Improve flow w/o increasing noise... - TCCoA Forums
 
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post #1 of 7 (permalink) Old 04-02-2009, 01:29 PM Thread Starter
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Improve flow w/o increasing noise...

Ok, forgive the n00b thread on this but I'm kinda sensitive about noise.

The last car I had was all flowmaster'd out and the noise was really annoying-- but the REAL problem was all the unnecessary attention it drew to the car.

I want to improve flow but I'm not sure how much is there to be gleaned off of a stock 4.6L NPI engine or if it's even a restriction.

What would be the best option for keeping noise down while improving flow? The closer to stock Db levels the better...

Should I just have the piping replaced with bigger diameter pipes and leave the stock things in place? Should I remove the resonator chamber thing in the middle?

Your input is really helpful.

I've been ticket free for several years and I'd like to keep it that way, and having quiet mufflers helps me skirt around under the public eye... With this particular car I try very hard to keep up a stock appearance externally.

Best,
Ghost

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post #2 of 7 (permalink) Old 04-02-2009, 05:21 PM
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You may try putting an X pipe or a magnaflow in place of the resonator, and then run true duals out the back to the stock mufflers (if you still have em) because stock is really pretty quiet. But you would still get good flow with the X and true duals ans quietness with stock muffs. just a thought.

C.Hill

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post #3 of 7 (permalink) Old 04-02-2009, 06:33 PM
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I had a cat back I had done that was easily as quiet as stock.
Dual in and out 2.5" Magnaflow muffler replacing the third cat setup. Into an X pipe.
Then Dynomax superturbos at the back with Magnaflow 2 1/4" resonator tips.

Its breathed easier for sure but was like stock sounding.
All totalled it cost $600 to do.

Don't use the stock mufflers, they are so restrictive its crazy.

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post #4 of 7 (permalink) Old 04-02-2009, 06:41 PM
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post #5 of 7 (permalink) Old 04-02-2009, 08:24 PM
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Mine is pretty much stock and for duals, i went with stock cats up front, 2 1/4" pipes, took out third cat and resonator into stock mufflers at rear. Not bad and i'm sure that removes more than enough restriction on a fairly stock 4.6 and still is fairly peaceful.

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post #6 of 7 (permalink) Old 04-02-2009, 09:01 PM Thread Starter
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Quote:
Originally Posted by stangboy7 View Post
You may try putting an X pipe or a magnaflow in place of the resonator, and then run true duals out the back to the stock mufflers (if you still have em) because stock is really pretty quiet. But you would still get good flow with the X and true duals ans quietness with stock muffs. just a thought.

C.Hill
x pipe it is with duals.

Best,
Ghost

96 Laser Red 4.6L - Custom
Custom Nascar-Inspired Bodykit - 55* Rear Spoiler - J-modded Trans - 80mm MAF - One-Off Diablosport Chipmaster Revolution Chip/Tune W/Toggle - ScanGaugeII Diagnostics & Data Readout - PBR Brakes - Drilled/Slotted Rotors - SC Wheels & Springs - Falken Tires - KYB GR-1 Shocks/Struts - FSTB - RSTB - RTLB - LECB - 60/40 Split Rear - SC Seats - SC Vac/Boost Gauge
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post #7 of 7 (permalink) Old 04-05-2009, 08:51 PM
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I was running true duals with a magnaflow mid mount muffler and dynamax mufflers out back last time I visited u nick. I have since ditched the rear mufflers to increase sound. If you liked how they sounded we could arrange a deal.

-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
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