow is everything', but that's merely an over simplification.

So are you telling me if all else is the same. That a mustang with a 302 will perform better with long tube headers and a full 3" exhaust kit than it will with open long tube headers. Or that the same mustang will perform better with long tubes as opposed to short tubes ?

 

[audioholic 5,000+ posts]

So are you telling me if all else is the same. That a mustang with a 302 will perform better with long tube headers and a full 3" exhaust kit than it will with open long tube headers. Or that the same mustang will perform better with long tubes as opposed to short tubes ?

I think if it was as easy as picking the highest flow items off the shelf and bolting them on, we'd require a lot less trial and error finding the best combination to get us down the track the fastest. Are you telling me that putting the biggest carb/throttle body and exhaust on an engine you can physically fit will always result in better performance?

 

[audioholic 5,000+ posts]

And actually, what I was telling you is a little low pressure behind the exhaust valve is a good thing. Is getting specific a problem here?

 

[infamous_e46 5,000+ posts]

i have a str8 2.5 exhaust in my civic....you dont need back pressure but open header only really helps in a fully built race motor not some redneck in a mustang with autozone decals

 

[Johnny Law.Lulz 5,000+ posts]

I think if it was as easy as picking the highest flow items off the shelf and bolting them on, we'd require a lot less trial and error finding the best combination to get us down the track the fastest. Are you telling me that putting the biggest carb/throttle body and exhaust on an engine you can physically fit will always result in better performance?

Biggest carb and throttle body cannot be compared to biggest exhaust. A too big carb/ TB can cause a motor to run rich. An exhaust is on the out side, not the in side so its a different concept. But i understand the point you are making.

And actually, what I was telling you is a little low pressure behind the exhaust valve is a good thing. Is getting specific a problem here?

In all honesty, your post made little sense to me. I wasn't going to argue with a post i didnt understand, so i made a rebuttle post asking the question that had to do with my stance on the back pressure idea.

i have a str8 2.5 exhaust in my civic....you dont need back pressure but open header only really helps in a fully built race motor not some redneck in a mustang with autozone decals

That must be ignorant mexican logic. Must be why 10.5 cars use exhaust systems and top fuel dragsters run open headuers. Them dumbazz redneck top fuelies need to pay attention to 10.5 guys huh.

 

[infamous_e46 5,000+ posts]

Biggest carb and throttle body cannot be compared to biggest exhaust. A too big carb/ TB can cause a motor to run rich. An exhaust is on the out side, not the in side so its a different concept. But i understand the point you are making.


In all honesty, your post made little sense to me. I wasn't going to argue with a post i didnt understand, so i made a rebuttle post asking the question that had to do with my stance on the back pressure idea.

That must be ignorant mexican logic. Must be why 10.5 cars use exhaust systems and top fuel dragsters run open headuers. Them dumbazz redneck top fuelies need to pay attention to 10.5 guys huh.

you stupid fuqq i am referring to your cousin over there in a 94 auto mustang gt with a k&n sticker and open header

 

[audioholic 5,000+ posts]

Biggest carb and throttle body cannot be compared to biggest exhaust. A too big carb/ TB can cause a motor to run rich. An exhaust is on the out side, not the in side so its a different concept. But i understand the point you are making.


In all honesty, your post made little sense to me. I wasn't going to argue with a post i didnt understand, so i made a rebuttle post asking the question that had to do with my stance on the back pressure idea.

That must be ignorant mexican logic. Must be why 10.5 cars use exhaust systems and top fuel dragsters run open headuers. Them dumbazz redneck top fuelies need to pay attention to 10.5 guys huh.

Okay, so are you telling me the biggest exhaust possible will always result in increased performance? Why have headers at all then, why dont race cars simply down straight out the head's exhaust port?

Not sure what you didnt understand about me discussing the low pressure zone. Feel free to ask if you want. Im leaving soon, but I can always respond tomorrow.