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Small tube pipes vs big

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Author	Topic: Small tube pipes vs big
Gary Gearhead Posts: 656 From: Sarasota, Fla. USA Registered: Jun 99	posted 08-29-2001 11:05 AM I have been wondering what other effects it would have on a engine using smaller vs big exhaust pipes besides a HP drop? I would think HP would decrease and torque would increase abit. Put it this way, I found a exhaust combo (sidepipes)that have 2-1/4" inlets to large tube mufflers and wondered what if any effect I would have going with this smaller pipe over using 3" pipe. Overheating problems possible or would I be ok using them? IP: Logged
TomP Moderator Posts: 3540 From: Delta BC Canada Registered: Dec 99	posted 08-29-2001 12:34 PM it wouldn't make overheating a problem unless the pipes were tiny. 2 1/4" is fine for any small block and most big blocks. 3" is overkill but won't hurt power. IP: Logged
bluestreek Gearhead Posts: 545 From: Athens,GA Registered: Jul 2001	posted 08-29-2001 12:38 PM It depends on your engine and how restrictive the mufflers are.. I would think that a short 'non-restrictive' 2 1/4" system would work great on a SB engine that is only gonna turn 6200 rpms or so .. It will definitly give more low end torque than a 3"... For more rpms and CU.IN., then you should go bigger... 2 1/2 - 3". Exhaust overheating is usually due to a lean condition or not enough compression to keep exhaust gases moving.. IP: Logged

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