Thread: major mpg imrovement!!

alright here we go---
Scavenging:
-exhaust gases released into the header pipe create a pressure wave
-as this pressure wave travels down the length of the header primary tube, it is generating a suction wave inthe pipe leaving a low pressure area in the combustion chamber
-as the pressure/suction wave exits the primary tube, a reflective pressure wave begins traveling back up the primary tube and can enter the combustion chamber as reversion

ok so your right scavenging and backpressure are not the same but reversion is the same thing as backpressure

awww **** son, your badazz now

Originally Posted by dpzelenak

alright here we go---
Scavenging:
-exhaust gases released into the header pipe create a pressure wave
-as this pressure wave travels down the length of the header primary tube, it is generating a suction wave inthe pipe leaving a low pressure area in the combustion chamber
-as the pressure/suction wave exits the primary tube, a reflective pressure wave begins traveling back up the primary tube and can enter the combustion chamber as reversion

ok so your right scavenging and backpressure are not the same but reversion is the same thing as backpressure

Reversion and backpressure are not the same either.

I get about 15-17 city driving and 30-31 on the highway doing 85 all the way up north.

and there not how?
they both mean the same thing

...just close the thread? ugh

Originally Posted by dpzelenak

and there not how?
they both mean the same thing

No they don't. Why don't you actually google the term exhaust reversion and you will see how they are not one in the same.

Exhaust reversion is what makes big cam cars sound so lumpy at idle. It is essentially sucking air back in thru the exhaust. That is not the same as back pressure.

yea

ok here we go again
Reversion:
-inefficient exhaust systems allow exhaust gasses to be bottled up in the cylinder.
-the amount of air/fuel intake charge that can enter the cylinder is reduced.
-higher cylinder pressures from incomplete exhaust blowdown can force burnt gases into the inlet tract during intake valve opening.
-"mean exhaust flow velocity" is then decreased, reducing maximum engine volumetric efficiency

that seems to be what back pressure is

if its not the same then they sure the same concept

Originally Posted by dpzelenak

ok here we go again
Reversion:
-inefficient exhaust systems allow exhaust gasses to be bottled up in the cylinder.
-the amount of air/fuel intake charge that can enter the cylinder is reduced.
-higher cylinder pressures from incomplete exhaust blowdown can force burnt gases into the inlet tract during intake valve opening.
-"mean exhaust flow velocity" is then decreased, reducing maximum engine volumetric efficiency

that seems to be what back pressure is

No, its not.

Originally Posted by twol8uluz

Ok, so this was probably due to my own lack of knowledge, but when I first got this car a few months ago I installed a general (cheap) ebay cai. Since I've had the car I've been getting 16-18mpg at best. I thought there was something wrong with that and that I should be getting more. So today for sh*ts and giggles I decided to un hook my battery so it could "reset" itself. Holy sh*t!! Im now getting 24mpg on the freeway doin about 80mph! Guess I should've known about that from the beginning.
Plus my intake used to make a crazy sucking sound at idle, no more sound either. Maybe this is just common knowledge and I didn't get the memo, but hopefully others will read this and improve their mpgs as well!? .......ooooor am I just crazy and im imagining this? Lol

If this is true I didnt get the memo either cause I got that sucking sound but hmm Im'a go un hook my battery

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Other then the fact Dpzelenak is actually trying to explain his argument that's what this thread reads like.

thanks you- i think?

Ok, wow! Wasn't looking for an answer on how to totally destroy a thread. I just noticed a dif in my mpg's as far as my dic was reading out. Ok, im wrong, im a noobie...what do u expect? Lol. Thanx for answering my questions and correcting me......I think?? I don't care about the resonator, im not chopping it off. If u want to and thinks it helps, go for it. Im not knowledgeable enough to argue with all of you.

Five star thread. Would read again.