Cascade Crew

[83Z28BlackBetty]

So this project is WAY out (summer), but it never hurts to start planning and dreaming. I am running the stock clogafolds, cat and muffler and need to let this baby breath!

What are the differences between long tubes and shorties? Besides the length

Advantages to running a single big pipe or duals like Paul?

this is currently my daily, so i can't run straight headers, but i need to wake this thing up.

I come humbly to the masters. teach me.

~JAKE

[Dewey316]

To put it easily. tube lenght/diam acts the same on exaust as it does on intake, the length of the primary tubes will have a max effeciancy at a specific RPM, the longer the tubes the lower the RPM. Most long tubes are very good for mid-range power, while shorties are better for high RPM.

Now, on our cars packaging becomes and issue, so most people go the shortie route. The dual vs single, is again, how much fabrication and work are you willing to put in. The single exaust can support a descent about of HP, and you can buy a premade cat back. To get a setup like Pauls, you will have to pay someone to do it, or weld it yourself like he did.

--John

[blue89]

Stock crap-ifolds are designed do be cheap and connect the exhaust to the heads.

Shorties generally are made to take the place of the stock manifolds yet allow the exhaust to exit the heads unrestricted (reduce backpressure if you will)

Long tubes are DESIGNED to give you exhaust scavaging with little regards to your feelings. They are often times hard to install but the performance is the best. Many use true dual and require custom work to get them in.

Regardless of manifold type, the choice of single or dual is often debated. My opinion is that few people actually have cars that could benefit from duals. Unless your running serious power, a single 3" with mandrel bends is ample. Not to mention the extra weight you gain with going to duals.

I am running shorties on single 3" mandrel with dual 2.5" out flowmaster. Just because it was on the car when I installed the motor. I'm pretty happy with it mainly because it sounds good. I'm pretty happy with the car in general though.

[Twilightoptics]

Picking your exhaust is like picking a camshaft.

You have to match it to the engine or look at it being too big for now and ideal later, or ideal now and too small later.

With my engine I ran the same ET at the track with a single 3" cutout exhaust, as I did when I built my dual 3" back with mufflers. But that's my engine.

For your mild manored 250ish horse 350... a single 3" will do fine. If you go single 3" you should go shorties. It's easier to install and if you run long tubes into a Y pipe... well it's kind of like being the smartest kid with down syndrome. IMHO of course. If you run long tubes, they are cool and do help with scavaging. Ground clearance is compromised then you have to get into some fab work to get the duals to clear on the drivers side (as our cars were never meant for true old fashioned duel exhaust.)

If you go that route, use an X pipe.

I have shorties, I love them. No hassle with install... and believe me they've been on/off a dozen times.

[STEEL]

On TGO they have come to the consensus that this is the best shorty and y-pipe setup

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HOK%2D2055HKR&N=700+4294923429+4294908216+4294908198+4294840140+4294925008+115&autoview=sku

3 inch collector and Y-pipe, it will all bolt right up.

[Dewey316]

[STEEL]

Ya i suppose that is true.

[83Z28BlackBetty]

how much fab work does it take to run long tubes? I mean look who you are talking to, i'm not afraid of a little project.
I want to over build now so i don't have to redo it later if i throw in a 400SBC or whatever.
~JAKE

[91RSVert]

Depending on brand long tubes, some have ground clearance issues if you lower the car.


For someone who currently drags the stock y-pipe, I could never go to long tubes.

*does dance as headers are getting installed on 22nd*

[fiveoformula]

i would just get a nice shorty/y-pipe set then finish it of with a high flow cat(or no cat) and a manduaral bent cat back, to keep it simple with stock locations because there really isnt to much-if any difference in performance

[Dewey316]

I think it all depends on the motor. For example, Mikes motor needed the dual 3", the single 3" was choking his motor, but his is sort of the extreme. On the other hand, on a stock motor, you would probably lose power over most of the powerband, and may pick up something at the very top end.

Jake -- Do you have a full plan worked out, and what your goals for the car are, etc. It may make sense to spend the money now on something like Mike and Paul have, but if your goals are just a good cruiser with descent power, than you probably don't need it.

--John

[blue89]

[whispers]Kurfbird is selling a shorty with mandrel no cat setup for 150[/whisper]

I agree with dew (again). It doesn't make sense to spend $1000 on an exhaust you may never utilize. Especially when something that works for your current setup is so cheap.

[iansane]

[blue89]

Turbo headers =

Just leave the downpipe a foot long and open. Zero routing issues. Lol. I'd like to hear a turbocharged 350 with a foot long "exhaust".