beandip Posted March 2, 2005 Share #1 Posted March 2, 2005 Is any one running one of these mufflers with 2 1/2'' systime with headers ? I am debating on this one or a simular but streight through muffler made by the same co. Gary Link to comment Share on other sites More sharing options...
Bambikiller240 Posted March 2, 2005 Share #2 Posted March 2, 2005 Gary: You may want to read these threads. Some people say that a 2-1/4" pipe is better than 2-1/2". My car has a 2" and I've had another 240Z with a 3" pipe system, never had any experience with in between sizes. Summit Racing seems to have some of the best prices.http://www.classiczcars.com/forums/showthread.php?t=6082&highlight=Dynomax+Super+Turbohttp://www.classiczcars.com/forums/showthread.php?t=9770&highlight=Dynomax+Super+Turbo Link to comment Share on other sites More sharing options...
ZSaint Posted March 3, 2005 Share #3 Posted March 3, 2005 I looked at some posts about these mufflers. I did not have my Z very long before I took it apart. Which way do these mufflers go.... inlet/outlet? I had an old stock muffler on it and I do not remember the set-up. Is the inlet in the middle and the outlet on the bottom? :paranoid: I found a pic of the stock muffler. It was round and the inlet was at the bottom and the outlet was at the top. What about the Dynomax mufflers... Do I want the outlet on top or in the middle? I am guessing I want the inlet to be in the center, correct? Link to comment Share on other sites More sharing options...
Bambikiller240 Posted March 3, 2005 Share #4 Posted March 3, 2005 My current Z has a 2" dia. Monza style system on it, but a previous Z of mine had a 3" dia pipe system with a Chevy Corvair Turbo Muffler on it. IIRC, the inlet was in the center and the outlet was at the bottom. I have an Inquiry in to Dynomax about the correct P/N for a 240Z. We'll see if they respond.Meanwhile here is the catalog of Dynomax Super Turbo Mufflers. (as of the date of this post) Link to comment Share on other sites More sharing options...
jmortensen Posted March 3, 2005 Share #5 Posted March 3, 2005 I got my 2 1/2" Dynomax Super Turbo from JC Whitney for $29.49. Bought mandrel bends from them at the same time to make the rest of the system. That was a few years back, don't know the current price on the muffler. I'm running it with triple 44's and the MSA header. Have a listen: http://album.hybridz.org/showphoto.php?photo=1562&sort=1&cat=500&page=1 Link to comment Share on other sites More sharing options...
beandip Posted March 3, 2005 Author Share #6 Posted March 3, 2005 Gary: You may want to read these threads. Some people say that a 2-1/4" pipe is better than 2-1/2". My car has a 2" and I've had another 240Z with a 3" pipe system, never had any experience with in between sizes. Summit Racing seems to have some of the best prices.http://www.classiczcars.com/forums/showthread.php?t=6082&highlight=Dynomax+Super+Turbohttp://www.classiczcars.com/forums/showthread.php?t=9770&highlight=Dynomax+Super+TurboCarl, I agree with the 2 1/4'' being the best for street , and I would go that route , except I have a 2 1/2'' mandrel bent plumbing already and want to just replace the muffler . I would go with the duel pipes as I have had these before and if they are interconnected it helps to eliminate the resonance. But with the 2 1/2 I don't want to be setting off car alarms. I have had the Thrush turbo and found it lacking and burned out quickly .The Super Turbo is there higher quality unit and I most likely will go that route. Thanks all . Gary Link to comment Share on other sites More sharing options...
Bambikiller240 Posted March 3, 2005 Share #7 Posted March 3, 2005 My exhaust system is very old and when it fails, I will be getting a Super Turbo Muffler as well. Probably will also have a resonator in the middle of the system. Definitely won't be going with a header. I'm satisfied with the OEM manifold, but I might have it sent out for Jet Hot coating, or I'll try a Do-It-Yourself coating. Link to comment Share on other sites More sharing options...
ZSaint Posted March 3, 2005 Share #8 Posted March 3, 2005 I looked at the Dynomax webpage and could not find the #17723 turbo muffler. I did find a 17733 that seemed correct. I just do not know about the inlet/outlet needs. Maybe someone can get Dynomax to tell us the correct number. Someone sent them a message. Maybe they will respond. Link to comment Share on other sites More sharing options...
Mike Posted March 3, 2005 Share #9 Posted March 3, 2005 There have been many threads about exhaust size in the mailing list over the years. I think the major points were related to sound. A 2.25" exhaust is quieter than a 2.5" exhaust and the performance differences are null. I had a 2.5" exhaust and absolutely loved it. Of course I didn't drive my Z long distances. The sound from this setup is amazing and I had people asking me if I installed a V8 in my car... Link to comment Share on other sites More sharing options...
ZSaint Posted March 3, 2005 Share #10 Posted March 3, 2005 I know there are new studies out that show improvement in torque and hp ratings for larger exhaust pipes. These have been done on V/8 cars, of course. I saw (Mopar Muscle) a Challenger that had an X-pipe with a 2 1/4" system changed to a 3" system. They picked up 12 hp and I think 16 hp in torque improvement. This was on a 300 hp crate 360 ci engine. That is a 4-5% gain. I have not seen any chassis dyno work for a similar change on the L6 engine. I might be interesting to know the outcome. I am installing a 2 1/2" system on my '71 240Z (carbureted 280ZX engine). It seems like the correct size for the exhaust system. I will use the header (6-2-1) pipe size (2 1/2") for the entire system. I cannot see the advantage in running a larger system on a street car. I think this will breathe very well at 6,750! Link to comment Share on other sites More sharing options...
Sean240Z Posted March 3, 2005 Share #11 Posted March 3, 2005 Beandip,I've got a 2.5" mandrel bent exhaust system with the Dynomax Ultraflow SS with a Dynomax Bullet Race Muffler installed as a resonator just aft of the MSA 6-1 header collector. You can get the part #'s and sources I used from the following thread.http://www.classiczcars.com/forums/showthread.php?t=12474&page=2&pp=15&highlight=dynomax+2.5%22I love the sound and performance of my exhaust set-up. I do not find the exhaust too loud (I just drove to Orlando and back last weekend for ZFest ~ 900 miles) or the resonance bad at all (almost non-existent).ZSaint,As for the muffler, the inlet is in the middle and the outlet is at the bottom.Cheers Link to comment Share on other sites More sharing options...
ZSaint Posted March 3, 2005 Share #12 Posted March 3, 2005 Great stuff. I will look at the info you provided. I want to make certain that this system is not LOUD. I do not want to sound like a fart can! Link to comment Share on other sites More sharing options...
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