NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   Single Turbo Discussion (https://www.nopistons.com/single-turbo-discussion-13/)
-   -   Erm... Dont Shoot (https://www.nopistons.com/single-turbo-discussion-13/erm-dont-shoot-25427/)

epion2985 09-27-2003 09:16 PM

I do not try to argue, just sometimes state that somethings do not seem to add up, from my point of view anyway, which means I am asking for clarification and more indepth answers because I am trying to understand something because I want to learn. but if so many of you want me to go I can leave.

jspecracer7 09-27-2003 11:49 PM


Originally Posted by IGY' date='Sep 28 2003, 10:55 AM
If he was just asking questions that would be fine, but on a couple of occasions people gave very good info and he tried to argue with them. I say if you are not looking for the correct answer and just want to argue when you don't know ****, then go the **** away.



Come on Igy, these were the posts I was referring to:




Originally Posted by GarageBoy' date='Sep 26 2003, 01:14 PM
K&N makes a velocity stack/filter combo





[quote name='epion2985' date='Sep 27 2003, 06:51 AM']

how well does it preform?





[quote name='GarageBoy' date='Sep 28 2003, 05:17 AM']

No clue. I've only seen a picture of it.



[quote name='FrestyleFC3S' date='Sep 28 2003, 09:46 AM']

epion go away

[/quote][/quote][/quote]



At least he admitted that he wasn't sure of his "theorum" here:




Originally Posted by epion2985' date=' Sep 26 2003, 02:21 AM
that makes no sence. Turbos are spooled by the pressure of the exast gases, not their temperature, you can blow whatever you want through the exast housing to spool the turbo hot or cold. The only way I can see how heat helps is when thingsare hot they expand, so with hot gasses you would need less actuall gas (then cold gases) because the voluem will be bigger. But that means the temp of the gasses ENTERING the turbo play a key role, when inside heating them up seem rather pointless because by the time they will they will be out of the turbo already. I dont know, just trying to reason it out....





Give him a break guys. He's asking a TON of n00bie questions....I don't know crap about thermodynamics, just took everybody's word for it that it's better for exhaust gas to stay hot. I still remember the days I didn't understand what a wastegate did till I took apart an actuated turbo. Just takes time to learn and he's here to learn. Sure he argues a lot, but this board wouldn't be fun if we didn't argue(Dragon and ZeroBanger was a great thread)



When he makes a mistake on "theories" Correct him! But when someone tells epion to go away...when that particular person(from what I've seen) hasn't contributed JACK **** to the single turbo forum then that person needs to shut his mouth and contribute something "informative".

apexkw 09-28-2003 12:58 AM

ditto i like having epion here...its kinda nice to have a new topic discussed every now and again. sure epion has his moments but who here doesnt.

IGY 09-28-2003 03:12 AM


Originally Posted by jspecracer7' date='Sep 28 2003, 01:49 PM
Give him a break guys. He's asking a TON of n00bie questions....I don't know crap about thermodynamics, just took everybody's word for it that it's better for exhaust gas to stay hot. I still remember the days I didn't understand what a wastegate did till I took apart an actuated turbo. Just takes time to learn and he's here to learn. Sure he argues a lot, but this board wouldn't be fun if we didn't argue(Dragon and ZeroBanger was a great thread)



When he makes a mistake on "theories" Correct him! But when someone tells epion to go away...when that particular person(from what I've seen) hasn't contributed JACK **** to the single turbo forum then that person needs to shut his mouth and contribute something "informative".

He's rubbed alot of people the wrong way. I think it has a lot to do with the fact that he asks a question, waits for people to respond, and then trys to answer his own question. To ask a question is fine. To ask for clarification is fine. To state an answer (usually off the wall) to his own question later is annoying and gives the appearance of an arguement. If you don't like an answer or get conflicting answers go look it up yourself somewhere else. I think most of this could be squashed if he put his theory in his first post with his question.

DuMaurier 7 09-29-2003 02:42 PM

Some of you guys remind me why I don't like to go to my inlaws, my wife has six sisters and they are always arguing and wining about some thing or another https://www.nopistons.com/forums/pub...IR#>/wacko.png .

back to the topic of discussion , I have been working with very large "turbos" for the past 12 years , difference is these are HUMONGOUS compared to a turbo but the designs and principles remain the same.

