Posted December 14, 200816 yr comment_268927 I have a 1978 280z 2+2 and i need some recommendations on a muffler.When I got the car it was running a straight pipe. I took it to get an exhust on it and they put on a resonator, and a magnaflow exhaust. 2.25 pipeshttp://www.magnaflow.com/02product/displayapplications.asp?partnumber=14820I dont know the resonator type, but this system is to loud. My main idea is to turn the car into a fun daily driver and not a race car. I do want a nice sound. but i want it to be quieter.I've been told that a flowmaster 40 series wouldn't fit, so could 60 series?heres the sizesFlowmaster 605" X 10 " X 13" - 19 " Overall LengthWill it fit?and what all can i do to make the car quiter i know they originaly came with 2 mufflers, can i fit a muffler like the flowmasters under the main body or is that a bad idea?Sorry for all the questions any help would be great. This is my first real project carThanks Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/ Share on other sites More sharing options...
December 14, 200816 yr Author comment_268928 oh and i'm not looking for a ricer muffler, the tin can look just doesnt look right Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-268928 Share on other sites More sharing options...
September 15, 201212 yr comment_401668 Better late than never. On my '77 280z, the original (muffler only) dimension is: 5.5" X 10 " X 15". Under the center of the car is a small second muffler (non-California car). I think this is a catalytic converter on the California model.I'm also looking at replacing the exhaust system, keeping with the original noise specs. Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401668 Share on other sites More sharing options...
September 15, 201212 yr comment_401669 Here's a cheap trick I found. Extend your tailpipe 8-10" beyond the end of your rear bumper.Yes, you will trip, catch your legs / pants on it every time you go around the rear of the car...Above about 35mph, ALL of the noise is being spewed out behind you, and you kinda "outrun" it. The car gets a lot quieter. I've done this on muscle cars, sports cars, all sorts of cars that I wanted a free flowing exhaust but not quite so much noise at mid and higher rpm's out on the highway, but a nice roar in town. Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401669 Share on other sites More sharing options...
September 15, 201212 yr comment_401670 Better late than never.Except that the OP hasn't been here since May of 2009 so he isn't likely to benefit from the answer. Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401670 Share on other sites More sharing options...
September 15, 201212 yr comment_401675 Except that the OP hasn't been here since May of 2009 so he isn't likely to benefit from the answer.Hi sblake01,Not doing this for his benefit, but for others like me. I have the same question. Wade, trying to keep the car pretty much original. Not looking to increase performance, just reliability. Just replace all fuel hoses with Gates Barricade hoses (rated for blended fuels). Read that E10 gas is breaking down the rubber in regular fuel hoses, causes all kinds of issues in older cars. Recently read that the gov is increasing gasoline to E15. How is E15 going to effect the fuel pump/injectors and performance? But that should be another post topic.Thanks. Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401675 Share on other sites More sharing options...
September 15, 201212 yr comment_401679 Another trick to make it a little quieter is to turn the tip toward the ground. I think Mopar had to do that around 1970 for cars sold in California.Chuck Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401679 Share on other sites More sharing options...
September 15, 201212 yr comment_401681 Hi Chuck,Another post I read said that turning the tip toward the ground will also reduce the smell of exhaust in the cabin when driving with the windows down. Cool that it also makes the car a little quieter.Thanks,Jim Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401681 Share on other sites More sharing options...
September 15, 201212 yr comment_401697 With ethanol more pricey than gasoline these days it's unlikely the government will MANDATE E15. A little ethanol (E5-10) gathers water, boosts, octane, and results in more complete combustion because of the oxygen it brings to the fireball, DESPITE the lower energy density of E10 gas vs non-alcohol-added. More than a little is of no benefit to any of those worthy goals and only lowers MPGs further. Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401697 Share on other sites More sharing options...
September 16, 201212 yr comment_401709 Don't forget this quote from Energy Secretary Steven Chu: “Somehow we have to figure out how to boost the price of gasoline to the levels in Europe.â€Many have the philosophy that higher gas prices will lower consumption and greenhouse gases.I hope you are right.After replacing 3 fuel injectors in my 1993 300zx, started using only non-ethanol gasoline $$$ in the 300zx. Haven't replace an injector since. Some say the ethanol effects the injector, others say it's the fuel hoses. The 280z now has all new ethanol resistant fuel hoses, so going to burn the E10 and see what happens. Edited September 16, 201212 yr by jkeese01 Link to comment https://www.classiczcars.com/forums/topic/30254-need-some-recommendations-for-a-280z-exhaust-system/#findComment-401709 Share on other sites More sharing options...
Create an account or sign in to comment