[AD removed for archives] ------------------------------------------------------------------- 2-Day Tax Refund Loans TaxBrain Online Tax Service Get Started Now! caac8vha/TaxBrain ------------------------------------------------------------------- I think I see a pattern here. What I think is going on, is with headers what you want is an exhaust system that is a .5" smaller than the collecters, it can actually benefit maybe? I believe the Charger style exhaust manifolds I'm using are 2.5", perhaps I should stick to that size through out the entire system? Makes sense to me, how bout you? ----- Original Message ----- From: tom hecht Sent: Thursday, February 03, 2005 5:05 PM To: 1962to1965mopars@xxxxxxxxxx Subject: Re: cam in my 383 [AD removed for archives] ------------------------------------------------------------------- We have the 42 Inch Plasma TV you've been looking for!! Sony or Panasonic 42 Inch Plasma Wide Screen TV's. Put one up on your wall today! Click Below caac8uBbOlZxua/ExclusiveRewards ------------------------------------------------------------------- i am with gary on this one, i had 3" collectors (headmans) on when i went from 2-1/2 to 3" exhaust, it slowed the car by about 2 tenths, though that exhaust system added about 5 tenths to my quarter. on the other hand i currently have 3-1/2" collectors with the 3" tti x-pipe and dynomax's, there is virtually no difference in times with open headers or with exhaust. when i talked to tti, he said the car they sponsor races with the x-pipe/dynomax exhaust also. i believe the car he was talking about is a 64 dodge. i switched cam, intake and headers at the same time, so i can't say what difference, the exhaust made, but the combo picked up about 3 tenths. tom "Ben Jr. Morgan" <polara_hotrods@xxxxxxx> wrote: So what your saying is you think that 3" is a little too much. I have 2.5" on there right now and I'm not entirely impressed with the sound and flow. perhaps somewhere in between, I'm open to any suggestions, I want to make sure my High Performance engine gets what it deserves. ----- Original Message ----- From: Gary H. Sent: Wednesday, February 02, 2005 8:12 PM To: 1962to1965mopars@xxxxxxxxxx Subject: RE: cam in my 383 [AD removed for archives] ------------------------------------------------------------------- Get a FREE* Portable Satellite Radio - yours to keep! Click Here! caac8uybOlZxua/Portable Satellite Radio Promotion ------------------------------------------------------------------- My understanding is that too big of an exhaust results in lost performance, and mufflers have come a long way since glasspacks. You can get straight through without the noise consequence or wear of glasspacks. For example: "Exhaust pipe sizes are a subject unto themselves, but here are a few general guidelines from a man who knows. Although many subscribe to the "huge is best" theory of pipe selection, Jones points out that bigger is not necessarily better, and this is coming from a man with an impressive engineering and manufacturing background. Jones advises that while pipes that are too small can increase backpressure, they must not be so large that gas velocity drops off. Fast moving gasses help evacuate the cylinders, which is often referred to as the scavenging effect. And while larger pipes may reduce backpressure (the industry standard is 2.8 lbs with 1.8 to 2.2 lbs believed to be the optimum), Jones points out that oversize pipes will result in lower exhaust gas velocity, which reduces the scavenging effect, which reduces low-end torque." http://www.streetrodderweb.com/tech/0204sr_exhaust/ and http://www.burnsstainless.com/TechArticles/Theory/theory.html You could go with DynoMAX Super Turbo Performance Mufflers or even stock mufflers. Want to race? Open up those cut outs. :-) Gary H. Ben Jr. Morgan wrote: > > I just entered a Metal Technology class (its a welding and fabricating > class basically) at the high school. I'm planning an exhaust system for > the 64 wagon. I'm thinking 3" exhaust with cut outs behind the headers, > glass packs, and chrome angled tips turned sideways to dump flush with > the body in front of the wheels. (dumping in front of the wheels may be > illegal on the street, but they have to catch me first ;)) What do you > wrench heads think? [AD removed for archives] ------------------------------------------------------------------- Click here and get your free* stock car racing gift. caac8uabOlZxuf/PermissionData ------------------------------------------------------------------- ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. 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