These turbines are powered by 1500psi high temperature steam , they consume 112tonnes of steam per hour , so the velocity of the steam flowing through the turbine is pretty high , but there is one thing I have learned over the years , if the steam isn't at the right (very HOT) temp then the turbine WILL NOT be able to develop all of its rated 60000hp , there is even an auxiliary system in place to "SUPER HEAT" the steam.To make a long story short turbines require KINETIC , POTENTIAL and THERMAL energy to function properly.

On a ROTARY engine however , enough exhaust heat is never a problem , in fact the problem is having TOO much of it . If you want your turbo to last any amount of time you should NOT wrap your runners and / or put any type of heat shielding on the turbine housing.

These types of insulation cause TOO much heat retention which eventually (in a short space of time) causes the oil seal to burn and even melting of the edges of the turbine blades (the edges become serrated and don't work properly as the clearance between the blades and the inside of the housing opens up) both resulting in reduced performance and eventual failure of the turbo.

Wrapping and shielding makes a bigger difference with piston motors because they run a lot cooler on the exhaust side , so any additional heat translates into better turbo performance , for us there isn't any noticeable improvement in performance but a very noticeable change (increase) in exhaust gas temperature and an accompanying reduction in turbo life.

Those are just my two cents https://www.nopistons.com/forums/pub...#>/biggrin.png , I am not going to join the argument , I am just sharing some things I have seen , read and heard , I know how expensive this **** can become , I also don't want to see another little WANKEL be accused wrongly!! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

matt_sb2000 09-29-2003 03:17 PM

What do you work on? Nuclear powerplant stuff?

DuMaurier 7 09-29-2003 03:29 PM

Various Chemical plants making Methanol , Ammonia and Urea.

matt_sb2000 09-29-2003 03:41 PM

Scary.







Can I have some methanol? https://www.nopistons.com/forums/pub...#>/biggrin.png

epion2985 09-29-2003 03:41 PM


Originally Posted by DuMaurier 7' date='Sep 29 2003, 11:42 AM
Some of you guys remind me why I don't like to go to my inlaws, my wife has six sisters and they are always arguing and wining about some thing or another https://www.nopistons.com/forums/pub...IR#>/wacko.png .

back to the topic of discussion , I have been working with very large "turbos" for the past 12 years , difference is these are HUMONGOUS compared to a turbo but the designs and principles remain the same.

These turbines are powered by 1500psi high temperature steam , they consume 112tonnes of steam per hour , so the velocity of the steam flowing through the turbine is pretty high , but there is one thing I have learned over the years , if the steam isn't at the right (very HOT) temp then the turbine WILL NOT be able to develop all of its rated 60000hp , there is even an auxiliary system in place to "SUPER HEAT" the steam.To make a long story short turbines require KINETIC , POTENTIAL and THERMAL energy to function properly.

On a ROTARY engine however , enough exhaust heat is never a problem , in fact the problem is having TOO much of it . If you want your turbo to last any amount of time you should NOT wrap your runners and / or put any type of heat shielding on the turbine housing.

These types of insulation cause TOO much heat retention which eventually (in a short space of time) causes the oil seal to burn and even melting of the edges of the turbine blades (the edges become serrated and don't work properly as the clearance between the blades and the inside of the housing opens up) both resulting in reduced performance and eventual failure of the turbo.

Wrapping and shielding makes a bigger difference with piston motors because they run a lot cooler on the exhaust side , so any additional heat translates into better turbo performance , for us there isn't any noticeable improvement in performance but a very noticeable change (increase) in exhaust gas temperature and an accompanying reduction in turbo life.

Those are just my two cents https://www.nopistons.com/forums/pub...#>/biggrin.png , I am not going to join the argument , I am just sharing some things I have seen , read and heard , I know how expensive this **** can become , I also don't want to see another little WANKEL be accused wrongly!! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

makes sence, thanks for some great info

DuMaurier 7 09-29-2003 06:28 PM

I only sell methanol by the tonne , 1 tonne = $300USD. https://www.nopistons.com/forums/pub...#>/biggrin.png


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