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Side Exhaust + Shorty Headers Project

49K views 165 replies 29 participants last post by  viking757 
#1 · (Edited)
Hey guys, I put a lot of this same info in the dyno thread but i figure more people would benefit from the headers information if i started a new thread.

For those that don't know i picked up some brand new Edlebrock 65993 shorty headers for a Charger/300C off of craigslist for $180. They list for $450-$550 so i figure if this doesnt work out i can always sell them to a Charger guy. Last night i pulled off the SRT8 exhaust i had and eventually got the drivers side exhaust manifold off which in itself was quite a task. I lined up the manifold gasket and no surprise it all lined up. I tried squeezing it into position but am hung up by about 1/4" of clear by the starter motor bracket. I was worn out after 5 hours of working on it, so i'll hit it again tonight and keep you guys updated. I know long tubes are better but for the $$ i think this may be the way to go for many fellow 5.7L WK'ers.

I purchased a set of pypes high flow cats and M-80 mufflers. The plan is to keep everything as even as possible. I intend to keep the passenger side cat pretty much in the stock spot, and then do the drivers side near the front drive shaft. I was worried about the fuel lines and harnesses, but apparently its not that big of a deal as i have seen photos of an SRT with a long tube setup with the collector pipes run in this exact same spot. Just to be safe though, i got some heat shielding from Jegs. From there i will have an S shaped pipe bend outwards just in front of the mid crossmember and to the M-80 mufflers. For now i plan to just do turn downs until the metal shop finishes my side skirts.

















 
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#86 · (Edited)
I'll probably take them to the muffler shop this weekend and get them cut and installed. On a much more exciting note, i just got a call from Will at Racing Solutions! The AWD dyno has been reserved for tomorrow from 8-10am for my dyno tune! I got all the exhaust parts installed just in time :) I'm going to have him turn off my secondary O2 sensors and the EGR function and hopefully pick up some real hp since it's been running on the stock tune since the engine was built. Heck im going to clean my K&N and maybe install some new plugs tonight just in case.

I get almost all my parts delivered to work. It's the only way to confirm they will be signed for. Nothing worse that waiting a week or so for parts to arrive only to come home from work to find they are locked in the leasing office or ups kept it and will attempt delivery again the next day.
 
#87 ·
Mmmm I like it. I think it'll look sick dude. Don't forget the camera when you go to the dyno.. i want videos of that thing pulling! lol
 
#88 ·
#89 · (Edited)
The long backside of the tip is hitting the pinch weld as i havent cut/bent it yet. I expected to have to cut off the backside of the tip, its just too long. So i took some pics for the moment. I think once the flange is sitting flush and it has that slight downward angle i will like it more. Man these tips make my wheels look really boring. That might have to be the next mod

Also i read up on boat exhaust. Evidently many boats have a wet exhaust sytem where some of the water used to cool the motor is released into the exhaust cooling it from 1700 degrees to like 200-225. The marine exhaust tubes i found said they were safe up to 250-275 degrees. Do you think the tips get that hot this far back from the engine? I need to find someone with one of those infrared thermometers to do a quick check.







 
#90 ·
Well i realized we have one of those temp guns here at work so i just tried it. After 5 mins of around town driving the current tip was 160 degrees. After about 20 mins with a few WOT sprints it was only 180 so i think the chances of it hitting over 250degrees are pretty slim. The cats were about 330degrees :D
 
#91 ·
That looks freaking awesome. BTW good idea with the bedliner to the side skirts to "paint" the panels you put in.
 
#93 ·
All of the tubing is aluminized. The mufflers and cats are SS
 
#94 ·
Dyno/exhaust video will be coming this evening! I takes a while to convert them upload the vids and i cant do it from work
 
#96 ·
Cant wait! Get the exhaust completed as well?
 
#98 ·
#100 ·
That sounds awesome! What gear were they doing the pulls in?
 
#101 ·
The best i believe was 311hp and i dont recall the tq but it was higher than the hp by quite a bit. They were supposed to email me the graphs but i havent gotten them yet. I was really hoping for higher #'s, but it's more than stock so im happy. Supposedly mustang dynos read lower than dynojets? I guess it doesnt matter im just glad they smoothed out the curves. It pulls much more consistently now through all rpms. Before it'd pull hard, lighten up, then pull again.
 
#102 · (Edited)
Please post a vid without the dyno noise so I can crank it on the stereo...
Sweet sound
 
#103 ·
I'll try to get a new video soon. I just got the dyno sheets this morning. It's not as high as i had hoped but it's a pretty flat curve so it's nice maintaining the pull throughout the rpm range

 
#104 ·
Not bad numbers, but get that AF down to 12.8 at WOT!!! You're running too lean.
 
#106 ·
I went to the muffler shop this afternoon and had him trim down the tips enough for me to get them in. I plan to go back tomorrow to have him hook them up and weld them in. Here's one installed



 
#108 ·
looks tight and clean dude
 
#109 ·
Thanks guys. I was a little unsure about it once i bolted it on but appreciate the comments.
 
#110 ·
got some close ups though? I'd like to see how it looks up close and how the pipe is ran if you could :)
 
#111 ·
Well the pipes havent been connected to the tips yet. Actually i only have the one tip bolted on at the moment. Too busy packing up and getting ready to move. Right now my main concern is even though where the tip connects to the side skirt is sheet metal, will there be too much heat transferred to the plastic parts of the side skirt. I drove it around for a while and checked the temp of the current turndowns, it was about 180degrees after 15 mins of driving. I'd imagine by the time it reaches the tips, sheet metal, then the plastic it'd be about 130-150degrees which i dont think would be be enough to melt anything. Hell i checked my dash for the fun of it and after sitting in the sun all day it was 136degrees! I just dont want to find out the hard way on a 1200 mile move pulling a trailer, so i may wait until after the move to get it finished up. Until then here's how the pipes are run, i think this was also on page 4 of this thread

 
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