So, last night I flushed my PS and upgraded it with a cooler, then I got bored, that progressed in stupidity, and the whole thing ended up with my car having no exhaust pipes after the cats. That's right, everything behind the cats is gone - the Y-pipe, the muffler, the tail pipe, everything It's pretty damn loud, but not abnoxiously loud so that I get pulled over. Now it seems that my guilty concience is getting back to me, so I oughttaask - is running so little backpressure (basically only the one created by the cats and the manifolds) gonna screw up something on the engine?
Announcement
Collapse
No announcement yet.
Backpressure
Collapse
X
-
you wont hurt a thing mang.............just dont sit in the car with it idling and the windows closed lol
1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)
please be patient, rebuilding an empire!
-
Ive almost always ran my cars that way. In my opinion its still to quiet.1989 Grand Marquis LS
flat black, 650 double pumper, random cam, hei, stealth intake, Police front springs, Wagon rear, Police rear bar, wagon front ,exploder wheels, 205/60-15 fronts 275/60-15 rears, 1 5/8" headers, 2.5" offroad x pipe, Eclipse front bucket seats, Custom floor shifter, 4.10 gears, aluminum driveshaft and daily driven. 16.77@83mph
Comment
-
those quad cats muffle things a lot. Did a water pump one one with just the H pipe and no mufflers and it sounded like it had mufflers on it still.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Comment
-
Aight, guys, thansk - open pipes it is for now. I have a cat-less dual exhaust I snatched from a junked cop car, I'm thinking of doing that with some small mufflers and pipes exitting before the rear tires, but that'll have to wait as I have some more urgent projects with the car.
As for the loudness - a kid at my school has an '89 Mustang LX with sideipes and no cats, and his car with the 2.5" Flowmasters sounds exactly like mine with cats only
Comment
-
I drove my car with just an h-pipe for a few days and even with cats that thing killed my ears. Doing 70-75 on the highway with an exhaust that dumped right below your seats was friggen hell.
But I must say, the super turbos I have on there now aren't noisy enough.-Matt
1968 Fairlane 500 - 1998 Camaro Z/28
Comment
-
Nitroracer, did you have any turndowns? I made mine by just cutting the old Y-pipe and swapping the left and the right, and although they're just a 45-degree bend they make a huge difference - the car is still decently loud on the outside, but inside is much better, I listen to my music just as loud/quiet as before, and I can hold a normal conversation without even raising my voice. Don't have to yell in the cell phone either The only thing I don't like too much is the low-frequency boom-boom rumble at low RPMs, but after driving at 45 (so basically idling in overdrive) for like 5-10 minutes it no-longer bothers me.
Chachi, I like your thinking. And taste for beer too
Comment
-
I sawed off my exhaust right after the Y-Pipe. It's loud at start up early in the morning (5am) when I leave for work. Now that it's colder outside, I don't like the exhaust blowing forward if there's a tailwind at a light. Looks like the car is on fire. I'll be finishing the exhaust soon. I love to look of cars with dual tail pipes when it's cold outside.
'90 Mercury Grand Marquis GS
Baseline 5.0L numbers totally stock, 123 rwhp, 239 rwtq
5.4L swap coming soon.
Comment
-
And WTF would be the point to ditch the muffler and the tailpipe, but to keep the Y-pipe? Low-end torque doesn't suffer much if you remove everything completely, besides now you're just dumping hot exhaust gases straight towards the tank, or at least the pressurized fuel line...
Comment
Comment