Wierd idea...
#11
Senior Member
True Car Nut
Exhaust gases mave much more energy and can overcome obstructions much easier than the air coming into the engine. So in that sence, an engine needs more help getting air in than exhaust it out.
#12
Senior Member
Posts like a Supercharger
Join Date: May 2006
Location: Vancouver
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Actually, in an automotive situation, where the exhaust is carried from the front all the way to the back, the exhaust cools down as it gets to the end. The manufactuers design the exhaust systems to have a backpressure at the end, in order to create more heat in the pipes, so you would as a result have less dense air(read: lighter), which ELIMINATES backpressure when at operating temperatures.
So those ricers with huge mufflers actually lose horsepower.
Best is to have pipes coming out of your hood! But not too practical for the streets
I think that having something suck out exhaust gases would just increase engine power draw than put out more power.
In a two-stroke, the "valve overlap" is called scavenging, they use the supercharger to force out exhaust gases and unburnt gases, then fills the combustion chamber with clean cool air.
So those ricers with huge mufflers actually lose horsepower.
Best is to have pipes coming out of your hood! But not too practical for the streets
I think that having something suck out exhaust gases would just increase engine power draw than put out more power.
In a two-stroke, the "valve overlap" is called scavenging, they use the supercharger to force out exhaust gases and unburnt gases, then fills the combustion chamber with clean cool air.
#13
Senior Member
True Car Nut
Originally Posted by 94SLEeper
In a two-stroke, the "valve overlap" is called scavenging, they use the supercharger to force out exhaust gases and unburnt gases, then fills the combustion chamber with clean cool air.
#14
Senior Member
Posts like a Supercharger
Join Date: May 2006
Location: Vancouver
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
No, I mean a two stroke naturally aspirated uses a supercharger to attain 14.7PSI, since it has no way of filling itself with enough air. And yes, equipped with a supercharger(gear driven), its still considered naturally aspirated. Unless of course you have turbos on there as well or something.
No intake valves, just exhaust valves. And Its just Squeeze, bang and air through. Compared to the four stroke'* suck, squeeze, bang, blow.
You're benefits are quicker accelerations, instead of two rotations of a crankshaft for one cylinder to fire, you get one bang out of each 360 degree rotation for each cylinder. More response.
No intake valves, just exhaust valves. And Its just Squeeze, bang and air through. Compared to the four stroke'* suck, squeeze, bang, blow.
You're benefits are quicker accelerations, instead of two rotations of a crankshaft for one cylinder to fire, you get one bang out of each 360 degree rotation for each cylinder. More response.
#16
Senior Member
True Car Nut
We discussed it a little bit in this thread in February of '05. Could be interesting. I wonder if anyone has really played with the idea?
#17
Senior Member
Posts like a Turbo
Join Date: Oct 2006
Posts: 450
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by F14CRAZY
ieatfeet: OT, but are those '91 Reatta wheels?
#19
Senior Member
Posts like a Supercharger
Join Date: May 2006
Location: Vancouver
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Greyhare
The old school muscle car blowers, 4-71, 6-71, etc..., were originally exhaust scavenging blowers for industrial diesels.
#20
Senior Member
True Car Nut
Join Date: Sep 2006
Location: Somewhere south of Ottawa with your girlfriend driving faster then you.
Posts: 3,277
Likes: 0
Received 0 Likes
on
0 Posts
Ok sticking my nose in likely where i shouldnt.. but hasnt this recently been done by a company called STS ? its a turbo that uses exhaust gas pre muffler and feeds it back to the intake. the turbo was moved there cause like someone said the air by the end of the exhaust pipe is cooler rather then use a traditional turbo picking up hot air.