red64chevelle Posted September 15, 2003 Report Share Posted September 15, 2003 I was looking at it, and I am not sure about the single flowmaster. I just am not sure if I'll be able to user the stock tip. I am really starting to think that dual 3" flowmasters, with an H-pipe is the way to go. Link to comment Share on other sites More sharing options...
blackhawk Posted September 16, 2003 Report Share Posted September 16, 2003 rico750sxi: Well I hooked up the shop-vac and let it blow through the stock exhaust through both inlet’s and It appears to be a dual exhaust muffler. I still have the Y-pipe on the exit end and air blows through no matter which inlet pipe the air blows through. So since I don’t know what the internals look like on the muffler I would say it doesn’t have a dummy exit on one of the pipes. Link to comment Share on other sites More sharing options...
rico750sxi Posted September 16, 2003 Author Report Share Posted September 16, 2003 Thanks Blackhawk. Link to comment Share on other sites More sharing options...
blackhawk Posted September 16, 2003 Report Share Posted September 16, 2003 ... Link to comment Share on other sites More sharing options...
rico750sxi Posted September 16, 2003 Author Report Share Posted September 16, 2003 Hey Blackhawk, I was just thinking, if the muffler only had one real exhaust outlet and the other was a dummy then the air would blow out no matter which inlet you put it in, right? Thank you for doing your test, I appreciate it. Anyone hacked off their tailpipes yet? I'm still curious if anyone has seen the exit side of their stock muffler. Link to comment Share on other sites More sharing options...
blackhawk Posted September 16, 2003 Report Share Posted September 16, 2003 Yeah I know what you are saying, that’s why I said I have no idea what the internals look like, but the exhaust does blow through both inlet holes. Someone may be able to look up a diagram of what the internal working look like for ya… Link to comment Share on other sites More sharing options...
rico750sxi Posted September 16, 2003 Author Report Share Posted September 16, 2003 Thanks again Blackhawk. Link to comment Share on other sites More sharing options...
red64chevelle Posted September 16, 2003 Report Share Posted September 16, 2003 Anyone have the part number for the best fitting Flowmasters to use for a true dual setup? What I want to do is use two flowmasters to make it a true dual setup. And then add an H-pipe after the cats, but before the mufflers. I am thinking of just using 2 chambers of the Delta series. Link to comment Share on other sites More sharing options...
SuperDave Posted September 18, 2003 Report Share Posted September 18, 2003 If you reduced the backpressure by running an aftermarket muffler(s) or even straight pipes, it moves the power peak higher in the rpm band, but sacrifices the low-end torque. No longer do you get the exhaust gas pressurizing the intake charge, but low backpressure exhaust systems do allow the engine to efficiently expell gases at high rpm. Sorry dude, doesn't work that way. Any improvements in exhaust scavenging increase volumetric efficiency. Torque peak numbers may be raised or lowered in the rpm scale by increasing the collector volume and length, but the back pressure is generally a bad thing. The circumstance you just described is known as "Reversion" That is when the residual gasses in the exhaust are reintroduced into the combustion chamber by a low pressure situation such as when camshaft overlap occurs. If the exhaust "supercharged" into the combustion chamber as you described it would contaminate the fresh intake charge (air/gas mixture) and reduce power output potential. An engine is nothing but an air pump. The more air you get in the more you need to get out to make power. Improvements in exhaust flow have always been the first place to look for more power. Remember, torque is what moves you off the line, horsepower is what maintains your speed such as when ascending a long grade. Torque and horsepower come hand in hand. Emphasizing torque is done by altering rod length to stroke ratios, camshaft profiles, gearing etc... So reduce your backpressure, allow a fuller denser air/fuel intake charge to invade your combustion chamber and watch your power and torque both increse proportionally These are great trucks, keyword "Trucks" not drag trucks, just a nice street truck! If it's max acceleration you're after, buy an old 69 Camaro like mine, and gut the interior, put a healthy small block or big block under the hood and drop in some 4:56/1 gears and hold on tight! That's what it takes to satisfy your neck snapping needs! Believe me! Drive the truck home from the races, and look good doing it. You know, the right tool for the right job! Link to comment Share on other sites More sharing options...
mwalls54 Posted September 18, 2003 Report Share Posted September 18, 2003 either way if you loose alot of back pressure on any new chevy engine it will loose power. oh it sounds awsome but the power loss if noticable. learned on my 00 silverado. i ran the ss with no muffler for about 6 miles from my house to muffler shop. sounded freaking awsome but ran very poor. so if the exhaust is too free flowing it can be a bad thing Link to comment Share on other sites More sharing options...
SuperDave Posted September 19, 2003 Report Share Posted September 19, 2003 Is that wax on the black SS or are you in the process of colorsanding the clear? Also, is that a Access Cover bed cover? If so, how do you like it? I need one in mine! Link to comment Share on other sites More sharing options...
venator Posted October 2, 2003 Report Share Posted October 2, 2003 So...what's the bottom line here guys? I'm about to get my 2004 SS either this week or next (been on order) and I need to know if I should keep my stock exhaust system or go to a dual. What should I do? Link to comment Share on other sites More sharing options...
mwalls54 Posted October 2, 2003 Report Share Posted October 2, 2003 i just replaced my muffler not a big performance but a big sound change. Link to comment Share on other sites More sharing options...
sslover Posted October 3, 2003 Report Share Posted October 3, 2003 what is this great sounding exsaust on the ss everybody is talking about ? my ss exsaust does not sound no different then my escalade. im realy starting to think there is somthing wrong with my truck. Link to comment Share on other sites More sharing options...
BenKey Posted October 3, 2003 Report Share Posted October 3, 2003 I don't know how "great" it is, but it is the best stock sounding truck I have owned. Sounds better with a cam though. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.