Single 3" exhaust enough for my combo? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 7 Old 04-16-2009, 11:27 AM Thread Starter
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Single 3" exhaust enough for my combo?

Looking to switch from the current dual 3" setup on my car to a simple single 3" with Dynomax Ultra Flo oval muffler.

Is this going to be enough?

306
185cc TW heads
e cam
67mm turbo

Car made 437rwhp 500tq runs mid 10's


Downpipe is 3" but I could open it up to 3.5" after the DP if that's necessary - need to know before I buy the stuff.


1986 Mustang GT
306 E303, TEA 185 TW, Quicktime Turbo 67mm, Redneck C4 15lbs boost
525hp/626tq
*Sold drivetrain - Rolling Chassis may be available*
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post #2 of 7 Old 04-16-2009, 11:46 AM
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My vote is for a 3.5" downpipe that way you can always upgrade later, Aaron. A single 3 can hold a lot of power but how much more will you want out of this? I thought you were running a stock block. If so I might say single 3" without a muffler. Is your car that loud? I don't remember if it is. I just remember it getting down the track well. Good luck man.
-Troy

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post #3 of 7 Old 04-16-2009, 11:55 AM
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You should be fine. Dual 2.5" exhaust will actually flow more than a single 3". Here are two useful threads from the turboforums.

http://www.theturboforums.com/smf/in...?topic=59249.0

http://www.theturboforums.com/smf/in...?topic=45713.0

Luke M.
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post #4 of 7 Old 04-16-2009, 05:38 PM Thread Starter
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Thanks Troy

The downpipe is 3" and I can't swap it out but I was thinking that I could get a reducer from 3.5" to 3" and install it at the bottom of the downpipe and then run a single 3.5" pipe n muffler.

Montelius - thanks for the info.


I think i'm going to run with the single 3" as it should support the power level that i'm looking at running this year.

1986 Mustang GT
306 E303, TEA 185 TW, Quicktime Turbo 67mm, Redneck C4 15lbs boost
525hp/626tq
*Sold drivetrain - Rolling Chassis may be available*
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post #5 of 7 Old 04-16-2009, 07:39 PM
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Quote:
Originally Posted by ratedz View Post
Thanks Troy

The downpipe is 3" and I can't swap it out but I was thinking that I could get a reducer from 3.5" to 3" and install it at the bottom of the downpipe and then run a single 3.5" pipe n muffler.

Montelius - thanks for the info.


I think i'm going to run with the single 3" as it should support the power level that i'm looking at running this year.
This is what I did. I have a 3" DP. From the DP it goes to 3.5" through a Borla XR1 muffler and dumped at the axle.

1990 Mustang GT
Dart IE 363, PT78 HPS, Built 4R70W, BS3, BBRC Fuel system, TeamZ, ect.....
Tuned by Bob Kurgan
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post #6 of 7 Old 04-18-2009, 12:38 AM Thread Starter
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Got most of the parts today - 45 elbow, 4ft of 3" tubing, cutout, v-band clamp

The only thing I balked on was the muffler. I haven't picked one up yet but i'm now leaning toward a Hooker MaxFlow.

Driving around with the open DP got old in the 5 minute trip out to Summit today.

1986 Mustang GT
306 E303, TEA 185 TW, Quicktime Turbo 67mm, Redneck C4 15lbs boost
525hp/626tq
*Sold drivetrain - Rolling Chassis may be available*
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post #7 of 7 Old 04-18-2009, 09:08 AM
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the borla xr-1 does sound pretty good, but i would maybe look into something a little less "shaking the house" muffler lol

Precision 67mm turbo, this and that.
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