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Originally Posted by turbofan
(Post 1173336)
Also: ironically, "turbo" mufflers are not good for turbos. You want a large, straight through muffler. The turbo-labeled mufflers have chambers and bends inside which are not good for turbocharged vehicles.
I've bought it because I think is pretty much a straight pipe with two chamber, there aren't restriction of any type, all internals are 2.5", and my exhaust is 2 1/4" (60mm) All I want now is a silent exhaust, I can't drive with that loudness anymore... Can it flow decently or is a very bad idea to put it on? consider that I don't have any cat, resonator, nothing at all: only a 60mm straight pipe from the turbine to the muffler source: Attachment 184651 |
Can it flow decently? Sure. Is it optimal? Not even close. Can you get similar muffling with better performance? Yes.
The straight through Magnaflows are really what you want, that's why everyone here uses them. They're not as cheap as the "turbo" mufflers though. |
Originally Posted by DNA54
(Post 1173688)
Look, yes, it will be quiet. Yes, it will slightly degrade performance. No, it won't be terrible. There have been plenty of quiet factory turbocharged cars that use the same style of muffler. Removing them usually makes the car spool faster and make a bit more power. But it isn't the end of the world. Just don't complain if you lose 10-15whp. |
^ yup
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Originally Posted by sixshooter
(Post 1173704)
^Paid infomercial.
Look, yes, it will be quiet. Yes, it will slightly degrade performance. No, it won't be terrible. There have been plenty of quiet factory turbocharged cars that use the same style of muffler. Removing them usually makes the car spool faster and make a bit more power. But it isn't the end of the world. Just don't complain if you lose 10-15whp. shaved, back from the machine shop https://www.miataturbo.net/attachmen...ine=1412970447 https://www.miataturbo.net/attachmen...ine=1412970447 my new toy :party: https://www.miataturbo.net/attachmen...ine=1412970447 https://www.miataturbo.net/attachmen...ine=1412970447 last but not least: bammm, surprise!!! https://www.miataturbo.net/attachmen...ine=1412970447 internal diameter is now the same as the stock exhaust... I have 2 choices -remove the internal metal mesh -remove the joint and weld a straight pipe problems, problems everywhere :vash: |
Replace with part that doesn't suck. You do typically need some flex. You may reuse the flanges and just get a flex joint that doesn't suck.
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There is nothing straight through about that muffler in the cutaway. In fact I don't even see how the gasses get from the inlet to the outlet.
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Originally Posted by Mazdaspeeder
(Post 1174715)
There is nothing straight through about that muffler in the cutaway. In fact I don't even see how the gasses get from the inlet to the outlet.
But seriously, that's a bad angle to see it but the ends of the tubes are open right through those internal bulkheads. |
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Originally Posted by sixshooter
(Post 1174708)
Replace with part that doesn't suck. You do typically need some flex. You may reuse the flanges and just get a flex joint that doesn't suck.
https://www.miataturbo.net/attachmen...ine=1413051353 https://www.miataturbo.net/attachmen...ine=1413051353 https://www.miataturbo.net/attachmen...ine=1413051353 I want the car back!!! :party: |
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Originally Posted by Mazdaspeeder
(Post 1174715)
...I don't even see how the gasses get from the inlet to the outlet.
https://www.miataturbo.net/attachmen...4-24-13-pm-png |
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Originally Posted by m2cupcar
(Post 1174762)
blue line shows exhaust gas route- it passes around the middle inlet. I used one for a while, but yeah it makes a mess of exhaust gasses since it just dumps into the big can.
https://www.miataturbo.net/attachmen...4-24-13-pm-png ... or I will splice the exhaust in two 60mm pipes with two "turbo mufflers" :vash2: but for now, magnaflow straight muffler :fawk: some photos of the baby: https://www.miataturbo.net/attachmen...ine=1413144093 https://www.miataturbo.net/attachmen...ine=1413144093 and, for lurkers, the massive compressor wheel https://www.miataturbo.net/attachmen...ine=1413144093 http://i1379.photobucket.com/albums/...psce8f85ab.jpg |
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new oled display
https://www.miataturbo.net/attachmen...ine=1413876002 It's very cool: I don't need to delay the refresh like with the lcd one, and it's 100% visible from any condition (angolation, light/dark, etc) |
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aaand: turbo muffler installed
https://www.miataturbo.net/attachmen...ine=1413876252 As you all told me, I lose something on the butt dyno, expecially at high revs (over 6500) I'm pretty curious to dyno the car with/without the muffler, to see how much I lost |
Then dna said, "Let there be track"; and there was overheat.
only one lap before hit 100°C, but the car was great! I have a LOT to learn on a track, but next time I need at least a 50mm radiator. Will this be ok? http://www.ebay.it/itm/400763045502?...84.m1423.l2649 o this one is better? http://www.ebay.it/itm/131099412197?...84.m1423.l2649 the most important thing is the slim fans: I have 2.5" intake line |
100*C (212*F) is not overheating. That is normal. If it gets to 230*F then you must slow down and cool off.
External oil coolers are a good idea as well as the bigger radiator. I don't have any opinions about the two radiators you listed other than the fact that having a fan shroud is a good thing. |
Agreed- that's not hot. I like having an oil temp gauge. Should we assume you have taken all the preliminary steps to improving the stock cooling systems as posted on this site?
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At the end of the second lap the temperature rises to 120°C (248*F)
I've only done a reroute and the radiator ducting, and on the road the maximum temperature I can see is 100°C I really hope I can solve with a bigger core... the oil cooler is really necessary? It's my daily car, I plan to go on track maximum 2-3 times a year |
I like the 20hp sticker.
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A larger core will help both in thermal capacity (more coolant volume takes longer to heat up) and in more surface area to aid in heat transfer.
An external oil cooler isn't a big deal to install if you've already done things like adding a reroute. They make a difference. |
news: if I stop the engine at 100°C around half a litre exits from the coolant tank.
Cooked head gasket? Maybe is the overheat problem cause... |
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