I can't believe I just read through 5 pages of bullsh!t and bickering, and still haven't seen a pic of an exhuast system worth a crap...

Big pipes are nice, but I live in pothole riddled PA...

I need a bolt-on exhaust system that's big AND doesn't drag on the ground...
I don't give a rats *** if it's singles duals, triples or quadruples...

Lets see some GODDAMN pictures !!!

 

Guys, I have the Dynomax dual exhuast kit on my car (1986 305 TPI) cam swap, headers, etc. The problem is in the back where the original muffler was, you have to fit 2 mufflers there ( I put Dynomax Super Turbos.) Now I lost probably 1/2" - 1" of clearance in the back. That's the only real problem with this. If I only had the single muffler system, it would probably have a lower rumbble sound. Now it just screams, and making it dual didn't do alot for power gains considering it's only a 305. The pipes cross over in the front to the passenger side of the car and makes its way to under the fuel tank. The way it is setup is that both pipes exit out of the drivers side of the car pointing backwards. So if you guys need more info, just reply and I'll message back. I'll even try to draw something up for you upon request.

 

I don't think anyone here is putting true duals on their cars so they can say " I have true duals!" I think everyone here is putting true duals on their cars because the sound is killer and the gains are better.

 

who cares give it up guys, its all opinions

 

Duals give more power and louder sound. Singles give a bit less power, lower rumble. It is all opinion, just do what makes you smile!

 

Hey.... I've lost count!!!!

Who's pissed the farthest so far?

This is the pissing contest, right? Or is that down the hall?

AJ

 

Ill just throw this in there.
I READ in a BOOK (aka the following is not MY EXPERIENCE, Just somthing I READ):
The LESS Backpressure you have, The MORE HORSEPOWER (not Torque*!) you will make... It says that open Exhaust will ALWAYS produce more NET horsepower than ANY form of Mufflled System. This does NOT mean more GAS mileage or TORQUE.
My experience: I find this to be true, so far.
Now, Heres an ACTUAL Experience of MINE:
With OPEN HEADERS my Car on a CHASSIS DYNO Produced an EXTRA 60-70 HORSEPOWER throught the ENTIRE Range than with a 3" Catback with Y-pipe. this is a FACT. But this could be due to the other fact I have a blower which DEMANDS open exhaust.

So what we have is a simple Driveability (gas mileage / low end torque) Issue + a simple Horsepower Issue. It seems a EDUCATED Decision is called for making the choice between the two, and this must include the question of how much will your engine want to breath, and do you want it to breath that well?
I will NOT recommend a Free-flowing Dual exhaust with little / no restriction for a stock 305
I WILL recommend a free-flowing Dual Exhaust yataa yataa for a Blown 355.
Get my picture? Take this as you will.

 

What I have seen in this post is 99% OPINION... Any dyno runs here folks? Sure you can start speaking pie r squared and volume. True, math is always right. But lets see it on a freakin DYNO. I don't care who wants to argue it, a single pipe is inferior if you are tring to breathe HIGH hp.. What's the hp number you need to make it a worthy investment??? I DONT KNOW... But I bet somebody does. I still have yet to see any pictures of setups which is how I found this worthless post....

 

Fact.. true duals.
Fact.. slightly better than factory ground clearance.
Fact.. I don't have any exhaust hangers yet.
Fact.. I'm still working on it.
Fact.. I just felt like making it.
Opinion/speculation.. I think it's going to be too loud for my taste.

 

This thread - comedy, pure comedy! Pics and information (facts backed up with real data) would be nice, but we could all use some good comedy every once in awhile!

To deadbird - how's the project coming along? Did you finish the over the axle bends yet? If so, what about the tips? Cant wait to see the finished product!

Good Luck and Godspeed to you all!

Mike (1bad91Z)

 

camarokev- your a ***!! You deserve that flame for coming into this 4 months after it happened. Yeah we did drop it. Same goes for dragracer!! Da both a yas shut da F*ck ups!!

Want some damn pics?? well here

 

and another. *note that turn downs have been cut off* Sounds much better. Also *note the H-pipe* in the last post.

 

"camarokev- your a ***!! You deserve that flame for coming into this 4 months after it happened. Yeah we did drop it. Same goes for dragracer!! Da both a yas shut da F*ck ups!!

Want some damn pics?? well here"



Whats that all about...... i never bashed your ideas just said do whatever makes ya happy, its all opinions if you want to mess around and make a dual exhaust setup like you did then go for it...(it does look pretty cool i must say)or if you just want to slap a exhaust on go with a cat back simple as that.... not saying one is better than the other calm down there junk

 

Plus MikeC.86Roc is the one who brought this up again after a few months, not camarokev400.

AJ

 

Uhh just wanted to clear something up, an engine running at a steady state (constant rpm for a while) won't see any velocity decreases down the pipe (as long as the diameter stays constant).

As gasses move down the pipe, they remain at a constant flow rate (what goes in must come out). The only thing that happens is the pressure drop increases as you go further down the pipe and encounter more resistance (more restrictions more back pressure).

I also think that a Y-pipe does add restriction but it helps more than it harms. I think it helps in scavenging similar to the way an X-pipe would, and we know those help.

 

I doubt that because a lot of the reason an x pipe helps is becaue it allows the exhaust to go the path of the least resistance. The y pipe only allows one direction which is just causing collision and turbulance.

Ben

 

I wanna talk on my opinions on this lengthy discussion.. I have seen some good arguements even some math in there.. LOL I don't think much of it plays any rolls in any of this discussion.

Valid points that I have seen.

1. single exhaust has a y-pipe which bottlenecks
2. Everyone knows that bends and such slow down velocity
3. some say that true duals bend alot to go over rear, why go over the rear??


Car craft did a dyno test on a Mustang ( I know different kind of car but the engines would be similar) They ran three tests.

Test one. full length equal headers ran open = 333hp / 304tq

Test Two. 2.5 pipes with full length Equal Headers through magnaflow mufflers with H-pipe = 323hp\296tq

Test three. 2.5 pipes with full length Equal headers through mangaflow mufflers with X-pipe = 335hp \ 302tq

Balancing and scaveging plays a huge role in speeding up velocity, Thus why X-pipe works better than H-pipe two flows crossing into one rather than sharp turns(bad). I myself plan on running those crazy flowtech full length headers cause it uses a tri-y system up at the engine utilizing the firing order and scaveging the air to speed it up and produce more mid range torque and hp. followed up by some 2.5 true duals, an x-pipe and then some quick flowing but modest decibel mufflers. I need it to flow well, sound good, open up under WOT.. I have plenty of pics of other peoples cars that I have seen in the past.. and I am including them.. Here ya go guys...

 

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