Has anyone seen or heard this set up?

[turbovanman]

I like the snap, crackle, pop. With my set up, its sounds throaty and threatening, hehhhhehehe"thumbs up

[Chris Faulk]

Quote:

Originally posted by turbovanman I like the snap, crackle, pop. With my set up, its sounds throaty and threatening, hehhhhehehe"thumbs up

I agree...when I had no rear pipes or the muffler my side-exit would set off alarms idling by. It was the funniest thing to drive into a car show and *dust* the parking lot! "thumbs up

My car now makes a lot less sound, but ppl hear me still because my car has such a deep rumble to it. I can't say rumble, because it sounds a smooth tone. Very deep.

[The S is Silent]

Quote:

Originally posted by 89daytonaTII believe me you still hear it. my setup is a 2.5" DP into a 3" ultraflo then a 3" side exit. decel = snap, crackle, pop

That is exactly what mine is going to be! Compare the sound to say...a rice pipe for me...I want to convince my buddy that it isn't going to sound riced out or anything.

[89daytonaTII]

Quote:

Originally posted by The S is Silent That is exactly what mine is going to be! Compare the sound to say...a rice pipe for me...I want to convince my buddy that it isn't going to sound riced out or anything.

LOL there is no way to even remotely compare the 2. and I don't know how i'd deswcribe the sound of it, but I know that you will love it once you have it on.

[purevl]

Quote:

Originally posted by turbovanman If you notice, even huge exhaust systems on NA cars don't crackle in the exhaust under decel, and they barely do it with open exhaust :big grin: [/b]

i have to disagree with this, i have been running my tbi with the exhaust completely cut off just in front of where the cat used to be, it is deafening under acceleration, but it is atleast 1.5 times as loud decellerating, even in neutral. incidentally, in case there was still any doubt, this also effectively disproves the myth that no exhaust on a n/a car is harmful. although it did burn through my power steering lines, i guess it was a little TOO short

[Chris Faulk]

This is not a myth subject my man...it's a well documented thing. Exhaust and N/A engines that is.

I have seen it PROVED on an engine dyno the *real* effects of the exhaust system on an N/A engine.

Too big of an exhaust WILL hurt performance. This is a known fact and cannot be argued. I won't go into the technical aspect of it because you seem to already think this issue is a myth so...

[T-REX]

I got my car back, not running it at high boost yet got to get this **** A/F gauge working. The car is loud, but it sounds good, more v8ish. The only thing is that in the car it is sooo loud and my interior shakes and rattles, I will take some of it out tommorow and see what it does. And for the crackling and backfiring, I don't have ANY.
Mike

[purevl]

i'm sorry, i should have been more specific. when i said harm the engine, i was talking about causing it actual damage from a lack of back pressure, not hurting the performance. i presume that the gist of what you are talking about is mostly tuning length? i understand that a more free-flowing exhaust is not always a performance advantage. the myth that i was referring to is the widely held notion that an engine, any engine, needs backpressure and i have yet to see this proven. sorry for the confusion, i'm new to this

[turbovanman]

You can't damage the engine. All you damage is the performance. Actually, I am wrong, stubbie exhaust-ie a header flange with a couple of inches of pipe then you can damage the engine otherwise no!!!

[Mario_Boost]

On most N/A engines, if you cut the exhaust right after the manifold or a few inches after it, you can say goodbye to your valves.

[speedyshelby16]

I still have the 2.25 swing value and 2.5 to muffler which is in the middle and few bends and out the side it goes. I only had it scap when the rear shock were bad. Replace them and haven't have a scap yet. The muffler I chose was the raptor from flow tech (holly brand). I never heard my exhuast snap crackle or pop.

[purevl]

Quote:

Originally posted by mister_boost On most N/A engines, if you cut the exhaust right after the manifold or a few inches after it, you can say goodbye to your valves.

this is the myth to which i was referring, if you are toasting valves in a n/a car with no exhaust, it aint because there's no exhaust. people seem to forget that if you make enough substantial changes to an engine's (any engine's) induction or exhaust systems, that the stock fuel and ignition systems aren't going to cut it. just because it isn't blown, doesn't mean you can make it breathe easier, without giving it something to burn as well. basically, what i'm getting at is valve problems are signs of something a little more serious than exhaust systems, or lack thereof.

[Chris Faulk]

Goodness how many times does it need to be said.

N/A engines and exhaust is a HIGHLY studied and documented issue. There's NO myth at all in any of this.

We used to have a rail that ran high 7's with a small-block Chevy 350. This engine dyno'd 560hp on the stand. One of the passes was with a set of headers only...the next pass was with the same headers only with the addition of 2ft long collector extensions. We ADDED a length of exhaust and picked up more than just a few HP...it was a very noticeable gain.

Any experienced motor-head will know why this occurs. In short it has to do with the exhaust pulsing back into the combustion chamber. With no exhaust the pulse back into the chamber will be much greater...hence lack of power or even burnt valves. Back-pressure in an exhaust lessens this affect. Studied and documented. I saw it in person with my own eyes on my dad's own engine. Just to prove the dyno-guy was no idiot...he's built several national record-holding engines, and has also dyno-tuned the Jeg's Pro Stock engine.

Will things need to be upgraded? Yes...but there is NO real gain in chopping the exhaust of a car that will never make *real* power. Put a nice 2.25 or even 2.5-inch exhaust on the car and leaves your worries to more important areas like the head...that's where the real power is going to be found.

[turbovanman]

[quote]Originally posted by Chris Faulk
Goodness how many times does it need to be said.

N/A engines and exhaust is a HIGHLY studied and documented issue. There's NO myth at all in any of this.

We used to have a rail that ran high 7's with a small-block Chevy 350. This engine dyno'd 560hp on the stand. One of the passes was with a set of headers only...the next pass was with the same headers only with the addition of 2ft long collector extensions. We ADDED a length of exhaust and picked up more than just a few HP...it was a very noticeable gain.

Any experienced motor-head will know why this occurs. In short it has to do with the exhaust pulsing back into the combustion chamber. With no exhaust the pulse back into the chamber will be much greater...hence lack of power or even burnt valves. Back-pressure in an exhaust lessens this affect. Studied and documented. I saw it in person with my own eyes on my dad's own engine. Just to prove the dyno-guy was no idiot...he's built several national record-holding engines, and has also dyno-tuned the Jeg's Pro Stock engine.

Will things need to be upgraded? Yes...but there is NO real gain in chopping the exhaust of a car that will never make *real* power. Put a nice 2.25 or even 2.5-inch exhaust on the car and leaves your worries to more important areas like the head...that's where the real power is going to be found. [/QUOTE

And when your right, your right and you are right. "thumbs up
Thats how Flowmasters work, exhaust pressure waves and sound pulses.

you can't burn valves with too little backpressure. you will hurt performance though, but it's not due to exhaust going back into the cylinder. it all has to do with cam overlap and scavenging. when you have too little backpressure, more of your intake charge gets sucked out the exhaust port. it actually cools your exhaust valve more than normal. the downside being that your cylinder isn't filled with the fuel/air as much as it should be. this must be the generally accepted idea as this is what is in any current high performance engine books (atleast the ones i have read and the ones my school uses).