so what's what for power gains ?
I wouldn't change my stock exhaust just for sound but are any of the exhaust mods really worth the money spent for the power picked up ?
If there'a any cheap mods that actually gain anything I'd be willing to accept a little more exhaust noise, but I wouldn't spend $800 for 5-10hp for any or especially a lot of added sound.
thoughts ?
any good videos of what you guys have done. I'd like a tad extra sound over stock but nothing that pops, or rumbles to much.
The answer may be in the "Power - per - mod" discussion here:
http://www.ecoboostperformanceforum.com/index.php?topic=808.15 (http://www.ecoboostperformanceforum.com/index.php?topic=808.15)
exhaust mods = noise fluff. Very little else unless you add downpipes.
that's kinda what I thoguht that power by mods thread syas you can gain 20hp from down pipes and 20hp by replaceing the rest of the OEM exhaust system ?? 40hp total would be significant and possibly worth it but not likely ?!???!
has anyone put flowmasters on a SHO ? Iwonder if it would sound like a V6 Mustang with flowmaster mufflers ???
I would say the downpipes are a must and a pretty good bang for the buck. I am going to have a custom solution made up for my exhaust after the 2.5" downpipes with a short section of 2.5" straight pipe with electronically operated exhaust cutouts. Exhaust cutouts are known to pick up nice HP gains on F/I builds, plus you get the benefit of having a two mode exhaust. Actually it is more than two mode with the exhaust cutouts being adjustable with a switch, so you can adjust the sound to your liking. I have been quoted $600 for exhaust cutouts, straight pipe and labor. Tough to beat that setup for price and performance.
I just did the 3rd cat delete. After the (2) O2 housings (first cats) coming off the turbos' the exhaust runs down into 2 flex pipes. From there the two pipes go into a shared 3rd cat. After removing and inspecting this cat I'm pretty sure removing this does help flow. It's full of the substrate/screens etc. which make up a cat converter. I had this removed and replaced with straight pipes for 60 bucks. I would say this would be the most cost effective exhaust mod. Overall noise increase maybe 5-8% over stock. Car spools a little quicker and feels stronger in upper rpm range with less fall off. FYI
Quote from: 68_GT on November 19, 2013, 09:33:27 AM
that's kinda what I thoguht that power by mods thread syas you can gain 20hp from down pipes and 20hp by replaceing the rest of the OEM exhaust system ?? 40hp total would be significant and possibly worth it but not likely ?!???!
has anyone put flowmasters on a SHO ? Iwonder if it would sound like a V6 Mustang with flowmaster mufflers ???
Within a couple months of getting my 2010 EB Flex, I replaced the rear mufflers with Magnaflows. Definitely sounds like a V-6 Mustang. Just the rught amount of noise fluff!
Since then I have PPE downpipes with cats and a NESHO mid-pipe that adds an "X" pipe and deleted the 3rd cat and mid-muffler.
It is definitely louder and feels like more torque output, but worth maybe .1 and .2 in the quarter mile at most.
I Dyno bone stock running 93oct @ 297hp. With LMS stage4+($599) and DynoMAX mufflers ($225 Autoanthing) (2.25" same as stock) just more sound. @ 345hp. With LMS METH ($1050), LMS Down-pipe ($830 Cats), Magflow X_Pipe ($60 Autoanything), Local exhaust shop X-pipe back 2.5" pipes with the DynoMax(up-size to 2.5")($500) DYNO @ 405hp. ALSO I HAVE MY STOCK MUFFLER MOD TO GO ON MY 2.5 PIPES FOR ROAD TRIP WITH THE WIFE.
DYNOMAX MUFFLERS
https://www.youtube.com/watch?v=LklqfjhwZtI (https://www.youtube.com/watch?v=LklqfjhwZtI)
LMS DYNO RUN
https://www.youtube.com/watch?v=hCIWVhlcYQk (https://www.youtube.com/watch?v=hCIWVhlcYQk)
SOUND CHECK AFTER UP-GRADES
https://www.youtube.com/watch?v=eQu5Fnpx7zs (https://www.youtube.com/watch?v=eQu5Fnpx7zs)
Are the Dynomax mufflers 2.5" connections?
Quote from: SRT82ECOBOOST on November 19, 2013, 08:35:02 PM
Are the Dynomax mufflers 2.5" connections?
The DynoMax are 2.5" at the base with a step-down to 2.25" to fit the stock exhaust behind the axle. My local shop cut the step off and weld them right to the new 2.5" pipes.
