I'm looking to put a new exhaust on my truck and want to find the best combination of pipe sizes and muffler. I can do most of the fabrication where I work, so taking it to a place to pay for a custom job shouldn't be an issue.

1994 Toyota pickup
3.0 litre V6

Right now my top choices are:
Flowmaster Super 40
Flowmaster 50 Series SUV performances
Flowmaster 30 Series Top Ten
All 3 in. inlet/3 in. outlet - 3 in. pipe to cat

Other choices:
Flowmaster 40 series (reg./delta flow)
Flowmaster 50 series (reg./delta flow)
Flowmaster 60 series (reg./delta flow)

Magnaflow stainless steel oval body ??
Borla ??

I'm looking for the best overall combination of power gain and mellow tone without being really loud. For anyone who's driven one of these trucks, you can attest to the fact that the acceleration is quite slow. One online review has the 0-60 time listed as 13.1 seconds. I'm hoping to break 12.8 with a new exhaust system. Anybody have any experience with these mufflers or any advice?
Pictures:

8/16/2007 10:31:29 PM

you should invest the money or put it into savings

you really want to drop your 0-60 time to 12.8? once it's that high what the hell is another .3 seconds

this is a bad troll attempt right - nobody could be serious about this

8/16/2007 10:42:23 PM

the 0-60 thing was just a joke , but I would like to find something that sounds good

8/16/2007 10:50:33 PM

imo
flowmasters sound like shit on anything non-v8
especially ohc motors.
i had one on my 4.0 and thought it sounded like ass.

8/16/2007 10:55:41 PM

Quote :

"Help me pick an exhaust system for my truck"

step one: dont ask the wolfweb. either ask toyota guys or use your brain and ears to make your own decision

8/16/2007 11:10:10 PM

step 3: buy real truck

my $20 cutout on mah ford pick-em up sounds better than any toyota i've ever heard.

8/17/2007 12:23:04 AM

step 2: ...

8/17/2007 1:34:05 AM

^

...
...
.....

profit

8/17/2007 2:33:56 AM

get a goddamned Thrush Glass Pack and call it a day. The longer it is, the deeeper the tone.


http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_16124_-1


...for example. shit has a perforated core that is the same diameter as the inlet/outlet of the muffler. Cherry bomb, Red Hots, and Purple Hornies are all similar as well (though some might have louvered cores... no fun) magnaflow and dynomax have some good straight thru ones as well. borla is just overpriced imho.


flowmasters sound weird on most anything other than a v8.... unless you get a 10-series race muffler ahaha that could wake the neighbors with the right setup.



If I were you, I'd keep an eye on ebay and get ahold of mandrel bent exhaust tubing for cheap and chop/cut as you wish

8/17/2007 5:54:34 PM

Leave it stock and buy gas.

8/17/2007 5:56:38 PM

Quote :

"get a goddamned Thrush Glass Pack and call it a day. The longer it is, the deeeper the tone."

Believe it or not, power-robbing hunks of shit. They create too much turbulence and generate too much flow stagnation at the walls of the pass-through tube. Pretty much all straight-through glasspacks suffer from this phenomenon. Hard to believe, ain't it?

Quote :

"flowmasters sound weird on most anything other than a v8.... unless you get a 10-series race muffler ahaha that could wake the neighbors with the right setup."

I beg to differ. I had a Flowbastard 60-series on my Datsun 280ZX...I fabbed up a 3" exhaust system from my own 2-into-1 homemade collector all the way back to the muffler in the tunnel (about where a cat would normally reside), up over the diff, and out the back. And let me tell you: that was one mean sounding straight six.

8/17/2007 6:10:36 PM

interesting about the turbulence and stagnation, it makes sense though. what about adjusting flow velocity with diameter? would that make a difference. I can understand stagnation and reversion in an odd shaped bend or something where the diameter is larger... are you talking about louvered cores or perforated cores or both?



you got me on the flowmaster thing. I think most of my animosity toward that brand comes from being around rednecks that thinks flowmaster is god

[Edited on August 17, 2007 at 6:31 PM. Reason : -]

8/17/2007 6:29:39 PM

Louvered cores are the worst. Still happens in standard perforated cores as well.

Flow velocity doesn't really have THAT much to do with it, though too much restriction, while increasing velocity (and possibly subsequent scavenging effect between pulses), can create a pressure head that pretty much negates any scavenging effect that the higher fluid velocity offers. Higher velocity flow may also change from laminar to turbulent flow much more quickly, and frictional losses grow exponentially.

Folks are always saying that backpressure is necessary for an engine to run well on the street. That's fucking baloney. Adequate exhaust velocity to provide good (or reasonable) scavenging of the cylinders is key. Resonant tuning to use exhaust pulse frequency as an aid in scavenging the cylinders properly (or adequately) is of secondary importance. Flow reversion, is, as you know, totally undesirable, though many car manufacturers have used a small amount of reversion (by timing valve opening and duration) to provide roughly the same effects as an EGR valve.

8/17/2007 7:24:02 PM

good info. I've a hard-on for exhaust tuning/theory, so this is cool stuff to me.

8/17/2007 7:37:32 PM

leave it stock so you dont take a beating when it comes time to trade it in

8/19/2007 2:49:30 PM

I believe you have me talked out of modifying it, tww

I checked some Toyota forums and didn't find much information

I'm thinking about taking it to the dealer at 150K to get the head gasket replaced since the 3VZE is notorious for bad factory head gaskets. I'll probably need some extra money to fix it when they screw something up. Runs like a champ now though.

8/21/2007 11:20:44 PM

grats

8/22/2007 8:14:22 AM

^^ Isn't that from a problem with the head bolts? Someone was explaining it to me a while back. Seems like all the 1990-1995 6-cyl 4Runners I've looked at had the head gasket replaced. Surprising since it's a Yota product.

8/22/2007 10:04:15 AM

BTW, i have had duals on my 89 since high school, and it's so damned annoying to me now that I know what good exhaust sounds like, every time I'm at uwharrie I'm looking for some nasty rock to rip the exhaust right of the truck... in fact i have never heard a good sounding 3.0 or 3.4 for that matter, on the 3.0 I'm pretty sure the stupid manifold crossover that doubles around the back of the motor that is partially responsible for the rather airy sound that the 3.0 engine's make, and for causing premature head gasket failure, basically you are much better off keeping it stock

8/22/2007 8:55:38 PM