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Old 09-10-2006, 11:53 AM
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Straight pipes anyone?

Ran straights on lots of cars over the years and will keep on keepin on but have never ran them on high horsepower cars. Has anyone here done that and got good results with power and not too much noise? I know there are lots of good mufflers out there but I'm all about not using them and still having a decent sounding system without drone and exessive noise. I've spent good money for supposedly good mufflers only to have a sound I didn't like and droned inside the car. Would like to hear some ideas from the ones who do this on how to make a nice sounding straight system. No need to mention vehicle inspection please.....

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Old 09-10-2006, 05:21 PM
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Straight pipes !!! Love em but the local Gendarmes don't.. Back in the day (circa late sixty) I had a Studebaker Lark with a big cube GM motor in it, 3 1/2" belled tubing from the headers to midway past the rear axle. On a clear morning my folks could hear me fire her up. 5 miles away!!!

Now your best bet, if you want loud, is some of the circle track mufflers from somebody like Speedway Motors..
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Old 09-10-2006, 06:57 PM
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On my '93 Silverado I have a .060 350 with headers. The cat convert is off and in it's place is a Thrush straight thru muffler (looks like the old Cherry Bomb muffler) with 3" exhaust. It has a nice rumble to it, but relatively quiet driving down the road with no droning noise. The muffler has just enough small bumps on the inside of it to break up the air flow and reduce the loudness. Most that hear it thinks I have Flowmasters.
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Old 09-10-2006, 10:29 PM
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I was recommended some alternative mufflers called Force. Supposed to be the same technology as Flowmaster but without the price. I have dual exhaust w/ no cat conv. and 2 1/4 exhaust on my 83 K5 Blazer and am completely happy with it. I can idle/cruise and it is stock sound in volume but when I get on gas it gets loud fast. A real head turner.....

Just my 2 cents worth...
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Old 09-11-2006, 04:31 AM
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In the fifties, the straight pipes trick was to weld a washer into the end.
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Old 09-11-2006, 06:03 AM
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I have Moroso spiral flow mufflers.
http://www.moroso.com/catalog/catego...?CatCode=35001
I will probably be replacing them with something next year. They are very free flowing and have a nice sound but they just done fit very well on the Fiero. They are about the same size as a cherry bomb but dont have any packing to blow out. The steel really needs coated with something as they will rust if not treated. I may try adding some resonant tips to them first the I dont think that will tone them down enough.

you can hear an mp3 from my website
http://web.tampabay.rr.com/jakedragon/sounds.htm
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Old 09-11-2006, 02:35 PM
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Quote:
Originally Posted by BillyShope
In the fifties, the straight pipes trick was to weld a washer into the end.
A little more detail on this method please.
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Old 09-11-2006, 05:48 PM
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Quote:
Originally Posted by Henry Highrise
A little more detail on this method please.
Can't add much. A large washer was welded into the exhaust exit. Made quite a difference in loudness, but...so I was told...didn't affect performance all that much. Never did it myself, so I can't offer any dimensions. Maybe another old timer can offer a "for instance."
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Old 09-11-2006, 09:04 PM
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Never did this to any of my systems but seen it done on other's cars and that's placing 'crimps' about every 18" to reduce noise. The deeper the crimps, the more quiet it is but it will also put more backpressure on the engine. The key is to make very light crimps so it doesn't reduce the flow. Most of the flow is more towards the center of the pipe anyways so light crimps won't slow it down much if at all but will make a difference in sound.
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Old 09-12-2006, 09:53 AM
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Go ahead and run straight pipes.

I figure I might as well myself...I just installed 2.5" pipes, Dynomax muffler and an expansion chamber (in place of the catalytic converter).

Stopped by the shop on the way home yesterday, fired it up and took it for a spin around the grounds. I get home and the wife askes if I was driving the car as she heard a "racecar" zooming around. Now I didn't get on it hard at all as it's wet here now and I was about 1/2 mile away...so I figure since the thing won't quiet down I might as well make as much racket as possible.
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Old 09-13-2006, 07:42 AM
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Open lakers or 1 3/4" straight (shotgun) pipes sound awesome on a flathead, they are killer loud when you get into it and crackle when you back off, but are just right cruising gently. "nostalgia noise" rarely will get you a ticket, just don't get carried away.
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Old 09-13-2006, 10:07 PM
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Got a 4 inch straight pipe on my Dodge Diesel. Sounds great. Should hear what it does at the Mall of America day after Thanksgiving. I must have set off a dozen car alarms in a row.. Nice chorus. BMW, Mercedes, Audies (sopranos)
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Old 09-14-2006, 07:53 AM
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Quote:
Originally Posted by bentwings
Got a 4 inch straight pipe on my Dodge Diesel. Sounds great. Should hear what it does at the Mall of America day after Thanksgiving. I must have set off a dozen car alarms in a row.. Nice chorus. BMW, Mercedes, Audies (sopranos)
Forgot all about mentioning that. My Dodge is a 97 and both the converter and muffler has been removed but I stayed with the stock 3" pipe. The turbo helps to quiet it down just enough....sounds like a big rig lol.
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Old 09-18-2006, 10:53 AM
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Quote:
Originally Posted by bentwings
Got a 4 inch straight pipe on my Dodge Diesel. Sounds great. Should hear what it does at the Mall of America day after Thanksgiving. I must have set off a dozen car alarms in a row.. Nice chorus. BMW, Mercedes, Audies (sopranos)
that's why I love diesels! music to my ears... anyway- there were these stupid guys at cruise night a couple years ago who would watch the others do burnouts as they leave, well this stupid group of 5 or 6 basically stood on the shoulder. Soon enough a dodge diesel comes up and blasts them in a cloud of smoke... hahaha!

serves em right... sadly the cops have busted down on the little ice cream joint in the middle of nowhere, and I have heard from other cruise-nighters the cops wanted the whole thing shut down. I haven't gone back since.
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Old 09-18-2006, 10:55 AM
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repeat post sorry
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