Cpt.Fred Posted January 26, 2011 Report Posted January 26, 2011 while constructing the headers for the P10 i came across the question where to "change sides" under the car would work best when it comes to the exhaust pipes later on. at some point halfway i want the 2 pipes run parallel on opposite sides of the car, over the rear axle and straight out under the rear bumper. so one of the pipes has to cross the drivetrain somewhere. the mufflers will have to be left and right of the crossmember, where the driveshaft runs through it. i want to be as close to the body as possible, since the car will be quite low, best would be to run through the holes in the frame, maybe. can anyone here supply me with an undercarriage photo of his P10 dual exhaust? just to get a comparison... or any other car with a similar frame? that would be great! thanks, fred Quote
Cpt.Fred Posted January 26, 2011 Author Report Posted January 26, 2011 (edited) no, just a nice picture, since your frame is completely different from mine;) the 1940 frame is like this, but with a V8 you don't have to cross the driveshaft... Edited January 26, 2011 by Cpt.Fred Quote
Cpt.Fred Posted January 27, 2011 Author Report Posted January 27, 2011 nobody? well, I'll figure it out... thanks anyway! Quote
greg g Posted January 27, 2011 Report Posted January 27, 2011 You could do similar to what Pete did on his 50, and have both pipes run down the pass side exiting with dual outlets. Quote
40plyrod Posted January 28, 2011 Report Posted January 28, 2011 I have thought about this on my car too, since I'm planning to keep the six. I haven't looked into it too closely but is there room to cross up front under the oil pan before the transmission? Quote
BobT-47P15 Posted January 28, 2011 Report Posted January 28, 2011 Some have had flanges placed on the ends of the crossover pipe so it can be removed to allow access to the transmission or the bellhousing. Quote
Cpt.Fred Posted January 28, 2011 Author Report Posted January 28, 2011 greg, i looked at my reference folder and found a picture of of pete's exhaust, but i like them better exiting on both sides of the car... 40plyrod, i guess there won't be room since my oil pan has the bulk on the rear. i have to do it like don somehow, but i don't know exactly how. some measuring next week... bob, that's a good idea! keeping stuff maintainable is a very important part of good modifications... same problem is with headers and valve adjustment. Quote
james curl Posted January 28, 2011 Report Posted January 28, 2011 I believe you could run them side by side back to in front of the gas tank then cross over to the drivers side with one pipe. Your X member should end before that point on your frame. All of us with P-15s and newer do not have a X member to stiffen our frames as ours are boxed and open between cross members. Quote
Plymouthy Adams Posted January 28, 2011 Report Posted January 28, 2011 please to keep in mind the fill tube for the gas tank when routing a pipe on the drivers side..usually the tank is almost onto the inside of the frame as it is...I in correcting this for true duals on my two cars, moved the gas tank over 4.5 inches and protected the tank and the fuel tank fill tube with a heat shield...if you are going to cross over..one may choose to do it at the very rear behind the tank and afore the bumper...HOWEVER..even at this I recommend a heat shield here also as the trunk will be subjected to lots and lots of condensation..you need only look to cars like Porsche, all little British car and Fiats plus who know how many others to see the effects condensation has on the inner panels.... other areas to consider on the dual running down the drivers side, brake flex line, shocks and if you happen to have a factory Panhard rod..plumbing the pipe on this side can be a challenge..the Panhard is the larger chassis option, not sure if Plymouth ever got one..but nonetheless an issue if you have one.. Quote
Cpt.Fred Posted January 28, 2011 Author Report Posted January 28, 2011 thanks, tim. the tank will most likely be raised into the trunk a bit in order to protect it from hitting the ground, this is going to be quite low in the end. the heat shield is a good idea and i will look for a good solution here. i do not have a panhard rod, nor a rear sway bar. shocks are an issue, but i will find a way. the setup on the 39 chrysler i posted earlier is quite nice, i think, somewhere i have photo of the rear end... Quote
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