do-it-yourself exhaust system

nielsmobers · 05-05-2003, 08:11 AM

Does it matter which kind of exhaust system is used? I can imagine that some extra hp's can be the result of a good exhaust system, but, if you have an exhaust without a muffler, can this damage your engine. I'm planning to make my own exhaust system with two cherry bomb mufflers. I will use the original exhaust manifold but I'll make the tubes myself. Can this be dangerous for the engine ('72 302 V8)?

Lou Lyman · 05-05-2003, 03:53 PM

Should not hurt anything but your ears.

Jeff65 · 05-09-2003, 12:59 PM

With open tubes the engine gets damaged from cold inrush of air following wide open throttle then shutdown of engine. Cold inrushing air can warp valves. With mufflers, the inrushing air is heated sufficiently to prevent any chance of damage. With cherry bombs there is little chance of a problem if exhaust piping reaches the rear axle. Chances increase as the plumbing gets shorter and shorter. I would start to worry if the total plumbing length is less than 36".

hobgoblin351 · 05-13-2003, 09:45 PM

Jeez ya learn something new everyday! Good point Jeff.

05-05-2003, 08:11 AM	#1
nielsmobers Registered Member Join Date: Jul 2002 Location: Holland Posts: 28	do-it-yourself exhaust system Does it matter which kind of exhaust system is used? I can imagine that some extra hp's can be the result of a good exhaust system, but, if you have an exhaust without a muffler, can this damage your engine. I'm planning to make my own exhaust system with two cherry bomb mufflers. I will use the original exhaust manifold but I'll make the tubes myself. Can this be dangerous for the engine ('72 302 V8)?

05-05-2003, 03:53 PM	#2
Lou Lyman Registered Member Join Date: Dec 1998 Location: Tampa, FL Posts: 70	Should not hurt anything but your ears. __________________ Enjoy what you do. Do what you enjoy.

05-13-2003, 09:45 PM	#4
hobgoblin351 Registered Member Join Date: Sep 2002 Location: NYC Posts: 245	Jeez ya learn something new everyday! Good point Jeff. __________________ 1970 Stang Conv: en:Boss351 (balanced/blueprinted) mech cam(240*@.050/.540 lift) Scrw in studs/comp cams rllr rkr Mldn valves 2.19in 1.71ex ported polished cc'd hrdnd ex Keith Black FT pistons(10.25/1) Weiand Excellorator manifold Holley700 DP mech 2nds MSD 6 box and Dis Headers/2 1/2 inch duels tr: modified FMX re:9-inch/3.89 limited slip

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Exhaust system	RiceHater	Modular Madness	17	04-20-2003 04:44 PM
Speed Secret # 4	jim_howard_pdx	Windsor Power	13	11-10-2002 03:42 PM
Header gaskets	Stang951	Windsor Power	18	11-01-2002 05:57 PM
MAC exhaust system	Tony Frank	Blue Oval Lounge	3	01-25-2002 09:05 AM
Best Exhaust system for '91 GT 5.0?	Cenla 5.0	Windsor Power	17	06-07-2001 06:51 PM

05-09-2003, 12:59 PM	#3
Jeff65 Registered Member Join Date: Jul 2002 Location: Oklahoma City Posts: 208	With open tubes the engine gets damaged from cold inrush of air following wide open throttle then shutdown of engine. Cold inrushing air can warp valves. With mufflers, the inrushing air is heated sufficiently to prevent any chance of damage. With cherry bombs there is little chance of a problem if exhaust piping reaches the rear axle. Chances increase as the plumbing gets shorter and shorter. I would start to worry if the total plumbing length is less than 36".