exhaust

[pr0nst4r]

i don't have a pic, but it is like from the cat back is like in 1 foot sections and all leak all the way to the muffler that is in stock location. i can get a pic, but won't be til tomorrow because it's raining at the moment.

Are they rusted out? Or just poorly clamped on? If the pipe is in good condition, you can just take it to a shop and ask them to weld it, but that gives me a horrible image of a bunch of straight pieces from autozone welded to each other at weird angles. Generally a shop will charge per weld on something like that and it could be cheaper, if not a better deal, to get them to just fab you a quick cat back and you provide the materials. I have a shop I go to that if I bring the pipe, they'll do whatever I want and just charge me flat rate for bends and welds. comes out nice.

if an engine needs a little back pressure to run well, how do all those drag dudes get those motors to run with no back pressure? The pipes are no longer than your arm.

Have you also noticed that each individual carb on those things are as big as my thigh? And did you also take into account that they burn nitro? This is a race car you're talking about. COMPLETELY different subject.

[resuwrecked]

What the heck is it with this "my engine needs back pressure to run right" crap?? Backpressure is not your friend, kill it. now. put on the 2"-2"5 exhaust and you will be fine.

[pr0nst4r]

wow...

[resuwrecked]

wow...

do explain

[pr0nst4r]

Your flawed logic and lack of research astounds me, hence:

wow...

Edit: Ok, this deserves a real answer...

Back pressure regulates the release of exhaust into a slower stream, that keeps the exhaust valve temperature more consistent and that lengthens their life. Based on this statement, one can conclude that not only will you produce a better condition for your engine to run in, they produce better power because of running in that improved condition.

[resuwrecked]

my logic is that its just a b3 we're dealing with here. benefits of exhaust pulse scavenging and velocity through use of the stock sized pipe and awesomely engineered stock cast manifold are...?

Have you also noticed that each individual carb on those things are as big as my thigh? And did you also take into account that they burn nitro? This is a race car you're talking about. COMPLETELY different subject.

and this sure sounds like the words of someone who knows all of automotive engineering logic.

[resuwrecked]

weld your exhaust pipe shut and your engine will run forever and have more power? ever driven a car with a clogged cat? your argument is silly. ugh, why do i bother posting trying to keep someone from being misinformed that backpressure is good anyway, i gotta back up common sense, its funny, anyway...

[pr0nst4r]

my logic is that its just a b3 we're dealing with here. benefits of exhaust pulse scavenging and velocity through use of the stock sized pipe and awesomely engineered stock cast manifold are...?

I would agree that using the stock pieces are not for benefit, but think that a properly designed system, of a smaller diameter, would do better than blasted out straight 2" pipe.

and this sure sounds like the words of someone who knows all of automotive engineering logic.

First, never said I knew all.

Second, why would I always want to speak technically? Sometimes the analogy makes it better. Do you have a problem with joking around?

[pr0nst4r]

weld your exhaust pipe shut and your engine will run forever and have more power? ever driven a car with a clogged cat? your argument is silly. ugh, why do i bother posting trying to keep someone from being misinformed that backpressure is good anyway, i gotta back up common sense, its funny, anyway...

Dude, I'm pretty sure you're misreading what I'm saying.

My point is this, as referred to in my other post:

Too much backpressure is bad, yes. Too little back pressure is also bad (aka 2" pipe). You have to realize, like you said, that we're only dealing with a little B3. A 2.0L engine would probably be good around 2" pipe, but the B3 puts out a lot less exhaust. Backpressue is good, but in moderate amounts...

unless you have a turbo.

[resuwrecked]

First, never said I knew all.
Second, why would I always want to speak technically? Sometimes the analogy makes it better. Do you have a problem with joking around?

First you were trying to defend a loony idea pretty strongly by saying i was misinformed and second the analogy made no sense. a b3 and a race engine are both engines, they are both engines, and all engines function on the same principles.



Run the 2"!

[pr0nst4r]

Don't run the 2"

Insult my idea all you want, but it's unfortunate how it will turn out if you don't.

/gnight

[resuwrecked]

well this has been a nice discussion, so ill leave you with a research topic: exhaust gas reversion and its causes and effects.

[GenevaDirt]

2" would be fine but I know for a fact that bigger on a stock B3 will cause you to have less torque making the car sluggish.....and believe me....it is very noticeable. I have run it both ways and was very happy when I went back to the stock exhaust. Difference of night and day on take off and pic up when driving. Plus my gas mileage went down with the larger pipe.

[hofficergrover]

pr0nst4r i don't go to a shop i have all the tools to make my own exhaust just no bender i just buy the bends. the exhaust is a bunch of pipes from a parts store and all clamped together. i would weld them but see no matter what the 2" will be installed when i put the bp in it in the spring so if i just do it now i won't have to later.
GenevaDirt i would love to keep the stock just it is really bad and i don't like it, the 2" will be loud but it is put out the side of the car and not right under you and it echos inside the car and it sucks. the gas millage isn't a big worry because our yellow one has 2 1/2 and does almost 60 miles to the gallon and has over 200,000 miles on it and mine has way less than that. so i am not to worried but i will go over the exhaust and see if it's worth it to patch or just get rid of it. thank you all and i will let you guys know and get a pic later tonight i have to work so can't now.

[drddan]

Gotta put in my 2 cents! I have the stock 1.5 inch exhaust on my festy.
Here is an interesting post on what I have experienced as of late:

My muffler just blew out and guess what? With muffler blown out my festy suddenly got more HP and more gas mileage! I posted about my gas mileage run a week ago and didnt know it at the time, but muffler had already rusted and was leaking, didnt make more noise til about 1-2 days later. Well it was flyin up hiils, breaking tires loose on takeoff, and gas was 46 mpg, which i've never gotten before. My gas post states that this was due to all the work/components I put on, but now... I wonder...
This weekend I put on new muffler and gee... now it wont hardly climb a hill, lost most of its power, and generally is slow. Feels like i've lost 20 HP.
This I do know: engines need to breathe! In and Out. Obviously something is restricting about the festy exhaust system and maybe timing needs to be corrected to account for the different size exhaust's/different flows of different mufflers.
I know I WILL be changing to a bigger, less restrictive exhaust soon.
After thought: I still have the cat on there, and maybe its gettin plugged up, but the muffler blowing out shouldnt have had an effect if the cat is plugged up? Right? I'll be doing more research on whats happening with the exhaust.