(http://www.ecoboostperformanceforum.com/gallery/55_02_08_13_6_53_35.jpeg)
NESHO? Are they still around? I am looking for a setup but it seems that their site has been down for quite some time.
Here is a list of tested mods originally posted by 4DRHTRD in the "power per mod" thread and he updated it in October 2013 it discusses exhaust mods and ranks the mods by bang for the buck. the link and a copy of the post are below:
http://www.ecoboostperformanceforum.com/index.php?topic=808.30 (http://www.ecoboostperformanceforum.com/index.php?topic=808.30)
4DR's post is below:
Thought this might be a good topic for new owners to review:
I'm going to rank these by my opinion of best mod by power per dollar spent.
1. Tuning - you can pick up 30-70HP here pretty easily depending on what fuel is available to you and if you want to run race gas or not. Figure around $500 with tuner. The lower octane you can run the lower HP you an pick up thus the range. If you really want to maximize your power with tuning doing a dyno tuning session with your tuner will pick up another 10 to 30HP (IMHO) but will cost you a few hundred dollars more. If you're looking for ever HP safely this is the best case scenario.
2. Meth injection - you can pick up another 30-60 HP here depending on how aggressive you want to get with timing and your tuner. Cost between $200 and $1000 depending on how fancy you want to get with controllers, extra bottles for storage etc.
3. Turbo upgrade - If you have a tune and meth injection (my suggestion) or an aux fueling solution (discussed later) you can upgrade your turbos. Worth another 30-? (most HP now is 600WHP with aux fueling)HP. Currently the upgrades upgrade either your compressor wheel and/or add an aftermarket wastegate. There is also a full turbo upgrade coming this fall or winter so no one knows the true maximum output of the turbo upgrade scenario yet and how much power the block will take. Currently $1500 to $2000 for the two stock turbo upgrades, and $2200 for a true turbo center section upgrade.
4. Downpipes - luckily multiple companies offer these now and they're getting cheaper, between $700ish and $1000 for around 20ish HP and quicker spooling of the turbos.
5. Exhaust - $100ish (remove 3rd cat, resonator and mufflers with straight pipe) to $1000+ for full stainless catback exhausts. Another 20ish HP here.
6. Intake - jury is out on this one, we've seen these drop ET/MPH from doing intakes but hopefully we'll be coming out with a new intake tube per turbo with a cold air or sealed stock style box soon. $200ish to $700
Optionals not normally used (my crazy mad scientist mods)
Nitrous - I've personally ran a 75 shot on my Flex and picked up .6 in the 1/4 mile. You can pick up a used kit and controller on Craigslist pretty cheaply and install. For all brand new gear it can get expensive. $250 (used parts) to $$$$$ for new.
Auxiliary fuel system - I'm the only one who's built one so far, to replicate with what I know now around $2800. Gives the ability for unlimited fuel without the HPFP sagging under load. Needed in the long term for the true turbo upgrade or if you want to run E85. This includes injectors, dual in tank fuel pumps and a modified intake manifold or intake spacer (working on this one)
E85 or E85 mix - Auxiliary fuel system required for this one as the stock system can't handle ANY E85 mix without running out of fuel. E85 let's you increase the timing massively and run "hotter" boost while cooling the intake track off as well. An alternative to running alky/water injection but a true fuel. Requires dual in tank fuel pumps to replace factory pump. This fuel has allowed me to get to 600WHP on just a turbo upgrade and downpipes/cutout.
Exhaust Manifolds - Now that I've hit 600WHP, the small size of the factory exhaust manifolds is starting to get in the way, need to find a way to replace stockers, this might open up a way to also install a T3 turbo swap.
Water to Air Intercooler - 600WHP has caused me to start looking hard at the factory intercooler and replacing it. An aftermarket water to air will be the best scenario as there's just no good way to fit a big air to air in the front of the car. I'm guessing at the current 26PSI I'm at that I can pick up 30-50WHP here.
Dual-in-tank fuel pumps - Auxiliary fuel system required for this one as the stock system can't handle ANY E85 mix without running out of fuel. E85 let's you increase the timing massively and run "hotter" boost while cooling the intake track off as well. An alternative to running alky/water injection but a true fuel.
I still don't think you will get 20 HP from just a Cat Back but you may. IDK I am hoping to do down pipes along with a third cat and resonator delete then out through the stock exhaust.