c-4 exhaust system



c-4 exhaust system

Postby grumpyvette » February 5th, 2009, 10:01 am

I see guys get some rather absurd quotes at times (well over $3K) for a full exhaust and headers on their corvettes, and if your willing to just buy the parts and install them yourself theres some decent components available

http://www.vetteweb.com/tech/vemp_0908_ ... index.html

read thru these links also
viewtopic.php?f=56&t=1303

viewtopic.php?f=56&t=1247

these guys at MELROSE can supply you with a very nice headers and exhaust you can install in your driveway for less than $1600-$2K complete in most applications, theres less expensive systems but few as well laid out, now obviously if your willing to do some fabrication and not just buy a ready to install system theres a ton of less expensive options, but remember quality headers are expensive and having a well thought thru system thats low restriction is mandatory to make good peak horsepower.
If your swapping to a larger 3" exhaust with an (X) pipe, it has or will more than likely reduced your engines exhaust restriction this tends to lean out the fuel/air ratio, which can reduce torque ESPECIALLY if you still have shorty stock exhaust manifolds that don,t always scavenge the cylinders correctly at all rpm levels, you can generally get back the torque and add upper and mid rpm power with correctly designed long tube headers, but most engines with factory injectors and tuning run rather lean for passing emission testing. and most original cams are more concerned with mileage and drive-ability than torque and peak power.
every change you make effects the way the car runs, if you reduce the exhaust restriction it potentially allows the car to make noticeably more hp, but REQUIRES the engines re-tuned to match the new conditions and having a longer duration cam and larger injectors and long tube headers certainly helps take advantage of the lower exhaust flow restriction.
IF YOUR WELDING STAINLESS USE A MINIMUM 16GA 18 GA is too THIN, FOR STAINLESS HEADERS OR EXHAUST PIPE, AND DON,T FORGET TO PURGE THE BACK GAS WHEN WELDING , and 321 is superior to 304 stainless


http://www.melroseheaders.com/products/smooth_flow_exhaust_systems/c-4.php

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http://www.melroseheaders.com/products/ ... ms/c-4.php



http://www.mamotorworks.com/corvette-c4 ... 9-960.html
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heres is one of the best commercially available exhaust systems Ive seen, but I usually suggest adding an additional (H) pipe just in front of the muffler entrance point vaguely similar to this, but without the (Y) in the exhaust system, any decent muffler shop or welding shop can easily modify the system like that during the install process

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to both mellow the tone and further reduce harmonics
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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Re: c-4 exhaust system

Postby grumpyvette » April 12th, 2009, 5:19 pm

but having replaced dozens of 1984-87 exhaust systems on c4 corvettes I can assure you that if you have the option to run without the cats , and your serious about horsepower potential, that having a decent 3" full length exhaust with an (X) pipe is far superior and far less restrictive to ANYTHING those standard 2.5" cat equipped dual (Y) design exhaust systems can provide for power potential, matched to decent headers.

now I built my own custom system but this melrose system looks like an excellent option if your not into fabricating on of your own.

http://www.melroseheaders.com/products/smooth_flow_exhaust_systems/c-4.php



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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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Re: c-4 exhaust system

Postby grumpyvette » February 18th, 2012, 4:55 pm

is the pypes exhaust system on the vette a 3" full length and is it STAINLESS STEEL or aluminized iron?
do you have any pictures of the whole headers back exhaust laid out, before being installed?


LD85 posted this



http://www.summitracing.com/parts/PYE-SCC40R/

it is 2.5" true dual mandrel bent with an X-pipe, 409 SS

With No cats, it is $441 + shipping at Jegs.

Hi Flow cats PArt number CVM11k =$269
These 200 Cell 2.5" OD slotted inlet w/O2 bung and 2.5" OD outlet Metallic Mini converters are polished 409 stainless, but weigh only 3 lbs and measure only 11" long. Installed, they only take up 7" in length. Rated at 4,500 lbs capacity. Pypes cats and catted X-pipes will pass most states emissions testing procedures. However, check your local and state ordinances for installation and usage regulations. Kit comes with 2 metallic catalytic converters, 2 band clamps and 2 O2 sensor bung plugs. Flows 330 CFM.
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

User avatar
Site Admin
Site Admin
 
Posts: 14105
Joined: September 14th, 2008, 1:40 pm
Location: florida


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