Irresponsibly Large Exhaust Piping and 3800 Power - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 02-23-2008, 10:42 PM   #11
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

So you're going to waste horsepower by increasing the load on your alternator to gain horsepower?

It'* all give and take, nothing for free.

Why don't you just keep things the way they are (the right way) and call it good?
willwren is offline   Reply With Quote
Old 02-23-2008, 11:04 PM   #12
Senior Member
True Car Nut
Thread Starter
 
radomirthegreat's Avatar
 
Join Date: Sep 2006
Location: Indianapolis, IN
Posts: 4,606
Thanks: 0
Thanked 0 Times in 0 Posts
radomirthegreat is on a distinguished road
Default

Supposing that I have flying batteries above my car hooked up to a Shop Vac that sucks exhaust straight out of the exhaust ports, would I see a benefit?

And more realistically, does it make sense to imagine a highly heat resistant fan in the exhaust pipe that sucks exhaust gas out?
radomirthegreat is offline   Reply With Quote
Old 02-23-2008, 11:10 PM   #13
Junior Member
 
Join Date: May 2006
Location: BonnevilleHell
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
clm2112 is on a distinguished road
Default

Quote:
Originally Posted by radomirthegreat
Is this practically how exhaust gases should flow as well?
I like describing the process as water in a pipe, but the highway analogy works pretty well too.

One trick to getting a good basic exhaust system is to make an effort to have all the header tubes the same length between the flange and the collector. The rationale being that the velocity of the gasses comming out of each cylinder port are about the same, and since no two cylinders fire at the same time, each pulse of moving/expanding gasses hit the collector alone and have full use of the entire diameter of the pipe to expand in. That'* just a starting point though. The worst exhaust is the log styles with unequal lengths...they usually only work right in a narrow rpm range before the pulses start hitting each other.

Scavaging the exhaust gases out of the cylinders is good, but it is more a function of the camshaft and exhaust runners within the head rather than the header tubes. The best way I can describe this is a siphon hose... the expanding exhaust gasses behaves like a fluid..get it moving in the right direction and it'* own mass will keep it moving. This happens within the heads. It also needs an open intake valve to let air into the cylinder at the same time the exhaust gasses are trying to suck it out. (Overlap of the intake & exhaust cam lobes allows this to happen.) A good header system can promote it or kill it, but the action of scavaging the cylinders takes place at the exhaust and intake valves.

As a demonstration of exhaust scavaging, listen to the next rice rocket that passes you and downshifts into a corner...lots of time you can hear a popping noise in the exhaust note.. that'* the sound of scavaging the cylinders...not only is hot exhaust gasses going out the heads, but a little of the fresh mixture is getting sucked across the head and out the exhaust port too, lighting off inside the hot headers and making the POP! noise.
clm2112 is offline   Reply With Quote
Old 02-24-2008, 12:27 AM   #14
Senior Member
True Car Nut
Thread Starter
 
radomirthegreat's Avatar
 
Join Date: Sep 2006
Location: Indianapolis, IN
Posts: 4,606
Thanks: 0
Thanked 0 Times in 0 Posts
radomirthegreat is on a distinguished road
Default

clm2112, that'* why you're the gearhead. Thanks so much! I think I now understand. I'll find some more stuff to read over time, I'm sure, but I should be good for now. Thank you all very much for your participation!
radomirthegreat is offline   Reply With Quote
Old 02-24-2008, 12:43 AM   #15
Senior Member
Posts like a 4 Banger
 
Join Date: Oct 2007
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
stwagner is on a distinguished road
Default

Now, does anyone know who makes good street headers for the '01 SSEi.
stwagner is offline   Reply With Quote
Old 02-24-2008, 11:52 AM   #16
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

That'* a bit off topic, but the short answer is:

TOGs (The Other Guys)
SLP'*
PaceSetter (lowest quality, cheapest price)
willwren is offline   Reply With Quote
Old 02-24-2008, 12:32 PM   #17
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

That'* why I didn't notice a drop in torque when I removed my cat. I installed the TOG'* at the same time.

Quote:
"If you're running a turbo or supercharger, there'* no such thing as an exhaust that'* to big," Scott explains. For forced induction, the bigger the better.
2000SilverBullet is offline   Reply With Quote
Old 02-24-2008, 07:23 PM   #18
Senior Member
True Car Nut
Thread Starter
 
radomirthegreat's Avatar
 
Join Date: Sep 2006
Location: Indianapolis, IN
Posts: 4,606
Thanks: 0
Thanked 0 Times in 0 Posts
radomirthegreat is on a distinguished road
Default

Well, does that mean I can put a 4" straight pipe out of the back of my catalytic converter? What if I put in a pipe so big and yet with enough clearance that it can fit a heat resistant fan big enough to provide some vacuum?
radomirthegreat is offline   Reply With Quote
Old 02-25-2008, 12:09 AM   #19
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Quote:
Well, does that mean I can put a 4" straight pipe out of the back of my catalytic converter? What if I put in a pipe so big and yet with enough clearance that it can fit a heat resistant fan big enough to provide some vacuum?
You crack me up Radomir.
2000SilverBullet is offline   Reply With Quote
Old 02-25-2008, 12:41 AM   #20
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Thank you, Paul. I just didn't have the heart.


Radomir, what exactly are you after? A larger exhaust diameter than BadSSEi for bragging rights?

Or do you want performance?
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Large California Fires Picture (1200x1400, be warned, large) Bonneville92V688 Lounge 2 10-24-2007 12:56 AM
S1 L67 heater core piping vital49 1992-1999 2 03-14-2006 11:03 PM
Another Bonneville exhaust clip (3" piping -stock muffl OLBlueEyesBonne Your Other Rides: Pics & Videos 15 02-26-2006 04:05 PM
95 SE Exhaust Piping triple18 Performance, Brainstorming & Tuning 4 04-23-2005 03:42 PM
Large golden car, large golden problems largegoldencar 1987-1991 12 02-09-2004 10:06 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:36 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.